EXT4提交表单到struts2返回json数据并跳转页面

新手学习ext，提交表单的时候总是不能返回正确的json数据，在网上找了相关资料终于发现了问题，记录下以供大家参考

这里说明下，我用的是ext的form提交，要求必须返回json格式的数据

Ext.require([
'Ext.form.*',
'Ext.layout.container.Absolute',
'Ext.window.Window'
]);

Ext.onReady(function() {
Ext.QuickTips.init();
Ext.form.Field.prototype.msgTarget = 'side';
var form = new Ext.form.Panel({
layout: 'absolute',
defaultType: 'textfield',
border: false,
url: basePath + 'user!login.action',
items: [{
fieldLabel: '用户名',
name: 'user.name',
allowBlank : 'false',
x: 80,
y: 60
},{
fieldLabel: '密码',
name: 'user.password',
allowBlank : 'false',
x: 80,
y: 100
}]
});

new Ext.window.Window({
autoShow: true,
title: '用户登录',
width: 500,
height:300,
minWidth: 300,
minHeight: 200,
layout: 'fit',
plain: true,
closable : false,
dragglable : false,
items: form,

buttons: [{
text: '注册'
},{
text: '登录',
handler : function(){
form.submit({
success: function(form, action) {
if(action.result.success){
                            location.href = basePath + 'app/main.jsp';
                            }
                        },
                        failure: function(form, action) {
                            if(action.result.success == false){
                                Ext.Msg.alert("Failed","登录失败！")
                            }
});
}
}]
});
});

下面是action代码

public class UserAction extends ActionSupport {

private User user;
private UserService userService;
private Map<String,Object> dataMap;

public String login() throws Exception{
dataMap = new HashMap<String, Object>();
if(userService.queryUserInfo(user)){
dataMap.put("success", true);
return "main";
}else{
dataMap.put("success", false);
return "index";
}
}
@JSON(serialize=false)
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
@JSON(serialize=false)
public UserService getUserService() {
return userService;
}
public void setUserService(UserService userService) {
this.userService = userService;
}
public Map<String, Object> getDataMap() {
return dataMap;
}
public void setDataMap(Map<String, Object> dataMap) {
this.dataMap = dataMap;
}

}

把要返回的状态数据放到map里面并生成get set方法，这里struts2会自动把以get开头的方法序列化成json数据，不需要的就在前面加上注解@JSON(serialize=false)，表示不会转成json，在struts.xml做如下配置

<struts>
<package name="json"  extends="struts-default,json-default">
<action name="user" class="userAction">
<result name="main" type="json">
<param name="root">dataMap</param>
</result>
<result name="index" type="json">
<param name="root">dataMap</param>
</result>
</action>

</package>
</struts>

这里name="root"表示从根节点开始， 要返回的json数据在dataMap中