struts2 + ajax + form 表单提交的处理，如果不是文件上传的部分，就可以直接用ajax来实现，而不是像之前用iframe来仿ajax数据交互的方法。
用Ajax.Request()方法来实现！！
例子：
前台代码：
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>使用JSON插件</title>
<script type="text/javascript" src="prototype-1.6.0.3.js"></script>
<script type="text/javascript" src="json2.js"></script>
<script type="text/javascript">
function gotClick(){
//请求的地址
var url = 'JSONExample.action';
//将favorite表单域的值转换为请求参数
var params = Form.serialize('form1');
//创建Ajax.Request对象，对应于发送请求
var myAjax = new Ajax.Request(
url,
{
//请求方式：POST
method:'post',
//请求参数
parameters:params,
//指定回调函数
onComplete:processResponse,
//是否异步发送请求
asynchronous:true
});
}
//作为ajax的回调函数
function processResponse(request){
//使用JSON对象将服务器响应解析成JSON对象
var res = JSON.parse(request.responseText);
//遍历JSON对象的每个属性
for(var propName in res){
$("show").innerHTML += propName + " --> " +
res[propName] + "<br />";
}
}
</script>
</head>
<body>
<form id="form1" name="form1" method="post">
field1:<input type="text" name="field1" id="field1" /><br>
field2:<input type="text" name="field2" id="field2" /><br>
field3:<input type="text" name="field3" id="field3" /><br>
<input type="button" value="提交" onclick="gotClick();" />
</form>
<div id="show"></div>
</body>
</html>
后台代码：
package action;
import java.util.HashMap;
import java.util.Map;
import org.apache.struts2.json.annotations.JSON;
import com.opensymphony.xwork2.ActionSupport;
@SuppressWarnings({ "rawtypes", "serial" })
public class JSONExample extends ActionSupport {
//模拟处理结果的属性
private int[] ints = {10,20};
private Map map = new HashMap();
private String customName = "顾客";
//封装请求参数的三个属性
private String field1;
//transient修饰的属性不会被序列化
private transient String field2;
private String field3;
@SuppressWarnings("unchecked")
@Override
public String execute() throws Exception {
map.put("name", "李刚");
return SUCCESS;
}
public int[] getInts() {
System.out.println("getInts()被调用");
return ints;
}
public void setInts(int[] ints) {
System.out.println("setInts()被调用");
this.ints = ints;
}
//使用注释语法来改变该属性序列化后的属性名
@JSON(name="newName")
public Map getMap() {
System.out.println("getMap()被调用");
return map;
}
public void setMap(Map map) {
System.out.println("setMap()被调用");
this.map = map;
}
public String getCustomName() {
System.out.println("getCustomName()被调用");
return customName;
}
public void setCustomName(String customName) {
System.out.println("setCustomName()被调用");
this.customName = customName;
}
public String getField1() {
System.out.println("getField1()被调用");
return field1;
}
public void setField1(String field1) {
System.out.println("setField1()被调用");
this.field1 = field1;
}
public String getField2() {
System.out.println("getField2()被调用");
return field2;
}
public void setField2(String field2) {
System.out.println("setField2()被调用");
this.field2 = field2;
}
// public String getField3() {
// return field3;
// }
//
// public void setField3(String field3) {
// this.field3 = field3;
// }
}
配置struts.xml：
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<constant name="struts.i18n.encoding" value="UTF-8" />
<package name="json" extends="json-default">
<action name="JSONExample" class="action.JSONExample">
<result type="json"></result>
</action>
<action name="">
<result>.</result>
</action>
</package>
</struts>
从而实现ajax的异步数据请求交互。