idea+spring4+springmvc+mybatis+maven 实现简单增删改查 CRUD

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发布于: 2020 年 05 月 01 日
在学习spring4+springmvc+mybatis的ssm框架，简单实现增删改查功能，在这里记录一下。
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工作环境：
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Windows 10
jdk8(1.8)
IntelliJ IDEA 
spring 4 和 springMVC
MySQL 5.7
maven 3.3
mybatis 3.4
DBCP
Tomcat 8.5
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项目上传到了Github方便查看：https://github.com/finch-xu/springbook/tree/0.9 有用的话欢迎加星。
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页面演示：
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首先新建项目
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如图所示新建maven的webapp
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建数据库和数据表
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CREATE DATABASE books;
CREATE TABLE `bookadmin`  (
  `bid` int(11) NOT NULL AUTO_INCREMENT,
  `bn` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
  `author` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
  `press` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
  PRIMARY KEY (`bid`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 14 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;
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这里是项目目录结构
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springbook
   ├── src
   │   └── main
   │       ├── java
   │       │   └── cn
   │       │       └── book
   │       │           ├── controller
   │       │           │   └── BooksController.java
   │       │           ├── mapper
   │       │           │   ├── BooksMapper.java
   │       │           │   └── BooksMapper.xml
   │       │           ├── pojo
   │       │           │   └── Bookadmin.java
   │       │           └── service
   │       │               ├── BooksServiceImpl.java
   │       │               └── BooksService.java
   │       ├── resources
   │       │   ├── applicationContext-dao.xml
   │       │   ├── applicationContext-service.xml
   │       │   ├── applicationContext-trans.xml
   │       │   ├── jdbc.properties
   │       │   ├── log4j.properties
   │       │   ├── spring-mvc.xml
   │       │   └── sqlMapConfig.xml
   │       └── webapp
   │           ├── index.jsp
   │           └── WEB-INF
   │               ├── jsp
   │               │   ├── listBooks.jsp
   │               │   ├── savepage.jsp
   │               │   └── updatepage.jsp
   │               └── web.xml
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pom.xml 找不到的包可以去https://mvnrepository.com/ 这里找，很方便的。
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<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>cn.book</groupId>
  <artifactId>spring</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>war</packaging>
  <name>spring Maven Webapp</name>
  <!-- FIXME change it to the project's website -->
  <url>http://www.example.com</url>
  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <!--<maven.compiler.source>1.8</maven.compiler.source>-->
    <!--<maven.compiler.target>1.8</maven.compiler.target>-->
    <spring.version>4.3.19.RELEASE</spring.version>
    <validator.version>5.2.4.Final</validator.version>
    <slf4j.version>1.7.7</slf4j.version>
    <commons-lang3.version>3.3.2</commons-lang3.version>
    <commons-io.version>2.4</commons-io.version>
    <commons-codec.version>1.9</commons-codec.version>
    <commons-fileupload.version>1.3.1</commons-fileupload.version>
    <commons-beanutils.version>1.9.1</commons-beanutils.version>
  </properties>
  <dependencies>
    <!-- WEB begin -->
      <dependency>
          <groupId>org.mybatis</groupId>
          <artifactId>mybatis</artifactId>
          <version>3.2.8</version>
      </dependency>
      <dependency>
          <groupId>org.mybatis</groupId>
          <artifactId>mybatis-spring</artifactId>
          <version>1.2.2</version>
      </dependency>
      <dependency>
          <groupId>mysql</groupId>
          <artifactId>mysql-connector-java</artifactId>
          <version>5.1.29</version>
      </dependency>
      <dependency>
      <groupId>org.apache.maven.plugins</groupId>
      <artifactId>maven-compiler-plugin</artifactId>
      <version>2.3.2</version>
    </dependency>
    <dependency>
      <groupId>taglibs</groupId>
      <artifactId>standard</artifactId>
      <version>1.1.2</version>
      <type>jar</type>
    </dependency>
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
      <type>jar</type>
    </dependency>
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>3.1.0</version>
      <!--<scope>provided</scope>-->
    </dependency>
    <dependency>
      <groupId>javax.servlet.jsp</groupId>
      <artifactId>jsp-api</artifactId>
      <version>2.1</version>
      <!--<scope>provided</scope>-->
    </dependency>
    <!-- WEB end -->
    <!-- SPRING begin -->
    <dependency>
      <groupId>commons-dbcp</groupId>
      <artifactId>commons-dbcp</artifactId>
      <version>1.4</version>
    </dependency>
    <dependency>
      <groupId>com.esotericsoftware.reflectasm</groupId>
      <artifactId>reflectasm</artifactId>
      <version>1.09</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>4.2.6.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>4.2.6.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>${spring.version}</version>
      <exclusions>
        <exclusion>
          <groupId>commons-logging</groupId>
          <artifactId>commons-logging</artifactId>
        </exclusion>
      </exclusions>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-beans</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context-support</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aop</artifactId>
      <version>${spring.version}</version>
      <exclusions>
        <exclusion>
          <groupId>commons-logging</groupId>
          <artifactId>commons-logging</artifactId>
        </exclusion>
      </exclusions>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <!-- spring orm -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-orm</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>javax.inject</groupId>
      <artifactId>javax.inject</artifactId>
      <version>1</version>
    </dependency>
    <!-- bean validate -->
    <!--<dependency>-->
      <!--<groupId>org.hibernate</groupId>-->
      <!--<artifactId>hibernate-validator</artifactId>-->
      <!--<version>${validator.version}</version>-->
    <!--</dependency>-->
    <!-- SPRING end -->
    <!-- AOP begin -->
    <dependency>
      <groupId>org.aspectj</groupId>
      <artifactId>aspectjrt</artifactId>
      <version>1.7.4</version>
    </dependency>
    <dependency>
      <groupId>org.aspectj</groupId>
      <artifactId>aspectjweaver</artifactId>
      <version>1.7.4</version>
    </dependency>
    <dependency>
      <groupId>cglib</groupId>
      <artifactId>cglib</artifactId>
      <version>3.1</version>
    </dependency>
    <!-- AOP end -->
    <!-- TEST begin -->
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.12</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-test</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-oxm</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <!-- TEST end -->
    <!-- LOGGING begin -->
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-api</artifactId>
      <version>${slf4j.version}</version>
    </dependency>
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-log4j12</artifactId>
      <version>${slf4j.version}</version>
    </dependency>
    <!-- common-logging 实际调用slf4j -->
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>jcl-over-slf4j</artifactId>
      <version>${slf4j.version}</version>
    </dependency>
    <!-- java.util.logging 实际调用slf4j -->
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>jul-to-slf4j</artifactId>
      <version>${slf4j.version}</version>
    </dependency>
    <!-- LOGGING end -->
    <dependency>
      <groupId>commons-lang</groupId>
      <artifactId>commons-lang</artifactId>
      <version>2.6</version>
    </dependency>
    <dependency>
      <groupId>commons-io</groupId>
      <artifactId>commons-io</artifactId>
      <version>${commons-io.version}</version>
    </dependency>
    <dependency>
      <groupId>commons-codec</groupId>
      <artifactId>commons-codec</artifactId>
      <version>${commons-codec.version}</version>
    </dependency>
    <dependency>
      <groupId>commons-fileupload</groupId>
      <artifactId>commons-fileupload</artifactId>
      <version>${commons-fileupload.version}</version>
    </dependency>
    <dependency>
      <groupId>commons-beanutils</groupId>
      <artifactId>commons-beanutils</artifactId>
      <version>${commons-beanutils.version}</version>
      <exclusions>
        <exclusion>
          <groupId>commons-logging</groupId>
          <artifactId>commons-logging</artifactId>
        </exclusion>
      </exclusions>
    </dependency>
    <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
      <version>1.16.18</version>
      <scope>provided</scope>
    </dependency>
  </dependencies>
  <build>
    <defaultGoal>install</defaultGoal>
    <pluginManagement>
      <plugins>
        <plugin>
          <groupId>org.apache.maven.plugins</groupId>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>2.3.2</version>
          <configuration>
            <source>1.8</source>
            <target>1.8</target>
            <maxmem>256M</maxmem>
          </configuration>
        </plugin>
        <plugin>
          <groupId>org.apache.maven.plugins</groupId>
          <artifactId>maven-idea-plugin</artifactId>
          <version>2.2</version>
          <configuration>
            <downloadSources>true</downloadSources>
            <downloadJavadocs>true</downloadJavadocs>
          </configuration>
        </plugin>
        <plugin>
          <groupId>org.apache.maven.plugins</groupId>
          <artifactId>maven-resources-plugin</artifactId>
          <version>2.4.3</version>
        </plugin>
        <plugin>
          <groupId>org.apache.maven.plugins</groupId>
          <artifactId>maven-clean-plugin</artifactId>
          <version>2.4.1</version>
          <configuration>
            <filesets>
              <fileset>
                <directory>activemq-data</directory>
              </fileset>
            </filesets>
          </configuration>
        </plugin>
        <plugin>
          <groupId>org.apache.maven.plugins</groupId>
          <artifactId>maven-install-plugin</artifactId>
          <version>2.3.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-remote-resources-plugin</artifactId>
          <version>1.1</version>
        </plugin>
        <plugin>
          <groupId>org.apache.maven.plugins</groupId>
          <artifactId>maven-jar-plugin</artifactId>
          <version>2.2</version>
        </plugin>
        <plugin>
          <groupId>org.apache.maven.plugins</groupId>
          <artifactId>maven-dependency-plugin</artifactId>
          <version>2.1</version>
        </plugin>
        <plugin>
          <groupId>org.apache.maven.plugins</groupId>
          <artifactId>maven-surefire-plugin</artifactId>
          <version>2.5</version>
        </plugin>
        <plugin>
          <groupId>org.apache.maven.plugins</groupId>
          <artifactId>maven-checkstyle-plugin</artifactId>
          <version>2.6</version>
        </plugin>
        <plugin>
          <groupId>org.codehaus.mojo</groupId>
          <artifactId>exec-maven-plugin</artifactId>
          <version>1.1.1</version>
        </plugin>
      </plugins>
    </pluginManagement>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-surefire-plugin</artifactId>
        <configuration>
          <childDelegation>false</childDelegation>
          <useFile>true</useFile>
          <failIfNoTests>false</failIfNoTests>
          <includes>
            <include>**/*Test.java</include>
          </includes>
        </configuration>
      </plugin>
    </plugins>
     <resources>
      <resource>
        <directory>src/main/java</directory>
        <includes>
          <include>**/*.properties</include>
          <include>**/*.xml</include>
        </includes>
        <filtering>false</filtering>
      </resource>
       <resource>
       <directory>src/main/resources</directory>
       <includes>
         <include>**/*.properties</include>
         <include>**/*.xml</include>
       </includes>
       <filtering>false</filtering>
       </resource>
    </resources>
  </build>
</project>
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一定要注意这段内容，在maven打包war时扫描这些xml文件     
<resources>
      <resource>
        <directory>src/main/java</directory>
        <includes>
          <include>**/*.properties</include>
          <include>**/*.xml</include>
        </includes>
        <filtering>false</filtering>
      </resource>
       <resource>
       <directory>src/main/resources</directory>
       <includes>
         <include>**/*.properties</include>
         <include>**/*.xml</include>
       </includes>
       <filtering>false</filtering>
       </resource>
</resources>
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resources
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applicationContext-dao.xml 用的dbcp连接池。
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<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
	http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
	http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
	http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">
	<!-- 数据库连接池 -->
	<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
		<property name="location" value="classpath:jdbc.properties"/>
	</bean>
	<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
		<property name="driverClassName" value="${jdbc.driver}" />
		<property name="url" value="${jdbc.url}" />
		<property name="username" value="${jdbc.username}" />
		<property name="password" value="${jdbc.password}" />
		<!-- 连接池的最大数据库连接数 -->
		<property name="maxActive" value="${jdbc.maxActive}" />
		<!-- 最大空闲数 -->
		<property name="maxIdle" value="${jdbc.maxIdle}" />
	</bean>
	<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
		<property name="dataSource" ref="dataSource" />
		<!-- 加载mybatis核心配置文件 -->
		<property name="configLocation" value="classpath:sqlMapConfig.xml" />
		<!-- 别名包扫描 -->
		<property name="typeAliasesPackage" value="cn.book.pojo" />
	</bean>
    <!-- 动态代理，第二种方式：包扫描（推荐）： -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    	<!-- basePackage多个包用","分隔 -->
    	<property name="basePackage" value="cn.book.mapper" />
    </bean>
</beans>
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applicationContext-service.xml
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<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
	http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
	http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
	http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">
	<!-- @Service包扫描器 -->
	<context:component-scan base-package="cn.book.service"/>
</beans>
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applicationContext-trans.xml
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<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
	http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
	http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
	http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">
	<!-- 事务管理器 -->
	<bean id="transactionManager"
		class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
		<!-- 数据源 -->
		<property name="dataSource" ref="dataSource" />
	</bean>
	<!-- 通知 -->
	<tx:advice id="txAdvice" transaction-manager="transactionManager">
		<tx:attributes>
			<!-- 传播行为 -->
			<tx:method name="save*" propagation="REQUIRED" />
			<tx:method name="insert*" propagation="REQUIRED" />
			<tx:method name="delete*" propagation="REQUIRED" />
			<tx:method name="update*" propagation="REQUIRED" />
			<tx:method name="find*" propagation="SUPPORTS" read-only="true" />
			<tx:method name="get*" propagation="SUPPORTS" read-only="true" />
			<tx:method name="query*" propagation="SUPPORTS" read-only="true" />
		</tx:attributes>
	</tx:advice>
	<!--&lt;!&ndash; 切面 &ndash;&gt;-->
	<!--<aop:config>-->
		<!--<aop:advisor advice-ref="txAdvice"-->
			<!--pointcut="execution(* cn.book.service.*.*(..))" />-->
	<!--</aop:config>-->
</beans>
﻿
jdbc.properties 这里要注意应定要加上“jdbc.”的前缀。我用的是mysql5.7所以driver直接这么写就行，如果是mysql6及以上的就不一样了，具体百度吧。
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如果遇到什么时区问题，记得在url后边再加上时区设置就行了。
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jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://127.0.0.1:3306/books?useUnicode=true&characterEncoding=utf-8
jdbc.username=root
jdbc.password=12345678
jdbc.maxActive=10
jdbc.maxIdle=5
﻿
spring-mvc.xml
﻿
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">
    <!-- 配置@controller扫描包 -->
    <!--<context:component-scan base-package="cn.book.controller" />-->
    <context:annotation-config/>
    <context:component-scan base-package="cn.book.controller">
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>
    <!-- 配置注解驱动，相当于同时使用最新处理器映射跟处理器适配器,对json数据响应提供支持 -->
    <mvc:annotation-driven />
    <mvc:default-servlet-handler/>
    <!-- 配置视图解析器 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
</beans>
﻿
sqlMapConfig.xml
﻿
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
</configuration>
﻿
web.xml 这里的最后一部分（有注释的那里）写的是/而不是/*，因为用了后者就把jsp也当静态文件了，访问页面直接显示源代码而不是解析jsp。
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<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">
    <display-name>Archetype Created Web Application</display-name>
    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>
    <!-- 配置spring -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext*.xml</param-value>
    </context-param>
    <!-- 使用监听器加载Spring配置文件 -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <!-- 解决post乱码问题 -->
    <filter>
        <filter-name>encoding</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <!-- 设置编码参是UTF8 -->
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>encoding</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <!-- 前端控制器 -->
    <servlet>
        <servlet-name>springmvc-web</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:spring-mvc.xml</param-value>
        </init-param>
    </servlet>
    <servlet-mapping>
        <servlet-name>springmvc-web</servlet-name>
        <url-pattern>/</url-pattern><!--这里写的是/而不是/*，因为用了后者就把jsp也当静态文件了-->
    </servlet-mapping>
</web-app>
﻿
然后就是代码：
﻿
Mapper部分：
﻿
BooksMapper.xml
﻿
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="cn.book.mapper.BooksMapper">
    <sql id="BASE_TABLE">
        bookadmin
    </sql>
    <sql id="BASE_COLUMN">
        bid,bn,author,press
    </sql>
    <!--<resultMap id="BaseResultMap" type="cn.book.pojo.Bookadmin">-->
        <!--<id column="bid" property="bid" jdbcType="INTEGER" />-->
        <!--<result column="bn" property="bn" jdbcType="VARCHAR" />-->
        <!--<result column="author" property="author" jdbcType="VARCHAR" />-->
        <!--<result column="press" property="press" jdbcType="VARCHAR" />-->
    <!--</resultMap>-->
    <insert id="insert" parameterType="Bookadmin">
        INSERT INTO
        <include refid="BASE_TABLE"/>
        <trim prefix="(" suffix=")" suffixOverrides=",">
            bn,author,
            <if test="press != null">
                press,
            </if>
        </trim>
        <trim prefix="VALUES(" suffix=")" suffixOverrides=",">
            #{bn,jdbcType=VARCHAR},#{author,jdbcType=VARCHAR},
            <if test="press != null">
                #{press,jdbcType=VARCHAR},
            </if>
        </trim>
    </insert>
    <select id="getBookByBid" resultType="Bookadmin">
        select bid,bn,author,press from bookadmin where bid = #{bid}
    </select>
    <select id="list" resultType="Bookadmin">
        select * from bookadmin
    </select>
    <update id="update" parameterType="Bookadmin">
        update
        <include refid="BASE_TABLE"/>
        set bn = #{bn},author = #{author},press = #{press}
        where bid = #{bid}
    </update>
    <delete id="delete" parameterType="Bookadmin">
        delete
        from
        <include refid="BASE_TABLE"/>
        where bid = #{bid}
    </delete>
    <!--resultType="Bookadmin"-->
</mapper>
﻿
BooksMapper.java
﻿
package cn.book.mapper;
import cn.book.pojo.Bookadmin;
import java.util.List;
public interface BooksMapper{
    List<Bookadmin> list();
    int insert(Bookadmin record);
    int update(Bookadmin b);
    int delete(Bookadmin bid);
    Bookadmin getBookByBid(Integer bid);
}
﻿
POJO实体
﻿
Bookadmin.java
﻿
package cn.book.pojo;
public class Bookadmin {
    Integer bid;
    String bn;
    String author;
    String press;
    public Integer getBid() {
        return bid;
    }
    public void setBid(Integer bid) {
        this.bid = bid;
    }
    public String getBn() {
        return bn;
    }
    public void setBn(String bn) {
        this.bn = bn;
    }
    public String getAuthor() {
        return author;
    }
    public void setAuthor(String author) {
        this.author = author;
    }
    public String getPress() {
        return press;
    }
    public void setPress(String press) {
        this.press = press;
    }
}
﻿
service部分
﻿
BooksService.java
﻿
package cn.book.service;
import cn.book.pojo.Bookadmin;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public interface BooksService {
    List<Bookadmin> list();
    int insertBook(Bookadmin bookadmin);
    int update(Bookadmin b);
    int deleteBookByBid(Bookadmin bid);
    Bookadmin getBookByBid(int bid);
}
﻿
BooksServiceImpl.java
﻿
package cn.book.service;
import cn.book.mapper.BooksMapper;
import cn.book.pojo.Bookadmin;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class BooksServiceImpl implements BooksService {
    @Autowired
    private BooksMapper booksMapper;
    //    列出数据
    @Override
    public List<Bookadmin> list(){
        List<Bookadmin> list = this.booksMapper.list();
        return list;
    }
    //    插入数据
    @Override
    public int insertBook(Bookadmin bookadmin){
        return booksMapper.insert(bookadmin);
    }
    //    更新数据
    @Override
    public int update(Bookadmin b){
        return booksMapper.update(b);
    }
    //    删除数据
    @Override
    public int deleteBookByBid(Bookadmin bid){
        return booksMapper.delete(bid);
    }
    @Override
    public Bookadmin getBookByBid(int bid){
        return booksMapper.getBookByBid(bid);
    }
}
﻿
Controller部分
﻿
BooksController.java
﻿
package cn.book.controller;
import cn.book.pojo.Bookadmin;
import cn.book.service.BooksService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;
import java.util.List;
@Controller
@RequestMapping("/a")
public class BooksController {
    @Autowired
    BooksService booksService;
    //列出数据表格
    //    设置listBooks页面(list第一种写法)
    @RequestMapping("/listBooks")
    public ModelAndView listBooks(){
        ModelAndView mav = new ModelAndView();
        List<Bookadmin> bb = booksService.list();
        mav.addObject("bb",bb);
        mav.setViewName("listBooks");
        return mav;
    }
    //    list的第二种写法
//    @RequestMapping("/listBooks")
//    public String listBooks(Model model){
//        List<Bookadmin> bb = booksService.list();
//        model.addAttribute("bb",bb);
//        return "listBooks";
//    }
    //    添加数据（两部分）
    //    第一步：跳转到这里并添加图书信息，点击添加按钮就执行下边第二段代码
    @RequestMapping("/addBooks0")
    public String addBooks0(){
        return "savepage";
    }
    //    第二步：把下边的页面数据返回给后端，再跳转到listBooks页面
    @RequestMapping(value = "/addBooks",method = RequestMethod.POST)
    public String addBooks(Bookadmin bookadmin){
        booksService.insertBook(bookadmin);
        return "redirect:listBooks";
    }
    //    修改数据（两部分）
    //    第一步：更新图书，先通过bid找到图书，并列在/updatepage/{bid}页面上，
    @RequestMapping("/updatepage/{bid}")
    public String updatepage(@PathVariable("bid") int bid,Model model){
        model.addAttribute("bookadmin",booksService.getBookByBid(bid));
        return "updatepage";
    }
    //    第二步：然后修改即可，在这里点更新提交数据给后端
    @RequestMapping(value = "/update",method = RequestMethod.POST)
    public String update(Bookadmin b){
        booksService.update(b);
        return "redirect:listBooks";
    }
    //    删除图书数据
    @RequestMapping("/deleteBooksByBid")
    public String deleteBooksByBid(Bookadmin bid){
        booksService.deleteBookByBid(bid);
        return "redirect:listBooks";
    }
}
﻿
JSP页面
﻿
listBooks.jsp 列出所有的图书信息（并且包含添加、修改和删除的功能按钮）
﻿
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%--^^^^^添加对jstl列表的支持^^^^^--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>listBooks</title>
</head>
<body>
<form>
<table align="center" bgcolor="aqua" border="1" cellpadding="0">
    <tr>
        <th width="140">图书BID</th>
        <th width="140">书名</th>
        <th width="140">作者</th>
        <th width="140">出版社</th>
        <th width="140">修改</th>
        <th width="140">删除</th>
    </tr>
    <c:forEach items="${bb}" var="b"> <%--varStatus="ct"--%>
        <tr>
            <td>${b.bid}</td>
            <td>${b.bn}</td>
            <td>${b.author}</td>
            <td>${b.press}</td>
            <td><a href="${pageContext.request.contextPath}/a/updatepage/${b.bid}">修改</a></td>
            <td><a href="${pageContext.request.contextPath}/a/deleteBooksByBid?bid=${b.bid}" onclick='return confirm("确认要删除吗?")'>删除</a></td>
        </tr>
    </c:forEach>
    <%--<td><a href="${pageContext.request.contextPath}/a/addBooks0">添加图书(跳转页面)</a></td>--%>
</table>
</form>
<form id="saveForm" action="${pageContext.request.contextPath}/a/addBooks" method="post">
<table align="center" bgcolor="aqua" border="1" cellpadding="0">
    <tr>
        <th width="140">书名</th>
        <th width="140">作者</th>
        <th width="140">出版社</th>
    </tr>
    <tr>
        <td width="140"><input type="text" value="${bookadmin.bn}" name="bn"/></td>
        <td width="140"><input type="text" value="${bookadmin.author}" name="author"/></td>
        <td width="140"><input type="text" value="${bookadmin.press}" name="press" /></td>
        <td width="140"><input type="submit" value="添加" /></td>
    </tr>
</table>
</form>
</body>
</html>
﻿
savepage.jsp 添加图书并返回到上边的列表页面
﻿
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<%
    String path = request.getContextPath();
    String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>添加图书</title>
</head>
<body>
<br/>
<form id="saveForm" action="${pageContext.request.contextPath}/a/addBooks" method="post">
    <table  align="center" bgcolor="aqua" border="1" cellpadding="0">
        <tr>
            <td>书名：</td>
            <td><input type="text" value="${bookadmin.bn}" name="bn"/></td>
        </tr>
        <tr>
            <td>作者：</td>
            <td><input type="text" value="${bookadmin.author}" name="author"/></td>
        </tr>
        <tr>
            <td>出版社：</td>
            <td><input type="text" value="${bookadmin.press}" name="press" /></td>
        </tr>
        <input type="submit" value="添加" />
    </table>
</form>
</body>
</html>
﻿
updatepage.jsp 更新和修改图书信息
﻿
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<%
    String path = request.getContextPath();
    String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort()
            + path + "/";
%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>更新&修改 图书信息</title>
</head>
<body>
<h2>编辑图书信息！</h2>
<form id="updateForm" action="${pageContext.request.contextPath}/a/update" method="post">
    <input type="hidden" value="${bookadmin.bid}" name="bid"/>
    <table  align="center" bgcolor="aqua" border="1" cellpadding="0">
        <tr>
            <td>书名：</td>
            <td><input type="text" value="${bookadmin.bn}" name="bn"/></td>
        </tr>
        <tr>
            <td>作者：</td>
            <td><input type="text" value="${bookadmin.author}" name="author"/></td>
        </tr>
        <tr>
            <td>出版社：</td>
            <td><input type="text" value="${bookadmin.press}" name="press"/></td>
        </tr>
        <input type="submit" value="更新" />
    </table>
</form>
</body>
</html>
﻿
然后可以在idea里开一个tomcat来启动项目，实现简单的增删改查功能。
﻿
访问http://localhost:8080/springbook_war_exploded/a/listBooks就得到页面：
﻿
项目上传到了Github方便查看：https://github.com/finch-xu/springbook/tree/0.9 有用的话欢迎加星。
﻿
转载需注明本文地址：https://my.oschina.net/finchxu/blog/3007984
﻿
感谢：
﻿
controller的详细讲解：https://www.cnblogs.com/pophope/p/5619504.html
﻿
https://blog.csdn.net/Peng_Hong_fu/article/details/53536862
﻿
https://www.javatpoint.com/spring-mvc-crud-example
﻿
https://www.journaldev.com/3531/spring-mvc-hibernate-mysql-integration-crud-example-tutorial
﻿
发布于: 2020 年 05 月 01 日阅读数: 50
原文链接:【http://xie.infoq.cn/article/795b10ca40628f93936d1ed42】。
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idea+spring4+springmvc+mybatis+maven 实现简单增删改查 CRUD

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