SpringBoot接收参数的19种方式，超详细！ |
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SpringBoot接收参数的19种方式，超详细！
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1. Get 请求 1.1 以方法的形参接收参数 1.这种方式一般适用参数比较少的情况 @RestController @RequestMapping("/user") @Slf4j public class UserController { @GetMapping("/detail") public Result getUserDetail(String name,String phone) { log.info("name:{}",name); log.info("phone:{}",phone); return Result.success(null); } } 2.参数用 @RequestParam 标注，表示这个参数需要必传，否则会报错。 @RestController @RequestMapping("/user") @Slf4j public class UserController { @GetMapping("/detail") public Result getUserDetail(@RequestParam String name,@RequestParam String phone) { log.info("name:{}",name); log.info("phone:{}",phone); return Result.success(null); } } 1.2 以实体类接收参数@RestController
@RequestMapping("/user")
@Slf4j
public class UserController {
@GetMapping("/detail")
public Result getUserDetail(User user) {
log.info("name:{}",user.getName());
log.info("phone:{}",user.getPhone());
return Result.success(null);
}
}
  注：Get 请求以实体类接收参数时，不能用 RequestParam 注解进行标注，因为不支持这样的方式获取参数。  1.3 通过 HttpServletRequest 接收参数@RestController
@RequestMapping("/user")
@Slf4j
public class UserController {
@GetMapping("/detail")
public Result getUserDetail(HttpServletRequest request) {
String name = request.getParameter("name");
String phone = request.getParameter("phone");
log.info("name:{}",name);
log.info("phone:{}",phone);
return Result.success(null);
}
}
 1.4 通过 @PathVariable 注解接收参数@RestController
@RequestMapping("/user")
@Slf4j
public class UserController {
@GetMapping("/detail/{name}/{phone}")
public Result getUserDetail(@PathVariable String name,@PathVariable String phone) {
log.info("name:{}",name);
log.info("phone:{}",phone);
return Result.success(null);
}
}
  1.5 接收数组参数@RestController
@RequestMapping("/user")
@Slf4j
public class UserController {
@GetMapping("/detail")
public Result getUserDetail(String[] names) {
Arrays.asList(names).forEach(name->{
System.out.println(name);
});
return Result.success(null);
}
}
  1.6 接收集合参数springboot 接收集合参数，需要用 RequestParam 注解绑定参数，否则会报错！！ @RestController @RequestMapping("/user") @Slf4j public class UserController { @GetMapping("/detail") public Result getUserDetail(@RequestParam List names) { names.forEach(name->{ System.out.println(name); }); return Result.success(null); } }2. Post 请求 2.1 以方法的形参接收参数@RestController
@RequestMapping("/user")
@Slf4j
public class UserController {
@PostMapping("/save")
public Result getUserDetail(String name,String phone) {
log.info("name:{}",name);
log.info("phone:{}",phone);
return Result.success(null);
}
}
  注：和 Get 请求一样，如果方法形参用 RequestParam 注解标注，表示这个参数需要必传。 2.2 通过 param 提交参数，以实体类接收参数@RestController @RequestMapping("/user") @Slf4j public class UserController { @PostMapping("/save") public Result getUserDetail(User user) { log.info("name:{}",user.getName()); log.info("phone:{}",user.getPhone()); return Result.success(null); } }  注：Post 请求以实体类接收参数时，不能用 RequestParam 注解进行标注，因为不支持这样的方式获取参数。  2.3 通过 HttpServletRequest 接收参数@RestController
@RequestMapping("/user")
@Slf4j
public class UserController {
@PostMapping("/save")
public Result getUserDetail(HttpServletRequest httpServletRequest) {
log.info("name:{}",httpServletRequest.getParameter("name"));
log.info("phone:{}",httpServletRequest.getParameter("phone"));
return Result.success(null);
}
}
2.4 通过 @PathVariable 注解进行接收@RestController
@RequestMapping("/user")
@Slf4j
public class UserController {
@PostMapping("/save/{name}")
public Result getUserDetail(@PathVariable String name) {
log.info("name:{}",name);
return Result.success(null);
}
}
  2.5 请求体以 form-data 提交参数，以实体类接收参数form-data 是表单提交的一种方式，比如常见的登录请求。 @RestController @RequestMapping("/user") @Slf4j public class UserController { @PostMapping("/save") public Result getUserDetail(User user) { log.info("name:{}",user.getName()); log.info("phone:{}",user.getPhone()); return Result.success(null); } }  2.6 请求体以 x-www-form-urlencoded 提交参数，以实体类接收参数x-www-form-urlencoded 也是表单提交的一种方式，只不过提交的参数被进行了编码，并且转换成了键值对。 例如你用form-data 提交的参数： name: 知否君 age: 22用 x-www-form-urlencoded 提交的参数： name=%E5%BC%A0%E4%B8%89&age=22 @RestController @RequestMapping("/user") @Slf4j public class UserController { @PostMapping("/save") public Result getUserDetail(User user) { log.info("name:{}",user.getName()); log.info("phone:{}",user.getPhone()); return Result.success(null); } } 2.7 通过 @RequestBody 注解接收参数注：RequestBody 注解主要用来接收前端传过来的 body 中 json 格式的参数。 2.7.1 接收实体类参数@RestController @RequestMapping("/user") @Slf4j public class UserController { @PostMapping("/save") public Result getUserDetail(@RequestBody User user) { log.info("name:{}",user.getName()); log.info("phone:{}",user.getPhone()); return Result.success(null); } }  2.7.2 接收数组和集合接收数组 @RestController @RequestMapping("/user") @Slf4j public class UserController { @PostMapping("/save") public Result getUserDetail(@RequestBody String[] names) { Arrays.asList(names).forEach(name->{ System.out.println(name); }); return Result.success(null); } }接收集合 @RestController @RequestMapping("/user") @Slf4j public class UserController { @PostMapping("/save") public Result getUserDetail(@RequestBody List names) { names.forEach(name->{ System.out.println(name); }); return Result.success(null); } }  2.8 通过 Map 接收参数1.以 param 方式传参， RequestParam 注解接收参数 @RestController @RequestMapping("/user") @Slf4j public class UserController { @PostMapping("/save") public Result getUserDetail(@RequestParam Map map) { System.out.println(map); System.out.println(map.get("name")); return Result.success(null); } }  2.以 body json 格式传参，RequestBody 注解接收参数 @RestController @RequestMapping("/user") @Slf4j public class UserController { @PostMapping("/save") public Result getUserDetail(@RequestBody Map map) { System.out.println(map); System.out.println(map.get("name")); return Result.success(null); } }  2.9 RequestBody 接收一个参数@RestController
@RequestMapping("/user")
@Slf4j
public class UserController {
@PostMapping("/save")
public Result getUserDetail(@RequestBody String name) {
System.out.println(name);
return Result.success(null);
}
}
  3. Delete 请求 3.1 以 param 方式传参，以方法形参接收参数@RestController
@RequestMapping("/user")
@Slf4j
public class UserController {
@DeleteMapping("/delete")
public Result getUserDetail(@RequestParam String name) {
System.out.println(name);
return Result.success(null);
}
}
  3.2 以 body json 方式传参，以实体类接收参数注：需要用 RequestBody 注解，否则接收的参数为 null @RestController @RequestMapping("/user") @Slf4j public class UserController { @DeleteMapping("/delete") public Result getUserDetail(@RequestBody User user) { System.out.println(user); return Result.success(null); } }  3.3 以 body json 方式传参，以 map 接收参数注：需要用 RequestBody 注解，否则接收的参数为 null @RestController @RequestMapping("/user") @Slf4j public class UserController { @DeleteMapping("/delete") public Result getUserDetail(@RequestBody Map map) { System.out.println(map); return Result.success(null); } } 3.4 PathVariable 接收参数@RestController
@RequestMapping("/user")
@Slf4j
public class UserController {
@DeleteMapping("/delete/{name}")
public Result getUserDetail(@PathVariable String name) {
System.out.println(name);
return Result.success(null);
}
}
 
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