登录、字符集过滤器
package com.good.domain;
public class User {
private Integer id;
private String username;
private String password;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
package com.good.controller;
import java.io.IOException;
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 com.good.domain.User;
import com.good.model.UserModel;
/**
* Servlet implementation class UserServlet
*/
@WebServlet("/UserServlet")
public class UserServlet extends HttpServlet {
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
try {
String username = request.getParameter("username");
String password = request.getParameter("password");
User user = new User();
user.setUsername(username);
user.setPassword(password);
UserModel userModel = new UserModel();
User existUser = userModel.login(user);
if(existUser == null) {
request.setAttribute("msg", "用户名或密码错误");
request.getRequestDispatcher("/login.jsp").forward(request, response);
}else {
request.getSession().setAttribute("exisetUser", existUser);
response.sendRedirect(request.getContextPath() + "/jsp/success.jsp");
}
} catch (Exception e) {
e.printStackTrace();
}
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request, response);
}
}
package com.good.model;
import java.sql.SQLException;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanHandler;
import com.good.domain.User;
import com.good.utils.Utils;
/**
*
* @author 于卓霖
*
*/
public class UserModel {
public User login(User user) throws SQLException {
QueryRunner queryRunner = new QueryRunner(Utils.getDataSource());
String sql = "select * from user where username=? and password=?";
User existUser = queryRunner.query(sql, new BeanHandler<User>(User.class),user.getUsername(),user.getPassword());
return existUser;
}
}
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<h1>登录页面</h1>
<h3><font color="red">${ msg }</font></h3>
<form action="${ pageContext.request.contextPath }/UserServlet" method="post">
<table border="1" width="400">
<tr>
<td>用户名</td>
<td><input type="text" name="username"></td>
</tr>
<tr>
<td>密码</td>
<td><input type="password" name="password"></td>
</tr>
<tr>
<td colspan="2"><input type="submit" value="登录"></td>
</tr>
</table>
</form>
</body>
</html>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<h1>您已经登录程璐！欢迎：${ existUser.username }</h1>
<a href="${ pageContext.request.contextPath }/jsp/sub.jsp">提交数据</a>
</body>
</html>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<h1></h1>
<form action="${ pageContext.request.contextPath }/ServletDemo1" method="get">
姓名:<input type="text" name="name"><br>
<input type="submit" value="提交">
</form>
<h1></h1>
<form action="${ pageContext.request.contextPath }/ServletDemo1" method="get">
姓名:<input type="text" name="name"><br>
<input type="submit" value="提交">
</form>
</body>
package com.good.controller;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Servlet implementation class ServletDemo1
*/
@WebServlet("/ServletDemo1")
public class ServletDemo1 extends HttpServlet {
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String name = request.getParameter("name");
System.out.println("GET方式接收的名称：" + name);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String name = request.getParameter("name");
System.out.println("POST方式接收的名称：" + name);
}
}
package com.good.filter;
import java.io.UnsupportedEncodingException;
import javax.servlet.AsyncContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
public class MyHttpServletRequest extends HttpServletRequestWrapper{
private HttpServletRequest request;
public MyHttpServletRequest(HttpServletRequest request) {
super(request);
this.request = request;
}
@Override
public String getParameter(String name) {
String method = request.getMethod();
if("GET".equals(method)) {
String value = super.getParameter(name);
try {
// value = new String(value.getBytes("ISO-8859-1"),"UTF-8");
value = new String(value.getBytes("UTF-8"),"UTF-8");
}catch(UnsupportedEncodingException e) {
e.printStackTrace();
}
return value;
}else if("POST".equals(method)) {
try {
request.setCharacterEncoding("UTF-8");
}catch(UnsupportedEncodingException e) {
e.printStackTrace();
}
}
return super.getParameter(name);
}
}
package com.good.filter;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
public class GenericEncodingFilter implements Filter{
@Override
public void destroy() {
// TODO Auto-generated method stub
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException {
HttpServletRequest req = (HttpServletRequest) request;
MyHttpServletRequest myReq = new MyHttpServletRequest(req);
chain.doFilter(myReq, response);
}
@Override
public void init(FilterConfig filterConfig) throws ServletException {
// TODO Auto-generated method stub
}
}
package com.good.filter;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import com.good.domain.User;
public class MyPrivilegeFilter implements Filter{
@Override
public void destroy() {
// TODO Auto-generated method stub
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain Chain)
throws IOException, ServletException {
HttpServletRequest req = (HttpServletRequest) request;
User existUser = (User) req.getSession().getAttribute("existUser");
if(existUser == null) {
req.setAttribute("msg", "您还没有登录！没有权限访问！");
req.getRequestDispatcher("/login.jsp").forward(request, response);
}else {
Chain.doFilter(request,response);
}
}
@Override
public void init(FilterConfig arg0) throws ServletException {
// TODO Auto-generated method stub
}
}
