<html>
<head>
<script type="text/javascript" src="js/jquery-1.11.3.js">
</script>
<script type="text/javascript">
$(document).ready(function() {
$("#myButton1").click(function() {
$.post("/StudyExample/json/JSONAction.action", {},
function(data,status){
$("#myDiv1").html(data);
});
});
});
$(document).ready(function() {
$("#myButton2").click(function() {
$.post("/StudyExample/JSONAction.action", {},
function(data,status){
$("#myDiv2").html(data);
});
});
});
</script>
</head>
<body>
<div id="myDiv1"><h2>Let AJAX change this text1</h2></div>
<button id="myButton1" type="button">Change Content1</button>
<div id="myDiv2"><h2>Let AJAX change this text2</h2></div>
<button id="myButton2" type="button">Change Content2</button>
</body>
</html>
import java.util.List;
import java.util.Map;
import java.util.HashMap;
import java.util.Arrays;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.http.HttpServletResponse;
import net.sf.json.JSONObject;
import org.apache.struts2.ServletActionContext;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Controller;
import com.opensymphony.xwork2.ActionSupport;
import com.jaeson.hibernatestudy.bean.Address;
import com.jaeson.hibernatestudy.bean.User;
@SuppressWarnings("all")
@Scope("prototype")
@Controller("jsonAction")
public class JSONAction extends ActionSupport {
@Override
public String execute() throws Exception {
map.put("jaeson", new Address("海淀", 100, "1361"));
map.put("chenzq", new Address("昌平", 101, "1352"));
return SUCCESS;
}
/**
* 在调用getWriter之前未设置编码(既调用setContentType或者setCharacterEncoding方法设置编码),
* HttpServletResponse则会返回一个用默认的编码(既ISO-8859-1)的PrintWriter实例。这样就会
* 造成中文乱码。而且设置编码时必须在调用getWriter之前设置,不然是无效的。
*/
public void writeJSON() throws IOException{
HttpServletResponse response=ServletActionContext.getResponse();
response.setContentType("text/html;charset=utf-8");
PrintWriter out = response.getWriter();
/*String jsonString="{\"user\":{\"id\":\"123\",\"name\":\"张三\",\"say\":\"Hello , i am a action to print a json!\",\"password\":\"JSON\"},\"success\":true}";
out.println(jsonString);
out.flush();
out.close();*/
Map<String, User> map = new HashMap<String, User>();
User user1 = new User();
user1.setId("1001");
user1.setUserName("chenzq");
user1.setAddress(new Address("beijing", 100021, "134"));
User user2 = new User();
user2.setId("1002");
user2.setUserName("jaesonchen");
user2.setAddress(new Address("shanghai", 200021, "133"));
map.put("user1", user1);
map.put("user2", user2);
JSONObject json = new JSONObject();
json.accumulate("map", map);
//JSONObject json = JSONObject.fromObject(map);
out.println(json.toString());
out.flush();
out.close();
}
private String fieldString = "String value";
private int fieldInt = 100;
private double fieldDouble = 99.1;
private boolean fieldBoolean = false;
private int[] arrayInt = {101, 102, 103};
private List<String> list = Arrays.asList("Buenos Aires", "Córdoba La", "La Plata");
private Map<String, Address> map = new HashMap<String, Address>();
//field without getter method 不会被序列化
private String fieldNoGetter = "NoGetter value";
public String getFieldString() {
return fieldString;
}
public int getFieldInt() {
return fieldInt;
}
public double getFieldDouble() {
return fieldDouble;
}
public boolean isFieldBoolean() {
return fieldBoolean;
}
public int[] getArrayInt() {
return arrayInt;
}
public List<String> getList() {
return list;
}
public Map<String, Address> getMap() {
return map;
}
/**
public String getFieldNoGetter() {
return fieldNoGetter;
}*/
}
不使用JsonResult的配置：
<action name="JSONAction" class="jsonAction" method="writeJSON" />
使用JsonResult的配置：
<package name="json" extends="json-default" namespace="/json">
<action name="JSONAction" class="jsonAction">
<result type="json">
<!-- 指定内容类型，默认为application/json，IE浏览器会提示下载 -->
<param name="contentType">text/html</param>
<!-- 默认将会序列所有有返回值的getter方法的值，而无论该方法是否有对应属性。
root代表从哪里开始序列化，如果root是对象则会将root对象中所有的getter方法都进行序列化。 -->
<!-- <param name="root">map</param> -->
<!-- 指定是否序列化空的属性，默认为false，序列化空属性，对象为null，string为"" -->
<!-- <param name="excludeNullProperties">true</param> -->
<!-- 这里指定将序列化map中的那些属性 -->
<!-- <param name="includeProperties">userList.*</param> -->
<!-- 这里指定将要从map中排除那些属性，这些排除的属性将不被序列化，一般不与上边的参数配置同时出现。
如果相同属性同时指定exclude和include，则exclude的优先级高，因此不序列化该属性-->
<!-- <param name="excludeProperties">
SUCCESS
</param> -->
</result>
</action>
</package>