SMBMS

SMBMS

项目如何搭建：可使用maven

一，项目搭建

1，搭建一个maven web项目

2，配置tomcat

3，测试项目是否能够跑起来

4，导入项目中会遇到的jar包


javax.servlet
servlet-api
2.5


javax.servlet.jsp
jsp-api
2.0


mysql
mysql-connector-java
5.1.32


javax.servlet.jsp.jstl
jstl-api
1.2


taglibs
standard
1.1.2

5，创建项目包结构

6，编写实体类：

ORM映射：表——类映射

User类

package com.fan.pojo;
import java.util.Date;
public class User {
private Integer id; //id
private String userCode; //用户编码
private String userName; //用户名称
private String userPassword; //用户密码
private Integer gender; //性别
private Date birthday; //出生日期
private String phone; //电话
private String address; //地址
private Integer userRole; //用户角色
private Integer createdBy; //创建者
private Date creationDate; //创建时间
private Integer modifyBy; //更新者
private Date modifyDate; //更新时间

private Integer age;//年龄
private String userRoleName; //用户角色名称

public String getUserRoleName() {
return userRoleName;
}
public void setUserRoleName(String userRoleName) {
this.userRoleName = userRoleName;
}
public Integer getAge() {
Date date = new Date();
Integer age = date.getYear()-birthday.getYear();
return age;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getUserCode() {
return userCode;
}
public void setUserCode(String userCode) {
this.userCode = userCode;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getUserPassword() {
return userPassword;
}
public void setUserPassword(String userPassword) {
this.userPassword = userPassword;
}
public Integer getGender() {
return gender;
}
public void setGender(Integer gender) {
this.gender = gender;
}
public Date getBirthday() {
return birthday;
}
public void setBirthday(Date birthday) {
this.birthday = birthday;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public Integer getUserRole() {
return userRole;
}
public void setUserRole(Integer userRole) {
this.userRole = userRole;
}
public Integer getCreatedBy() {
return createdBy;
}
public void setCreatedBy(Integer createdBy) {
this.createdBy = createdBy;
}
public Date getCreationDate() {
return creationDate;
}
public void setCreationDate(Date creationDate) {
this.creationDate = creationDate;
}
public Integer getModifyBy() {
return modifyBy;
}
public void setModifyBy(Integer modifyBy) {
this.modifyBy = modifyBy;
}
public Date getModifyDate() {
return modifyDate;
}
public void setModifyDate(Date modifyDate) {
this.modifyDate = modifyDate;
}

}

Role类

package com.fan.pojo;
import java.util.Date;
public class Role {
private Integer id; //id
private String roleCode; //角色编码
private String roleName; //角色名称
private Integer createdBy; //创建者
private Date creationDate; //创建时间
private Integer modifyBy; //更新者
private Date modifyDate;//更新时间

public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getRoleCode() {
return roleCode;
}
public void setRoleCode(String roleCode) {
this.roleCode = roleCode;
}
public String getRoleName() {
return roleName;
}
public void setRoleName(String roleName) {
this.roleName = roleName;
}
public Integer getCreatedBy() {
return createdBy;
}
public void setCreatedBy(Integer createdBy) {
this.createdBy = createdBy;
}
public Date getCreationDate() {
return creationDate;
}
public void setCreationDate(Date creationDate) {
this.creationDate = creationDate;
}
public Integer getModifyBy() {
return modifyBy;
}
public void setModifyBy(Integer modifyBy) {
this.modifyBy = modifyBy;
}
public Date getModifyDate() {
return modifyDate;
}
public void setModifyDate(Date modifyDate) {
this.modifyDate = modifyDate;
}
}

Provider类

package com.fan.pojo;
import java.util.Date;
public class Provider {
private Integer id; //id
private String proCode; //供应商编码
private String proName; //供应商名称
private String proDesc; //供应商描述
private String proContact; //供应商联系人
private String proPhone; //供应商电话
private String proAddress; //供应商地址
private String proFax; //供应商传真
private Integer createdBy; //创建者
private Date creationDate; //创建时间
private Integer modifyBy; //更新者
private Date modifyDate;//更新时间

public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getProCode() {
return proCode;
}
public void setProCode(String proCode) {
this.proCode = proCode;
}
public String getProName() {
return proName;
}
public void setProName(String proName) {
this.proName = proName;
}
public String getProDesc() {
return proDesc;
}
public void setProDesc(String proDesc) {
this.proDesc = proDesc;
}
public String getProContact() {
return proContact;
}
public void setProContact(String proContact) {
this.proContact = proContact;
}
public String getProPhone() {
return proPhone;
}
public void setProPhone(String proPhone) {
this.proPhone = proPhone;
}
public String getProAddress() {
return proAddress;
}
public void setProAddress(String proAddress) {
this.proAddress = proAddress;
}
public String getProFax() {
return proFax;
}
public void setProFax(String proFax) {
this.proFax = proFax;
}
public Integer getCreatedBy() {
return createdBy;
}
public void setCreatedBy(Integer createdBy) {
this.createdBy = createdBy;
}
public Date getCreationDate() {
return creationDate;
}
public void setCreationDate(Date creationDate) {
this.creationDate = creationDate;
}
public Integer getModifyBy() {
return modifyBy;
}
public void setModifyBy(Integer modifyBy) {
this.modifyBy = modifyBy;
}
public Date getModifyDate() {
return modifyDate;
}
public void setModifyDate(Date modifyDate) {
this.modifyDate = modifyDate;
}
}

Bill类

package com.fan.pojo;
import java.math.BigDecimal;
import java.util.Date;
public class Bill {
private Integer id; //id
private String billCode; //账单编码
private String productName; //商品名称
private String productDesc; //商品描述
private String productUnit; //商品单位
private BigDecimal productCount; //商品数量
private BigDecimal totalPrice; //总金额
private Integer isPayment; //是否支付
private Integer providerId; //供应商ID
private Integer createdBy; //创建者
private Date creationDate; //创建时间
private Integer modifyBy; //更新者
private Date modifyDate;//更新时间

private String providerName;//供应商名称

public String getProviderName() {
return providerName;
}
public void setProviderName(String providerName) {
this.providerName = providerName;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getBillCode() {
return billCode;
}
public void setBillCode(String billCode) {
this.billCode = billCode;
}
public String getProductName() {
return productName;
}
public void setProductName(String productName) {
this.productName = productName;
}
public String getProductDesc() {
return productDesc;
}
public void setProductDesc(String productDesc) {
this.productDesc = productDesc;
}
public String getProductUnit() {
return productUnit;
}
public void setProductUnit(String productUnit) {
this.productUnit = productUnit;
}
public BigDecimal getProductCount() {
return productCount;
}
public void setProductCount(BigDecimal productCount) {
this.productCount = productCount;
}
public BigDecimal getTotalPrice() {
return totalPrice;
}
public void setTotalPrice(BigDecimal totalPrice) {
this.totalPrice = totalPrice;
}
public Integer getIsPayment() {
return isPayment;
}
public void setIsPayment(Integer isPayment) {
this.isPayment = isPayment;
}

public Integer getProviderId() {
return providerId;
}
public void setProviderId(Integer providerId) {
this.providerId = providerId;
}
public Integer getCreatedBy() {
return createdBy;
}
public void setCreatedBy(Integer createdBy) {
this.createdBy = createdBy;
}
public Date getCreationDate() {
return creationDate;
}
public void setCreationDate(Date creationDate) {
this.creationDate = creationDate;
}
public Integer getModifyBy() {
return modifyBy;
}
public void setModifyBy(Integer modifyBy) {
this.modifyBy = modifyBy;
}
public Date getModifyDate() {
return modifyDate;
}
public void setModifyDate(Date modifyDate) {
this.modifyDate = modifyDate;
}
}

7，编写基础公共类

1，数据库配置文件

driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306?useUnicode=true&characterEncoding=utf-8
username=root
password=123456

2,在dao包建立BaseDao类

package com.fan.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("");
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");
}
//获取数据库的连接
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 excute(Connection connection,String sql,Object[] params,ResultSet resultSet,PreparedStatement preparedStatement) throws SQLException {

//预编译的sql，在后面直接执行就可以了
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;

}
//编写增删改公共方法
public static int excute(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;

}
//释放资源
public static boolean closeResource(Connection connection,PreparedStatement preparedStatement,ResultSet resultSet){

boolean flag = true;
if (resultSet!=null){
try {
resultSet.close();
//垃圾回收
resultSet = null;
} catch (SQLException e) {
e.printStackTrace();
flag = false;
}
}
if (preparedStatement!=null){
try {
preparedStatement.close();
//垃圾回收
preparedStatement = null;
} catch (SQLException e) {
e.printStackTrace();
flag = false;
}
}
if (connection!=null){
try {
connection.close();
//垃圾回收
connection = null;
} catch (SQLException e) {
e.printStackTrace();
flag = false;
}
}
return flag;
}

}

3.编写字符编码过滤器

在filter中建立CharacterEncodingFilter类

package com.fan.filter;

import javax.servlet.*;
import java.io.IOException;

public class CharacterEncodingFilter implements Filter {

public void init(FilterConfig filterConfig) throws ServletException {

}

public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8");
chain.doFilter(request,response);
}

public void destroy() {

}
}

在web.xml中注册



CharacterEncodingFilter
com.fan.filter.CharacterEncodingFilter


CharacterEncodingFilter

/*

8，导入静态资源

导入到web-app文件夹中

实现登录功能

（1）编写前端页面

login.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>




系统登录 - 超市订单管理系统






超市订单管理系统





${error }
















(2)将login.jsp设置为首页，在web.xml 中写



login.jsp

（3）编写dao层用户登录的接口：在dao中建立一个user包，在包中建一个UserDao接口，在接口中写 。

package com.fan.dao.user;
import com.fan.pojo.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UserDao接口的实现类UserDaoImpl

package com.fan.dao.user;

import com.fan.dao.BaseDao;
import com.fan.pojo.User;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class UserDaoImpl implements UserDao{
//得到登录的用户
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 user where userCode=?";
Object[] params = {userCode};

rs = BaseDao.excute(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）编写业务层接口

在service下建立user包，建立UserService接口

public interface UserService {
//用户登录
public User login(String userCode,String password);
}

(6)编写业务层接口的实现类

在service的user包中建立UserServiceImpl类

package com.fan.service.user;
import com.fan.dao.BaseDao;
import com.fan.dao.user.UserDao;
import com.fan.dao.user.UserDaoImpl;
import com.fan.pojo.User;
import org.junit.Test;
import javax.jws.soap.SOAPBinding;
import java.sql.Connection;
import java.sql.SQLException;

public class UserServiceImpl implements UserService {
//业务层都会调用dao层，所以我们要引入Dao层
private UserDao userDao;

public UserServiceImpl() {
userDao = new UserDaoImpl();
}

public User login(String userCode, String password) {
Connection connection = null;
User user = null;

try {
connection = BaseDao.getConnection();//得到连接
//通过业务层调用对应的具体的数据库操作
user = userDao.getLoginUser(connection, userCode);
//z做查询
} catch (SQLException e) {
e.printStackTrace();
} finally {
BaseDao.closeResource(connection, null, null);//关闭资源
}
return user;//调用这个login方法的，就可以拿到user
}

}

（7）编写Servlet类

在Servlet包中创建user包，在user包中建立LoginServlet类

public class LoginServlet extends HttpServlet {
//Servlet:控制层，调用业务层代码

@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

System.out.println("LoginServlet--start....");
//获取用户名和密码
String userCode = req.getParameter("userCode");
String userPassword = req.getParameter("userPassword");
//和数据库中的密码进行对比，调用业务层；
UserService userService = new UserServiceImpl();
User user = userService.login(userCode, userPassword); //这里已经把登录的人给查出来了
System.out.println(userCode);
System.out.println(userPassword);
if (user!=null){ //查有此人，可以登录
//将用户的信息放到Session中;
req.getSession().setAttribute(Constants.USER_SESSION,user);
//跳转到主页
resp.sendRedirect("jsp/frame.jsp");
}else {//查无此人，无法登录
//转发回登录页面，顺带提示它，用户名或者密码错误；
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);
}
}

在web.xml中注册


LoginServlet
com.kuang.servlet.user.LoginServlet


LoginServlet
/login.do

在util包中创建专门存放常量的Constants

package com.fan.util;

public class Constants {
public final static String USER_SESSION = "userSession";
}

二，注销

在Servlet包的user包中建立LogoutServlett类

public class LogoutServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
//移除用户的Constants.USER_SESSION
req.getSession().removeAttribute(Constants.USER_SESSION);
resp.sendRedirect("/login.jsp");//返回登录页面
}

@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
doGet(req, resp);
}
}

在web.xml中注册


LogoutServlet
com.kuang.servlet.user.LogoutServlet


LogoutServlet
/jsp/logout.do

设置自动注销

设置30分后session自动失效


30

三，登录拦截

在filter中建立SysFilter类

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;

//过滤器，从Session中获取用户，
User user = (User) request.getSession().getAttribute(Constants.USER_SESSION);

if (user==null){ //已经被移除或者注销了，或者未登录
response.sendRedirect("/error.jsp");
}else {
chain.doFilter(req,resp);
}
}

public void destroy() {

}
}

在web.xml中注册



SysFilter
com.kuang.filter.SysFilter


SysFilter
/jsp/*

四，密码修改的实现

1.编写dao层用户修改密码的接口UserDao

UserDao接口写如下代码

//修改当前用户密码
public int updatePwd(Connection connection, int id, String password) throws SQLException;

2.编写UserDao 接口实现类UserDaoImpl

public int updatePwd(Connection connection, int id, String 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, sql, params, pstm);
BaseDao.closeResource(null,pstm,null);
}

return execute;
}

3.编写业务层接口

在service的user包中的UserService接口中添加如下代码

//根据用户ID修改密码
public boolean updatePwd(int id, String pwd);

4.编写业务层接口实现类

在service的user包中的UserServiceImpl类中添加以下代码

public boolean updatePwd(int id, String 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 flag;
}

5.编写Servlet类

在Servlet包中的user包中建立UserServlet类

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")){
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){
//从Session里面拿ID;
Object o = req.getSession().getAttribute(Constants.USER_SESSION);

String newpassword = req.getParameter("newpassword");

System.out.println("UserServlet:"+newpassword);

boolean flag = false;

System.out.println(o!=null);
System.out.println(StringUtils.isNullOrEmpty(newpassword));

if (o!=null && newpassword!=null){
UserService userService = new UserServiceImpl();
flag = userService.updatePwd(((User) o).getId(), newpassword);
if (flag){
req.setAttribute("message","修改密码成功，请退出，使用新密码登录");
//密码修改成功，移除当前Session
req.getSession().removeAttribute(Constants.USER_SESSION);
}else {
req.setAttribute("message","密码修改失败");
//密码修改成功，移除当前Session
}
}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){
//从Session里面拿ID;

Object o = req.getSession().getAttribute(Constants.USER_SESSION);
String oldpassword = req.getParameter("oldpassword");
System.out.println(oldpassword);
//万能的Map : 结果集
Map<String, String> resultMap = new HashMap<String,String>();

if (o==null){ //Session失效了，session过期了
resultMap.put("result","sessionerror");
}else if (StringUtils.isNullOrEmpty(oldpassword)){ //输入的密码为空
resultMap.put("result","error");
}else {
String userPassword = ((User) o).getUserPassword(); //Session中用户的密码
if (oldpassword.equals(userPassword)){
resultMap.put("result","true");
}else {
resultMap.put("result","false");
}
}

try {
resp.setContentType("application/json");
PrintWriter writer = resp.getWriter();
//JSONArray 阿里巴巴的JSON工具类, 转换格式
/*
resultMap = ["result","sessionerror","result","error"]
Json格式 = {key：value}
*/
writer.write(JSONArray.toJSONString(resultMap));
writer.flush();
writer.close();
} catch (IOException e) {
e.printStackTrace();
}

}
}

在web.xml中注册


updatePwd
com.kuang.servlet.user.UserServlet


updatePwd
/jsp/user.do

三.用户管理实现

1.获取用户数量

（1）编写查询总人数的接口UserDao

UserDao接口写如下代码

//查询用户总数
public int getUserCount(Connection connection,String username ,int userRole)throws SQLException;

（2）UserDao接口实现类UserDaoImpl

向实现类中添加以下代码

public int getUserCount(Connection connection, String username, int userRole) throws SQLException {
//根据用户名或者角色查询用户总数

PreparedStatement pstm = null;
ResultSet rs = null;
int count = 0;

if (connection!=null){
StringBuffer sql = new StringBuffer();
sql.append("select count(1) as count from smbms_user u,smbms_role r where u.userRole = r.id");
ArrayList list = new ArrayList();//存放我们的参数

if (!StringUtils.isNullOrEmpty(username)){
sql.append(" and u.userName like ?");
list.add("%"+username+"%"); //index:0
}

if (userRole>0){
sql.append(" and u.userRole = ?");
list.add(userRole); //index:1
}

//怎么把List转换为数组
Object[] params = list.toArray();

System.out.println("UserDaoImpl->getUserCount:"+sql.toString()); //输出最后完整的SQL语句

rs = BaseDao.execute(connection, pstm, rs, sql.toString(), params);

if (rs.next()){
count = rs.getInt("count"); //从结果集中获取最终的数量
}
BaseDao.closeResource(null,pstm,rs);
}
return count;
}

（3）编写业务层接口

在service的user包中的UserService接口中添加如下代码

//查询记录数
public int getUserCount(String username,int userRole);

（4）编写业务层接口实现类

在service的user包中的UserServiceImpl类中添加以下代码

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.获取用户列表

（1）编写UserDao

UserDao接口写如下代码

//通过条件查询-userList
public List getUserList(Connection connection, String userName, int userRole, int currentPageNo,

（2）UserDao接口实现类UserDaoImpl

向实现类中添加以下代码

public List getUserList(Connection connection, String userName,int userRole,int currentPageNo, int pageSize)
throws Exception {
PreparedStatement pstm = null;
ResultSet rs = null;
List userList = new ArrayList();
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 list = new ArrayList();
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）编写业务层接口

在service的user包中的UserService接口中添加如下代码

//根据条件查询用户列表
public List getUserList(String queryUserName, int queryUserRole, int currentPageNo, int pageSize);

（4）编写业务层接口实现类

在service的user包中的UserServiceImpl类中添加以下代码

public List getUserList(String queryUserName, int queryUserRole, int currentPageNo, int pageSize) {
Connection connection = null;
List userList = null;
System.out.println("queryUserName ---- > " + queryUserName);
System.out.println("queryUserRole ---- > " + queryUserRole);
System.out.println("currentPageNo ---- > " + currentPageNo);
System.out.println("pageSize ---- > " + pageSize);
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）编写接口RoleDao

public interface RoleDao {
//获取角色列表
public List getRoleList(Connection connection) throws SQLException;
}

（2）RoleDao接口实现类RoleDaoImpl

向实现类中添加以下代码

public class RoleDaoImpl implements RoleDao {
//获取角色列表
public List getRoleList(Connection connection) throws SQLException {

PreparedStatement pstm = null;
ResultSet resultSet = null;
ArrayList roleList = new ArrayList();

if (connection!=null){
String sql = "select * from smbms_role";
Object[] params = {};
resultSet = BaseDao.execute(connection, pstm, resultSet, sql, params);

while (resultSet.next()){
Role _role = new Role();
_role.setId(resultSet.getInt("id"));
_role.setRoleCode(resultSet.getString("roleCode"));
_role.setRoleName(resultSet.getString("roleName"));
roleList.add(_role);
}
BaseDao.closeResource(null,pstm,resultSet);
}
return roleList;
}
}

（3）编写业务层接口

在service建立role包，然后建立RoleService接口，添加如下代码

//获取角色列表
public List getRoleList();

（4）编写业务层接口实现类

在service的role包中的RoleServiceImpl类中添加以下代码

public class RoleServiceImpl implements RoleService {

//引入Dao
private RoleDao roleDao;
public RoleServiceImpl() {
roleDao = new RoleDaoImpl();
}

public List getRoleList() {

Connection connection = null;
List roleList = null;
try {
connection = BaseDao.getConnection();
roleList = roleDao.getRoleList(connection);
} catch (SQLException e) {
e.printStackTrace();
} finally {
BaseDao.closeResource(connection,null,null);
}
return roleList;
}
}

4.编写Servlet类

对Servlet包中的user包中UserServlet类进行如下添加

//添加一个if判断
@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);
}else if (method.equals("query")&&method!=null){
this.query(req, resp);

}
}

//query方法
public void query(HttpServletRequest req, HttpServletResponse resp){

//查询用户列表

//从前端获取数据；
String queryUserName = req.getParameter("queryname");
String temp = req.getParameter("queryUserRole");
String pageIndex = req.getParameter("pageIndex");
int queryUserRole = 0;

//获取用户列表
UserServiceImpl userService = new UserServiceImpl();
List userList = null;

//第一次走这个请求，一定是第一页，页面大小固定的；
int pageSize = 5; //可以把这个些到配置文件中，方便后期修改；
int currentPageNo = 1;

if (queryUserName ==null){
queryUserName = "";
}
if (temp!=null && !temp.equals("")){
queryUserRole = Integer.parseInt(temp); //给查询赋值！0,1,2,3
}
if (pageIndex!=null){
currentPageNo = Integer.parseInt(pageIndex);
}

//获取用户的总数 (分页： 上一页，下一页的情况)
int totalCount = userService.getUserCount(queryUserName, queryUserRole);
//总页数支持
PageSupport pageSupport = new PageSupport();
pageSupport.setCurrentPageNo(currentPageNo);
pageSupport.setPageSize(pageSize);
pageSupport.setTotalCount(totalCount);

int totalPageCount = ((int)(totalCount/pageSize))+1;

//控制首页和尾页
//如果页面要小于1了，就显示第一页的东西
if (currentPageNo<1){
currentPageNo = 1;
}else if (currentPageNo>totalPageCount){ //当前页面大于了最后一页；
currentPageNo = totalPageCount;
}

//获取用户列表展示
userList = userService.getUserList(queryUserName, queryUserRole, currentPageNo, pageSize);
req.setAttribute("userList",userList);

RoleServiceImpl roleService = new RoleServiceImpl();
List roleList = roleService.getRoleList();
req.setAttribute("roleList",roleList);
req.setAttribute("totalCount",totalCount);
req.setAttribute("currentPageNo",currentPageNo);
req.setAttribute("totalPageCount",totalPageCount);
req.setAttribute("queryUserName",queryUserName);
req.setAttribute("queryUserRole",queryUserRole);

//返回前端
try {
req.getRequestDispatcher("userlist.jsp").forward(req,resp);
} catch (ServletException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}

posted @ 2022-02-28 14:10  孤舟蓑衣客  阅读(27)  评论(0)    收藏  举报