JQuery ajax Demo 实例
今天就把自己的Demo贴出来 和大家共同学习现在就Jquery ajax 的 $.ajax(),$.post(),$.get();
首先是服务端的Servlet 演示这三个函数的用法对都是用的同一个 服务端
JAVA代碼jqueryAjaxServer.java
package cn.com.servlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import cn.com.jdbc.Jdbc;
public class jqueryAjaxServer extends HttpServlet {
public jqueryAjaxServer(){
super();
}
public void doGet(HttpServletRequest request,HttpServletResponse response)
throws IOException ,ServletException {
response.setContentType("text/html;charset=utf-8");
PrintWriter out=response.getWriter();
String account=request.getParameter("account");
String pass=request.getParameter("pass");
System.out.println("pass:"+pass);
Jdbc jdbc = new Jdbc();
inta = jdbc.FindName(account,pass);
if( a == 1){
out.print("Sorry,此用户名已经存在");
}
else{
out.print("此用户可以使用");
}
out.close();
}
public void doPost(HttpServletRequest request,HttpServletResponse response)
throws IOException ,ServletException {
this.doGet(request, response);
}
}
JAVA代碼Jdbc .java
package cn.com.jdbc;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import cn.com.vo.SysOper;
public class Jdbc {
/**
* @param args
*/
private static Connection conn = null;//声明Connection对象
private Statement stmt = null;//声明Statement对象
private ResultSet rs = null;//声明ResultSet对象
static{
// 加载数据库驱动类
try {
Class.forName("oracle.jdbc.driver.OracleDriver");
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// 访问数据库的地址
}
public Jdbc(){
}
public static Connection getConnection(){
String url = "dbc:oracle:thin:@127.0.0.1:1521:myoracle";
//创建Connection对象
try {
conn = DriverManager.getConnection(url, "zj", "zj");
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// 创建Statement对象
return conn;
}
public int FindName(String name,String pass){
String sql ="select t.login_code,t.login_pass from t_sys_oper t where t.login_code = '"+name+"' and t.login_pass = '"+pass+"'";
System.out.println(sql);
int i = 0;
try {
conn = Jdbc.getConnection();
stmt = conn.createStatement();
rs = stmt.executeQuery(sql);
SysOper oper = null;
while(rs.next()){
oper = new SysOper();
oper.setName(rs.getString("login_code"));
oper.setPass(rs.getString("login_pass"));
i = 1;
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// 执行SQL语句，返回记录集
return i;
}
}
下面是WEB.XML
Xml代码
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<servlet>
<servlet-name>jqueryAjaxServer</servlet-name>
<servlet-class>com.june.servlet.jqueryAjaxServer</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>jqueryAjaxServer</servlet-name>
<url-pattern>/jqueryAjax</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
下面是Jsp页面 第一个是 jqueryAjax.jsp本页使用的是$.ajax()
<%@ page language="java"pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>jquery ajax</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<script type="text/javascript" src="jquery/jquery-1.3.2.min.js"></script>
<script language="javascript">
$(function(){
$('.sumbit').click(function(){
if($('#account').val().length==0){
$('.hint').text("用户名不能位空").css({"background-color":"green"});
}
else{
$.ajax({
url:'jqueryAjax',
data:{account:$('#account').val(),pass:$('#pass').val()},
error:function(){
alert("error occured!!!");
},
success:function(data){
$('body').append("<div>"+data+"</div>").css("color","red");
}
});}
});
});
</script>
</head>
<body>
<h3 align="center">jquery AjaX</h3>
<hr>
<label>请输入用户名 ：</label>
<input id="account" name="account" type="text">
<br>
<label>请输入密码 ：</label>
<input id="pass" name="pass" type="text">
<input class="sumbit" type="button" value="检测">
<div class="hint">
</div>
</body>
</html>
第二个用的是$.post()
Html代码
<%@ page language="java"pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>jquery ajax</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<script type="text/javascript" src="jquery/jquery-1.3.2.min.js"></script>
<script language="javascript">
$(function(){
$('.sumbit').click(
function(){
if($('#account').val().length==0){
$('.hint').text("The account is cant't be null").css({"color":"red","background-color":"yellow"});
}
else{
$.post("jqueryAjax","account="+$('#account').val(),function(data){
$('.hint').text(data).css({"color":"red","background-color":"yellow"});
})
}
});
});
</script>
</head>
<body>
<h3 align="center">jquery Ajax</h3>
<hr>
<label>请输入用户名 ：</label>
<input id="account" name="account" type="text">
<input class="sumbit" type="button" value="检测">
<div class="hint">
</div>
</body>
</html>
<%@ page language="java"pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>jquery ajax</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<script src="js/jquery-1.2.6.js" type="text/javascript"></script>
<script language="javascript">
$(function(){
$('.sumbit').click(
function(){
if($('#account').val().length==0){
$('.hint').text("The account is cant't be null").css({"color":"red","background-color":"yellow"});
}
else{
$.post("jqueryAjax","account="+$('#account').val(),function(data){
$('.hint').text(data).css({"color":"red","background-color":"yellow"});
})
}
});
});
</script>
</head>
<body>
<h3 align="center">jquery Ajax</h3>
<hr>
<label>请输入用户名 ：</label>
<input id="account" name="account" type="text">
<input class="sumbit" type="button" value="检测">
<div class="hint">
</div>
</body>
</html>
第三个是用的$.get()
Html代码
<%@ pagepageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>jquery get</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<script type="text/javascript" src="jquery/jquery-1.3.2.min.js"></script>
<script type="text/javascript">
$(function(){
$('.sumbit').click(function(){
if($('#account').val().length==0){
$('.hint').html("用户名不能位空！！！").css({"color":"#ffoo11","background":"blue"});
}
else{
$.get("jqueryAjax","account="+$('#account').val(),
function(data){
$('.hint').html(data).css({"color":"#ffoo11","background":"green"});
});
}
});
});
</script>
</head>
<body>
<h3 align="center">jquery AjaX</h3>
<hr>
<label>请输入用户名 ：</label>
<input id="account" name="account" type="text">
<input class="sumbit" type="button" value="检测">
<div class="hint">
</div>
</body>
</html>
<%@ pagepageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>jquery get</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<script src="js/jquery-1.2.6.js" type="text/javascript"></script>
<script type="text/javascript">
$(function(){
$('.sumbit').click(function(){
if($('#account').val().length==0){
$('.hint').html("用户名不能位空！！！").css({"color":"#ffoo11","background":"blue"});
}
else{
$.get("jqueryAjax","account="+$('#account').val(),
function(data){
$('.hint').html(data).css({"color":"#ffoo11","background":"green"});
});
}
});
});
</script>
</head>
<body>
<h3 align="center">jquery AjaX</h3>
<hr>
<label>请输入用户名 ：</label>
<input id="account" name="account" type="text">
<input class="sumbit" type="button" value="检测">
<div class="hint">
</div>
</body>
</html>
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