原文链接
1 Get 请求数据
项目地址：https://github.com/Snowstorm0/learn-get-post
1.1 Controller
文件名 MyController，内容为：
@RestController@RequestMapping("/homepage")public class MyController { @Autowired MyService myService;
@GetMapping("/learnGet") public String learnGet(){ return myService.learnGet(); }}
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1.2 Service
文件名 MyService，内容为：
@Service@EnableSchedulingpublic class MyService { public String learnGet(){ Long timeLong = System.currentTimeMillis(); SimpleDateFormat timeFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); //设置格式 String timeString = timeFormat.format(timeLong); return timeString; }}
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1.3 Application
在 application.properties 配置：
1.4 Postman
配置 Get，地址为： http://localhost:8888/homepage/returnTime 。
即可获得当前时间戳。
2 Post 接收数据
项目地址：https://github.com/Snowstorm0/learn-get-post
2.1 Controller
文件名 MyController，内容为：
@RestController@RequestMapping("/homepage")public class MyController { @Autowired MyService myService; @PostMapping("/postReceive") public Map<String, Object> postReceive(@RequestParam("number") int number, @RequestParam("name") String name) { return myService.postReceive(number, name); } @PostMapping("/postReceiveByMap") public Map<String, Object> postReceiveByMap(@RequestParam Map<String, Object> map) { System.out.println("map:" + map + "\n"); return myService.postReceiveByMap(map); }}
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2.2 Service
文件名 MyService，内容为：
@Service@EnableSchedulingpublic class MyService { public Map<String, Object> postReceive(int number, String name){ Map<String, Object> res = new HashMap<>(); res.put("number", number); res.put("name", name); return res; } public Map<String, Object> postReceiveByMap(Map<String, Object> map){ int number = map.get("number") == null ? 0 : Integer.parseInt((String) map.get("number")); String name = map.get("name") == null ? "" : (String)map.get("name"); Map<String, Object> res = new HashMap<>(); res.put("number", number); res.put("name", name); System.out.println("map:" + map + "\n"); System.out.println("res:" + res + "\n"); return res; }
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2.3 Application
在 application.properties 配置：
2.4 Postman
配置 Get，地址为： http://localhost:8888/homepage/returnTime 。
即可获得输出。
3 Post 发送数据
项目地址：https://github.com/Snowstorm0/learn-post-send
需要注意，RestTemplate 在 postForObject 时，用 MultiValueMap，不可使用 HashMap。
3.1 Controller
文件名 MyController，内容为：
@RestController@RequestMapping("/homepage")public class MyController {
@Autowired MyService myService;
@PostMapping("/postSend") public Map<String, Object> postSend() { return myService.postSend(); }}
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3.2 Service
文件名 MyService，内容为：
@Service@EnableSchedulingpublic class MyService { @Resource private RestTemplate restTemplate; String URL = "http://localhost:8888/homepage/postReceiveByMap";
public Map<String, Object> postSend(){ Map<String, Object> sendData = new HashMap<>(); sendData.put("number", 3); sendData.put("name", "张三"); ResponseEntity<ResponseResult> responseData = restTemplate.postForEntity(URL, sendData, ResponseResult.class); Map<String, Object> returnData = new HashMap<>(); returnData.put("StatusCode:", responseData.getStatusCode()); returnData.put("Body:", responseData.getBody()); return returnData; }}
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3.3 ResponseResult
public class ResponseResult {
private int number; private String name;
public ResponseResult(){ }
public int getNumber() { return number; } public void setNumber(int number) { this.number = number; } public String getName() { return name; } public void setName(String name) { this.name = name; }
@Override public String toString() { return "ResponseResult [number=" + number + ",name=" + name + "]"; }}
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3.4 Config
@Configurationpublic class Config { @Bean public RestTemplate restTemplate(RestTemplateBuilder builder){ return builder.build(); }}
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3.5 Application
在 application.properties 配置：
3.6 Postman
配置 Post，地址为： http://localhost:8889/homepage/postSend
即可获得输出。
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