bm.java
package bean;
public class bm {
private int b_id;
private String b_name;
private String b_author;
private String b_time;
private int b_type;
public bm() {
super();
}
public bm(int b_id,String b_name, String b_author, String b_time,
int b_type) {
super();
this.b_id=b_id;
this.b_name = b_name;
this.b_author = b_author;
this.b_time = b_time;
this.b_type = b_type;
}
public int getB_id() {
return b_id;
}
public void setB_id(int b_id) {
this.b_id = b_id;
}
public String getB_name() {
return b_name;
}
public void setB_name(String b_name) {
this.b_name = b_name;
}
public String getB_author() {
return b_author;
}
public void setB_author(String b_author) {
this.b_author = b_author;
}
public String getB_time() {
return b_time;
}
public void setB_time(String b_time) {
this.b_time = b_time;
}
public int getB_type() {
return b_type;
}
public void setB_type(int b_type) {
this.b_type = b_type;
}
}
BaseDao.java
package dao;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class BaseDao {
//获取连接
protected Connection getConnection(){
Connection conn=null;
try {
Class.forName("com.mysql.jdbc.Driver");
// 2.建立连接
conn = DriverManager.getConnection(
"jdbc:mysql://localhost:3306/mysql", "root", "root");
} catch (Exception e) {
e.printStackTrace();
}
return conn;
}
//关闭连接
protected void closeAll(Connection con,PreparedStatement ps,ResultSet rs){
try {
if(rs != null)
rs.close();
if(ps != null)
ps.close();
if(con != null)
con.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
bmDao.java
package dao;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import bean.bm;
public class bmDao extends BaseDao{
public List<bm> selectall() {
ArrayList<bm> list = new ArrayList<bm>();
Connection conn = null;
PreparedStatement ps =null;
ResultSet rs = null;
try {
conn = getConnection();
String sql = "select * from bookmanage";
ps = conn.prepareStatement(sql);
rs = ps.executeQuery();
while(rs.next()){
bm b = new bm();
b.setB_id(rs.getInt(1));
b.setB_name(rs.getString(2));
b.setB_author(rs.getString(3));
b.setB_time(rs.getString(4));
b.setB_type(rs.getInt(5));
list.add(b);
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
closeAll(conn, ps, rs);
}
return list;
}
public int add(bm b){
Connection conn=getConnection();
String sql="add into bm (b_id,b_name,b_author,b_time,b_type)values(?,?,?,?)";
PreparedStatement ps=null;
int i=0;
try {
ps=conn.prepareStatement(sql);
ps.setInt(1,b.getB_id());
ps.setString(2,b.getB_name());
ps.setString(3, b.getB_author());
ps.setString(4, b.getB_time());
ps.setInt(5, b.getB_type());
i=ps.executeUpdate();//返回受影响的行数
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally{
closeAll(conn, ps, null);
}
return i;
}
public int delete(int b_id){
Connection conn=getConnection();
String sql="delete from bm where b_id = ?";
PreparedStatement ps=null;
int i=0;
try {
ps=conn.prepareStatement(sql);
ps.setInt(1, b_id);
i=ps.executeUpdate();//返回受影响的行数
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally{
closeAll(conn, ps, null);
}
return i;
}
}
index.jsp
<%@page import="bean.bm"%>
<%@page import="dao.bmDao"%>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<html>
<body>
<table cellspacing="0" border="1px" width="549" height="66" style="margin: 0pt auto;">
<tr>
<th>id</th>
<th>图书名称</th>
<th>图书作者</th>
<th>购买时间</th>
<th>图书分类</th>
<th>操作</th>
</tr>
<%
bmDao bd = new bmDao();
List<bm> list = bd.selectall();
%>
<%for(bm b:list){ %>
<tr>
<td><%b.getB_id(); %></td>
<td><%b.getB_name(); %></td>
<td><%b.getB_author() ;%></td>
<td><%b.getB_time() ;%></td>
<td><%b.getB_type(); %></td>
<td><a href="delete.jsp?b_id=<%=b.getB_id()%>">删除</a></td>
</tr>
<%} %>
</table>
<h2><a href="add.jsp">添加书籍</a></h2>
</body>
</html>
add.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<html>
<body>
<form action="doadd.jsp">
<h2>新增书籍信息</h2>
图书名称：<input type="text" name = "b_name">
</br>
图书作者：<input type="text" name = "b_author">
</br>
购买日期<input type="text" name = "b_time">yyyy-Mm-dd格式
</br>
图书类别：<select name="b_type">
<option value="0">请选择所属分类</option>
<option value="1">抒情/传记</option>
<option value="2">悬疑/惊悚</option>
<option value="3">名著</option>
</select>
</br>
<input type="submit" value="增加书籍">
</form>
</body>
</html>
doadd.jsp
<%@page import="dao.bmDao"%>
<%@page import="bean.bm"%>
<%@page import="java.text.SimpleDateFormat"%>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<html>
<body>
<%
int b_type = Integer.parseInt(request.getParameter("b_type"));
String b_name = request.getParameter("b_name");
String b_author= request.getParameter("b_author");
String b_time = request.getParameter("b_time");
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Date time = sdf.parse(b_time);
bm b = new bm();
b.setB_type(b_type);
b.setB_author(b_author);
b.setB_name(b_name);
b.setB_time(b_time);
bmDao bd = new bmDao();
bd.add(b);
response.sendRedirect("add.jsp");
%>
</body>
</html>
delete.jsp
<%@page import="dao.bmDao"%>
<%@page import="bean.bm"%>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP ‘delete.jsp‘ starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<div align="center"><%
int b_id = Integer.parseInt(request.getParameter("b_id"));
bmDao bd = new bmDao();
bd.delete(b_id);
response.sendRedirect("index.jsp");
%> <br>
</div></body>
</html>
原文：https://www.cnblogs.com/shenyangkeji/p/14772472.html