SSH实现的增删改查实例

zxingchao2005

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一.整合步骤

1.通过MyEclipse向导，添加struts功能

2.通过MyEclipse向导，添加Hibernate3功能：生成会话工厂的那个步骤中一定要将那个对号要去掉，不能由hibernate来生成，而是交给Spring来生成；还有就是导入jar包的时候选择复制到lib目录下这一项。

3.通过MyEclipse向导，导入实现Spring功能，注意导入jar包的时候选择复制到lib目录下这一项。

3.利用MyEclipse反向工程的方法，以Spring<dao>生成dao对象的方式创建Hibernate DAO，相关POJO及其xxx.hbm.xml。

4. DAO实现类加入@Transactional标记。

5. 修改applicationContext.xml文件，增加Spring事务管理、DAO等bean的配置。

6. 编写action类。

7. 在applicationContext.xml文件中添加Action的代理bean。

8. 在struts的配置文件中，添加相应的Action，类名指向Spring中的代理bean，并加入<controller processorClass="org.springframework.web.struts.DelegatingRequestProcessor" />和<plug-in className="org.springframework.web.struts.ContextLoaderPlugIn">
<set-property property="contextConfigLocation"
value="/WEB-INF/classes/applicationContext.xml" />
</plug-in>。

9. 编写Jsp文件。

10. 发布web项目。

11. 启动web服务器，运行项目

二.SSH实现关于书籍增删改查实例

1.创建mysql数据库及其表

create database book;

create table book(id int not null primary key auto_increment,bookname varchar(30),bookauthor varchar(30));

2.表现层

(1)index.jsp(首页)

<%@ page language="java" pageEncoding="GBK" %> <%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html:html lang="true"> <head> <html:base/><title>欢迎</title> </head> <body> <a href="book.do?method=listbook" mce_href="book.do?method=listbook">查看书籍列表</a><br> </body> </html:html>

(2)list.jsp(书籍列表页面)

<%@ page contentType="text/html;charset=GBK" isELIgnored="false"%> <%-- 我们使用 JSTL 来访问数据 --%> <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %> <% 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>书籍列表页面</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <mce:style></mce:style><style mce_bogus="1">/* 给链接加入鼠标移过变色和去除下划线功能 */ a:hover { color: red; text-decoration: none }</style> </head> <body> <b>书籍列表页面</b> <br> <%-- 输出用户列表 --%> <br> <c:choose> <c:when test="${not empty books}"> <table width="80%" border="1" cellpadding="0" style="border-collapse: collapse;" bordercolor="#000000"> <tr> <td> <b>书籍ID</b> </td> <td> <b>书籍名称</b> </td> <td> <b>作者</b> </td> <td> <b>价格</b> </td> <td> <b>操作</b> </td> </tr> <c:forEach items="${books}" var="book"> <tr> <td> ${book.id} </td> <td> ${book.bookname} </td> <td> ${book.bookauthor} </td> <td> ${book.bookprice} </td> <td> <a href="<%=path%>/book.do?method=modifybook&id=${book.id}">修改</a> <a href="<%=path%>/book.do?method=deletebook&id=${book.id}">删除</a> </td> </tr> </c:forEach> </table> </c:when> <c:otherwise>抱歉,没有找到相关的记录!</c:otherwise> </c:choose> <a href="<%=path%>/new.jsp">添加书籍</a> <form action="<%=path%>/book.do?method=searchbook" method="post" onsubmit="return checkSearchForm(this);"> <fieldset> <legend> 查找书籍 </legend> 书籍名: <input name="bookname"> <input type="submit" value="查找"> </fieldset> </form> </body> </html>

(3)new.jsp(新增书籍页面)

<%@ page language="java" pageEncoding="GBK"%> <%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean"%> <%@ taglib uri="http://struts.apache.org/tags-html" prefix="html"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>添加书籍</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <mce:script type="text/javascript" src="js/form.js" mce_src="js/form.js"></mce:script> </head> <body> <h3> 添加书籍 </h3> <form action="<%=request.getContextPath()%>/book.do?method=addbook" onsubmit="return checkForm(this);" method="post"> <table width="100%" border="0"> <tbody> <tr> <td> 书籍名： </td> <td> <input name="bookname"/> <br> </td> </tr> <tr> <td> 作者: </td> <td> <input name="bookauthor"/> </td> </tr> <tr> <td> 价格： </td> <td> <input name="bookprice"/> </td> </tr> <tr> <td> <input type="submit" value="添加" name="button1"> </td> <td> <input type="Reset" value="重填" name="button2"> </td> </tr> </tbody> </table> </form> <input type="button" onclick="document.location='<%=request.getContextPath()%>/book.do?method=listbook';" value=" 返回列表"> </body> </html>

(4)edit.jsp(书籍修改页面)

<%@ page language="java" pageEncoding="GBK" isELIgnored="false"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>修改书籍</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <mce:script type="text/javascript" src="js/form.js" mce_src="js/form.js"></mce:script> </head> <body> <h3> 修改书籍 </h3> <form action="<%=request.getContextPath()%>/book.do?method=updatebook" onsubmit="return checkForm(this);" method="post"> <input type="hidden" value="${book.id}" name="id"/> <table width="100%" border="0"> <tbody> <tr> <td> 书籍名： </td> <td> <input name="bookname" value="${book.bookname}"/> <br> </td> </tr> <tr> <td> 作者: </td> <td> <input name="bookauthor" value="${book.bookauthor}"/> </td> </tr> <tr> <td> 价格： </td> <td> <input name="bookprice" value="${book.bookprice}"/> </td> </tr> <tr> <td> <input type="submit" value="提交" > </td> <td> <input type="reset" value="重填"> </td> </tr> </tbody> </table> </form> <input type="button" onclick="document.location='book.do?method=listbook';" value="返回列表"> </body> </html>

(5)error.jsp(错误公用页面)

<%@ page language="java" pageEncoding="GBK" isELIgnored="false"%> <% 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>出错了！</title> </head> <body> 出错了！<br/> 详细信息是：<br/> ${message}<br/><br/> <a href="javascript:history.back();" mce_href="javascript:history.back();">返回</a> </body> </html>

(6)form.js

// 验证表单输入不为空的脚本代码 function checkForm(form) { if (form.bookname.value == "") { alert("书名不能为空!"); form.bookname.focus(); return false; } if (form.bookauthor.value == "") { alert("作者不能为空!"); form.bookauthor.focus(); return false; } if (form.bookprice.value == "") { alert("价格不能为空!"); form.bookprice.focus(); return false; } return true; } function checkSearchForm(form){ if(form.bookname.value.match(/^/s*$/)){ alert("查询条件不能为空!"); form.bookname.focus(); return false; } return true; }

3.公用类及其javabean

(1)EncodingFilter.java(过滤器)

package filter; import java.io.IOException; import javax.servlet.Filter; import javax.servlet.FilterChain; import javax.servlet.FilterConfig; import javax.servlet.ServletException; import javax.servlet.ServletRequest; import javax.servlet.ServletResponse; public class EncodingFilter implements Filter { protected FilterConfig config; protected String Encoding = null; public void init(FilterConfig config) throws ServletException { this.config = config; this.Encoding = config.getInitParameter("Encoding"); } public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { if (request.getCharacterEncoding() == null) { if (Encoding != null) { request.setCharacterEncoding(Encoding); response.setCharacterEncoding(Encoding); } } chain.doFilter(request, response); } public void destroy() { } }

(2)book.java

package dao; /** * Book entity. @author MyEclipse Persistence Tools */ public class Book implements java.io.Serializable { // Fields private Integer id; private String bookname; private String bookauthor; private Float bookprice; // Constructors /** default constructor */ public Book() { } /** full constructor */ public Book(String bookname, String bookauthor, Float bookprice) { this.bookname = bookname; this.bookauthor = bookauthor; this.bookprice = bookprice; } // Property accessors public Integer getId() { return this.id; } public void setId(Integer id) { this.id = id; } public String getBookname() { return this.bookname; } public void setBookname(String bookname) { this.bookname = bookname; } public String getBookauthor() { return this.bookauthor; } public void setBookauthor(String bookauthor) { this.bookauthor = bookauthor; } public Float getBookprice() { return this.bookprice; } public void setBookprice(Float bookprice) { this.bookprice = bookprice; } }

4.DAO层

BookDAO.java

package dao; import java.util.List; import org.hibernate.LockMode; import org.hibernate.Query; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import org.springframework.orm.hibernate3.support.HibernateDaoSupport; import org.springframework.transaction.annotation.Transactional; /** * A data access object (DAO) providing persistence and search support for Book * entities. Transaction control of the save(), update() and delete() operations * can directly support Spring container-managed transactions or they can be * augmented to handle user-managed Spring transactions. Each of these methods * provides additional information for how to configure it for the desired type * of transaction control. * * @see dao.Book * @author MyEclipse Persistence Tools */ @Transactional public class BookDAO extends HibernateDaoSupport { private static final Logger log = LoggerFactory.getLogger(BookDAO.class); // property constants public static final String BOOKNAME = "bookname"; public static final String BOOKAUTHOR = "bookauthor"; public static final String BOOKPRICE = "bookprice"; protected void initDao() { // do nothing } public void save(Book transientInstance) { log.debug("saving Book instance"); try { getHibernateTemplate().save(transientInstance); log.debug("save successful"); } catch (RuntimeException re) { log.error("save failed", re); throw re; } } public void update(Book transientInstance) { log.debug("saving Book instance"); try { getHibernateTemplate().update(transientInstance); log.debug("save successful"); } catch (RuntimeException re) { log.error("save failed", re); throw re; } } public void delete(Book persistentInstance) { log.debug("deleting Book instance"); try { getHibernateTemplate().delete(persistentInstance); log.debug("delete successful"); } catch (RuntimeException re) { log.error("delete failed", re); throw re; } } public Book findById(java.lang.Integer id) { log.debug("getting Book instance with id: " + id); try { Book instance = (Book) getHibernateTemplate().get("dao.Book", id); return instance; } catch (RuntimeException re) { log.error("get failed", re); throw re; } } public List findByExample(Book instance) { log.debug("finding Book instance by example"); try { List results = getHibernateTemplate().findByExample(instance); log.debug("find by example successful, result size: " + results.size()); return results; } catch (RuntimeException re) { log.error("find by example failed", re); throw re; } } public List findByProperty(String propertyName, Object value) { log.debug("finding Book instance with property: " + propertyName + ", value: " + value); try { String queryString = "from Book as model where model." + propertyName + "like = "; return getHibernateTemplate().find(queryString, value); } catch (RuntimeException re) { log.error("find by property name failed", re); throw re; } } public List findByBookname(String bookname) { String sql="from Book where bookname like '%"+bookname+"%'"; Query query=this.getSession().createQuery(sql); return query.list(); } public List findByBookauthor(Object bookauthor) { return findByProperty(BOOKAUTHOR, bookauthor); } public List findByBookprice(Object bookprice) { return findByProperty(BOOKPRICE, bookprice); } public List findAll() { log.debug("finding all Book instances"); try { String queryString = "from Book"; return getHibernateTemplate().find(queryString); } catch (RuntimeException re) { log.error("find all failed", re); throw re; } } public Book merge(Book detachedInstance) { log.debug("merging Book instance"); try { Book result = (Book) getHibernateTemplate().merge(detachedInstance); log.debug("merge successful"); return result; } catch (RuntimeException re) { log.error("merge failed", re); throw re; } } public void attachDirty(Book instance) { log.debug("attaching dirty Book instance"); try { getHibernateTemplate().saveOrUpdate(instance); log.debug("attach successful"); } catch (RuntimeException re) { log.error("attach failed", re); throw re; } } public void attachClean(Book instance) { log.debug("attaching clean Book instance"); try { getHibernateTemplate().lock(instance, LockMode.NONE); log.debug("attach successful"); } catch (RuntimeException re) { log.error("attach failed", re); throw re; } } public static BookDAO getFromApplicationContext(ApplicationContext ctx) { return (BookDAO) ctx.getBean("BookDAO"); } public static void main(String[] args) { ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml"); BookDAO dao = (BookDAO)ctx.getBean("BookDAO"); Book book = new Book(); book.setBookname("数学"); book.setBookauthor("张三"); book.setBookprice(12.0f); dao.save(book); } }

5.service层

(1)IBookManager.java(接口)

package service; import java.util.List; import dao.Book; public interface IBookManager { /** * 根据ID查找用户信息。 * * @param id * 用户编号 * @return 找到的用户对象，找不到时返回null */ public Book findById(int id); /** * 更新用户对象。 * * @param Book * 被更新的用户 * @return 更新成功与否 */ public boolean update(Book Book); public boolean save(Book Book); /** * 删除用户对象。 * * @param Book * 被删除的用户 * @return 删除成功与否 */ public boolean delete(Book Book); /** * 根据用户名查找用户。 * * @param username * 用户名 * @return 包含此用户名的用户列表 */ public List<Book> findByBookname(String username); public List findAll(); }

(2)BookManager.java(实现类)

package service; import java.util.List; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import dao.Book; import dao.BookDAO; public class BookManager implements IBookManager { private BookDAO bookdao; public boolean delete(Book book) { try { bookdao.delete(book); return true; } catch (Exception e) { } return false; } public Book findById(int id) { return bookdao.findById(id); } public List findAll(){ return bookdao.findAll(); } public List<Book> findByBookname(String bookname) { return bookdao.findByBookname(bookname); } public boolean update(Book Book) { try { bookdao.update(Book); return true; } catch (Exception e) { } return false; } public boolean save(Book Book){ try { bookdao.save(Book); return true; } catch (Exception e) { } return false; } public dao.BookDAO getBookdao() { return bookdao; } public void setBookdao(dao.BookDAO bookdao) { this.bookdao = bookdao; } }

6.Action处理

(1)BookForm.java

package com.zxc.struts.form; import org.apache.struts.action.ActionForm; public class BookForm extends ActionForm{ private int id; private String bookname; private String bookauthor; private float bookprice; public int getId() { return id; } public void setId(int id) { this.id = id; } public String getBookname() { return bookname; } public void setBookname(String bookname) { this.bookname = bookname; } public String getBookauthor() { return bookauthor; } public void setBookauthor(String bookauthor) { this.bookauthor = bookauthor; } public float getBookprice() { return bookprice; } public void setBookprice(float bookprice) { this.bookprice = bookprice; } }

(2)BookAction.java

/* * Generated by MyEclipse Struts * Template path: templates/java/JavaClass.vtl */ package com.zxc.struts.action; import java.util.List; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.struts.action.ActionForm; import org.apache.struts.action.ActionForward; import org.apache.struts.action.ActionMapping; import org.apache.struts.actions.DispatchAction; import service.IBookManager; import com.zxc.struts.form.BookForm; import dao.Book; /** * MyEclipse Struts * Creation date: 10-01-2010 * * XDoclet definition: * @struts.action validate="true" */ public class BookAction extends DispatchAction { private IBookManager bookManager; public ActionForward addbook(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) { // TODO Auto-generated method stub BookForm bookForm=(BookForm)form; Book book=new Book(); book.setBookname(bookForm.getBookname()); book.setBookauthor(bookForm.getBookauthor()); book.setBookprice(bookForm.getBookprice()); bookManager.save(book); return listbook(mapping,form,request,response); } public ActionForward updatebook(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) { // TODO Auto-generated method stub BookForm bookForm=(BookForm)form; String id=request.getParameter("id"); Book book=bookManager.findById(Integer.parseInt(id)); book.setBookname(bookForm.getBookname()); book.setBookauthor(bookForm.getBookauthor()); book.setBookprice(bookForm.getBookprice()); if(bookManager.update(book)){ return listbook(mapping,form,request,response); }else{ String message="更新失败!"; request.setAttribute("message", message); return mapping.findForward("message"); } } public ActionForward modifybook(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) { // TODO Auto-generated method stub String id=request.getParameter("id"); Book book=bookManager.findById(Integer.parseInt(id)); request.setAttribute("book", book); return mapping.findForward("edit"); } public ActionForward deletebook(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) { // TODO Auto-generated method stub String id=request.getParameter("id"); Book book=bookManager.findById(Integer.parseInt(id)); if(bookManager.delete(book)){ return listbook(mapping,form,request,response); }else{ String message="删除失败!"; request.setAttribute("message", message); return mapping.findForward("message"); } } public ActionForward listbook(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) { // TODO Auto-generated method stub List books=bookManager.findAll(); request.setAttribute("books", books); return mapping.findForward("list"); } public ActionForward searchbook(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) { // TODO Auto-generated method stub String bookname=request.getParameter("bookname"); List books=bookManager.findByBookname(bookname); request.setAttribute("books", books); return mapping.findForward("list"); } public void setBookManager(IBookManager bookManager) { this.bookManager = bookManager; } public IBookManager getBookManager() { return bookManager; } }

7.配置文件

(1)log4j.properties

log4j.rootLogger=WARN, stdout log4j.appender.stdout=org.apache.log4j.ConsoleAppender log4j.appender.stdout.layout=org.apache.log4j.PatternLayout log4j.appender.stdout.layout.ConversionPattern=%d %p [%c] - %m%n

(2)hibernate.cfg.xml

<?xml version='1.0' encoding='UTF-8'?> <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">  <hibernate-configuration> <session-factory> <property name="dialect"> org.hibernate.dialect.MySQLDialect </property> <property name="connection.url"> jdbc:mysql://localhost:3306/book </property> <property name="connection.username">root</property> <property name="connection.password">123</property> <property name="connection.driver_class"> com.mysql.jdbc.Driver </property> <property name="myeclipse.connection.profile">mysql5</property> <mapping resource="dao/Book.hbm.xml" /> </session-factory> </hibernate-configuration>

(3)book.hbm.xml

<?xml version="1.0" encoding="utf-8"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">  <hibernate-mapping> <class name="dao.Book" table="book" catalog="book"> <id name="id" type="java.lang.Integer"> <column name="id" /> <generator class="increment" /> </id> <property name="bookname" type="java.lang.String"> <column name="bookname" length="30" /> </property> <property name="bookauthor" type="java.lang.String"> <column name="bookauthor" length="30" /> </property> <property name="bookprice" type="java.lang.Float"> <column name="bookprice" precision="12" scale="0" /> </property> </class> </hibernate-mapping>

(4)struts-config.xml

<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.3//EN" "http://struts.apache.org/dtds/struts-config_1_3.dtd"> <struts-config> <form-beans> <form-bean name="bookForm" type="com.zxc.struts.form.BookForm"/> </form-beans> <global-exceptions /> <global-forwards /> <action-mappings > <action path="/book" name="bookForm" parameter="method" type="com.zxc.struts.action.BookAction" cancellable="true" > <forward name="list" path="/list.jsp"/> <forward name="edit" path="/edit.jsp"/> <forward name="message" path="/error.jsp"/> </action> </action-mappings> <controller processorClass="org.springframework.web.struts.DelegatingRequestProcessor" /> <message-resources parameter="com.zxc.struts.ApplicationResources" /> <plug-in className="org.springframework.web.struts.ContextLoaderPlugIn"> <set-property property="contextConfigLocation" value="/WEB-INF/classes/applicationContext.xml" /> </plug-in> </struts-config>

(5)applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd "> <tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="true" /> <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> <property name="configLocation" value="classpath:hibernate.cfg.xml"> </property> </bean> <bean id="BookDAO" class="dao.BookDAO"> <property name="sessionFactory"> <ref bean="sessionFactory" /> </property> </bean>  <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager"> <property name="sessionFactory"> <ref local="sessionFactory" /> </property> </bean>  <bean id="bookManager" class="service.BookManager"> <property name="bookdao"> <ref local="BookDAO"/> </property> </bean> <bean name="/book" class="com.zxc.struts.action.BookAction"> <property name="bookManager"> <ref local="bookManager"/> </property> </bean> </beans>

(6)web.xml

<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.5" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <servlet> <servlet-name>action</servlet-name> <servlet-class>org.apache.struts.action.ActionServlet</servlet-class> <init-param> <param-name>config</param-name> <param-value>/WEB-INF/struts-config.xml</param-value> </init-param> <init-param> <param-name>debug</param-name> <param-value>3</param-value> </init-param> <init-param> <param-name>detail</param-name> <param-value>3</param-value> </init-param> <load-on-startup>0</load-on-startup> </servlet> <servlet-mapping> <servlet-name>action</servlet-name> <url-pattern>*.do</url-pattern> </servlet-mapping>  <filter> <filter-name>Filter</filter-name> <filter-class> filter.EncodingFilter </filter-class> <init-param> <param-name>Encoding</param-name> <param-value>gbk</param-value> </init-param> </filter> <filter-mapping> <filter-name>Filter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> </web-app>

三.运行效果