添加功能，删除功能，修改功能
添加功能
分析：
list.jsp：进行修改一下
add.jsp：
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<!-- HTML5文档-->
<!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>添加用户</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>
</head>
<body>
<div class="container">
<center><h3>添加联系人页面</h3></center>
<form action="${pageContext.request.contextPath}/addUserServlet" method="post">
<div class="form-group">
<label for="name">姓名：</label>
<input type="text" class="form-control" id="name" name="name" placeholder="请输入姓名">
</div>
<div class="form-group">
<label>性别：</label>
<input type="radio" name="gender" value="男" checked="checked"/>男
<input type="radio" name="gender" value="女"/>女
</div>
<div class="form-group">
<label for="age">年龄：</label>
<input type="text" class="form-control" id="age" name="age" placeholder="请输入年龄">
</div>
<div class="form-group">
<label for="address">籍贯：</label>
<select name="address" class="form-control" id="address">
<option value="峡西">峡西</option>
<option value="广西">广西</option>
<option value="湖南">湖南</option>
</select>
</div>
<div class="form-group">
<label for="qq">QQ：</label>
<input type="text" class="form-control" id="qq" name="qq" placeholder="请输入QQ号码"/>
</div>
<div class="form-group">
<label for="email">Email：</label>
<input type="text" class="form-control" id="email" name="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>
UserDao：添加一个方法
void add(User user);
UserDaoImpl：重写方法
@Override
public void add(User user) {
//定义sql
String sql = "insert into user values(null,?,?,?,?,?,?,null,null)";
//执行sql
template.update(sql,user.getName(),user.getGender(),user.getAge(),user.getAddress(),user.getQq(),user.getEmail());
}
UserService：
/**
* 保存User
* @param user
*/
void addUser(User user);
UserServiceImpl：
@Override
public void addUser(User user) {
dao.add(user);
}
AddUserServlet
@WebServlet("/addUserServlet")
public class AddUserServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//设置编码
request.setCharacterEncoding("utf-8");
//获取参数
Map<String, String[]> map = request.getParameterMap();
//封装对象
User user = new User();
try {
BeanUtils.populate(user,map);
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
//调用Service保存
UserServiceImpl service = new UserServiceImpl();
service.addUser(user);
//跳转到userListServlet
response.sendRedirect(request.getContextPath()+"/userListServlet");
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
this.doPost(request, response);
}
}
删除功能
分析：
list.jsp：进行修改：
UserDao：
void delete(int id);
UserDaoImpl：
@Override
public void delete(int id) {
//定义sql
String sql = "delete from user where id = ?";
//执行sql
template.update(sql,id);
}
UserService：
/**
* 根据id删除user
* @param id
*/
void deleteUser(String id);
UserServiceImpl
@Override
public void deleteUser(String id) {
dao.delete(Integer.parseInt(id));
}
delUserServlet实现：
@WebServlet("/delUserServlet")
public class delUserServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//获取id
String id = request.getParameter("id");
//调用service删除
UserServiceImpl service = new UserServiceImpl();
service.deleteUser(id);
//跳转到查询所有的Servlet
response.sendRedirect(request.getContextPath()+"/userListServlet");
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
this.doPost(request, response);
}
}
修改功能
分析：
信息的回显功能：
list.jsp：进行修改
UserDao：
User findById(int parseInt);
UserDaoImpl：
@Override
public User findById(int id) {
String sql = "select * from user where id=?";
return template.queryForObject(sql,new BeanPropertyRowMapper<User>(User.class),id);
}
UserService：
/**
* 根据id查询
* @param id
* @return
*/
User findUserById(String id);
UserServiceImpl：
@Override
public User findUserById(String id) {
return dao.findById(Integer.parseInt(id));
}
update.jsp：
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ 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="${pageContext.request.contextPath}/updateUserServlet" method="post">
<%--隐藏域 提交id--%>
<input type="hidden" name="id" value="${user.id}">
<div class="form-group">
<label for="name">姓名：</label>
<input type="text" class="form-control" id="name" name="name" value="${user.name}" readonly="readonly" placeholder="请输入姓名" />
</div>
<div class="form-group">
<label>性别：</label>
<c:if test="${user.gender=='男'}">
<input type="radio" name="gender" value="男" checked />男
<input type="radio" name="gender" value="女" />女
</c:if>
<c:if test="${user.gender=='女'}">
<input type="radio" name="gender" value="男" />男
<input type="radio" name="gender" value="女" checked />女
</c:if>
</div>
<div class="form-group">
<label for="age">年龄：</label>
<input type="text" class="form-control" id="age" value="${user.age}" name="age" placeholder="请输入年龄" />
</div>
<div class="form-group">
<label for="address">籍贯：</label>
<select name="address" id="address" class="form-control" >
<c:if test="${user.address=='北京'}">
<option value="北京" selected>北京</option>
<option value="河北">河北</option>
<option value="山西">山西</option>
</c:if>
<c:if test="${user.address=='河北'}">
<option value="北京">北京</option>
<option value="河北" selected>河北</option>
<option value="山西">山西</option>
</c:if>
<c:if test="${user.address=='山西'}">
<option value="北京">北京</option>
<option value="河北">河北</option>
<option value="山西" selected>山西</option>
</c:if>
</select>
</div>
<div class="form-group">
<label for="qq">QQ：</label>
<input type="text" id="qq" class="form-control" value="${user.qq}" name="qq" placeholder="请输入QQ号码"/>
</div>
<div class="form-group">
<label for="email">Email：</label>
<input type="text" id="email" class="form-control" value="${user.email}" name="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>
FindUserServlet：
复制代码 @WebServlet("/findUserServlet") public class FindUserServlet extends HttpServlet { protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //1.获取id String id = request.getParameter("id"); //调用Service查询 UserServiceImpl service = new UserServiceImpl(); User user = service.findUserById(id); //将user存入request request.setAttribute("user",user); //转发到update.jsp页面 request.getRequestDispatcher("/update.jsp").forward(request,response); } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doPost(request, response); } }
用户信息修改功能
UserDao：
void update(User user);
UserDaoImpl：
@Override
public void update(User user) {
String sql = "update user set name =?,gender=?,age=?,address=?,qq=?,email=? where id=?";
template.update(sql,user.getName(),user.getGender(),user.getAge(),user.getAddress(),user.getQq(),user.getEmail(),user.getId());
}
UserService：
/**
* 修改用户信息
* @param user
*/
void updateUser(User user);
UserServiceImpl：
@Override
public void updateUser(User user) {
dao.update(user);
}
UpdateUserServlet：
@WebServlet("/updateUserServlet")
public class UpdateUserServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//设置编码
request.setCharacterEncoding("utf-8");
//获取map
Map<String, String[]> map = request.getParameterMap();
//封装对象
User user = new User();
try {
BeanUtils.populate(user,map);
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
//调用Service修改
UserServiceImpl service = new UserServiceImpl();
service.updateUser(user);
//跳转到查询页面
response.sendRedirect(request.getContextPath()+"/userListServlet");
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
this.doPost(request, response);
}
}
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