spring handle validate error msg

Sitrone · Sitrone · commit 2f2e07475345 · 2017-07-09T18:29:42.000+08:00
diff --git a/spring-mvc/web-snippet/src/main/java/com/web/spring/ValidateData.java b/spring-mvc/web-snippet/src/main/java/com/web/spring/ValidateData.java
@@ -0,0 +1,81 @@
+package com.web.spring.databind;
+
+import com.web.spring.databind.domain.ResponseError;
+import com.web.spring.databind.domain.SimpleUser;
+import java.util.List;
+import javax.validation.Valid;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Controller;
+import org.springframework.validation.BindingResult;
+import org.springframework.validation.FieldError;
+import org.springframework.validation.ObjectError;
+import org.springframework.web.bind.MethodArgumentNotValidException;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.ResponseBody;
+import org.springframework.web.bind.annotation.ResponseStatus;
+
+/**
+ * Created by Administrator on 2017/7/9.
+ */
+@Controller
+@RequestMapping(value = "/validate")
+public class ValidateData {
+    /**
+     * TODO http://localhost:18080/validate/user?name=sun&age=27
+     * 使用注解校验返回客户端错误信息
+     */
+    @GetMapping(value = "/user", produces = "application/json")
+    public ResponseEntity getSimpleObject(@Valid SimpleUser user, BindingResult result) {
+        if (result.hasErrors()) {
+            return new ResponseEntity(getFieldErrors(result), HttpStatus.BAD_REQUEST);
+        }
+        return new ResponseEntity(user, HttpStatus.OK);
+    }
+
+//    @ExceptionHandler( value = {MethodArgumentNotValidException.class})
+//    @ResponseStatus(HttpStatus.BAD_REQUEST)
+//    @ResponseBody
+//    public String validationError(MethodArgumentNotValidException ex) {
+//        BindingResult result = ex.getBindingResult();
+//        final List<FieldError> fieldErrors = result.getFieldErrors();
+//        StringBuilder builder = new StringBuilder(256);
+//        for (FieldError fieldError : fieldErrors) {
+//            builder.append("value:")
+//                    .append(fieldError.getField())
+//                    .append(" msg:")
+//                    .append(fieldError.getDefaultMessage())
+//                    .append(" ");
+//        }
+//        return builder.toString();
+//    }
+
+    private String getFieldErrors(BindingResult result) {
+        final List<FieldError> fieldErrors = result.getFieldErrors();
+        StringBuilder builder = new StringBuilder(256);
+        if (result.hasFieldErrors()) {
+            builder.append("Field error:");
+            for (FieldError fieldError : fieldErrors) {
+                builder.append("value:")
+                        .append(fieldError.getField())
+                        .append(" msg:")
+                        .append(fieldError.getDefaultMessage())
+                        .append(" ");
+            }
+            builder.append('\n');
+        }
+        if (result.hasGlobalErrors()) {
+            builder.append("Global error:");
+            for (ObjectError objectError : result.getGlobalErrors()) {
+                builder.append("errorCode:")
+                        .append(objectError.getCode())
+                        .append("msg:")
+                        .append(objectError.getDefaultMessage())
+                        .append(" ");
+            }
+        }
+        return builder.toString();
+    }
+}
