JSP实现添加图书、修改图书以及删除图书
来源：互联网 发布：m1a2和豹2知乎 编辑：程序博客网 时间：2024/05/18 01:14
所用软件：
1 myeclipse
2 mysql数据库
3 dbutils连接数据库
4 bootstrap前段框架
5 EL表达式+JSTL标签库
6 c3p0连接池
过滤器（filter)解决全站的字符乱码问题
添加书籍入页面：
查询书籍页面：
修改书籍界面：（注意要回显所要修改图书的数据）
工程目录：
bookServlet如下：
package com.hai.servlet;import java.io.IOException;import java.io.PrintWriter;import java.util.List;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import com.hai.dao.bookDao;import com.hai.domain.book;import com.hai.utils.WebUtils;public class bookServlet extends HttpServlet { public bookServlet() { super(); } public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String type = request.getParameter("type"); if (type.equalsIgnoreCase("charu")) { charu(request, response); } else if (type.equalsIgnoreCase("chaxun")) { chaxun(request, response); } else if (type.equalsIgnoreCase("shan")) { shanchu(request, response); } else if (type.equalsIgnoreCase("xiu01")) { xiugai01(request, response); } else if (type.equalsIgnoreCase("xiu02")) { xiugai02(request, response); } } private void xiugai02(HttpServletRequest request, //修改图书 HttpServletResponse response) { String id = request.getParameter("id"); String bookname = request.getParameter("bookname"); String author = request.getParameter("author"); String age = request.getParameter("age"); book shu = new book(); shu.setId(id); shu.setBooknamee(bookname); shu.setAuthorr(author); shu.setAgee(Integer.parseInt(age)); bookDao mm=new bookDao(); mm.xiugai(shu); try { response.getWriter().write("修改完毕!!!"); } catch (IOException e) { e.printStackTrace(); } } private void xiugai01(HttpServletRequest request, //用于回显该图书的数据 HttpServletResponse response) { String id = request.getParameter("id"); bookDao mmBookDao = new bookDao(); book shu = mmBookDao.chaxun(id); request.setAttribute("book", shu); try { request.getRequestDispatcher("/WEB-INF/xiugai.jsp").forward( request, response); } catch (ServletException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } private void shanchu(HttpServletRequest request, //删除图书 HttpServletResponse response) { String id = request.getParameter("id"); bookDao mm = new bookDao(); mm.shanchu(id); List<book> listt = mm.chaxun(); request.setAttribute("listt", listt); try { request.getRequestDispatcher("/chaxun.jsp").forward(request, response); } catch (ServletException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } private void chaxun(HttpServletRequest request, HttpServletResponse response) { //图书查询 bookDao mm = new bookDao(); List<book> listt = mm.chaxun(); request.setAttribute("listt", listt); try { request.getRequestDispatcher("/chaxun.jsp").forward(request, response); } catch (ServletException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } private void charu(HttpServletRequest request, HttpServletResponse response) { //添加图书 String bookname = request.getParameter("bookname"); String author = request.getParameter("author"); String age = request.getParameter("age"); book shu = new book(); shu.setId(WebUtils.makeID()); shu.setBooknamee(bookname); shu.setAuthorr(author); shu.setAgee(Integer.parseInt(age)); bookDao mm = new bookDao(); mm.charu(shu); try { response.getWriter().write("cha ru wan bi"); } catch (IOException e) { e.printStackTrace(); } } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); }}dao对象：
package com.hai.dao;import java.awt.print.Book;import java.util.List;import org.apache.commons.dbutils.QueryRunner;import org.apache.commons.dbutils.handlers.BeanHandler;import org.apache.commons.dbutils.handlers.BeanListHandler;import com.hai.domain.book;import com.hai.utils.JdbcUtils;public class bookDao { public void charu(book book){ //添加一本书 try{ QueryRunner runner = new QueryRunner(JdbcUtils.getDataSource()); String sql = "insert into book(id,booknamee,authorr,agee) values(?,?,?,?)"; Object params[] = {book.getId(),book.getBooknamee(),book.getAuthorr(),book.getAgee()}; runner.update(sql, params); }catch (Exception e) { throw new RuntimeException(e); } } public void xiugai(book book){//修改某本书 try{ QueryRunner runner = new QueryRunner(JdbcUtils.getDataSource()); String sql = "update book set booknamee=?,authorr=?,agee=? where id=? "; Object params[] = {book.getBooknamee(),book.getAuthorr(),book.getAgee(),book.getId()}; runner.update(sql, params); }catch (Exception e) { throw new RuntimeException(e); } } public void shanchu(String id){ //删除具体ID所对应的图书 try{ QueryRunner runner = new QueryRunner(JdbcUtils.getDataSource()); String sql = "delete from book where id=?"; runner.update(sql, id); }catch (Exception e) { throw new RuntimeException(e); } } public List<book> chaxun(){ //查询所有图书 try{ QueryRunner runner = new QueryRunner(JdbcUtils.getDataSource()); String sql = "select * from book"; List<book> listt= (List<book>) runner.query(sql, new BeanListHandler(book.class)); return listt; }catch (Exception e) { throw new RuntimeException(e); } } public book chaxun(String id){ //查询具体ID所对应的书 try{ QueryRunner runner = new QueryRunner(JdbcUtils.getDataSource()); String sql = "select * from book where id=?"; book shu= (book) runner.query(sql,id,new BeanHandler(book.class)); return shu; }catch (Exception e) { throw new RuntimeException(e); } } }封装book的数据实体（domain):
package com.hai.domain;public class book { private String id;private String booknamee;private String authorr;private int agee;public String getBooknamee() { return booknamee;}public void setBooknamee(String booknamee) { this.booknamee = booknamee;}public String getId() { return id;}public void setId(String id) { this.id = id;}public String getAuthorr() { return authorr;}public void setAuthorr(String authorr) { this.authorr = authorr;}public int getAgee() { return agee;}public void setAgee(int agee) { this.agee = agee;}}解决全站字符编码的过滤器：
package com.hai.filters;import java.io.BufferedReader;import java.io.IOException;import java.io.UnsupportedEncodingException;import java.security.Principal;import java.util.Enumeration;import java.util.Locale;import java.util.Map;import javax.servlet.Filter;import javax.servlet.FilterChain;import javax.servlet.FilterConfig;import javax.servlet.RequestDispatcher;import javax.servlet.ServletException;import javax.servlet.ServletInputStream;import javax.servlet.ServletRequest;import javax.servlet.ServletResponse;import javax.servlet.http.Cookie;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletRequestWrapper;import javax.servlet.http.HttpServletResponse;import javax.servlet.http.HttpSession;//为解决全站乱码public class character implements Filter { public void destroy() { // TODO Auto-generated method stub } public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws IOException, ServletException { HttpServletRequest request = (HttpServletRequest) req; HttpServletResponse response = (HttpServletResponse) resp; request.setCharacterEncoding("utf-8"); response.setCharacterEncoding("utf-8"); response.setContentType("text/html;charset=utf-8"); MyCharacterEncodingRequest requestWrapper = new MyCharacterEncodingRequest( request); chain.doFilter(requestWrapper, response); } public void init(FilterConfig filterConfig) throws ServletException { // TODO Auto-generated method stub }}/* * 1.实现与被增强对象相同的接口 2、定义一个变量记住被增强对象 3、定义一个构造器，接收被增强对象 4、覆盖需要增强的方法 * 5、对于不想增强的方法，直接调用被增强对象（目标对象）的方法 */class MyCharacterEncodingRequest extends HttpServletRequestWrapper { private HttpServletRequest request; public MyCharacterEncodingRequest(HttpServletRequest request) { super(request); this.request = request; } @Override public String getParameter(String name) { try { String value = this.request.getParameter(name); if (value == null) { return null; } if (!this.request.getMethod().equalsIgnoreCase("get")) { return value; } value = new String(value.getBytes("ISO8859-1"), this.request.getCharacterEncoding()); return value; } catch (Exception e) { throw new RuntimeException(e); } }}web.xml
<?xml version="1.0" encoding="UTF-8"?><web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"> <display-name></display-name> <filter> <filter-name>haitao</filter-name> <filter-class>com.hai.filters.character</filter-class> </filter> <filter-mapping> <filter-name>haitao</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <servlet> <description>This is the description of my J2EE component</description> <display-name>This is the display name of my J2EE component</display-name> <servlet-name>bookServlet</servlet-name> <servlet-class>com.hai.servlet.bookServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>bookServlet</servlet-name> <url-pattern>/servlet/bookServlet</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list></web-app>提供连接池的工具类：
package com.hai.utils;import java.sql.Connection;import java.sql.SQLException;import javax.sql.DataSource;import com.mchange.v2.c3p0.ComboPooledDataSource;public class JdbcUtils { private static DataSource ds = null; static{ ds = new ComboPooledDataSource(); } public static DataSource getDataSource(){ return ds; } public static Connection getConnection() throws SQLException{ return ds.getConnection(); }}UUID字符串类：
package com.hai.utils;import java.util.UUID;public class WebUtils { public static String makeID(){ return UUID.randomUUID().toString(); }}c3p0-config.xml 如下：
<?xml version="1.0" encoding="UTF-8"?><c3p0-config> <default-config> <property name="driverClass">com.mysql.jdbc.Driver</property> <property name="jdbcUrl">jdbc:mysql://localhost:3306/xuhaitao</property> <property name="user">root</property> <property name="password">root</property> <property name="acquireIncrement">5</property> <property name="initialPoolSize">10</property> <property name="minPoolSize">5</property> <property name="maxPoolSize">20</property> </default-config> <named-config name="flx"> <property name="driverClass">com.mysql.jdbc.Driver</property> <property name="jdbcUrl">jdbc:mysql://localhost:3306/day16</property> <property name="user">root</property> <property name="password">root</property> <property name="acquireIncrement">50</property> <property name="initialPoolSize">100</property> <property name="minPoolSize">50</property> <property name="maxPoolSize">1000</property><!-- intergalactoApp adopts a different approach to configuring statement caching --> </named-config></c3p0-config>charu.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><title>My JSP 'charu.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="css/bootstrap.min.css"><link rel="stylesheet" type="text/css" href="css/style.min.css"><script type="text/javascript" src="js/jquery-2.1.1.js"></script><script type="text/javascript" src="js/bootstrap.min.js"></script></head><body class="container"> <form method="post" action="${pageContext.request.contextPath}/servlet/bookServlet?type=charu"> <div class="form-group"> <label class="control-label">书名：</label> <input type="text" class="form-control" name="bookname" /> </div> <div class="form-group"> <label class="control-label">作者：</label> <input type="text" class="form-control" name="author" /> </div> <div class="form-group"> <label class="control-label">年龄：</label> <input type="text" class="form-control" name="age" /> </div> <div class="form-group"> <input type="submit" value="提交" class="btn btn-primary" /> </div> </form></body></html>chaxun.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%><%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><title>My JSP 'chaxun.jsp' starting page</title><meta http-equiv="pragma" content="no-cache"><meta http-equiv="cache-control" content="no-cache"><meta http-equiv="expires" content="0"><meta http-equiv="keywords" content="keyword1,keyword2,keyword3"><meta http-equiv="description" content="This is my page"><link rel="stylesheet" href="http://cdn.static.runoob.com/libs/bootstrap/3.3.7/css/bootstrap.min.css"><script src="http://cdn.static.runoob.com/libs/jquery/2.1.1/jquery.min.js"></script><script src="http://cdn.static.runoob.com/libs/bootstrap/3.3.7/js/bootstrap.min.js"></script><style type="text/css">td{ vertical-align: middle !important;}</style></head><body class="container"> <table class="table"> <tr> <td style="padding:30px;">书名</td> <td style="padding:30px;">作者</td> <td style="padding:30px;">年龄</td> <td style="padding:30px;" align="left">操作</td> </tr> <c:forEach var="mm" items="${listt }"> <tr> <td style="padding:30px;">${mm.booknamee }</td> <td style="padding:30px;">${mm.authorr}</td> <td style="padding:30px;">${mm.agee }</td> <td align="left" style="padding-left:25px;"><a class="btn btn-primary btn-sm" href="${pageContext.request.contextPath}/servlet/bookServlet?type=shan&id=${mm.id}">删除</a><br> <a style="margin-top:5px;" class="btn btn-primary btn-sm" href="${pageContext.request.contextPath}/servlet/bookServlet?type=xiu01&id=${mm.id}"">修改</a> </td> </tr> </c:forEach> </table></body></html>xiugai.jsp如下：
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head> <title>My JSP 'xiugai.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"><link rel="stylesheet" href="http://cdn.static.runoob.com/libs/bootstrap/3.3.7/css/bootstrap.min.css"><script src="http://cdn.static.runoob.com/libs/jquery/2.1.1/jquery.min.js"></script><script src="http://cdn.static.runoob.com/libs/bootstrap/3.3.7/js/bootstrap.min.js"></script> </head> <body class="container"> <form method="post" action="${pageContext.request.contextPath}/servlet/bookServlet?type=xiu02&id=${book.id}"> <div class="form-group"> <label class="control-label">书名：</label> <input type="text" class="form-control" name="bookname" value="${book.booknamee }"/> </div> <div class="form-group"> <label class="control-label">作者：</label> <input type="text" class="form-control" name="author" value="${book.authorr }" /> </div> <div class="form-group"> <label class="control-label">年龄：</label> <input type="text" class="form-control" name="age" value="${book.agee }"/> </div> <div class="form-group"> <input type="submit" value="提交" class="btn btn-primary" /> </div> </form> </body></html>FR:海涛高软（QQ技术交流群：386476712）
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