spring mvc 返回通过配置ResponseBody返回json格式的数据

学习了spring mvc后,发现spring mvc返回json数据比struts2要方便,使用@ResponseBody就可以了

@ResponseBody

作用:

      该注解用于将Controller的方法返回的对象,通过适当的HttpMessageConverter转换为指定格式后,写入到Response对象的body数据区。

使用时机:

      返回的数据不是html标签的页面,而是其他某种格式的数据时(如json、xml等)使用;


 配置转换器:
 <bean
        class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
        <property name="messageConverters">
            <list>
            	<bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"></bean>
               <!--   <ref bean="mappingJacksonHttpMessageConverter" />-->
            </list>
        </property>
    </bean>

配置完就可以直接使用了

	@ResponseBody
	@RequestMapping(value="findOrder",produces = "application/json;charset=UTF-8" )
	public Map<String, Object> findOrder(HttpServletRequest request,int rows,int page){
		//从会话中获取用户信息
		HttpSession session =  request.getSession();
		//
		CinemaBean cinemaBean = new CinemaBean();
		cinemaBean.setCinemaid(1);
		AdminBean admin = new AdminBean();
		admin.setCinemaBean(cinemaBean);
		List<OrderBean> list = orderService.findOrderByCin(admin.getCinemaBean(),rows, page);
		session.setAttribute("OrderList", list);
		//查找数量
		Long count = orderService.findMoveCount(admin.getCinemaBean());
		//以json格式的形式返回数据到前台easyui控件
		Map<String,Object> result = new HashMap<String, Object>();
		result.put("total", count);
		result.put("rows", list);
		return result;
	}

此时浏览器发出该请求时就返回名为result的json数据

发出请求的页面

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<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE html>
<html>
<head>
	<meta charset="UTF-8">
	<title>电影安排</title>
	<link rel="stylesheet" type="text/css" href="/move/houtai/css/easyui.css">
	<link rel="stylesheet" type="text/css" href="/move/houtai/css/icon.css">
	<link rel="stylesheet" type="text/css" href="/move/houtai/css/demo.css">
	<script type="text/javascript" src="/move/houtai/js/jquery.min.js"></script>
	<script type="text/javascript" src="/move/houtai/js/jquery.easyui.min.js"></script>
</head>
<body>
	<div style="margin-left:250px;">
	<div style="margin:20px 0;"></div>
	
		<div style="margin:20px 0;"></div>
	
	<table id="dg" class="easyui-datagrid" title="电影排片查看(默认显示前面十条数据)" style="width:900px;height:250px"
			data-options="rownumbers:true,singleSelect:true,pagination:true,url:'/move/order/findOrder.do',method:'get'">
		<thead>
			
		</thead>
	</table>
    </div>
</body>
</html>
<script>
		$('#dg').datagrid({
	     url : '/move/order/findOrder.do', 
	    columns:[[
			{field:'user',title:'下单者',width:150,formatter:function(value,rowData,rowIndex){  
					return rowData.user.username;  
			}},
			{field:'moveArrang',title:'电影名称',width:150,formatter:function(value,rowData,rowIndex){  
					return rowData.moveArrang.move.name;  
			}},
			{field:'date',title:'上映时间',width:200,formatter: formatDatebox, editor: 'datebox', sortable: true,},  
	        {field:'total',title:'价格(元)',width:70},
	        {field:'state',title:'下单状态(0:未付,1:已付)',width:130},
	       
	        {field:'telephoto',title:'取票手机号',width:165}
	    ]]
	});
		$(function(){
			var pager = $('#dg').datagrid().datagrid('getPager');	// get the pager of datagrid
			
			pager.pagination({
				 pageSize:5,  //每页显示的记录条数,默认为10
       			 pageList : [ 5, 10, 15 ],//可以设置每页记录条数的列表
       			 beforePageText: '第',//页数文本框前显示的汉字    
                 afterPageText: '页    共 {pages} 页',    
                 displayMsg: '当前显示 {from} - {to} 条记录   共 {total} 条记录' ,
                
				buttons:[{
					iconCls:'icon-remove',
					handler:function(){
						var row = $('#dg').datagrid('getSelected');
						 if(confirm("你确定删除该条订单记录吗?")) {
						            //如果是true ,那么就把页面转向thcjp.cnblogs.com
						        location.href="/move/houtai/deleteMoveArrange.html?marrangeid="+row.marrangeid;
						     }
						    else{
						        //否则说明下了,赫赫
						      //alert("你按了取消,那就是返回false");
						    }
					}
				},{
					iconCls:'icon-print',
					handler:function(){
						 if(confirm("你确定导出该页订单数据为Excel")) {
					            //如果是true ,那么就把页面转向thcjp.cnblogs.com
							 window.location.href="/move/order/orderExcel.html"
					     }
					    else{
					        //否则说明下了,赫赫
					      //alert("你按了取消,那就是返回false");
					    }
						
						
						
					}
				},{
					iconCls:'icon-add',
					handler:function(){
						window.location.href="/move/houtai/addMoveArrange.html"
					}
				},{
					iconCls:'icon-edit',
					handler:function(){
						
				    var row = $('#dg').datagrid('getSelected');
    					if (row){
    						
    						window.location.href="/move/houtai/moveArrange.html?marrangeid="+row.marrangeid
                      }else{
                    	  alert("请选择一行数据!");
                      }
					}
				}]
			});			
		})

		
	//easyui转换时间格式
	function formatDatebox(value) {
		if (value == null || value == '') {
			return '';
		}
		var dt;
		if (value instanceof Date) {
			dt = value;
		} else {
			dt = new Date(value);
			if (isNaN(dt)) {
				value = value.replace(/\/Date(−?\d+)\//, '$1'); //标红的这段是关键代码,将那个长字符串的日期值转换成正常的JS日期格式  
				dt = new Date();
				dt.setTime(value);
			}
		}

		return dt.format("yyyy-MM-dd hh:mm"); //这里用到一个javascript的Date类型的拓展方法,这个是自己添加的拓展方法,在后面的步骤3定义  
	}

	$.extend($.fn.datagrid.defaults.editors, {
		datebox : {
			init : function(container, options) {
				var input = $('').appendTo(container);
				input.datebox(options);
				return input;
			},
			destroy : function(target) {
				$(target).datebox('destroy');
			},
			getValue : function(target) {
				return $(target).datebox('getValue');
			},
			setValue : function(target, value) {
				$(target).datebox('setValue', formatDatebox(value));
			},
			resize : function(target, width) {
				$(target).datebox('resize', width);
			}
		}
	});

	Date.prototype.format = function(format) {
		var o = {
			"M+" : this.getMonth() + 1, //month   
			"d+" : this.getDate(), //day   
			"h+" : this.getHours(), //hour   
			"m+" : this.getMinutes(), //minute   
			"s+" : this.getSeconds(), //second   
			"q+" : Math.floor((this.getMonth() + 3) / 3), //quarter   
			"S" : this.getMilliseconds()
		//millisecond   
		}
		if (/(y+)/.test(format))
			format = format.replace(RegExp.$1, (this.getFullYear() + "")
					.substr(4 - RegExp.$1.length));
		for ( var k in o)
			if (new RegExp("(" + k + ")").test(format))
				format = format.replace(RegExp.$1, RegExp.$1.length == 1 ? o[k]
						: ("00" + o[k]).substr(("" + o[k]).length));
		return format;
	}
</script>


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转载自blog.csdn.net/dailingnan0827/article/details/54928552