异常出力，及统一返回

Author: waylau

samples/blog-user/build.gradle

@@ -74,6 +74,9 @@ dependencies {
 	// 添加   Thymeleaf Spring Security 依赖，与 Thymeleaf 版本一致都是 3.x
 	compile('org.thymeleaf.extras:thymeleaf-extras-springsecurity4:3.0.2.RELEASE')
 
+	// 添加  Apache Commons Lang 依赖
+	compile('org.apache.commons:commons-lang3:3.5')
+	
 	// 该依赖对于编译测试是必须的，默认包含编译产品依赖和编译时依
 	testCompile('org.springframework.boot:spring-boot-starter-test')
 

samples/blog-user/src/main/java/com/waylau/spring/boot/blog/controller/UserController.java

@@ -3,6 +3,8 @@
 import java.util.ArrayList;
 import java.util.List;
 
+import javax.validation.ConstraintViolationException;
+
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.PageRequest;
@@ -24,6 +26,8 @@
 import com.waylau.spring.boot.blog.domain.User;
 import com.waylau.spring.boot.blog.service.AuthorityService;
 import com.waylau.spring.boot.blog.service.UserService;
+import com.waylau.spring.boot.blog.util.ConstraintViolationExceptionHandler;
+import com.waylau.spring.boot.blog.vo.Response;
 
 
 /**
@@ -82,12 +86,17 @@ public ModelAndView createForm(Model model) {
 	 * @return
 	 */
 	@PostMapping
-	public ResponseEntity<User> create(User user, Long authorityId) {
+	public ResponseEntity<Response> create(User user, Long authorityId) {
 		List<Authority> authorities = new ArrayList<>();
 		authorities.add(authorityService.getAuthorityById(authorityId));
 		user.setAuthorities(authorities);
-		userService.saveUser(user);
-		return ResponseEntity.ok().body( user);
+		try {
+			userService.saveUser(user);
+		}  catch (ConstraintViolationException e)  {
+			return ResponseEntity.ok().body(new Response(false, ConstraintViolationExceptionHandler.getMessage(e)));
+		}
+		
+		return ResponseEntity.ok().body(new Response(true, "处理成功", user));
 	}
 
 	/**

samples/blog-user/src/main/java/com/waylau/spring/boot/blog/util/ConstraintViolationExceptionHandler.java

@@ -0,0 +1,34 @@
+/**
+ * 
+ */
+package com.waylau.spring.boot.blog.util;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.validation.ConstraintViolation;
+import javax.validation.ConstraintViolationException;
+
+import org.apache.commons.lang3.StringUtils;
+
+/**
+ * @author Administrator
+ *
+ */
+public class ConstraintViolationExceptionHandler {
+
+	/**
+	 * 获取批量异常信息
+	 * @param e
+	 * @return
+	 */
+	public static String getMessage(ConstraintViolationException e) {
+		List<String> msgList = new ArrayList<>();
+		for (ConstraintViolation<?> constraintViolation : e.getConstraintViolations()) {
+			msgList.add(constraintViolation.getMessage());
+        }
+		String messages = StringUtils.join(msgList.toArray(), ";");
+		return messages;
+	}
+
+}

samples/blog-user/src/main/java/com/waylau/spring/boot/blog/vo/Response.java

@@ -0,0 +1,51 @@
+package com.waylau.spring.boot.blog.vo;
+
+/**
+ * 响应 值对象.
+ * 
+ * @since 1.0.0 2017年4月4日
+ * @author <a href="https://waylau.com">Way Lau</a> 
+ */
+public class Response {
+	
+	
+	private boolean success;
+	private String message;
+	private Object body;
+	
+	/** 响应处理是否成功 */
+	public boolean isSuccess() {
+		return success;
+	}
+	public void setSuccess(boolean success) {
+		this.success = success;
+	}
+	
+	/** 响应处理的消息 */
+	public String getMessage() {
+		return message;
+	}
+	public void setMessage(String message) {
+		this.message = message;
+	}
+	
+	/** 响应处理的返回内容 */
+	public Object getBody() {
+		return body;
+	}
+	public void setBody(Object body) {
+		this.body = body;
+	}
+
+	public Response(boolean success, String message) {
+		this.success = success;
+		this.message = message;
+	}
+	
+	public Response(boolean success, String message, Object body) {
+		this.success = success;
+		this.message = message;
+		this.body = body;
+	}
+
+}

samples/blog-user/src/main/resources/static/js/users/main.js

@@ -50,7 +50,7 @@ $(function() {
 			 success: function(data){
 				 $("#userFormContainer").html(data);
 		     },
-		     error : function() {
+		     error : function(data) {
 		         alert("error");
 		     }
 		 });
@@ -77,9 +77,13 @@ $(function() {
 			 type: 'POST',
 			 data:$('#userForm').serialize(),
 			 success: function(data){
-				 
-				 // 从新刷新主界面
-				 getUersByName(0, _pageSize);
+				 if (data.success) {
+					 // 从新刷新主界面
+					 getUersByName(0, _pageSize);
+				 } else {
+					 alert(data.message);
+				 }
+
 		     },
 		     error : function() {
 		         alert("error");