Spring Boot 系列教程8-EasyUI-edatagrid扩展

edatagrid扩展组件

• edatagrid组件是datagrid的扩展组件，增加了统一处理CRUD的功能，可以用在数据比较简单的页面。
• 使用的时候需要额外引入jquery.edatagrid.js
• 为了能够把后台自动捕获的异常显示到前台这里必须使用最新版本的jquery.edatagrid.js文件

可以直接在数据表格里面进行CRUD

• 列表
  
  
• 新增
  
  
• 修改
  
  
• 删除
  
  
• 删除异常
  
  

项目图片

AjaxResult.java，改变输出属性适应edatagrid.onError方法

package com.jege.spring.boot.json;

/**
 * @author JE哥
 * @email [e-mail]
 * @description:返回的json对象
 */
public class AjaxResult {
  private static final String OK = "ok";
  private static final String ERROR = "error";

  private boolean isError = false;
  private String msg = OK;

  public AjaxResult success() {
    return this;
  }

  public AjaxResult failure() {
    isError = true;
    msg = ERROR;
    return this;
  }

  public AjaxResult failure(String message) {
    isError = true;
    msg = message;
    return this;
  }

  public boolean getIsError() {
    return isError;
  }

  public void setIsError(boolean isError) {
    this.isError = isError;
  }

  public String getMsg() {
    return msg;
  }

  public void setMsg(String msg) {
    this.msg = msg;
  }

}

CommonExceptionAdvice.jave，修改了返回的http状态

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 [e-mail]
 * @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<ConstraintViolation<?>> 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，有很大的变化

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>用户管理</title>
<%@include file="/WEB-INF/page/common.jsp"%>
<!-- 额外添加的jquery.edatagrid.js -->
<script type="text/javascript" src="${ctx}/static/easyui/jquery.edatagrid.js"></script>
<script type="text/javascript">
    // 页面加载完毕之后才能写jQuery的代码
    $(function() {
        $('#userDatagrid').edatagrid({
            url : '/user/json',
            saveUrl : '/user/save',
            updateUrl : '/user/save',
            destroyUrl : '/user/delete',
            onError : function(index, data) {
                $.messager.alert('错误提示', data.msg, 'error');
            }
        });
    });
</script>
</head>
<body>
    <!-- 数据表格组件 -->
    <table id="userDatagrid" title="用户管理" fit="true" border="false" fitColumns="true" singleSelect="true"
        pagination="true" rownumbers="true" toolbar="#userDatagridToolbar"
        data-options="onSave:function(){
          $('#userDatagrid').edatagrid('reload');
        },
        destroyMsg:{
            norecord:{// 在没有记录选择的时候执行
                title:'警告',
                msg:'没有选择要删除的行!!!'
        },
            confirm:{// 在选择一行的时候执行
              title:'确定',
                msg:'你真的要删除吗?'
            }
        }">
        <thead>
            <tr>
                <th data-options="field:'id',hidden:true">编号</th>
                <th field="name" width="50" sortable="true" editor="{type:'validatebox',options:{required:true}}">名称</th>
                <th field="age" width="50" sortable="true"
                    editor="{type:'numberbox',options:{required:true,min:20,max:80,precision:0}}">年龄</th>
            </tr>
        </thead>
    </table>
    <!-- 数据表格组件工具栏 -->
    <div class="easyui-layout" fit="true">
        <div id="userDatagridToolbar" region="north" border="false"
            style="border-bottom: 1px solid #ddd; height: 32px; padding: 2px 5px; background: #fafafa;">
            <div style="float: left;">
                <a href="javascript:;" onclick="javascript:$('#userDatagrid').edatagrid('addRow')"
                    class="easyui-linkbutton c1" iconCls="icon-add">添加</a> <a href="javascript:;"
                    onclick="javascript:$('#userDatagrid').edatagrid('saveRow')" class="easyui-linkbutton c2"
                    iconCls="icon-save">保存</a> <a href="javascript:;"
                    onclick="javascript:$('#userDatagrid').edatagrid('destroyRow')" class="easyui-linkbutton c3"
                    iconCls="icon-remove">删除</a> <a href="javascript:;"
                    onclick="javascript:$('#userDatagrid').edatagrid('cancelRow')" class="easyui-linkbutton c4"
                    iconCls="icon-cancel">取消</a><a href="javascript:;"
                    onclick="javascript:$('#userDatagrid').edatagrid('reload')" class="easyui-linkbutton c5"
                    iconCls="icon-reload">刷新</a>
            </div>
            <div style="float: right">
                <form method="post">
                    关键字：<input name="q" size="10" /> <a href="javascript:;"
                        onclick="javascript:$('#userDatagrid').edatagrid('load', {q : $('input[name=q]').val()});"
                        class="easyui-linkbutton c5" iconCls="icon-search">搜索</a>
                </form>
            </div>
        </div>
    </div>
</body>
</html>

其他关联代码

• Spring Boot 系列教程7-EasyUI-datagrid
  
  http://blog.****.net/je_ge/article/details/53365189
• Spring Boot 系列教程5-热部署-devtools模块
  
  http://blog.****.net/je_ge/article/details/53326525
• Spring Boot 系列教程2-Data JPA
  
  http://blog.****.net/je_ge/article/details/53294949

删除异常运行流程

• 修改UserController.delete,添加int i = 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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