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Ajax当中json的用法
马克- to-win：马克 java社区：防盗版实名手机尾号： 73203。
例 3.1（eval1.html)
<HTML>
<HEAD>
<TITLE>在eclipse中直接open with火狐即可</TITLE>
</HEAD>
<BODY>
<SCRIPT LANGUAGE="JavaScript">
<!--
//例1
var s = "2+41-19";
alert(eval(s));
eval("d =new Date();alert(d.toLocaleString())")
//-->
</SCRIPT>
</BODY>
</HTML>
例 3.2（eval2.html)
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
</HEAD>
<BODY>
<SCRIPT LANGUAGE="JavaScript">
<!--
var user ="{name:'某',sex:'男',age:22}";
var obj = eval("("+user+")"); //多加一对()为语法要求
alert(obj.age);
for(var pro in obj)
{
alert(obj[pro]);
}
//-->
</SCRIPT>
</BODY>
</HTML>
例 3.3（eval3.html)
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
</HEAD>
<BODY>
<SCRIPT LANGUAGE="JavaScript">
<!--
define = "{name:'Michael',email:'17bity@gmail.com'}";
eval("data = "+define);
alert(data.name);
alert(data.email);
//-->
</SCRIPT>
</BODY>
</HTML>
例 3.4
<%@ page language="java" contentType="text/html; charset=gb2312"
%>
<html>
<head>
<title>Insert title here</title>
</head>
<script>
function show(t)
{
var xmlhttp;
try{
xmlhttp=new ActiveXObject("Msxml2.XMLHTTP");
}catch(e){
try{
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}catch(e){
try{
xmlhttp=new XMLHttpRequest();
}catch(e){}
}
}
xmlhttp.open("get","servlet34?id="+t);
xmlhttp.onreadystatechange=function(){
if(xmlhttp.readyState==4)
{
if(xmlhttp.status==200)
{
str = xmlhttp.responseText;
/*about the following part, refer to eval2.html*/
obj= eval("("+str+")");
for(var pro in obj)
{
document.getElementById(pro).innerHTML=obj[pro];
}
}
}
}
xmlhttp.send(null);
}
</script>
<body>
<table width="340" border="1">
<tr>
<td id="1" onclick="show(this.id)">点这1</td>
<td id="2" onclick="show(this.id)">点这2</td>
</tr>
</table>
<table width="340" border="1">
<tr>
<td width="170">参数项</td>
<td width="170">参数值</td>
</tr>
<tr>
<td>型号</td>
<td id="type"> </td>
</tr>
<tr>
<td>price</td>
<td id="price"> </td>
</tr>
</table>
</body>
</html>
package helloWorld;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class servlet34 extends HttpServlet {
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
}
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html;charset=gb2312");
PrintWriter out = response.getWriter();
String id = request.getParameter("id");
System.out.println(id);
StringBuffer sb = new StringBuffer();
sb.append("{");
sb.append("type:'");
sb.append("adsl马克-to-win：" + id + "");
sb.append("',");
sb.append("price:'" + "333mark" + id + "'");
sb.append("}");
System.out.print("sb.toString() is" + sb.toString());
out.print(sb.toString());
}
}
例 3.5
<html>
<head>
<title>Insert title here</title>
</head>
<script>
function show(t) {
var xmlhttp;
try {
xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e) {
try {
xmlhttp = new XMLHttpRequest();
} catch (e) {
}
}
}
xmlhttp.open("get", "servlet35?id=" + t);
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4) {
if (xmlhttp.status == 200) {
str = xmlhttp.responseText;
arr = eval("(" + str + ")");
for ( var i = 0; i < arr.length; i++) {
var obj = arr[i];
for ( var pro in obj) {
document.getElementById(pro).innerHTML = obj[pro];
}
}
}
}
}
xmlhttp.send(null);
}
</script>
<body>
<table width="340" border="1">
<tr>
<td id="1" onclick="show(this.id)">点这1</td>
<td id="2" onclick="show(this.id)">点这2</td>
</tr>
</table>
<table width="340" border="1">
<tr>
<td width="170">参数项</td>
<td width="170">参数值</td>
</tr>
<tr>
<td>型号</td>
<td id="type"> </td>
</tr>
<tr>
<td>price1</td>
<td id="price"> </td>
</tr>
<tr>
<td>型号1</td>
<td id="type1"> </td>
</tr>
<tr>
<td>price</td>
<td id="price1"> </td>
</tr>
</table>
</body>
</html>
package helloWorld;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.json.simple.JSONArray;
import org.json.simple.JSONObject;
public class servlet35 extends HttpServlet {
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html;charset=gb2312");
PrintWriter out = response.getWriter();
String id = request.getParameter("id");
System.out.println(id);
JSONArray arr = new JSONArray();
JSONObject o = new JSONObject ();
o.put("type","adsl马克-to-win："+id);
o.put("price","333马克-to-win："+id);
arr.add(o);
o = new JSONObject ();
o.put("type1","adsl马克-to-win："+id+id);
o.put("price1","666马克-to-win："+id+id);
arr.add(o);
System.out.println("arr.toString() is"+ arr.toString());
out.print(arr.toString());
}
}
例 3.6
<html>
<head>
<title>Insert title here</title>
</head>
<script>
function show(t) {
var xmlhttp;
try {
xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e) {
try {
xmlhttp = new XMLHttpRequest();
} catch (e) {
}
}
}
xmlhttp.open("get", "servlet36?id=" + t);
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4) {
if (xmlhttp.status == 200) {
var xmldoc = xmlhttp.responseXML;
document.getElementById("type").innerHTML = xmldoc
.getElementsByTagName("type")[0].firstChild.nodeValue;
document.getElementById("price").innerHTML = xmldoc
.getElementsByTagName("price")[0].firstChild.nodeValue;
}
}
}
xmlhttp.send(null);
}
</script>
<body>
<table width="340" border="1">
<tr>
<td id="1" onclick="show(this.id)">点这1</td>
<td id="2" onclick="show(this.id)">点这2</td>
</tr>
</table>
<table width="340" border="1">
<tr>
<td width="170">参数项q</td>
<td width="170">参数值</td>
</tr>
<tr>
<td>型号</td>
<td id="type"> </td>
</tr>
<tr>
<td>price</td>
<td id="price"> </td>
</tr>
</table>
</body>
</html>
package helloWorld;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class servlet36 extends HttpServlet {
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
/*
* when you write back a XML stream, you must write as
* text/xml;charset=UTF-8
*/
response.setContentType("text/xml;charset=UTF-8");
// response.setContentType("text/xml");
PrintWriter out = response.getWriter();
String id = request.getParameter("id");
/* the following first statement can be ommited, */
// out.print("<?xml version=\"1.0\" ?>");
out.print("<root>");
out.print("<type>" + "adsl马克-to-win：" + id + "</type>");
out.print("<price>" + "333马克-to-win：" + id + "</price>");
out.print("</root>");
// System.out.print("<?xml version=\"1.0\" ?>");
System.out.print("<root>");
System.out.print("<type>" + "adsl马克-to-win：" + id + "</type>");
System.out.print("<price>" + "333马克-to-win：" + id + "</price>");
System.out.print("</root>");
}
}
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