Spring REST API-Validierung
Kommentieren Sie in Spring MVC einfach ein@Valid mit@RequestBody, um den Validierungsprozess auszulösen.
Note
Den vollständigen Quellcode finden Sie unter -Spring Boot Ajax example
P.S Tested with Spring Boot 1.5.1.RELEASE (Spring 4.3.6.RELEASE)
1. JSR 303-Validierung
Fügen Sie JSR303-Anmerkungen zu einer Bean hinzu.
package com.example.model;
import org.hibernate.validator.constraints.NotBlank;
public class SearchCriteria {
@NotBlank(message = "username can't empty!")
String username;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
}
2. @Valid @RequestBody
Bei einer Spring REST-API enthält das Objekt des zweiten ArgumentsErrorsdas Validierungsdetail.
package com.example.controller;
import com.example.model.AjaxResponseBody;
import com.example.model.SearchCriteria;
import com.example.model.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.ResponseEntity;
import org.springframework.validation.Errors;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;
import javax.validation.Valid;
import java.util.List;
import java.util.stream.Collectors;
@RestController
public class SearchController {
@PostMapping("/api/search")
public ResponseEntity search(
@Valid @RequestBody SearchCriteria search, Errors errors) {
Result result = new Result();
//If error, just return a 400 bad request, along with the error message
if (errors.hasErrors()) {
// get all errors
result.setMsg(errors.getAllErrors()
.stream()
.map(x -> x.getDefaultMessage())
.collect(Collectors.joining(",")));
return ResponseEntity.badRequest().body(result);
}
List users = //get users...
if (users.isEmpty()) {
result.setMsg("no user found!");
} else {
result.setMsg("success");
}
result.setResult(users);
return ResponseEntity.ok(result);
}
}