web.xml文件：
<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<display-name>Test</display-name>
<description>编写一个测试的servlet类</description>
<servlet>
<servlet-name>testServlet</servlet-name> <!-- 首先，初始化参数、定制的URL模式以及其他定制通过此注册名而不是类名引用此servlet 其次,可在 URL而不是类名中使用此名称。因此，利用刚才给出的定义 -->
<servlet-class>com.JR.TestServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>testServlet</servlet-name>
<url-pattern>/test</url-pattern>
</servlet-mapping>
<welcome-file-list >
<welcome-file>jsp/com/JR/login.jsp</welcome-file>
</welcome-file-list>
</web-app>
Java文件代码：
package com.JR;
import java.io.IOException;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.log4j.PropertyConfigurator;
/**
* Servlet implementation class TestServlet
* ctrl + shift + F 搜狗繁简转换
* @function
* @JRockLi
* @2014年9月18日 下午7:32:11
* @lilf@inspur.com Inspur
* @Company Inspur
*/
@WebServlet("/TestServlet")
public class TestServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
private Log log=LogFactory.getLog(TestServlet.class);
public TestServlet() {
super();
}
public void init(ServletConfig config) throws ServletException {
}
public void destroy() {
}
public ServletConfig getServletConfig() {
return null;
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String pathDir = System.getProperty("user.dir");
String pathDirReplaceNext = pathDir.replace("\\", "/");
String strEnd = "/$war/WEB-INF/classes/log4j.properties";
String relativePath = pathDirReplaceNext + strEnd;// 相对路径
PropertyConfigurator.configure(relativePath);
try {
request.setCharacterEncoding("UTF-8");
String userName=request.getParameter("userName");
String passWord=request.getParameter("passWord");
if(log.isDebugEnabled()){
log.debug("JRockLi====从界面获得参数==="+userName+"==密码="+passWord);
}
if("lilf".equals(userName)&& "123".equals(passWord)){
response.sendRedirect("jsp/com/JR/success.jsp");//前面省略的地址：http://localhost:8080/Test/
}else{
request.getRequestDispatcher("jsp/com/JR/error.jsp").forward(request, response);//前面省略的地址：http://localhost:8080/Test/
}
} catch (Exception e) {
if(log.isErrorEnabled()){
log.error("JRockLi===跳转返回页面不成功==",e);
}
}
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request, response);
}
}
jsp文件：
<!DOCTYPE HTML>
<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%><!-- 没有这句代码，界面会是乱码 定义整个页面的编码方式-->
<html>
<head>
<meta charset="UTF-8" content="text/html" http-equiv="content-type"/>
<title>SUCCESS PAGE</title>
</head>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/skin";
%>
<script type="text/javascript" src="<%=basePath %>/js/jquery-1.11.1.js"></script>
<body>
<p>LOGIN</p>
<form >
<table>
<tr>
<td>用户名：</td>
<td><input id="userName" name="userName" value="lilf"/></td>
</tr>
<tr>
<td>密码：</td>
<td><input id="passWord" name="passWord" value="123"/></td>
</tr>
<tr><td><input type="button" id="buttonSubmit" name="buttonSubmit" value="提交" onclick="submitMethod()"></td></tr>
</table>
</form>
</body>
<script type="text/javascript">
function submitMethod(){
var userName=$("#userName").val();
var passWord=$("#passWord").val();
document.forms[0].action="http://localhost:8080/Test/test";
document.forms[0].submit();
}
</script>
</html>
备注：写的一个测试servlet的类，前台页面用到的是HTML5，用了加载log4j.properties文件，来打印自己追踪错误信息。
