用户表的增删改查（查询不带条件和分页）的dao实现类和servlet、登录和退出、动态菜单
dao接口：
// 插入用户, 注册功能
public int addUser(User user);
// 查询, 查询有多少用户已经注册
public List queryUsers(User user);
// 删除,删除已经注册的用户
public int deleteUser(int userId);
// 更新表中的数据
public int updateUser(User user);
//根据用户Id来修改用户
public User updateUser(int userId);
public User loginUser(User user);
//根据用户Id来修改用户,查看用户详情
public User getUserById(int userId);
//登录
public User login(String userName,String password); dao实现类：
@Override
public User login(String userName, String password) {
Connection conn = null;
PreparedStatement ps = null;
ResultSet rs = null;
User user=null;
String sql="SELECT USER_ID,USER_NAME,PASSWORD,REAL_NAME,SEX,BIRTHDAY,ROLE_ID FROM T_USER "
+ "WHERE USER_NAME=? AND PASSWORD=?";
try {
conn = DBUtil.getConnection();
ps=conn.prepareStatement(sql);
ps.setString(1, userName);
ps.setString(2, password);
rs=ps.executeQuery();
while(rs.next()) {
int userId=rs.getInt("USER_ID");
String username=rs.getString("USER_NAME");
String passWord=rs.getString("PASSWORD");
String realName=rs.getString("REAL_NAME");
int sex=rs.getInt("SEX");
String birthday=rs.getString("BIRTHDAY");
int roleId=rs.getInt("ROLE_ID");
user=new User(userId,username,passWord,realName,sex,birthday,roleId);
}
} catch (SQLException e) {
e.printStackTrace();
}finally {
DBUtil.closeConn(conn, ps, rs);
}
return user;
}
@Override
public int updateUser(User user) {
Connection conn = DBUtil.getConnection();
PreparedStatement ps = null;
ResultSet rs = null;
String sql = "UPDATE T_USER SET USER_NAME=?,PASSWORD=?,REAL_NAME=?,SEX=?,BIRTHDAY=TO_DATE(?,'YYYY-MM-DD'),ROLE_ID=?"
+ " WHERE USER_ID=?";
try {
ps = conn.prepareStatement(sql);
ps.setString(1, user.getUserName());
ps.setString(2, user.getPassword());
ps.setString(3, user.getRealName());
ps.setInt(4, user.getSex());
ps.setString(5, user.getBirthday());
ps.setInt(6, user.getRoleId());
ps.setInt(7,user.getUserId());
return ps.executeUpdate();
} catch (SQLException e) {
e.printStackTrace();
} finally {
DBUtil.closeConn(conn, ps, rs);
}
return 0;
}
@Override
public User updateUser(int userId) {
Connection conn =null;
PreparedStatement ps = null;
User user=null;
try {
conn=DBUtil.getConnection();
String sql = "UPDATE T_USER SET USER_NAME=?,PASSWORD,REAL_NAME=?,SEX=?,BIRTHDAY=TO_DATE(?,'YYYY-MM-DD'),ROLE_ID=? WHERE USER_ID=?";
ps = conn.prepareStatement(sql);
ps.setString(1, user.getUserName());
ps.setString(2, user.getPassword());
ps.setString(3, user.getRealName());
ps.setInt(4, user.getSex());
ps.setString(5, user.getBirthday());
ps.setInt(6, user.getRoleId());
ps.setInt(7, user.getUserId());
int result=ps.executeUpdate();
if(result>0) {
System.out.println("更新成功");
}else {
System.out.println("更新失败");
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
DBUtil.closeConn(conn, ps, null);
}
return user;
}
@Override
public User getUserById(int userId) {
Connection conn = DBUtil.getConnection();
PreparedStatement ps = null;
ResultSet rs = null;
User user=null;
String sql = "SELECT USER_ID,USER_NAME,PASSWORD,REAL_NAME,SEX,BIRTHDAY,ROLE_ID FROM T_USER WHERE USER_ID=?";
try {
ps = conn.prepareStatement(sql);
ps.setInt(1, userId);
rs = ps.executeQuery();
if(rs.next()) {
user=new User();
user.setUserId(rs.getInt("USER_ID"));
user.setUserName(rs.getString("USER_NAME"));
user.setPassword(rs.getString("PASSWORD"));
user.setRealName(rs.getString("REAL_NAME"));
user.setSex(rs.getInt("SEX"));
String birthday=(rs.getString("BIRTHDAY")).substring(0,10);
user.setBirthday(birthday);
user.setRoleId(rs.getInt("ROLE_ID"));
}
} catch (SQLException e) {
e.printStackTrace();
}finally {
DBUtil.closeConn(conn, ps, rs);
}
return user;
}
@Override
public int deleteUser(int userId) {
Connection conn = DBUtil.getConnection();
PreparedStatement ps = null;
ResultSet rs = null;
String sql = "DELETE FROM T_USER WHERE USER_ID=?";
try {
ps = conn.prepareStatement(sql);
ps.setInt(1, userId);
return ps.executeUpdate();
} catch (SQLException e) {
e.printStackTrace();
} finally {
DBUtil.closeConn(conn, ps, rs);
}
return 0;
}
@Override
public int addUser( User user) {
Connection conn=DBUtil.getConnection();
PreparedStatement ps = null;
ResultSet rs = null;
String sql = "INSERT INTO T_USER(USER_ID,USER_NAME,PASSWORD,REAL_NAME,SEX,BIRTHDAY,ROLE_ID) VALUES(SEQ_T_USER.NEXTVAL,?,?,?,?,TO_DATE(?,'yyyy-mm-dd'),?)";
try {
ps = conn.prepareStatement(sql);
ps.setString(1, user.getUserName());
ps.setString(2, user.getPassword());
ps.setString(3, user.getRealName());
ps.setInt(4, user.getSex());
ps.setString(5, user.getBirthday());
ps.setInt(6, user.getRoleId());
return ps.executeUpdate();
} catch (SQLException e) {
e.printStackTrace();
} finally {
DBUtil.closeConn(conn, ps, rs);
}
return 0;
}
@Override
public User loginUser(User user) {
Connection conn = DBUtil.getConnection();
PreparedStatement ps = null;
ResultSet rs = null;
User users = null;
String sql = "SELECT * FROM T_USER WHERE USER_NAME=? AND PASSWORD=?";
try {
ps = conn.prepareStatement(sql);
ps.setString(1, user.getUserName());
ps.setString(2, user.getPassword());
rs = ps.executeQuery();
while (rs.next()) {
// users = new User();
// users.setUserId(rs.getInt("USER_ID"));
// users.setUserName(rs.getString("USER_NAME"));
// users.setPassword(rs.getString("PASSWORD"));
// users.setRealName(rs.getString("REAL_NAME"));
// users.setSex(rs.getInt("SEX"));
// users.setBirthday(rs.getString("BIRTHDAY"));
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
DBUtil.closeConn(conn, ps, rs);
}
return users;
}
@Override
public List queryUsers(User user) {
List users = new ArrayList();
Connection conn = DBUtil.getConnection();
PreparedStatement ps = null;
ResultSet rs = null;
String sql = "SELECT USER_ID,USER_NAME,PASSWORD,REAL_NAME,SEX,BIRTHDAY FROM T_USER WHERE 1=1";
try {
// 这是动态拼接查询条件
if (user.getRealName() != null && user.getRealName().equals("")) {
sql += "AND REAL_NAME LIKE ?";
}
ps = conn.prepareStatement(sql);
// 有多个条件+多个条件的判断
if (user.getRealName() != null && user.getRealName().equals("")) {
ps.setString(1, "%" + user.getRealName() + "%");
}
rs = ps.executeQuery();
while (rs.next()) {
int userId = rs.getInt("USER_ID");
String userName = rs.getString("USER_NAME");
String password = rs.getString("PASSWORD");
String realName = rs.getString("REAL_NAME");
int sex = rs.getInt("SEX");
String birthDay = rs.getString("BIRTHDAY");
User temp = new User();
temp.setUserId(userId);
temp.setUserName(userName);
temp.setPassword(password);
temp.setRealName(realName);
temp.setSex(sex);
temp.setBirthday(birthDay);
users.add(temp);
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
DBUtil.closeConn(conn, ps, rs);
}
return users;
}
UserServlet：
package com.cyzy.servlet;
import java.io.IOException;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.cyzy.bean.Role;
import com.cyzy.bean.User;
import com.cyzy.service.RoleService;
import com.cyzy.service.UserService;
import com.cyzy.util.ServiceFactory;
/**
* Servlet implementation class UserServlet
*/
public class UserServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public UserServlet() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse
* response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("UTF-8");
String userAction = request.getParameter("userAction");
if (userAction != null && userAction.equals("addBefore")) {
addBefore(request, response);
} else if (userAction != null && userAction.equals("add")) {
addUser(request, response);
} else if (userAction != null && userAction.equals("delete")) {
deleteUser(request, response);
} else if (userAction != null && userAction.equals("updateBefore")) {
updateBefore(request, response);
} else if (userAction != null && userAction.equals("update")) {
updateUser(request, response);
} else if (userAction != null && userAction.equals("list")) {
queryUserList(request, response);
} else if (userAction != null && userAction.equals("detail")) {
userDetail(request, response);
}else if (userAction != null && userAction.equals("userId")) {
byUserId(request, response);
}else if (userAction != null && userAction.equals("getRoleList")) {
getRoleList(request, response);
}
}
private void userDetail(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 防止乱码
request.setCharacterEncoding("UTF-8");
response.setContentType("text/html");
response.setCharacterEncoding("UTF-8");
byUserId(request, response);
getRoleList(request, response);
request.getRequestDispatcher("/user/user_detail.jsp").forward(request, response);
}
private void addBefore(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 防乱码
request.setCharacterEncoding("UTF-8");
response.setContentType("text/html");
response.setCharacterEncoding("UTF-8");
getRoleList(request, response);
request.getRequestDispatcher("/user/user_add.jsp").forward(request, response);
}
//获取角色列表
private void getRoleList(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
Role role=new Role();
RoleService roleService=(RoleService)ServiceFactory.getServiceImpl(RoleService.class.getName());
List roleList=roleService.queryRole(role);
request.setAttribute("roleList", roleList);
}
private void addUser(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 防乱码
request.setCharacterEncoding("UTF-8");
response.setContentType("text/html");
response.setCharacterEncoding("UTF-8");
//增加用户
String userName = request.getParameter("userName");
String password = request.getParameter("password");
String realName = request.getParameter("realName");
int sex=Integer.parseInt(request.getParameter("sex"));
String birthday = request.getParameter("birthday");
int roleId=Integer.parseInt(request.getParameter("roleId"));
User user = new User(0,userName,password,realName,sex,birthday,roleId);
UserService userService=(UserService)ServiceFactory.getServiceImpl(UserService.class.getName());
int result=userService.addUser(user);
if(result>0) {
queryUserList(request,response);
}
}
// 执行修改操作前
private void updateBefore(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("UTF-8");
response.setContentType("text/html");
response.setCharacterEncoding("UTF-8");
byUserId(request, response);
getRoleList(request, response);
request.getRequestDispatcher("/user/user_update.jsp").forward(request, response);
}
//得到个人用户信息
private void byUserId(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String userId = request.getParameter("userId");
UserService userService=(UserService)ServiceFactory.getServiceImpl(UserService.class.getName());
User user=userService.getUserById(Integer.parseInt(userId));
request.setAttribute("user", user);
}
private void updateUser(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("UTF-8");
response.setContentType("text/html");
response.setCharacterEncoding("UTF-8");
int userId=Integer.parseInt(request.getParameter("userId"));
String userName = request.getParameter("userName");
String password = request.getParameter("password");
String realName = request.getParameter("realName");
int sex=Integer.parseInt(request.getParameter("sex"));
String birthday = request.getParameter("birthday");
int roleId=Integer.parseInt(request.getParameter("roleId"));
User user=new User(userId,userName,password,realName,sex,birthday,roleId);
UserService userService=(UserService)ServiceFactory.getServiceImpl(UserService.class.getName());
int result=userService.updateUser(user);
System.out.println("result:"+result);
if(result>0) {
queryUserList(request, response);
}
}
private void deleteUser(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("UTF-8");
response.setContentType("text/html");
response.setCharacterEncoding("UTF-8");
String userId = request.getParameter("userId");
UserService userService=(UserService)ServiceFactory.getServiceImpl(UserService.class.getName());
int result = userService.deleteUser(Integer.parseInt(userId));
if (result > 0) {
queryUserList(request, response);
}
}
private void queryUserList(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 防止乱码
request.setCharacterEncoding("UTF-8");
response.setContentType("text/html");
response.setCharacterEncoding("UTF-8");
User user = new User();
UserService userService=(UserService)ServiceFactory.getServiceImpl(UserService.class.getName());
List userList = userService.queryUsers(user);
request.setAttribute("userList", userList);
request.getRequestDispatcher("/user/user_list.jsp").forward(request, response);
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
* response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}
LoginServlet：
package com.cyzy.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import com.cyzy.bean.Menu;
import com.cyzy.bean.User;
import com.cyzy.service.MenuService;
import com.cyzy.service.UserService;
import com.cyzy.util.ServiceFactory;
/**
* Servlet implementation class LoginServlet
*/
public class LoginServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public LoginServlet() {
super();
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
request.setCharacterEncoding("UTF-8");
String loginAction=request.getParameter("loginAction");
if (loginAction != null && loginAction.equals("login")) {
login(request,response);
}else if (loginAction != null && loginAction.equals("loginOut")) {
loginOut(request,response);
}
}
private void login(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("UTF-8");
response.setContentType("text/html");
response.setCharacterEncoding("UTF-8");
//查询用户是不是存在
String userName=request.getParameter("userName");
String password=request.getParameter("password");
UserService userService=(UserService)ServiceFactory.getServiceImpl(UserService.class.getName());
User user=userService.login(userName, password);
if(user!=null) {
HttpSession session=request.getSession();
//session.setMaxInactiveInterval(10);//超时时间以秒为单位
session.setAttribute("loginUser", user);
//还要查询此用户所拥有的菜单
//菜单列表扔到request/session范围
List