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Ext Login,服务端返回后出现页面脚本错误

EXT脚本jsonJavaScriptCSS 
阅读更多

先看下页面....

<%@ page contentType="text/html;charset=GBK" pageEncoding="GBK" %>


<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>extDemo</title>
<link rel="stylesheet" type="text/css" href="<%=request.getContextPath() %>/js/ext-2.2/resources/css/ext-all.css" />
<script type="text/javascript" src="<%=request.getContextPath() %>/js/ext-2.2/adapter/ext/ext-base.js"></script>
<script type="text/javascript" src="<%=request.getContextPath() %>/js/ext-2.2/ext-all.js"></script>

</head>
<body>
<script type="text/javascript">
Ext.onReady(
  function(){   
          //使用表单提示
          Ext.QuickTips.init();
          Ext.form.Field.prototype.msgTarget = 'side';
       
          //定义表单
          var simple = new Ext.FormPanel({
            labelWidth: 75,          
            baseCls: 'x-plain',
            defaults: {width: 150},
            defaultType: 'textfield',//默认字段类型
                 
            //定义表单元素
            items: [
             {
                  fieldLabel: 'Username',
                  name: 'name',//元素名称
                  //anchor:'95%',//也可用此定义自适应宽度
                  allowBlank:false,//不允许为空
                  blankText:'Please input your name'//错误提示内容
                },
                {
                   inputType:'password',
                  fieldLabel: 'Password',
                  //anchor:'95%',
                  name: 'pws',
                  allowBlank:false,
                  blankText:'Password is empty'
                }
            ],

            buttons: [{
               text: 'Login',
               type: 'submit',
               //定义表单提交事件
               handler:function(){
                           if(simple.form.isValid()){//验证合法后使用加载进度条
                           Ext.MessageBox.show({
                              title: 'Please wait a moment.',
                              msg: 'Loading...',
                              progressText: '',
                              width:300,
                              progress:true,
                              closable:false,
                              animEl: 'loding'
                           });
                           //控制进度速度
                           var f = function(v){
                            return function(){
                                    var i = v/11;
                                    Ext.MessageBox.updateProgress(i, '');
                                    };
                           };

                           for(var i = 1; i < 13; i++){
                              setTimeout(f(i), i*150);
                           }
                                 
                          //提交到服务器操作
                          simple.form.doAction('submit',{
                            url:'LoginServlet',//文件路径
                            method:'post',//提交方法post或get
                            params:'',
                            //提交成功的回调函数
                            success:function(form,action){
                            alert("in");
                                 if (action.result.msg=='ok') {
                                    document.location='success.jsp';
                                 } else {
                                    Ext.Msg.alert('Login error',action.result.msg);
                                 }
                            },
                            //提交失败的回调函数
                            failure:function(){
                                 Ext.Msg.alert('Error','Server is error！');
                            }
                          });
                        }                                                    
                  }
             },
             {
                text: 'Cancel',
                handler:function(){simple.form.reset();}//重置表单
             }
            ]
         });   
                //定义窗体
               win = new Ext.Window({
                  id:'win',
                  title:'User Login',
                  layout:'fit',   //之前提到的布局方式fit，自适应布局               
                  width:300,
                  height:150,
                  plain:true,
                        bodyStyle:'padding:5px;',
                  maximizable:false,//禁止最大化
                  closeAction:'close',
                  closable:false,//禁止关闭
                  collapsible:true,//可折叠
                  plain: true,
                  buttonAlign:'center',
                  items:simple//将表单作为窗体元素嵌套布局
               });
               win.show();//显示窗体
                              
       });
</script>
</body>
</html>

 

再看下服务端...

package demo;

import java.io.IOException;
import java.sql.ResultSet;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;


public class LoginServlet extends HttpServlet
{
	public void doGet(HttpServletRequest request,HttpServletResponse response)
		throws ServletException,IOException
	{
		response.setContentType("text/html;charset=gb2312");
		request.setCharacterEncoding("gb2312");
		
		try
		{
			String user=request.getParameter("name");
			String pasd=request.getParameter("pws");
			String flag="";
			
			System.out.println("---------------------user:"+user+"----pwd:"+pasd);
			if(user!=null && !"".equals(user)){
				if(pasd!=null && !"".equals(pasd)){
					DBconnection conn = new DBconnection();
					System.out.println("select * from user u where u.username="+user+" and u.password="+pasd);
					ResultSet rs = conn.getResult("select * from user u where u.username='"+user+"' and u.password='"+pasd+"'");
					
					if(rs.next()){
						flag="0";
					}
				}
			}
			System.out.println("------------flag:"+flag);
			if(flag!=null && !"".equals(flag)){
				//json形式返回数据,如何返回???
				String json = "(success:true,msg:\'ok\')";
				response.getWriter().write(json);
			    response.getWriter().flush();
			    System.out.println(json);
				response.sendRedirect("index.jsp");
			}
			else{
				String json = "(success:true,msg:\'Login fail\')";
				response.getWriter().write(json);
			    response.getWriter().flush();
			    System.out.println(json);
				response.sendRedirect("index.jsp");
			}
		}
		catch(Exception ex){
			
		}
	}
	public void doPost(HttpServletRequest request,HttpServletResponse response)
		throws ServletException,IOException
	{
		doGet(request,response);
	}
}

 

 

问题出在从服务端返回客户端时...页面出现脚本错误...指向页面的第24行...少')'号....哪位朋友知道帮帮忙....先谢了..初学Ext,所用API为2.2版本.

 

另外还想问一下,从服务端回显json格式数据时,以什么方式?是用out,还是write还是其它什么? :)

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1 楼 xiao_yi 2008-11-24  
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