java JSON Jquery 到 Struts2 动作
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JSON Jquery to Struts2 action
提问by newbie
I want to send my JSON object from Javscript to Struts2 Action.
我想将我的 JSON 对象从 Javscript 发送到 Struts2 Action。
Sample JSON Object
示例 JSON 对象
{
"lists":["list1","list2","list3","list4","list5"],
"maps": {
"key4":"value4","key3":"value3","key5":"value5","key2":"value2","key1":"value1"
},
"number1":123456789,
"numberarray1":[1,2,3,4,5,6,7,8,9],
"string1":"A",
"stringarray1":["A1","B1"]
}
My Jquery Ajax
我的 Jquery Ajax
$.ajax({
type: 'POST',
url: 'json/JSON.action',
data: JSON.stringify(data),
dataType: 'json',
async: false ,
contentType: 'application/json; charset=utf-8',
success: function(){window.alert('Done');}
});
Struts.xml config
Struts.xml 配置
<action name="JSON" class="com.actions.json.JsonAction" method="getJSON">
<result type="json"/>
</action>
My Action Class
我的行动课
public class JsonAction extends ActionSupport {
private String data;
public String getJSON() {
return ActionSupport.SUCCESS;
}
public String getData() {
return data;
}
public void setData(String data) {
this.data = data;
}
}
My Problem is how to receive the JSON Object in Action Class.
我的问题是如何在操作类中接收 JSON 对象。
NOTE: POST OF JSON object is successful.. I just don't know how to receive it via Action Class.. PLEASE HELP Thank you
注意：POST OF JSON 对象是成功的.. 我只是不知道如何通过 Action Class 接收它.. 请帮助谢谢
采纳答案by Ashish Gupta
- There is a typo in your
struts.xmlentry - Have you defined tiles result and interceptor in
struts.xml. Please see this link - The json you are sending to the server, doesn't contain any
datakey. So it will be always null. Since json is denoted as objects. You need to convert JSON into Java objects in this way.
- 您的
struts.xml输入有错别字 - 您是否在
struts.xml. 请看这个链接 - 您发送到服务器的 json 不包含任何
data密钥。所以它将始终为空。由于 json 被表示为对象。您需要通过这种方式将 JSON 转换为 Java 对象。
Approach 1.
方法一。
Create setters for lists,maps,number1,numberarray1,string1and so on. In the top of this link, is defined the way to do it. Then you can access all the variables in this way.
创建 setterlists,maps,number1,numberarray1,string1等等。在此链接的顶部，定义了执行此操作的方法。然后你可以通过这种方式访问所有变量。
Approach 2.In your javascript define a new object.
方法 2.在您的 javascript 中定义一个新对象。
var sentData ={};
sentData ["sentData "] = data;
// And in your ajax call ,
data: JSON.stringify(sentData),
And in your action class, create getters and setters for this.
在您的操作类中，为此创建 getter 和 setter。
Map<K.V> sentData = new HashMap<K,V>();
This will give you whole json object as a Map.
这将为您提供整个 json 对象作为 Map。
