jQueryEasyUI
- jQuery EasyUI是一组基于jQuery的UI插件集合体，而jQuery EasyUI的目标就是帮助web开发者更轻松的打造出功能丰富并且美观的UI界面。
- 开发者不需要编写复杂的javascript，也不需要对css样式有深入的了解，开发者需要了解的只有一些简单的html标签。
案例使用EasyUI插件
- datagrid：向用户展示列表数据。
- dialog：创建或编辑一条单一的用户信息。
- form：用于提交表单数据。
- messager：显示一些操作信息。
对user表进行CRUD，分页，简单查询
- 列表
这里写图片描述 - 新增
这里写图片描述 - 修改
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项目图片
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初始化类InitApplicationListener
在启动服务器的时候，插入默认数据
package com.jege.spring.boot.controller;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationListener;
import org.springframework.context.event.ContextRefreshedEvent;
import org.springframework.stereotype.Component;
import com.jege.spring.boot.data.jpa.entity.User;
import com.jege.spring.boot.data.jpa.repository.UserRepository;
/**
* @author JE哥
* @email [email protected]
* @description:spring的事件监听器的处理机制：在启动服务器的时候，插入默认数据
*/
@Component
public class InitApplicationListener implements ApplicationListener {
@Override
public void onApplicationEvent(ContextRefreshedEvent event) {
ApplicationContext context = event.getApplicationContext();
UserRepository userRepository = context.getBean("userRepository", UserRepository.class);
for (int i = 1; i < 21; i++) {
User user = new User("user" + i, 25 + i);
userRepository.save(user);
}
}
}
全局异常处理CommonExceptionAdvice
package com.jege.spring.boot.exception;
import java.util.Set;
import javax.validation.ConstraintViolation;
import javax.validation.ConstraintViolationException;
import javax.validation.ValidationException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.dao.DataIntegrityViolationException;
import org.springframework.http.HttpStatus;
import org.springframework.http.converter.HttpMessageNotReadableException;
import org.springframework.validation.BindException;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.HttpMediaTypeNotSupportedException;
import org.springframework.web.HttpRequestMethodNotSupportedException;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.MissingServletRequestParameterException;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.ResponseStatus;
import com.jege.spring.boot.json.AjaxResult;
/**
* @author JE哥
* @email [email protected]
* @description:全局异常处理
*/
@ControllerAdvice
@ResponseBody
public class CommonExceptionAdvice {
private static Logger logger = LoggerFactory.getLogger(CommonExceptionAdvice.class);
/**
* 400 - Bad Request
*/
@ResponseStatus(HttpStatus.BAD_REQUEST)
@ExceptionHandler(MissingServletRequestParameterException.class)
public AjaxResult handleMissingServletRequestParameterException(MissingServletRequestParameterException e) {
logger.error("缺少请求参数", e);
return new AjaxResult().failure("required_parameter_is_not_present");
}
/**
* 400 - Bad Request
*/
@ResponseStatus(HttpStatus.BAD_REQUEST)
@ExceptionHandler(HttpMessageNotReadableException.class)
public AjaxResult handleHttpMessageNotReadableException(HttpMessageNotReadableException e) {
logger.error("参数解析失败", e);
return new AjaxResult().failure("could_not_read_json");
}
/**
* 400 - Bad Request
*/
@ResponseStatus(HttpStatus.BAD_REQUEST)
@ExceptionHandler(MethodArgumentNotValidException.class)
public AjaxResult handleMethodArgumentNotValidException(MethodArgumentNotValidException e) {
logger.error("参数验证失败", e);
BindingResult result = e.getBindingResult();
FieldError error = result.getFieldError();
String field = error.getField();
String code = error.getDefaultMessage();
String message = String.format("%s:%s", field, code);
return new AjaxResult().failure(message);
}
/**
* 400 - Bad Request
*/
@ResponseStatus(HttpStatus.BAD_REQUEST)
@ExceptionHandler(BindException.class)
public AjaxResult handleBindException(BindException e) {
logger.error("参数绑定失败", e);
BindingResult result = e.getBindingResult();
FieldError error = result.getFieldError();
String field = error.getField();
String code = error.getDefaultMessage();
String message = String.format("%s:%s", field, code);
return new AjaxResult().failure(message);
}
/**
* 400 - Bad Request
*/
@ResponseStatus(HttpStatus.BAD_REQUEST)
@ExceptionHandler(ConstraintViolationException.class)
public AjaxResult handleServiceException(ConstraintViolationException e) {
logger.error("参数验证失败", e);
Set> violations = e.getConstraintViolations();
ConstraintViolation violation = violations.iterator().next();
String message = violation.getMessage();
return new AjaxResult().failure("parameter:" + message);
}
/**
* 400 - Bad Request
*/
@ResponseStatus(HttpStatus.BAD_REQUEST)
@ExceptionHandler(ValidationException.class)
public AjaxResult handleValidationException(ValidationException e) {
logger.error("参数验证失败", e);
return new AjaxResult().failure("validation_exception");
}
/**
* 405 - Method Not Allowed
*/
@ResponseStatus(HttpStatus.METHOD_NOT_ALLOWED)
@ExceptionHandler(HttpRequestMethodNotSupportedException.class)
public AjaxResult handleHttpRequestMethodNotSupportedException(HttpRequestMethodNotSupportedException e) {
logger.error("不支持当前请求方法", e);
return new AjaxResult().failure("request_method_not_supported");
}
/**
* 415 - Unsupported Media Type
*/
@ResponseStatus(HttpStatus.UNSUPPORTED_MEDIA_TYPE)
@ExceptionHandler(HttpMediaTypeNotSupportedException.class)
public AjaxResult handleHttpMediaTypeNotSupportedException(Exception e) {
logger.error("不支持当前媒体类型", e);
return new AjaxResult().failure("content_type_not_supported");
}
/**
* 500 - Internal Server Error
*/
@ResponseStatus(HttpStatus.OK)
@ExceptionHandler(ServiceException.class)
public AjaxResult handleServiceException(ServiceException e) {
logger.error("业务逻辑异常", e);
return new AjaxResult().failure("业务逻辑异常：" + e.getMessage());
}
/**
* 500 - Internal Server Error
*/
@ResponseStatus(HttpStatus.OK)
@ExceptionHandler(Exception.class)
public AjaxResult handleException(Exception e) {
logger.error("通用异常", e);
return new AjaxResult().failure("通用异常：" + e.getMessage());
}
/**
* 操作数据库出现异常:名称重复，外键关联
*/
@ResponseStatus(HttpStatus.OK)
@ExceptionHandler(DataIntegrityViolationException.class)
public AjaxResult handleException(DataIntegrityViolationException e) {
logger.error("操作数据库出现异常:", e);
return new AjaxResult().failure("操作数据库出现异常：字段重复、有外键关联等");
}
}
user.jsp页面
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
用户管理
<%@include file="/WEB-INF/page/common.jsp"%>
编号
名称
年龄
其他关联代码
- Spring Boot 菜鸟教程 5 热部署-devtools模块
http://blog.csdn.net/je_ge/article/details/53326525 - Spring Boot 菜鸟教程 2 Data JPA
http://blog.csdn.net/je_ge/article/details/53294949
删除异常运行流程
- 修改UserController.delete,添加int a = 1 / 0;出现通用异常：/ by zero
源码地址
https://github.com/je-ge/spring-boot
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