$.ajax({  
        url: '/test/testAction.do?method=test',  
        type: 'POST',  
        dataType: 'json',  
        timeout: 5000,  
        async: false,  
        error: function(){  
          alert('获取数据失败！');  
        },  
        success: function(json){  
          jsObject = eval(json);  
        }  
    });  
    return jsObject;

<span style="font-size: x-small;">$.ajax({ 
        url: '/test/testAction.do?method=test', 
        type: 'POST', 
        dataType: 'json', 
        timeout: 5000, 
        async: false, 
        error: function(){ 
          alert('获取数据失败！'); 
        }, 
        success: function(json){ 
          jsObject = eval(json); 
        } 
    }); 
    return jsObject;</span> 
action：

JSONArray json = JSONArray.fromObject(SysList);//SysList是一个List  
//   设置response的ContentType解决中文乱码  
    response.setContentType("text/html;charset=UTF-8");  
    response.getWriter().print(json.toString());  
    return null; 
Java代码 
<span style="font-size: x-small;">JSONArray json = JSONArray.fromObject(SysList);//SysList是一个List 
//   设置response的ContentType解决中文乱码 
    response.setContentType("text/html;charset=UTF-8"); 
    response.getWriter().print(json.toString()); 
    return null;</span>