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Structs2 Json Ajax实现

AjaxjsonStrutsWebApache 
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1.建立my.struts2.web.JSONResult(自定义结果类，只要实现com.opensymphony.xwork2.Result接口)
package my.struts2.web;

import java.io.PrintWriter;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.Result;
import com.opensymphony.xwork2.util.ValueStack;
import net.sf.json.JSONArray;

public class JSONResult implements Result{

@Override
public void execute(ActionInvocation invocation) {
try {
ServletActionContext.getResponse().setContentType("text/plain");
PrintWriter responseStream = ServletActionContext.getResponse().getWriter();
ValueStack valueStack = invocation.getStack();
Object jsonModel = valueStack.findValue("jsonModel");
responseStream.println(JSONArray.fromObject(jsonModel));
} catch (Exception e) {
System.out.println(e);
}

}
}

2.structs2 XML配置
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
     <include file="struts-default.xml"/>
     <package name="tutorial"  extends="struts-default"  >
     <result-types>
     <result-type name="jsonResult" 　class="my.struts2.web.JSONResult"/>
     </result-types>
     <default-interceptor-ref name="defaultStack"/>
         <action name="ajaxTest" 　class="my.struts2.web.AjaxTestAction">
             <result type="jsonResult"/>         </action>
     </package>
</struts>

3.建立my.struts2.web.AjaxTestAction类
package my.struts2.web;

import com.opensymphony.xwork2.ActionSupport;

public class AjaxTestAction extends ActionSupport{

public String execute() {
User user = new User();
user.setName("huatu122");
user.setPs("xxxxxx");
setJsonModel(user);
        return "success";
  }
private Object jsonModel;

public Object getJsonModel() {
return jsonModel;
}
public void setJsonModel(Object jsonModel) {
this.jsonModel = jsonModel;
}
}

4.建立my.struts2.web.User

package my.struts2.web;

public class User {
private String name;
   private String ps;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPs() {
return ps;
}
public void setPs(String ps) {
this.ps = ps;
}   
}
5.建立ajaxTest.jsp
<%@ page contentType="text/html; charset=UTF-8" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Structs2 AjaxTest</title>
<script type="text/javascript">
  function ajaxResponse(){
    if(req.readyState==4){
            var myObject = eval('(' + req.responseText + ')');  
            alert("name:"+myObject[0].name);
            alert("ps:"+myObject[0].ps);
        }
  }
  function ajaxPost(callback, url) {
  if (window.XMLHttpRequest){
    req = new XMLHttpRequest();
    req.onreadystatechange = callback;
    req.open("GET", url, true);
    req.send(null);
  }else if (window.ActiveXObject) {
    req = new ActiveXObject("Microsoft.XMLHTTP");
    if (req) {
      req.onreadystatechange = callback;
      req.open("GET", url, true);
      req.send();
    }
  }
}
</script>
</head>
<body onload="ajaxPost(ajaxResponse,'/s2/ajaxTest.action')">
</body>
</html>


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评论
1 楼 cloudbee 2011-09-17  
Nice code. Test passed.
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