[extjs] ExtJs4.2 Form 表单提交

基本代码：

<script>

Ext.onReady(function(){

	 Ext.create('Ext.form.Panel', {
		    title: '登录',
		    bodyPadding: 5,
		    width: 350,

		    // 将会通过 AJAX 请求提交到此URL
		    url: '${pageContext.request.contextPath}/back/login.do',

		    // 表单域 Fields 将被竖直排列, 占满整个宽度
		     frame: true,
		     layout:'auto',
		    // The fields
		    defaultType: 'textfield',
		    items: [{
		        fieldLabel: '用户名',
		        name: 'name',
		        allowBlank: false,
				blankText:'用户名不能为空'
		    },{
		        fieldLabel: '密码',
				inputType:'password',
		        name: 'pwd',
		        allowBlank: false,
				blankText:'密码不能为空'

		    },{
		    fieldLabel: '用户类型',
	        name:'type',
	        allowBlank: false,
	        hidden:true, //隐藏组件   默认false
	        value:1//表单默认值
		    }
			],

		    // 重置 和 保存 按钮.
		    buttons: [{
		        text: '重置',
		        handler: function() {
		            this.up('form').getForm().reset();
		        }
		    }, {
		        text: '保存',
		        formBind: true, //only enabled once the form is valid
		        disabled: true,
		        handler: function() {
		            var form = this.up('form').getForm();
		            if (form.isValid()) {
		                form.submit({
		                    success: function(form, action) {
		                       Ext.Msg.alert('提示信息', action.result.restMsg);
		                    },
		                    failure: function(form, action) {
		                        Ext.Msg.alert('提示信息', action.result.restMsg);
		                    }
		                });
		            }
		        }
		    }],
		    renderTo: Ext.getBody()
		});
 });
 </script>

　　没有添加字段校验,验证码，密码加密等,只是纯粹的登录功能的实现，具体细节暂时忽略！

login.do 对应的程序：

    /**
     * 登录
     *
     * @return
     */
    @RequestMapping("/login")
    @ResponseBody
    public void login(@RequestParam String name,@RequestParam String pwd,@RequestParam int type,Writer writer) {
        String valMsg ="";
        try {
            User user = new User();
            user.setUname(name);
            user.setPwd(pwd);
            user.setUtype(type);
            User getUser = userService.queryUser(user);
            if(getUser!=null){
                valMsg=showResultMsg(true, "登录成功");
                //跳转到首页
            }else {
                valMsg=showResultMsg(false, "用户不存在!");
            }
        } catch (Exception e) {
            e.printStackTrace();
            valMsg=showResultMsg(true, "登录失败");
        }finally {
            try {
                writer.write(valMsg);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

返回的结果：

{"result":true,"restMsg":"登录成功!"}