超适合练手的一套JavaWeb项目 （超市后台管理系统）(适合练手的动漫人物)

超适合练手的一套JavaWeb项目 （超市后台管理系统） GIF动态图演示

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百度百度网盘提取项目 带数据库！[链接]:https://pan.baidu.com/s/13F2rxszZRLGDt9pr6ixYUg提取码：关注私信我发送！一、项目搭建准备工作1.搭建一个maven web项目2.配置Tomcat3.测试项目是否能够跑起来4.导入项目中遇到的jar包5.创建项目结构 6.编写实体类ORM映射：表类映射7.编写基础公共类1.数据库配置文件

db.properties文件代码

driver=com.mysql.jdbc.Driverurl=jdbc:mysql://localhost:3306?useUnicode=true&characterEncoding=utf-8username=rootpassword=1111112.编写数据库的公共类

java代码

package com.syj.dao;import java.io.IOException;import java.io.InputStream;import java.sql.*;import java.util.Properties;//操作数据库的公共类public class BaseDao { private static String driver; private static String url; private static String username; private static String password; //静态代码块，类加载的时候就初始化了 static { Properties properties = new Properties(); //通过类加载器读取对应的资源 InputStream is = BaseDao.class.getClassLoader().getResourceAsStream("db.properties"); try { properties.load(is); } catch (IOException e) { e.printStackTrace(); } driver = properties.getProperty("driver"); url = properties.getProperty("url"); username = properties.getProperty("username"); password = properties.getProperty("password"); } //获取数据库的链接 public static Connection getConnection(){ Connection connection = null; try { Class.forName(driver); connection = DriverManager.getConnection(url, username, password); } catch (Exception e) { e.printStackTrace(); } return connection; } //编写查询公共类 public static ResultSet execute( Connection connection,String sql,Object[] params,ResultSet resultSet, PreparedStatement preparedStatement ) throws SQLException { preparedStatement = connection.prepareStatement(sql); for (int i = 0; i < params.length; i++) { //setObject,占位符从1开始，但是我们的数组是从0开始！ preparedStatement.setObject(i+1,params[i]); } resultSet = preparedStatement.executeQuery(); return resultSet; } //编写增删改查公共方法 public static int execute( Connection connection,String sql,Object[] params, PreparedStatement preparedStatement ) throws SQLException { preparedStatement = connection.prepareStatement(sql); for (int i = 0; i < params.length; i++) { //setObject,占位符从1开始，但是我们的数组是从0开始！ preparedStatement.setObject(i+1,params[i]); } int updateRows = preparedStatement.executeUpdate(); return updateRows; } public static boolean closeResource(Connection connection,PreparedStatement preparedStatement,ResultSet resultSet){ boolean flag = true; if(resultSet != null){ try { resultSet.close(); //GC回收 resultSet = null; } catch (SQLException e) { e.printStackTrace(); flag = false; } } if(preparedStatement != null){ try { preparedStatement.close(); //GC回收 preparedStatement = null; } catch (SQLException e) { e.printStackTrace(); flag = false; } } if(connection != null){ try { connection.close(); //GC回收 connection = null; } catch (SQLException e) { e.printStackTrace(); flag = false; } } return flag; }}3.编写字符编码过滤器8.导入静态资源二、登录功能实现1.编写前端页面2.设置欢迎界面

xml代码

<!--设置欢迎页面--> <welcome-file-list> <welcome-file>login.jsp</welcome-file> </welcome-file-list>3.编写dao层登录用户的接口

java dao层接口代码

package com.syj.dao.user;import com.syj.entity.User;import java.sql.Connection;import java.sql.SQLException;public interface UserDao { //得到登录的用户 public User getLoginUser(Connection connection,String userCode) throws SQLException;}4.编写dao接口的实现类

java dao接口的实现类代码

package com.syj.dao.user;import com.syj.dao.BaseDao;import com.syj.entity.User;import java.sql.Connection;import java.sql.PreparedStatement;import java.sql.ResultSet;import java.sql.SQLException;public class UserDaoImpl implements UserDao{ //得到要登录的用户 public User getLoginUser(Connection connection, String userCode) throws SQLException { PreparedStatement pstm = null; ResultSet rs = null; User user = null; if(connection != null){ String sql = "select * from smbms_user where userCode=?"; Object[] params = {userCode}; rs = BaseDao.execute(connection,pstm,rs,sql,params); if(rs.next()){ user = new User(); user.setId(rs.getInt("id")); user.setUserCode(rs.getString("userCode")); user.setUserName(rs.getString("userName")); user.setUserPassword(rs.getString("userPassword")); user.setGender(rs.getInt("gender")); user.setBirthday(rs.getDate("birthday")); user.setPhone(rs.getString("phone")); user.setAddress(rs.getString("address")); user.setUserRole(rs.getInt("userRole")); user.setCreatedBy(rs.getInt("createdBy")); user.setCreationDate(rs.getTimestamp("creationDate")); user.setModifyBy(rs.getInt("modifyBy")); user.setModifyDate(rs.getTimestamp("modifyDate")); } BaseDao.closeResource(null,pstm,rs); } return user; }}5.业务层接口

java service接口代码

package com.syj.service.user;import com.syj.entity.User;public interface UserService { //用户登录 public User login(String userCode,String password);}6.业务层实现类

java serviceImpl实现类代码

package com.syj.service.user;import com.syj.dao.BaseDao;import com.syj.dao.user.UserDao;import com.syj.dao.user.UserDaoImpl;import com.syj.entity.User;import java.sql.Connection;import java.sql.SQLException;public class UserServiceImpl implements UserService{ private UserDao userDao; public UserServiceImpl(){ userDao = new UserDaoImpl(); } public User login(String userCode, String password) { Connection connection = null; User user = null; connection = BaseDao.getConnection(); try { user = userDao.getLoginUser(connection,userCode); } catch (SQLException e) { e.printStackTrace(); }finally { BaseDao.closeResource(connection,null,null); } return user; }}7.编写Servlet

java 代码

package com.syj.servlet;import com.syj.entity.User;import com.syj.service.user.UserService;import com.syj.service.user.UserServiceImpl;import com.syj.util.Constants;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.io.IOException;public class LoginServlet extends HttpServlet { @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { String userCode = req.getParameter("userCode"); String userPassword = req.getParameter("userPassword"); UserService userService = new UserServiceImpl(); User user = userService.login(userCode, userPassword); if(user != null){ req.getSession().setAttribute(Constants.USER_SESSION,user); resp.sendRedirect("jsp/frame.jsp"); }else{ req.setAttribute("error","用户名或者密码不正确"); req.getRequestDispatcher("login.jsp").forward(req,resp); } } @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { doGet(req, resp); }}8.注册servlet

xml代码

<servlet> <servlet-name>LoginServlet</servlet-name> <servlet-class>com.syj.servlet.LoginServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>LoginServlet</servlet-name> <url-pattern>/login.do</url-pattern> </servlet-mapping>9.测试访问确保以上功能成功三、登陆功能优化注销功能：

思路：移除Session,返回登录界面 java servlet代码

package com.syj.servlet;import com.syj.util.Constants;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.io.IOException;public class LogoutServlet extends HttpServlet { @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { req.getSession().removeAttribute(Constants.USER_SESSION); resp.sendRedirect("/login.jsp"); } @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { doGet(req, resp); }}

xml 代码

<!--注销--> <servlet> <servlet-name>LogoutServlet</servlet-name> <servlet-class>com.syj.servlet.LogoutServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>LogoutServlet</servlet-name> <url-pattern>/jsp/logout.do</url-pattern> </servlet-mapping>四、登录拦截优化编写一个过滤器并注册

java 代码

package com.syj.filter;import com.syj.entity.User;import com.syj.util.Constants;import javax.servlet.*;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.io.IOException;public class SysFilter implements Filter { public void init(FilterConfig filterConfig) throws ServletException { } public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws IOException, ServletException { HttpServletRequest request = (HttpServletRequest) req; HttpServletResponse response = (HttpServletResponse) resp; User user = (User) request.getSession().getAttribute(Constants.USER_SESSION); if(user==null){ response.sendRedirect("/smbms/error.jsp"); }else{ chain.doFilter(req,resp); } } public void destroy() { }}

xml 代码

<!-- 用户登录过滤器--> <filter> <filter-name>SysFilter</filter-name> <filter-class>com.syj.filter.SysFilter</filter-class> </filter> <filter-mapping> <filter-name>SysFilter</filter-name> <url-pattern>/jsp/*</url-pattern> </filter-mapping>

测试，登录，注销，权限，以上功能都要保证执行成功

五、密码修改1.导入前端素材

pwdmodify.jsp

<li.><a.href=“${pageContext.request.contextPath }/jsp/pwdmodify.jsp”>密码修改</li.>

2.写项目，建议从底层向上写3.UserDao接口//修改用户密码 public int updatePwd(Connection connection,int id,int password) throws SQLException;4.UserDao接口实现类//修改用户密码 public int updatePwd(Connection connection, int id, int password) throws SQLException { PreparedStatement pstm = null; int execute = 0; if(connection != null){ String sql = "update smbms_user set userPassword = ? where id = ?"; Object[] params = {password,id}; execute = BaseDao.execute(connection,pstm,sql,params); BaseDao.closeResource(null,pstm,null); } return execute; }5.UserService层 //根据用户Id修改密码 public boolean updatePwd(int id,int pwd);6.UserService实现类public boolean updatePwd(int id, int pwd) { Connection connection = null; boolean flag = false; //修改密码 try { connection = BaseDao.getConnection(); if(userDao.updatePwd(connection,id,pwd) > 0){ flag = true; } } catch (SQLException e) { e.printStackTrace(); }finally { BaseDao.closeResource(connection,null,null); } return false; }7. servlet控制器层

记得实现复用，需要提取方法

@Overridepackage com.mario.servlet;import com.mario.entity.User;import com.mario.service.user.UserService;import com.mario.service.user.UserServiceImpl;import com.mario.util.Constants;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.io.IOException;public class UserServlet extends HttpServlet { @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { String method = req.getParameter("method"); if(method.equals("savepwd") && method != null){ this.updatePwd(req,resp); } } @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { doGet(req, resp); } public void updatePwd(HttpServletRequest req, HttpServletResponse resp){ Object obj = req.getSession().getAttribute(Constants.USER_SESSION); String newpassword = req.getParameter("newpassword"); System.out.println(newpassword); boolean flag = false; if(obj != null && newpassword != null){ UserService userService = new UserServiceImpl(); flag = userService.updatePwd(((User) obj).getId(), newpassword); if(flag){ req.setAttribute("message","修改密码成功"); req.getSession().removeAttribute(Constants.USER_SESSION); }else{ req.setAttribute("message","密码修改失败"); } }else{ req.setAttribute("message","新密码有问题"); } try { req.getRequestDispatcher("pwdmodify.jsp").forward(req,resp); } catch (ServletException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } }}8. 测试优化密码修改使用Ajax1.阿里巴巴的fastjson

pom.xml

<dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.61</version> </dependency>2.后台修改的代码package com.mario.servlet;import com.alibaba.fastjson.JSONArray;import com.mario.entity.User;import com.mario.service.user.UserService;import com.mario.service.user.UserServiceImpl;import com.mario.util.Constants;import com.mysql.jdbc.StringUtils;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.io.IOException;import java.io.PrintWriter;import java.util.HashMap;import java.util.Map;public class UserServlet extends HttpServlet { @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { String method = req.getParameter("method"); if(method.equals("savepwd") && method != null){ this.updatePwd(req,resp); }else if(method.equals("pwdmodify") && method != null){ this.pwdModify(req,resp); } } @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { doGet(req, resp); } //修改密码 public void updatePwd(HttpServletRequest req, HttpServletResponse resp){ Object obj = req.getSession().getAttribute(Constants.USER_SESSION); String newpassword = req.getParameter("newpassword"); System.out.println(newpassword); boolean flag = false; if(obj != null && newpassword != null){ UserService userService = new UserServiceImpl(); flag = userService.updatePwd(((User) obj).getId(), newpassword); if(flag){ req.setAttribute("message","修改密码成功"); req.getSession().removeAttribute(Constants.USER_SESSION); }else{ req.setAttribute("message","密码修改失败"); } }else{ req.setAttribute("message","新密码有问题"); } try { req.getRequestDispatcher("pwdmodify.jsp").forward(req,resp); } catch (ServletException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } //验证旧密码,session中有用户的密码 public void pwdModify(HttpServletRequest req, HttpServletResponse resp){ Object obj = req.getSession().getAttribute(Constants.USER_SESSION); String oldpassword = req.getParameter("oldpassword"); Map<String, String> resultMap = new HashMap<String, String>(); if(obj==null){ resultMap.put("result","sessionerror"); }else if(StringUtils.isNullOrEmpty(oldpassword)){ resultMap.put("result","error"); }else{ String userPassword = ((User) obj).getUserPassword(); if(oldpassword.equals(userPassword)){ resultMap.put("result","true"); }else{ resultMap.put("result","false"); } } try { resp.setContentType("application/json"); PrintWriter writer = resp.getWriter(); writer.write(JSONArray.toJSONString(resultMap)); writer.flush(); writer.close(); } catch (IOException e) { e.printStackTrace(); } }}3.测试六、用户管理实现1.获取用户数量1.UserDao //查询用户总数 public int getUserCount(Connection connection,String username,int userRole) throws SQLException;2.UserDaoImpl public int getUserCount(Connection connection, String username, int userRole) throws SQLException { PreparedStatement pstm = null; ResultSet rs = null; int count = 0; if(connection != null){ StringBuilder sql = new StringBuilder(); sql.append("select count(1) as count from smbms_user u,smbms_role r where u.userRole = r.id"); ArrayList<Object> list = new ArrayList<Object>(); if(!StringUtils.isNullOrEmpty(username)){ sql.append(" and u.userName like ? "); list.add("%"+username+"%"); } if(userRole>0){ sql.append(" and u.userRole = ? "); list.add(userRole); } Object[] params = list.toArray(); rs = BaseDao.execute(connection,pstm,rs,sql.toString(),params); if(rs.next()){ count = rs.getInt("count"); } BaseDao.closeResource(null,pstm,rs); } return count; }3.UserService //查询记录数 public int getUserCount(String username,int userRole);4.UserServiceImpl public int getUserCount(String username, int userRole) { Connection connection = null; int count = 0; try { connection = BaseDao.getConnection(); count = userDao.getUserCount(connection,username,userRole); } catch (SQLException e) { e.printStackTrace(); }finally { BaseDao.closeResource(connection,null,null); } return count; }2.用户列表页导入1.UserDao //通过用户输入的条件查询用户列表 public List<User> getUserList(Connection connection, String userName, int userRole, int currentPageNo, int pageSize) throws Exception;2.UserDaoImpl //通过用户输入的条件查询用户列表 public List<User> getUserList(Connection connection, String userName, int userRole, int currentPageNo, int pageSize) throws Exception { List<User> userList = new ArrayList<User>(); PreparedStatement pstm=null; ResultSet rs=null; if(connection!=null){ StringBuffer sql = new StringBuffer(); sql.append("select u.*,r.roleName as userRoleName from smbms_user u,smbms_role r where u.userRole = r.id"); List<Object> list = new ArrayList<Object>(); if(!StringUtils.isNullOrEmpty(userName)){ sql.append(" and u.userName like ?"); list.add("%"+userName+"%"); } if(userRole > 0){ sql.append(" and u.userRole = ?"); list.add(userRole); } sql.append(" order by creationDate DESC limit ?,?"); currentPageNo = (currentPageNo-1)*pageSize; list.add(currentPageNo); list.add(pageSize); Object[] params = list.toArray(); System.out.println("sql ----> " + sql.toString()); rs = BaseDao.execute(connection,pstm,rs,sql.toString(),params); while(rs.next()){ User _user = new User(); _user.setId(rs.getInt("id")); _user.setUserCode(rs.getString("userCode")); _user.setUserName(rs.getString("userName")); _user.setGender(rs.getInt("gender")); _user.setBirthday(rs.getDate("birthday")); _user.setPhone(rs.getString("phone")); _user.setUserRole(rs.getInt("userRole")); _user.setUserRoleName(rs.getString("userRoleName")); userList.add(_user); } BaseDao.closeResource(null, pstm, rs); } return userList; }3.UserService //根据条件查询用户列表 public List<User> getUserList(String queryUserName, int queryUserRole, int currentPageNo, int pageSize);4.UserServiceImplpublic List<User> getUserList(String queryUserName, int queryUserRole, int currentPageNo, int pageSize) { Connection connection = null; List<User> userList = null; try { connection = BaseDao.getConnection(); userList = userDao.getUserList(connection, queryUserName,queryUserRole,currentPageNo,pageSize); } catch (Exception e) { e.printStackTrace(); }finally{ BaseDao.closeResource(connection, null, null); } return userList; }3.获取角色操作1.RoleDao//获取角色列表 public List<Role> getRoleList(Connection connection) throws SQLException;2.RoleDaoImplpackage com.mario.dao.role;import com.mario.dao.BaseDao;import com.mario.entity.Role;import java.sql.Connection;import java.sql.PreparedStatement;import java.sql.ResultSet;import java.sql.SQLException;import java.util.ArrayList;import java.util.List;public class RoleDaoImpl implements RoleDao{ //获取角色列表 public List<Role> getRoleList(Connection connection) throws SQLException { PreparedStatement pstm = null; ResultSet rs = null; ArrayList<Role> rolesList = new ArrayList<Role>(); if(connection != null){ String sql = "select * from smbms_role"; Object[] params = {}; rs = BaseDao.execute(connection,pstm,rs,sql,params); while (rs.next()){ Role _role = new Role(); _role.setId( rs.getInt("id")); _role.setRoleCode( rs.getString("roleCode")); _role.setRoleName( rs.getString("roleName")); rolesList.add(_role); } BaseDao.closeResource(null, pstm, rs); } return rolesList; }}3.RoleService //获取角色列表 public List<Role> getRoleList();4.RoleServiceImplpackage com.mario.service.role;import com.mario.dao.BaseDao;import com.mario.dao.role.RoleDao;import com.mario.dao.role.RoleDaoImpl;import com.mario.entity.Role;import java.sql.Connection;import java.util.List;public class RoleServiceImpl implements RoleService{ private RoleDao roleDao; public RoleServiceImpl(){ roleDao = new RoleDaoImpl(); } //获取角色列表 public List<Role> getRoleList() { Connection connection=null; List<Role> roleList=null; try { connection= BaseDao.getConnection(); roleList = roleDao.getRoleList(connection); } catch (Exception e) { e.printStackTrace(); }finally { BaseDao.closeResource(connection,null,null); } return roleList; }}4.用户显示的Servlet

获取用户前端的数据（查询）

判断请求是否需要执行，看参数的值判断

为了实现分页，需要计算出当前页面和总页面，页面的大小

用户列表展示

返回前端

package com.mario.servlet;

import com.alibaba.fastjson.JSONArray; import com.mario.entity.Role; import com.mario.entity.User; import com.mario.service.role.RoleService; import com.mario.service.role.RoleServiceImpl; import com.mario.service.user.UserService; import com.mario.service.user.UserServiceImpl; import com.mario.util.Constants; import com.mario.util.PageSupport; import com.mysql.jdbc.StringUtils;

import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; import java.io.PrintWriter; import java.util.HashMap; import java.util.List; import java.util.Map;

public class UserServlet extends HttpServlet {

@Overrideprotected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { String method = req.getParameter("method"); if(method.equals("savepwd") && method != null){ this.updatePwd(req,resp); }else if(method.equals("pwdmodify") && method != null){ this.pwdModify(req,resp); }else if(method.equals("query") && method != null){ this.query(req,resp); }}@Overrideprotected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { doGet(req, resp);}public void query(HttpServletRequest req, HttpServletResponse resp){ //接收前端传来的参数 String queryUserName = req.getParameter("queryname"); String temp = req.getParameter("queryUserRole");//从前端传回来的用户角色码不知是否为空或者是有效角色码，所以暂存起来 String pageIndex = req.getParameter("pageIndex"); int queryUserRole=0; //通过UserServiceImpl得到用户列表,用户数 UserServiceImpl userService = new UserServiceImpl(); List<User> userList = null;//用来存储用户列表 //设置每页显示的页面容量 int pageSize = 5; //设置当前的默认页码 int currentPageNo=1; //前端传来的参数若不符合查询sql语句，即如果用户不进行设置，值为空会影响sql查询，需要给它们进行一些约束 if(queryUserName==null){//这里为空，说明用户没有输入要查询的用户名，则sql语句传值为""，%%，会查询所有记录 queryUserName=""; } if(temp!=null && !temp.equals("")){ //不为空，说明前端有传来的用户所设置的userCode，更新真正的角色码 queryUserRole=Integer.parseInt(temp);//强制转换，前端传递的参数都是默认字符串，要转成int类型 } if(pageIndex!=null){//说明当前用户有进行设置跳转页面 currentPageNo=Integer.valueOf(pageIndex); } //有了用户名和用户角色后可以开始查询了，所以需要显示当前查询到的总记录条数 int totalCount = userService.getUserCount(queryUserName, queryUserRole); //根据总记录条数以及当前每页的页面容量可以算出，一共有几页，以及最后一页的显示条数 PageSupport pageSupport = new PageSupport(); pageSupport.setCurrentPageNo(currentPageNo); pageSupport.setPageSize(pageSize); pageSupport.setTotalCount(totalCount); //可显示的总页数 int totalPageCount=pageSupport.getTotalPageCount(); //约束首位页，即防止用户输入的页面索引小于1或者大于总页数 if(currentPageNo<1){ currentPageNo=1; }else if(currentPageNo>totalPageCount){ currentPageNo=totalPageCount; } //有了，待查询条件，当前页码，以及每页的页面容量后，就可以给出每页的具体显示情况了 userList = userService.getUserList(queryUserName, queryUserRole, currentPageNo, pageSize); req.setAttribute("userList",userList); //通过RoleServiceImpl得到角色表 RoleService roleService = new RoleServiceImpl(); List<Role> roleList = roleService.getRoleList();//用来存储角色表 //得到了用户表与角色表以及各种经过处理后的参数，都存进req中 req.setAttribute("roleList",roleList); req.setAttribute("totalCount", totalCount); req.setAttribute("currentPageNo", currentPageNo); req.setAttribute("totalPageCount", totalPageCount); req.setAttribute("queryUserName", queryUserName); req.setAttribute("queryUserRole", queryUserRole); //将所得到的的所有req参数送回给前端 try { req.getRequestDispatcher("userlist.jsp").forward(req,resp); } catch (ServletException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); }}//修改密码public void updatePwd(HttpServletRequest req, HttpServletResponse resp){ Object obj = req.getSession().getAttribute(Constants.USER_SESSION); String newpassword = req.getParameter("newpassword"); System.out.println(newpassword); boolean flag = false; if(obj != null && newpassword != null){ UserService userService = new UserServiceImpl(); flag = userService.updatePwd(((User) obj).getId(), newpassword); if(flag){ req.setAttribute("message","修改密码成功"); req.getSession().removeAttribute(Constants.USER_SESSION); }else{ req.setAttribute("message","密码修改失败"); } }else{ req.setAttribute("message","新密码有问题"); } try { req.getRequestDispatcher("pwdmodify.jsp").forward(req,resp); } catch (ServletException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); }}//验证旧密码,session中有用户的密码public void pwdModify(HttpServletRequest req, HttpServletResponse resp){ Object obj = req.getSession().getAttribute(Constants.USER_SESSION); String oldpassword = req.getParameter("oldpassword"); Map<String, String> resultMap = new HashMap<String, String>(); if(obj==null){ resultMap.put("result","sessionerror"); }else if(StringUtils.isNullOrEmpty(oldpassword)){ resultMap.put("result","error"); }else{ String userPassword = ((User) obj).getUserPassword(); if(oldpassword.equals(userPassword)){ resultMap.put("result","true"); }else{ resultMap.put("result","false"); } } try { resp.setContentType("application/json"); PrintWriter writer = resp.getWriter(); writer.write(JSONArray.toJSONString(resultMap)); writer.flush(); writer.close(); } catch (IOException e) { e.printStackTrace(); }}

}

七、订单管理（增删改查）八、供应商管理（增删改查）文章上面的代码只有一部分具体看项目里面的代码…&&&

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