如何通过POST（阿贾克斯）发送JSON数据，并接收来自Struts 2的动作JSON响应 [英] How to send JSON data via POST (ajax) and receive json response from Struts 2 action

问题描述

我想了解如何使用JSON和在这个过程中，我试图从Struts2的行动JSON响应并显示报警响应。对于这个，我使用Ajax POST在JavaScript如下：

 函数checkButtonClick（ID）{

        VAR btnSave ='saveAttendees';
            VAR atNameList = $（'＃attName'+ id）的.VAL（）;
            VAR ptNameList = $（'＃postName'+ id）的.VAL（）;
            变种AID = $（'＃at_id'+ id）的.VAL（）;

            警报（这里）;
            VAR ARR = {buttonName：btnSave，
                    attendeesNameList：atNameList，
                    attendeesPostList：ptNameList，
                    hidden_​​At_id：援助
                    };
            $阿贾克斯（{
                数据：ARR，
                键入：POST，
                数据类型：JSON，
                网址：meeting_record_form

                成功：函数（结果）{
                    警报（result.myMsg）;
              }，
                错误：函数（结果）{
                    警报（错误）;
              }
            }）;
}
 

我的动作类包含一个字符串字段，我想在警报为JSON响应显示。但是，我发现问题这样做。我在想什么或者做错了吗？

我的动作类如下：

 私人字符串myMsg;

    公共字符串getMyMsg（）{
        返回myMsg;
    }

    公共无效setMyMsg（字符串myMsg）{
        this.myMsg = myMsg;
    }

私人字符串updateAttendeesRecord（）{


        meetingRecordService.updateAttendeesRecord（attendeesListMethod（），meeting_record）;
        setMyMsg（更新成功！）;
            返回成功;
    }
 

的struts.xml 文件：

 ＆LT;包名称=默认扩展=支柱默认，JSON-默认＆GT;
    ＆LT;结果类型＆GT;
      ＆LT;结果类型名称=JSON级=org.apache.struts2.json.JSONResult/＆GT;
    ＆LT; /结果类型＆GT;
    ＆LT;拦截＆GT;
      ＆LT;拦截器的名字=JSON级=org.apache.struts2.json.JSONInterceptor/＆GT;
    ＆LT; /拦截＆GT;

    ＆lt;作用NAME =meeting_record_form级=com.task.action.MeetingRecordAction方法=updateAttendeesRecord＆GT;
     ＆LT;结果名称=成功TYPE =json的/＆GT;
    ＆LT; /作用＆gt;
＆LT; /包＆GT;
 

我的pom.xml ：

 ＆LT;依赖＆GT;
    ＆LT;的groupId＆GT; org.apache.struts＆LT; /的groupId＆GT;
    ＆LT; artifactId的＆GT; Struts2的JSON的，插件和LT; / artifactId的＆GT;
    ＆LT;版＆GT; 2.3.15＆LT; /版本＆GT;
＆LT; /依赖性＆GT;
 

解决方案

我通过JSON结果将myMsg解决我的问题。感谢所有帮助

I am trying to understand how to use JSON and in the process I'm trying to get a JSON response from Struts2 action and display an alert for the response. For this I'm using Ajax POST in JavaScript as follows:

function checkButtonClick(id){  

        var btnSave = 'saveAttendees';  
            var atNameList = $('#attName'+id).val();
            var ptNameList = $('#postName'+id).val();
            var aId = $('#at_id'+id).val();

            alert("here");
            var arr = {buttonName:  btnSave,
                    attendeesNameList: atNameList,
                    attendeesPostList: ptNameList,              
                    hidden_At_id: aId
                    };
            $.ajax({                            
                data: arr,
                type: 'POST',
                dataType: 'json',               
                url:"meeting_record_form",

                success:function(result){
                    alert(result.myMsg);
              },
                error:function(result){
                    alert("error");
              }
            });
}

My action class contains a String field that I'm trying to display in alert as JSON response. But I'm finding problem doing this. What am I missing or doing wrong?

My action class is as follows:

private String myMsg;

    public String getMyMsg() {
        return myMsg;
    }

    public void setMyMsg(String myMsg) {
        this.myMsg = myMsg;
    }

private String updateAttendeesRecord() {


        meetingRecordService.updateAttendeesRecord(attendeesListMethod(), meeting_record);
        setMyMsg("Update Successful!");
            return SUCCESS;
    }

struts.xml file:

 <package name="default" extends="struts-default, json-default">
    <result-types>
      <result-type name="json" class="org.apache.struts2.json.JSONResult" />
    </result-types>
    <interceptors>
      <interceptor name="json" class="org.apache.struts2.json.JSONInterceptor" />
    </interceptors>

    <action name="meeting_record_form" class="com.task.action.MeetingRecordAction" method="updateAttendeesRecord">
     <result name="success" type="json" />
    </action>
</package>

My pom.xml:

<dependency>
    <groupId>org.apache.struts</groupId>
    <artifactId>struts2-json-plugin</artifactId>
    <version>2.3.15</version>
</dependency>

解决方案

I've solved my problem by adding myMsg on the json result. Thanks for all the help

这篇关于如何通过POST（阿贾克斯）发送JSON数据，并接收来自Struts 2的动作JSON响应的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！