1. JSP页面中将对象转换为JSON字符串提交

1.1 创建JSP文件（convertObject2Json.jsp）

<%@ page language="java" import="java.util.*" pageEncoding="utf-8" %><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><script type="text/javascript" src="../../js/json2.js"></script><script type="text/javascript">function ajaxTransferText(){var BigText = document.getElementById("BigText").value;var ajaxTransferObjectRef = new ajaxTransferObject("张三", "密码11", 10, BigText);var JSONString = JSON.stringify(ajaxTransferObjectRef);if (window.ActiveXObject) {myAjaxObject = new ActiveXObject("Microsoft.XMLHTTP");}else {myAjaxObject = new XMLHttpRequest();}var urlString = "jsonString=" + JSONString;alert(urlString);myAjaxObject.open("POST", "postJson.action"+"?timestamp=" + new Date().getTime(), true);myAjaxObject.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");myAjaxObject.send(urlString);}function ajaxTransferObject(username, password, age, BigText){this.username = username;this.password = password;this.age = age;this.BigText = BigText;}</script></head><body><textarea name="textarea" id="BigText" cols="45" rows="5">需要提交的信息主体...</textarea><br/><input type="button" value="提交试试" onclick="ajaxTransferText()"/></body>
</html>

1.2 创建后台处理Action类

package com.clzhang.ssh.demo6;import net.sf.json.JSONObject;import com.opensymphony.xwork2.ActionSupport;/*** 获取前台提交的JSON数据* @author Administrator**/
public class PostJSONAction extends ActionSupport {public static final long serialVersionUID = 1;private String jsonString;public String getJsonString() {return jsonString;}public void setJsonString(String jsonString) {this.jsonString = jsonString;}public String execute() {System.out.println(jsonString);JSONObject json = JSONObject.fromObject(jsonString);System.out.println("username=" + json.get("username"));System.out.println("username=" + json.get("password"));System.out.println("username=" + json.get("age"));System.out.println("username=" + json.get("BigText"));return null;}
}

1.3 修改配置文件struts.xml

        <action name="postJson" class="com.clzhang.ssh.demo6.PostJSONAction"></action>

1.4 测试

打开IE，输入地址：http://127.0.0.1:8080/st/ssh/demo6/convertObject2Json.jsp

结果如下：

确定后，后台显示：

2. JSP页面获取后台Response返回的JSON对象

2.1 创建JSP文件（getJsonFromResp.jsp）

<%@ page language="java" import="java.util.*" pageEncoding="utf-8" %><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><script type="text/javascript" src="../../js/json2.js"></script><script type="text/javascript">var myAjaxObject;//在List中存字符串function getListString(){if (window.ActiveXObject) {myAjaxObject = new ActiveXObject("Microsoft.XMLHTTP");}else {myAjaxObject = new XMLHttpRequest();}myAjaxObject.open("GET", "getJson!listString.action?date=" + new Date().getTime(), true);myAjaxObject.onreadystatechange = retrunListString;myAjaxObject.send();}function retrunListString(){if (myAjaxObject.readyState == 4) {if (myAjaxObject.status == 200) {var returnJSONString = myAjaxObject.responseText;var returnJSON = JSON.parse(returnJSONString);var showString = "";for (var i = 0; i < returnJSON.length; i++) {showString = showString + returnJSON[i] + " ";}alert(showString);}}}//在List中存Bean            function getListBean(){if (window.ActiveXObject) {myAjaxObject = new ActiveXObject("Microsoft.XMLHTTP");}else {myAjaxObject = new XMLHttpRequest();}myAjaxObject.open("GET", "getJson!listBean.action?date=" + new Date().getTime(), true);myAjaxObject.onreadystatechange = retrunListBean;myAjaxObject.send();}function retrunListBean(){if (myAjaxObject.readyState == 4) {if (myAjaxObject.status == 200) {var returnJSONString = myAjaxObject.responseText;var returnJSON = JSON.parse(returnJSONString);var showString = "";for (var i = 0; i < returnJSON.length; i++) {showString = showString + returnJSON[i].username + " " + returnJSON[i].password + " " + returnJSON[i].age + " " + returnJSON[i].createDate + "\n";}alert(showString);}}}//在Map中存字符串            function getMapString(){if (window.ActiveXObject) {myAjaxObject = new ActiveXObject("Microsoft.XMLHTTP");}else {myAjaxObject = new XMLHttpRequest();}myAjaxObject.open("GET", "getJson!mapString.action?date=" + new Date().getTime(), true);myAjaxObject.onreadystatechange = retrunMapString;myAjaxObject.send();}function retrunMapString(){if (myAjaxObject.readyState == 4) {if (myAjaxObject.status == 200) {var returnJSONString = myAjaxObject.responseText;var returnJSON = JSON.parse(returnJSONString);var showString = "";for (var i in returnJSON[0]) {showString = showString + "key=" + i + " value=" + returnJSON[0][i] + "\n";}alert(showString);}}}//在Map中存Bean            function getMapBean(){if (window.ActiveXObject) {myAjaxObject = new ActiveXObject("Microsoft.XMLHTTP");}else {myAjaxObject = new XMLHttpRequest();}myAjaxObject.open("GET", "getJson!mapBean.action?date=" + new Date().getTime(), true);myAjaxObject.onreadystatechange = retrunMapBean;myAjaxObject.send();}function retrunMapBean(){if (myAjaxObject.readyState == 4) {if (myAjaxObject.status == 200) {var returnJSONString = myAjaxObject.responseText;var returnJSON = JSON.parse(returnJSONString);var showString = "";for (var i in returnJSON[0]) {showString = showString + "key=" + i + " username=" + returnJSON[0][i].username + " password=" + returnJSON[0][i].password + " age=" + returnJSON[0][i].age + " createDate=" + returnJSON[0][i].createDate + "\n";}alert(showString);}}}</script></head><body><input type="button" value="返回List中存String类型的JSON" onclick="getListString()"/><br/><br/><input type="button" value="返回List中存Bean类型的JSON" onclick="getListBean()"/><br/><br/><input type="button" value="返回Map中存String类型的JSON" onclick="getMapString()"/><br/><br/><input type="button" value="返回Map中存Bean类型的JSON" onclick="getMapBean()"/><br/></body>
</html>

View Code

2.2 创建后台处理Action类

package com.clzhang.ssh.demo6;import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.*;import net.sf.json.JSONArray;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionSupport;/*** 返回给前台JSON数据，以四种方式 * @author Administrator**/
public class ReturnJSONAction extends ActionSupport {public static final long serialVersionUID = 1;private List<String> lstString = new ArrayList<String>();public ReturnJSONAction() {lstString.add("你今天吃了吗？");lstString.add("吃了多吃点");lstString.add("没吃回家吃去");lstString.add("好好学习");lstString.add("天天向上");}public String listString() throws IOException {JSONArray json = JSONArray.fromObject(lstString);System.out.println(json.toString());ServletActionContext.getResponse().setContentType("text/html");ServletActionContext.getResponse().setCharacterEncoding("utf-8");ServletActionContext.getResponse().getWriter().printf(json.toString());ServletActionContext.getResponse().getWriter().flush();ServletActionContext.getResponse().getWriter().close();return null;}public String listBean() throws IOException {List<UserInfo> listBean = new ArrayList<UserInfo>();for(String str: lstString) {UserInfo userInfo1 = new UserInfo();userInfo1.setUsername(str);userInfo1.setPassword("P" + Math.random());userInfo1.setAge((int)(Math.random()*10));userInfo1.setCreateDate(new SimpleDateFormat("yyyy-MM-dd hh-mm-ss").format(new Date()));listBean.add(userInfo1);}JSONArray json = JSONArray.fromObject(listBean);System.out.println(json.toString());ServletActionContext.getResponse().setContentType("text/html");ServletActionContext.getResponse().setCharacterEncoding("utf-8");ServletActionContext.getResponse().getWriter().printf(json.toString());ServletActionContext.getResponse().getWriter().flush();ServletActionContext.getResponse().getWriter().close();return null;}public String mapString() throws Exception {LinkedHashMap<String, String> mapString = new LinkedHashMap<String, String>();int count = 1;for(String str: lstString) {mapString.put(""+count++, str+count);}JSONArray json = JSONArray.fromObject(mapString);System.out.println(json.toString());ServletActionContext.getResponse().setContentType("text/html");ServletActionContext.getResponse().setCharacterEncoding("utf-8");ServletActionContext.getResponse().getWriter().printf(json.toString());ServletActionContext.getResponse().getWriter().flush();ServletActionContext.getResponse().getWriter().close();return null;}public String mapBean() throws Exception {LinkedHashMap<String, UserInfo> mapString = new LinkedHashMap<String, UserInfo>();int count = 1;for(String str: lstString) {UserInfo userInfo1 = new UserInfo();userInfo1.setUsername(str);userInfo1.setPassword("P" + Math.random());userInfo1.setAge((int)(Math.random()*10));userInfo1.setCreateDate(new SimpleDateFormat("yyyy-MM-dd hh-mm-ss").format(new Date()));mapString.put(""+count++, userInfo1);}JSONArray json = JSONArray.fromObject(mapString);System.out.println(json.toString());ServletActionContext.getResponse().setContentType("text/html");ServletActionContext.getResponse().setCharacterEncoding("utf-8");ServletActionContext.getResponse().getWriter().printf(json.toString());ServletActionContext.getResponse().getWriter().flush();ServletActionContext.getResponse().getWriter().close();return null;}public String execute() throws IOException {return null;}
}

View Code

2.3 修改配置文件struts.xml

        <action name="getJson" class="com.clzhang.ssh.demo6.ReturnJSONAction"></action>

2.4 测试

打开IE，输入地址：http://127.0.0.1:8080/st/ssh/demo6/getJsonFromResp.jsp

2.4.1 按下“返回List中存String类型的JSON”按钮

2.4.2 按下“返回List中存Bean类型的JSON”按钮

2.4.3 按下“返回Map中存String类型的JSON”按钮

2.4.4 按下“返回Map中存Bean类型的JSON”按钮

转载于:https://www.cnblogs.com/nayitian/p/3461478.html

struts2：JSON在struts中的应用（JSP页面中将对象转换为JSON字符串提交、JSP页面中获取后台Response返回的JSON对象）...相关推荐

php如何表格中的变为超链接,php中将网址转换为超链接的函数
php中将网址转换为超链接的函数复制代码代码如下: function showtext($text){ $search = array('|(http://[^ ]+)|', '|(https:/ ...
JS前端取得并解析后台服务器返回的JSON数据的方法
摘要:主要介绍:使用eval函数解析JSON数据:$.getJSON()方法获得服务器返回的JSON数据 JavaScript eval() 函数 eval(string) 函数可计算某个字符串,并执 ...
ssm把后端数据传到前端_ssm框架中前端jsp页面的数据除了表单提交以外如何传到后台?...
ssm框架里面,前端页面的数据是怎么绑定的,如果我不用表单提交的话,我该怎么在后台去取值?用表单提交,添加没问题,换成现在的就不行了? ssm框架里面,前端页面的数据是怎么绑定的,如果我不用表单提交的 ...
c语言中将十六进制数转换为十进制数程序,C语言中十六进制转十进制两种实现方法...
C语言中十六进制转十进制两种实现方法 C语言 · 十六进制转十进制问题描述从键盘输入一个不超过8位的正的十六进制数字符串,将它转换为正的十进制数后输出. 注:十六进制数中的10~15分别用大写的英 ...
HTML中将px转换为em的语法,在JavaScript中转换EM为PX（并获得默认字体大小）
CommunityChannel72提出了一个问题:Converting em to px in Javascript (and getting default font size),或许与您遇到的问 ...
ajax spring mvc 接收json数据,easyui ajax请求获取SpringMVC @ResponseBody返回的Json数据为什么非得eval才能通过对象获取值？...
是这样的,问题是不是比较郁闷, Spring代码@RequestMapping(value="/UserModel/createUser.html") @ResponseBody ...
java json转换xml格式_在Java中将JSON对象转换为XML格式？
JSON是一种轻量级的数据交换格式,并且JSON的格式类似于键值对.我们可以使用org.json.XML类将JSONObject转换为XML格式,这提供了将XML文本转换为JSONObject并将JS ...
修改软件服务器json返回数据格式,AngularJS处理服务器端返回的JSON数据的格式问题...
用ng的$http服务发起ajax请求,php返回的JSON数据格式要正确! 一开始我的php页面是这样返回数据的: if($result){ $oid = mysqli_insert_id($con ...
ajax调取json接口,通过 Ajax 调取后台接口将返回的 json 数据绑定在页面上
第一步: 编写基础的 html 框架内容,并引入 jquery: 测试Ajax 第二步: 在 " " 中间插入要点击的按钮和用来显示数据的标签,并编写对应的 function: ...

struts2：JSON在struts中的应用（JSP页面中将对象转换为JSON字符串提交、JSP页面中获取后台Response返回的JSON对象）...