如何更新jsonResponse[Struts2+；Ajax+；Json]_Json_Ajax_Struts2

如何更新jsonResponse[Struts2+；Ajax+；Json]

json ajax struts2

如何更新jsonResponse[Struts2+；Ajax+；Json],json,ajax,struts2,Json,Ajax,Struts2,index.jsp <%@ taglib prefix="s" uri="/struts-tags"%> <html> <head> <title>AJAX in Struts 2 using JSON and jQuery</title> <script src="js/jquery-1.8.2.js" type="text/javascript"></script> <script> $(doc

index.jsp

<%@ taglib prefix="s" uri="/struts-tags"%>
 <html>
<head>
<title>AJAX in Struts 2 using JSON and jQuery</title>
<script src="js/jquery-1.8.2.js" type="text/javascript"></script>
<script>
$(document).ready(function() {

$('#country').change(function(event) {

    var country = $("select#country").val();
    delete {countryName : country};
    $.getJSON('ajaxAction', {
        countryName : country
    }, function(jsonResponse) {
        $('#ajaxResponse').text(jsonResponse.dummyMsg);
        var select = $('#states');
        select.find('option').remove();
        $.each(jsonResponse.stateMap, function(key, value) {
            $('<option>').val(key).text(value).appendTo(select);
        });
    });
    });
});
</script>
</head>
<body>
<h3>AJAX calls to Struts 2 using JSON and jQuery</h3>
<s:select id="country" name="country"
    list="{'Select Country','India','US'}" label="Select Country" />
<br />
<br />
<s:select id="states" name="states" list="{'Select State'}"
    label="Select State" />
<br />
<br />
<div id="ajaxResponse"></div>
</body>
</html>

在“选择国家”的Web UI中：“选择国家”下拉列表中显示以下国家的“印度”：

Kerala  
Tamil Nadu  
Jammu Kashmir 
Assam

现在我正在更改AjaxJsonAction.java，并添加stateMap.put（“5”，“Odisha”）如下所示并再次运行：

package com.action;

import java.util.LinkedHashMap;
import java.util.Map;

import com.opensymphony.xwork2.Action;

public class AjaxJsonAction implements Action{

    private Map<String, String> stateMap = new LinkedHashMap<String, String>();
    private String dummyMsg;
    //Parameter for Jquery
    private String countryName;

    public String execute() {
        System.out.println(countryName);
        if (countryName.equals("India")) {
            System.out.println("hello");
            stateMap.put("1", "Kerala");
            stateMap.put("2", "Tamil Nadu");
            stateMap.put("3", "Jammu Kashmir");
            stateMap.put("4", "Assam");
            stateMap.put("5", "Odisha");          //Newly added State
        } else if (countryName.equals("US")) {
            System.out.println("hello");
            stateMap.put("1", "Georgia");
            stateMap.put("2", "Utah");
            stateMap.put("3", "Texas");
            stateMap.put("4", "New Jersey");
        } else if (countryName.equals("Select Country")) {
            stateMap.put("1", "Select State");
        }
        dummyMsg = "Ajax action Triggered";
        return SUCCESS;
    }

    public Map<String, String> getStateMap() {
        return stateMap;
    }

    public String getDummyMsg() {
        return dummyMsg;
    }

    public String getCountryName() {
        return countryName;
    }

    public void setStateMap(Map<String, String> stateMap) {
        this.stateMap = stateMap;
    }

    public void setDummyMsg(String dummyMsg) {
        this.dummyMsg = dummyMsg;
    }

    public void setCountryName(String countryName) {
        this.countryName = countryName;
    }
}

为什么没有控制台输出，状态“Odisha”没有被添加，正确的添加方式是什么？

/code>
？@Andrea Ligios:我不太明白你想说什么。类型为json
的结果不能返回任何结果jsp@AndreaLigios当前位置但在我的情况下它确实回来了。如果没有，那么它也不会第一次运行。你能建议我做任何代码转换来进行更新吗？你在使用Eclipse吗？@Andrea Ligios:我不太明白你想说什么。类型为json的结果不能返回任何结果jsp@AndreaLigios当前位置但在我的情况下它确实回来了。如果没有，那么它也不会第一次运行。你能建议我做任何代码转换来进行更新吗？你在使用Eclipse吗？
India  
Hello

Kerala  
Tamil Nadu  
Jammu Kashmir 
Assam  

package com.action;

import java.util.LinkedHashMap;
import java.util.Map;

import com.opensymphony.xwork2.Action;

public class AjaxJsonAction implements Action{

    private Map<String, String> stateMap = new LinkedHashMap<String, String>();
    private String dummyMsg;
    //Parameter for Jquery
    private String countryName;

    public String execute() {
        System.out.println(countryName);
        if (countryName.equals("India")) {
            System.out.println("hello");
            stateMap.put("1", "Kerala");
            stateMap.put("2", "Tamil Nadu");
            stateMap.put("3", "Jammu Kashmir");
            stateMap.put("4", "Assam");
            stateMap.put("5", "Odisha");          //Newly added State
        } else if (countryName.equals("US")) {
            System.out.println("hello");
            stateMap.put("1", "Georgia");
            stateMap.put("2", "Utah");
            stateMap.put("3", "Texas");
            stateMap.put("4", "New Jersey");
        } else if (countryName.equals("Select Country")) {
            stateMap.put("1", "Select State");
        }
        dummyMsg = "Ajax action Triggered";
        return SUCCESS;
    }

    public Map<String, String> getStateMap() {
        return stateMap;
    }

    public String getDummyMsg() {
        return dummyMsg;
    }

    public String getCountryName() {
        return countryName;
    }

    public void setStateMap(Map<String, String> stateMap) {
        this.stateMap = stateMap;
    }

    public void setDummyMsg(String dummyMsg) {
        this.dummyMsg = dummyMsg;
    }

    public void setCountryName(String countryName) {
        this.countryName = countryName;
    }
}  

Kerala  
Tamil Nadu  
Jammu Kashmir 
Assam