jquery – 如何将Struts2动作类中的InputStream值传递给jsp页面中的ajax并将值转换为Json数组

我想将json数组从Struts2动作类传递给jsp页面.我正在尝试将数据集作为字符串发送.我想知道的是,我怎样才能在 javascript中读取这些数据.

这是我在动作类中的方法

private InputStream inputStream;

/* getter and setter*/

public String getClientMilestone() throws DAOTransientexception,DBConfigException{
        PaymentscheduleDao paymentscheduleDao = new PaymentscheduleDao();
        List <PaymentMilestone> paymentscheduleInfo = paymentscheduleDao.getClientMilestoneInfo(projectId);
        String result = "[";

        for(int i=0; i<paymentscheduleInfo.size(); i++){

            result += "{"+"'"+"item"+i+"' : {"+ "'"+"milestonename"+ "'"+":"+"'"+paymentscheduleInfo.get(i).getMilestone_name()+"'"+"}"+"},";

        }
        result += "]";
        System.out.println("result is "+result);
        inputStream = new StringBufferInputStream(result);
        return "success";
    }

它打印如下

result is [{'item0' : {'milestonename':'milestone 1'}},{'item1' : {'milestonename':'milestone 2'}}]

在struts.xml

<package name="ClientMilestone" namespace="/" extends="struts-default">
        <action name="getClientMilestone" class="packagename.PaymentscheduleAction" method="getClientMilestone">
            <result name="success" type="stream">
            <param name="contentType">text/html</param>
            <param name="inputName">inputStream</param>
            </result>
            <result name="failure">./LandingPage.jsp</result>
            <result name="error">./Error.jsp</result>
        </action>
    </package>

jsp中的javascript函数

function createOrViewPs() {

    var projectId = document.getElementById("projectId").value;
    $.ajax({ 
        method: "GET",url: "getClientMilestone",data: {"projectId" : projectID},Traditional: true,success:
            function(result){
                var jsonArr = result;

                for (var i=0; i<jsonArr.length; i++)
                    for (var name in jsonArr[i]) {
                        alert("Item name: "+Name);
                        alert("source: "+jsonArr[i][name].milestoneName);
                }
            },error: 
            function(){
                alert("fail");
            }
    });         
}

var jsonArr = JSON.parse(result);
$.each (jsonArr,function(index,value){
  $.each (value,function(key,value){
    console.log("Item name: "+key);
    console.log("source: "+value.milestoneName);
  });
});