删除功能分析：
list.jsp:
<%@ page contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html>
<!-- 网页使用的语言 -->
<html lang="zh-CN">
<head>
<!-- 指定字符集 -->
<meta charset="utf-8">
<!-- 使用Edge最新的浏览器的渲染方式 -->
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<!-- viewport视口：网页可以根据设置的宽度自动进行适配，在浏览器的内部虚拟一个容器，容器的宽度与设备的宽度相同。
width: 默认宽度与设备的宽度相同
initial-scale: 初始的缩放比，为1:1 -->
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- 上述3个meta标签*必须*放在最前面，任何其他内容都*必须*跟随其后！ -->
<title>用户信息管理系统</title>
<!-- 1. 导入CSS的全局样式 -->
<link href="css/bootstrap.min.css" rel="stylesheet">
<!-- 2. jQuery导入，建议使用1.9以上的版本 -->
<script src="js/jquery-2.1.0.min.js"></script>
<!-- 3. 导入bootstrap的js文件 -->
<script src="js/bootstrap.min.js"></script>
<style type="text/css">
td, th {
text-align: center;
}
</style>
<%-- 删除指定id --%>
<script>
function deleteUser(id) {
//用户安全提示
if (confirm("确定要删除吗?")){
//访问路径
location.href = "${pageContext.request.contextPath}/delUserServlet?id="+id;
}
}
</script>
</head>
<body>
<div class="container">
<h3 style="text-align: center">用户信息列表</h3>
<div style="float: left">
<form class="form-inline">
<div class="form-group">
<label for="exampleInputName2">姓名</label>
<input type="text" class="form-control" id="exampleInputName2" placeholder="李四">
</div>
<div class="form-group">
<label for="exampleInputEmail2">籍贯</label>
<input type="email" class="form-control" id="exampleInputEmail2" placeholder="北京">
</div>
<div class="form-group">
<label for="exampleInputEmail3">邮箱</label>
<input type="email" class="form-control" id="exampleInputEmail3" placeholder="">
</div>
<button type="submit" class="btn btn-default">查询</button>
</form>
</div>
<div style="float: right; margin: 5px">
<td colspan="8" align="center"><a class="btn btn-primary" href="${pageContext.request.contextPath}/add.jsp">添加联系人</a></td>
<td colspan="8" align="center"><a class="btn btn-primary" href="add.html">删除选中</a></td>
</div>
<table border="1" class="table table-bordered table-hover">
<tr class="success">
<th><input type="checkbox"></th>
<th>编号</th>
<th>姓名</th>
<th>性别</th>
<th>年龄</th>
<th>籍贯</th>
<th>QQ</th>
<th>邮箱</th>
<th>操作</th>
</tr>
<c:forEach items="${users}" var="user" varStatus="s">
<tr>
<td><input type="checkbox"></td>
<td>${s.count}</td>
<td>${user.name}</td>
<td>${user.gender}</td>
<td>${user.age}</td>
<td>${user.address}</td>
<td>${user.qq}</td>
<td>${user.email}</td>
<td>
<a class="btn btn-default btn-sm" href="update.html">修改</a>
<%--<a class="btn btn-default btn-sm" href="${pageContext.request.contextPath}/delUserServlet?id=${user.id}">删除</a>--%>
<a class="btn btn-default btn-sm" href="javascript:deleteUser(${user.id})">删除</a>
</td>
</tr>
</c:forEach>
</table>
<div>
<nav aria-label="Page navigation">
<ul class="pagination">
<li>
<a href="#" aria-label="Previous">
<span aria-hidden="true">«</span>
</a>
</li>
<li><a href="#">1</a></li>
<li><a href="#">2</a></li>
<li><a href="#">3</a></li>
<li><a href="#">4</a></li>
<li><a href="#">5</a></li>
<li>
<a href="#" aria-label="Next">
<span aria-hidden="true">»</span>
</a>
</li>
<span style="font-size: 25px;margin-left: 5px">
共15条记录，共4页
</span>
</ul>
</nav>
</div>
</div>
</body>
</html>
UserDao接口：
package com.example.dao;
import com.example.domain.User1;
import java.util.List;
/**
* 用户操作的dao
*/
public interface UserDao {
public List<User1> findAll();
public User1 findUserByUsernameAndPassword(String username,String password);
void add(User1 user1);
void delete(int id);
}
UserDaoImpl类：
package com.example.dao.impl;
import com.example.dao.UserDao;
import com.example.domain.User1;
import com.example.util.JDBCUtils;
import org.springframework.dao.DataAccessException;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import java.util.List;
public class UserDaoImpl implements UserDao {
private JdbcTemplate template = new JdbcTemplate(JDBCUtils.getDataSource());
@Override
public List<User1> findAll() {
//实现JDBC数据库操作
//定义sql
String sql = "select * from user1";
List<User1> users = template.query(sql, new BeanPropertyRowMapper<User1>(User1.class));
return users;
}
@Override
public User1 findUserByUsernameAndPassword(String username, String password) {
try {
String sql = "select * from user1 where username = ? and password = ?";
User1 user1 = template.queryForObject(sql, new BeanPropertyRowMapper<User1>(User1.class), username, password);
return user1;
} catch (DataAccessException e) {
e.printStackTrace();
return null;
}
}
@Override
public void add(User1 user1) {
//1.定义sql
String sql = "insert into user1 value(null,?,?,?,?,?,?,null,null)";
//2.执行sql
template.update(sql,user1.getName(),user1.getGender(),user1.getAge(),user1.getAddress(),user1.getQq(),user1.getEmail());
}
@Override
public void delete(int id) {
//1.定义sql
String sql = "delete from user1 where id = ?";
template.update(sql, id);
}
}
UserService接口：
package com.example.service;
import com.example.domain.User1;
import java.util.List;
public interface UserService {
/**
* 查询方法
* @return
*/
public List<User1> findAll();
/**
* 登录方法
* @param user1
* @return
*/
User1 login(User1 user1);
/**
* 添加User1
* @param user1
*/
void addUser(User1 user1);
/**
* 根据id删除User1
* @param id
*/
void deleteUser(String id);
}
UserServiceImpl类：
package com.example.service.impl;
import com.example.dao.UserDao;
import com.example.dao.impl.UserDaoImpl;
import com.example.domain.User1;
import com.example.service.UserService;
import java.util.List;
public class UserServiceImpl implements UserService {
public UserDao dao = new UserDaoImpl();
@Override
public List<User1> findAll() {
//调用dao完成查询
return dao.findAll();
}
@Override
public User1 login(User1 user1) {
return dao.findUserByUsernameAndPassword(user1.getUsername(),user1.getPassword());
}
@Override
public void addUser(User1 user1) {
dao.add(user1);
}
@Override
public void deleteUser(String id) {
dao.delete(Integer.parseInt(id));//转换为int类型
}
}
DelUserServlet类：
package com.example.web.servlet;
import com.example.service.UserService;
import com.example.service.impl.UserServiceImpl;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.annotation.*;
import java.io.IOException;
@WebServlet(name = "delUserServlet", value = "/delUserServlet")
public class DelUserServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
this.doPost(request, response);
}
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//1.获取参数，id
String id = request.getParameter("id");
//2.调用service删除
UserService service = new UserServiceImpl();
service.deleteUser(id);
//3.跳转查询所有Servlet
response.sendRedirect(request.getContextPath()+"/userListServlet");
}
}
修改功能分析
修改功能代码实现
用户信息回显代码实现：
UserDao接口：
package com.example.dao;
import com.example.domain.User1;
import java.util.List;
/**
* 用户操作的dao
*/
public interface UserDao {
public List<User1> findAll();
public User1 findUserByUsernameAndPassword(String username,String password);
void add(User1 user1);
void delete(int id);
User1 findById(int id);
}
UserDaoImpl实现类：
package com.example.dao.impl;
import com.example.dao.UserDao;
import com.example.domain.User1;
import com.example.util.JDBCUtils;
import org.springframework.dao.DataAccessException;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import java.util.List;
public class UserDaoImpl implements UserDao {
private JdbcTemplate template = new JdbcTemplate(JDBCUtils.getDataSource());
@Override
public List<User1> findAll() {
//实现JDBC数据库操作
//定义sql
String sql = "select * from user1";
List<User1> users = template.query(sql, new BeanPropertyRowMapper<User1>(User1.class));
return users;
}
@Override
public User1 findUserByUsernameAndPassword(String username, String password) {
try {
String sql = "select * from user1 where username = ? and password = ?";
User1 user1 = template.queryForObject(sql, new BeanPropertyRowMapper<User1>(User1.class), username, password);
return user1;
} catch (DataAccessException e) {
e.printStackTrace();
return null;
}
}
@Override
public void add(User1 user1) {
//1.定义sql
String sql = "insert into user1 value(null,?,?,?,?,?,?,null,null)";
//2.执行sql
template.update(sql,user1.getName(),user1.getGender(),user1.getAge(),user1.getAddress(),user1.getQq(),user1.getEmail());
}
@Override
public void delete(int id) {
//1.定义sql
String sql = "delete from user1 where id = ?";
template.update(sql, id);
}
@Override
public User1 findById(int id) {
String sql = "select * from user1 where id = ?";
return template.queryForObject(sql, new BeanPropertyRowMapper<User1>(User1.class),id);// 只查询一次
}
}
UserService接口：
package com.example.service;
import com.example.domain.User1;
import java.util.List;
public interface UserService {
/**
* 查询方法
* @return
*/
public List<User1> findAll();
/**
* 登录方法
* @param user1
* @return
*/
User1 login(User1 user1);
/**
* 添加User1
* @param user1
*/
void addUser(User1 user1);
/**
* 根据id删除User1
* @param id
*/
void deleteUser(String id);
/**
* 根据id查询
* @param id
* @return
*/
User1 findUserById(String id);
}
UserServiceImpl实现类：
package com.example.service.impl;
import com.example.dao.UserDao;
import com.example.dao.impl.UserDaoImpl;
import com.example.domain.User1;
import com.example.service.UserService;
import java.util.List;
public class UserServiceImpl implements UserService {
public UserDao dao = new UserDaoImpl();
@Override
public List<User1> findAll() {
//调用dao完成查询
return dao.findAll();
}
@Override
public User1 login(User1 user1) {
return dao.findUserByUsernameAndPassword(user1.getUsername(),user1.getPassword());
}
@Override
public void addUser(User1 user1) {
dao.add(user1);
}
@Override
public void deleteUser(String id) {
dao.delete(Integer.parseInt(id));//转换为int类型
}
@Override
public User1 findUserById(String id) {
return dao.findById(Integer.parseInt(id));
}
}
findUserServlet：
package com.example.web.servlet;
import com.example.domain.User1;
import com.example.service.UserService;
import com.example.service.impl.UserServiceImpl;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.annotation.*;
import java.io.IOException;
@WebServlet(name = "findUserServlet", value = "/findUserServlet")
public class findUserServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
this.doPost(request, response);
}
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//1.获取id
String id = request.getParameter("id");
//2.调用Service查询
UserService service = new UserServiceImpl();
User1 user1 = service.findUserById(id);
//3.将User1存入request
request.setAttribute("user1", user1);
//4.转发到update.jsp
request.getRequestDispatcher("/update.jsp").forward(request, response);
}
}
list.jsp页面：
<%@ page contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html>
<!-- 网页使用的语言 -->
<html lang="zh-CN">
<head>
<!-- 指定字符集 -->
<meta charset="utf-8">
<!-- 使用Edge最新的浏览器的渲染方式 -->
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<!-- viewport视口：网页可以根据设置的宽度自动进行适配，在浏览器的内部虚拟一个容器，容器的宽度与设备的宽度相同。
width: 默认宽度与设备的宽度相同
initial-scale: 初始的缩放比，为1:1 -->
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- 上述3个meta标签*必须*放在最前面，任何其他内容都*必须*跟随其后！ -->
<title>用户信息管理系统</title>
<!-- 1. 导入CSS的全局样式 -->
<link href="css/bootstrap.min.css" rel="stylesheet">
<!-- 2. jQuery导入，建议使用1.9以上的版本 -->
<script src="js/jquery-2.1.0.min.js"></script>
<!-- 3. 导入bootstrap的js文件 -->
<script src="js/bootstrap.min.js"></script>
<style type="text/css">
td, th {
text-align: center;
}
</style>
<%-- 删除指定id --%>
<script>
function deleteUser(id) {
//用户安全提示
if (confirm("确定要删除吗?")){
//访问路径
location.href = "${pageContext.request.contextPath}/delUserServlet?id="+id;
}
}
</script>
</head>
<body>
<div class="container">
<h3 style="text-align: center">用户信息列表</h3>
<div style="float: left">
<form class="form-inline">
<div class="form-group">
<label for="exampleInputName2">姓名</label>
<input type="text" class="form-control" id="exampleInputName2" placeholder="李四">
</div>
<div class="form-group">
<label for="exampleInputEmail2">籍贯</label>
<input type="email" class="form-control" id="exampleInputEmail2" placeholder="北京">
</div>
<div class="form-group">
<label for="exampleInputEmail3">邮箱</label>
<input type="email" class="form-control" id="exampleInputEmail3" placeholder="">
</div>
<button type="submit" class="btn btn-default">查询</button>
</form>
</div>
<div style="float: right; margin: 5px">
<td colspan="8" align="center"><a class="btn btn-primary" href="${pageContext.request.contextPath}/add.jsp">添加联系人</a></td>
<td colspan="8" align="center"><a class="btn btn-primary" href="add.html">删除选中</a></td>
</div>
<table border="1" class="table table-bordered table-hover">
<tr class="success">
<th><input type="checkbox"></th>
<th>编号</th>
<th>姓名</th>
<th>性别</th>
<th>年龄</th>
<th>籍贯</th>
<th>QQ</th>
<th>邮箱</th>
<th>操作</th>
</tr>
<c:forEach items="${users}" var="user" varStatus="s">
<tr>
<td><input type="checkbox"></td>
<td>${s.count}</td>
<td>${user.name}</td>
<td>${user.gender}</td>
<td>${user.age}</td>
<td>${user.address}</td>
<td>${user.qq}</td>
<td>${user.email}</td>
<td>
<a class="btn btn-default btn-sm" href="${pageContext.request.contextPath}/findUserServlet?id=${user.id}">修改</a>
<%--<a class="btn btn-default btn-sm" href="${pageContext.request.contextPath}/delUserServlet?id=${user.id}">删除</a>--%>
<a class="btn btn-default btn-sm" href="javascript:deleteUser(${user.id})">删除</a>
</td>
</tr>
</c:forEach>
</table>
<div>
<nav aria-label="Page navigation">
<ul class="pagination">
<li>
<a href="#" aria-label="Previous">
<span aria-hidden="true">«</span>
</a>
</li>
<li><a href="#">1</a></li>
<li><a href="#">2</a></li>
<li><a href="#">3</a></li>
<li><a href="#">4</a></li>
<li><a href="#">5</a></li>
<li>
<a href="#" aria-label="Next">
<span aria-hidden="true">»</span>
</a>
</li>
<span style="font-size: 25px;margin-left: 5px">
共15条记录，共4页
</span>
</ul>
</nav>
</div>
</div>
</body>
</html>
update.jsp页面：
<%@ page contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html>
<!-- 网页使用的语言 -->
<html lang="zh-CN">
<head>
<!-- 指定字符集 -->
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>修改用户</title>
<link href="css/bootstrap.min.css" rel="stylesheet">
<script src="js/jquery-2.1.0.min.js"></script>
<script src="js/bootstrap.min.js"></script>
</head>
<body>
<div class="container" style="width: 400px;">
<h3 style="text-align: center;">修改联系人</h3>
<form action="" method="post">
<div class="form-group">
<label for="name">姓名：</label>
<input type="text" class="form-control" id="name" name="name" value="${user1.name}" readonly="readonly" placeholder="请输入姓名" />
</div>
<div class="form-group">
<label>性别：</label>
<c:if test="${user1.gender == '男'}">
<input type="radio" name="gender" value="男" checked />男
<input type="radio" name="gender" value="女" />女
</c:if>
<c:if test="${user1.gender == '女'}">
<input type="radio" name="gender" value="男" />男
<input type="radio" name="gender" value="女" checked="checked" />女
</c:if>
</div>
<div class="form-group">
<label for="age">年龄：</label>
<input type="text" class="form-control" id="age" name="age" value="${user1.age}" placeholder="请输入年龄" />
</div>
<div class="form-group">
<label for="address">籍贯：</label>
<select name="address" class="form-control" >
<c:if test="${user1.address == '陕西'}">
<option value="陕西" selected>陕西</option>
<option value="北京">北京</option>
<option value="湖南">湖南</option>
</c:if>
<c:if test="${user1.address == '北京'}">
<option value="陕西">陕西</option>
<option value="北京" selected>北京</option>
<option value="湖南">湖南</option>
</c:if>
<c:if test="${user1.address == '湖南'}">
<option value="陕西">陕西</option>
<option value="北京">北京</option>
<option value="湖南" selected>湖南</option>
</c:if>
</select>
</div>
<div class="form-group">
<label for="qq">QQ：</label>
<input type="text" class="form-control" name="qq" value="${user1.qq}" placeholder="请输入QQ号码"/>
</div>
<div class="form-group">
<label for="email">Email：</label>
<input type="text" class="form-control" name="email" value="${user1.email}" placeholder="请输入邮箱地址"/>
</div>
<div class="form-group" style="text-align: center">
<input class="btn btn-primary" type="submit" value="提交" />
<input class="btn btn-default" type="reset" value="重置" />
<input class="btn btn-default" type="button" value="返回"/>
</div>
</form>
</div>
</body>
</html>
用户修改代码实现：
UserDao接口：
package com.example.dao;
import com.example.domain.User1;
import java.util.List;
/**
* 用户操作的dao
*/
public interface UserDao {
public List<User1> findAll();
public User1 findUserByUsernameAndPassword(String username,String password);
void add(User1 user1);
void delete(int id);
User1 findById(int id);
void update(User1 user1);
}
UserDaoImpl实现类：
package com.example.dao.impl;
import com.example.dao.UserDao;
import com.example.domain.User1;
import com.example.util.JDBCUtils;
import org.springframework.dao.DataAccessException;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import java.util.List;
public class UserDaoImpl implements UserDao {
private JdbcTemplate template = new JdbcTemplate(JDBCUtils.getDataSource());
@Override
public List<User1> findAll() {
//实现JDBC数据库操作
//定义sql
String sql = "select * from user1";
List<User1> users = template.query(sql, new BeanPropertyRowMapper<User1>(User1.class));
return users;
}
@Override
public User1 findUserByUsernameAndPassword(String username, String password) {
try {
String sql = "select * from user1 where username = ? and password = ?";
User1 user1 = template.queryForObject(sql, new BeanPropertyRowMapper<User1>(User1.class), username, password);
return user1;
} catch (DataAccessException e) {
e.printStackTrace();
return null;
}
}
@Override
public void add(User1 user1) {
//1.定义sql
String sql = "insert into user1 value(null,?,?,?,?,?,?,null,null)";
//2.执行sql
template.update(sql,user1.getName(),user1.getGender(),user1.getAge(),user1.getAddress(),user1.getQq(),user1.getEmail());
}
@Override
public void delete(int id) {
//1.定义sql
String sql = "delete from user1 where id = ?";
template.update(sql, id);
}
@Override
public User1 findById(int id) {
String sql = "select * from user1 where id = ?";
return template.queryForObject(sql, new BeanPropertyRowMapper<User1>(User1.class),id);// 只查询一次
}
@Override
public void update(User1 user1) {
//1.定义sql
String sql = "update user1 set name = ? , gender = ? , age = ?, address = ?, qq = ?, email = ? where id = ?";
template.update(sql,user1.getName(),user1.getGender(),user1.getAge(),user1.getAddress(),user1.getQq(),user1.getEmail(),user1.getId());
}
}
UserService接口：
package com.example.service;
import com.example.domain.User1;
import java.util.List;
public interface UserService {
/**
* 查询方法
* @return
*/
public List<User1> findAll();
/**
* 登录方法
* @param user1
* @return
*/
User1 login(User1 user1);
/**
* 添加User1
* @param user1
*/
void addUser(User1 user1);
/**
* 根据id删除User1
* @param id
*/
void deleteUser(String id);
/**
* 根据id查询
* @param id
* @return
*/
User1 findUserById(String id);
/**
* 修改用户信息
* @param user1
*/
void updateUser(User1 user1);
}
UserServiceImpl实现类：
package com.example.service.impl;
import com.example.dao.UserDao;
import com.example.dao.impl.UserDaoImpl;
import com.example.domain.User1;
import com.example.service.UserService;
import java.util.List;
public class UserServiceImpl implements UserService {
public UserDao dao = new UserDaoImpl();
@Override
public List<User1> findAll() {
//调用dao完成查询
return dao.findAll();
}
@Override
public User1 login(User1 user1) {
return dao.findUserByUsernameAndPassword(user1.getUsername(),user1.getPassword());
}
@Override
public void addUser(User1 user1) {
dao.add(user1);
}
@Override
public void deleteUser(String id) {
dao.delete(Integer.parseInt(id));//转换为int类型
}
@Override
public User1 findUserById(String id) {
return dao.findById(Integer.parseInt(id));
}
@Override
public void updateUser(User1 user1) {
dao.update(user1);
}
}
updateUserServlet：
package com.example.web.servlet;
import com.example.domain.User1;
import com.example.service.UserService;
import com.example.service.impl.UserServiceImpl;
import org.apache.commons.beanutils.BeanUtils;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.annotation.*;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.util.Map;
@WebServlet(name = "updateUserServlet", value = "/updateUserServlet")
public class updateUserServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
this.doPost(request, response);
}
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//1.设置编码
request.setCharacterEncoding("utf-8");
//2.获取map
Map<String, String[]> map = request.getParameterMap();
//3.封装对象
User1 user1 = new User1();
try {
BeanUtils.populate(user1, map);
} catch (IllegalAccessException e) {
throw new RuntimeException(e);
} catch (InvocationTargetException e) {
throw new RuntimeException(e);
}
//4.调用service修改
UserService service = new UserServiceImpl();
service.updateUser(user1);
//5.跳转到查询所有Servlet
response.sendRedirect(request.getContextPath()+"/userListServlet");
}
}
标签：功能,删除,User1,user1,public,修改,import,com,id From： https://www.cnblogs.com/qihaokuan/p/17006392.html