情况是这样的：

Action：

public class HomeMemberAction extends ParentAction{

private HomeMember homeMember;

?

//查询方法

public String homeMemberList(){
System.out.println("===" + homeMember.getMemberName());
homeMemberList = this.homeMemberService.getHomeMemberList();
return Action.SUCCESS;
}

?

public HomeMember getHomeMember() {
return homeMember;
}


public void setHomeMember(HomeMember homeMember) {
this.homeMember = homeMember;
}

}

?

配置文件：

<action name="homeMemberList" class="com.issweb.homemember.web.HomeMemberAction" method="homeMemberList">
<result type="json">
<!-- 不序列化Action里为null的字段 -->
<param name="excludeNullProperties">true</param>
<param name="root">homeMemberList</param>
</result>
</action>

?

js：

function loadHomeMemberData(){
//组装参数
var memberName = $("#memberName").val();
var sex = $("#sex").val();
var age = $("#age").val();
var nickName = $("#nickName").val();

//请求后台
$.ajax({
url:"/member/homeMemberList.action",
type:"post",
dataType:"json",
data:{
"homeMember.memberName":memberName,
"homeMember.sex":sex,
"homeMember.age":age,
"homeMember.nickName":nickName
},
beforeSend:function(){
$('#loading').show();//请求之前，展显进度条
},
complete:function(){
$('#loading').hide();//请求之后，隐藏进度条
},
success:createTable
});
}

描述：

ajax提交数据到Action中，如果想让提交的数据自动封装到homeMember 类中，需要在提交的时候，做以下手脚：

data:{
"homeMember.memberName":memberName,
"homeMember.sex":sex,
"homeMember.age":age,
"homeMember.nickName":nickName
},

以Action对象中的属性名字做为前缀。

千万要注意：js中获得参数值方式一定要正确，不然后台获取不到参数，例如：var memberName = $("#memberName").val();

如果写成：var memberName = $("memberName").val(); 前台也不会报错，后台也获取不到值，很不好确定是哪里的原因。