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Java 整合模板彻底解决ssm配置难题

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SSM框架是spring MVC ，spring和mybatis框架的整合，是标准的MVC模式，将整个系统划分为表现层，controller层，service层，DAO层四层，使用spring MVC负责请求的转发和视图管理，spring实现业务对象管理，mybatis作为数据对象的持久化引擎

spring+springmvc+mybatis

环境配置
idea
mysql 5.7
tomcat 8.5
maven 3.6
创建数据库

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create database `ssmbuild`;
 
use `ssmbuild`;
 
drop table if exists `books`;
 
create table `books` (
`bookid` int(10) not null auto_increment comment '书id',
`bookname` varchar(100) not null comment '书名',
`bookcounts` int(11) not null comment '数量',
`detail` varchar(200) not null comment '描述',
key `bookid` (`bookid`)
) engine=innodb default charset=utf8
 
insert  into `books`(`bookid`,`bookname`,`bookcounts`,`detail`)values
(1,'java',1,'从入门到放弃'),
(2,'mysql',10,'从删库到跑路'),
(3,'linux',5,'从进门到进牢');

Java 整合模板彻底解决ssm配置难题

编写数据库对应的实体类com.longdi.pojo.books
导入lombok在pom.xml中

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package com.longdi.pojo;
 
import lombok.allargsconstructor;
import lombok.data;
import lombok.noargsconstructor;
 
/**
 * @author: 龍弟
 * @description
 * @date: 2021/9/27 20:22
 */
@data
@allargsconstructor
@noargsconstructor
public class books {
    private int bookid;
    private string bookname;
    private int bookcounts;
    private string detail;
}

导入相关的pom依赖

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<dependencies>
        <!--junit-->
        <dependency>
            <groupid>junit</groupid>
            <artifactid>junit</artifactid>
            <version>4.12</version>
        </dependency>
        <!--数据库驱动-->
        <dependency>
            <groupid>mysql</groupid>
            <artifactid>mysql-connector-java</artifactid>
            <version>5.1.47</version>
        </dependency>
        <!-- 数据库连接池 -->
        <dependency>
            <groupid>com.mchange</groupid>
            <artifactid>c3p0</artifactid>
            <version>0.9.5.2</version>
        </dependency>
 
        <!--servlet - jsp -->
        <dependency>
            <groupid>javax.servlet</groupid>
            <artifactid>servlet-api</artifactid>
            <version>2.5</version>
        </dependency>
        <dependency>
            <groupid>javax.servlet.jsp</groupid>
            <artifactid>jsp-api</artifactid>
            <version>2.2</version>
        </dependency>
        <dependency>
            <groupid>javax.servlet</groupid>
            <artifactid>jstl</artifactid>
            <version>1.2</version>
        </dependency>
 
        <!--mybatis-->
        <dependency>
            <groupid>org.mybatis</groupid>
            <artifactid>mybatis</artifactid>
            <version>3.5.2</version>
        </dependency>
        <dependency>
            <groupid>org.mybatis</groupid>
            <artifactid>mybatis-spring</artifactid>
            <version>2.0.2</version>
        </dependency>
        <dependency>
            <groupid>org.aspectj</groupid>
            <artifactid>aspectjweaver</artifactid>
            <version>1.8.4</version>
        </dependency>
        <!--spring-->
        <dependency>
            <groupid>org.springframework</groupid>
            <artifactid>spring-webmvc</artifactid>
            <version>5.1.9.release</version>
        </dependency>
        <dependency>
            <groupid>org.springframework</groupid>
            <artifactid>spring-jdbc</artifactid>
            <version>5.1.9.release</version>
        </dependency>
        <dependency>
            <groupid>org.projectlombok</groupid>
            <artifactid>lombok</artifactid>
            <version>1.18.16</version>
            <scope>compile</scope>
        </dependency>
    </dependencies>

资源过滤设置

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<build>
   <resources>
       <resource>
           <directory>src/main/java</directory>
           <includes>
               <include>**/*.properties</include>
               <include>**/*.xml</include>
           </includes>
           <filtering>false</filtering>
       </resource>
       <resource>
           <directory>src/main/resources</directory>
           <includes>
               <include>**/*.properties</include>
               <include>**/*.xml</include>
           </includes>
           <filtering>false</filtering>
       </resource>
   </resources>
</build>

mybatis层编写
创建mybatis-config.xml

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<?xml version="1.0" encoding="utf-8" ?>
<!doctype configuration
        public "-//mybatis.org//dtd config 3.0//en"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
 
    <settings>
        <setting name="logimpl" value="stdout_logging"/>
    </settings>
 
    <typealiases>
        <package name="com.longdi.pojo"/>
    </typealiases>
    <mappers>
        <mapper class="com.longdi.dao.bookmapper"/>
    </mappers>
</configuration>
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jdbc.driver=com.mysql.jdbc.driver
jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?usessl=true&useunicode=true&characterencoding=utf8
jdbc.username=root
jdbc.password=123456

编写dao层的mapper接口

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package com.longdi.dao;
 
import com.longdi.pojo.books;
import org.apache.ibatis.annotations.param;
 
import java.util.list;
 
/**
 * @author: 龍弟
 * @description
 * @date: 2021/9/27 20:32
 */
public interface bookmapper {
    //增加一本书
    int addbook(books books);
 
    //删除一本书
    int deletebookbyid(@param("bookid") int id);
 
    //更新一本书
    int updatebook(books books);
 
    //查询一本书
    books querybookbyid(@param("bookid")int id);
 
    //查询全部的书
    list<books> queryallbook();
 
    books querybookbyname(@param("bookname")string bookname);
 
}

编写接口对应的 mapper.xml 文件。需要导入mybatis的包；

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<?xml version="1.0" encoding="utf-8" ?>
<!doctype mapper
        public "-//mybatis.org//dtd config 3.0//en"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.longdi.dao.bookmapper">
    <insert id="addbook" parametertype="books">
       insert into ssmbuild.books(bookname,bookcounts,detail)
       values(#{bookname},#{bookcounts},#{detail});
    </insert>
 
    <delete id="deletebookbyid" parametertype="int">
        delete from ssmbuild.books where bookid=#{bookid}
    </delete>
    
    <update id="updatebook" parametertype="books">
        update ssmbuild.books
        set bookname=#{bookname},bookcounts=#{bookcounts},detail=#{detail}
        where bookid=#{bookid};
 
    </update>
 
    <select id="querybookbyid" resulttype="books">
        select * from ssmbuild.books
        where bookid=#{bookid}
    </select>
 
    <select id="queryallbook" resulttype="books">
        select * from ssmbuild.books
    </select>
    
    <select id="querybookbyname" resulttype="books">
        select * from ssmbuild.books where bookname=#{bookname}
    </select>
    
</mapper>

编写service层的接口

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package com.longdi.service;
 
import com.longdi.pojo.books;
 
 
import java.util.list;
 
/**
 * @author: 龍弟
 * @description
 * @date: 2021/9/27 21:03
 */
public interface bookservice {
    //增加一本书
    int addbook(books books);
 
    //删除一本书
    int deletebookbyid( int id);
 
    //更新一本书
    int updatebook(books books);
 
    //查询一本书
    books querybookbyid(int id);
 
    //查询全部的书
    list<books> queryallbook();
 
    books querybookbyname(string bookname);
}

service层的实现类

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package com.longdi.service;
 
import com.longdi.dao.bookmapper;
import com.longdi.pojo.books;
import org.springframework.stereotype.service;
 
import java.util.list;
 
/**
 * @author: 龍弟
 * @description
 * @date: 2021/9/27 21:05
 */
 
public class bookserviceimpl implements bookservice{
 
    private bookmapper bookmapper;
    public void setbookmapper(bookmapper bookmapper) {
        this.bookmapper = bookmapper;
    }
 
    public int addbook(books books) {
        return bookmapper.addbook(books);
    }
 
    public int deletebookbyid(int id) {
        return bookmapper.deletebookbyid(id);
    }
 
    public int updatebook(books books) {
        system.out.println("bookserviceimpl:updatebook=>"+books);
        return bookmapper.updatebook(books);
    }
 
    public books querybookbyid(int id) {
        return bookmapper.querybookbyid(id);
    }
 
    public list<books> queryallbook() {
        return bookmapper.queryallbook();
    }
 
    public books querybookbyname(string bookname) {
        return bookmapper.querybookbyname(bookname);
    }
}

spring整合mybatis spring-dao.xml
以下为spring层

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<?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:context="http://www.springframework.org/schema/context"
       xsi:schemalocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context
       https://www.springframework.org/schema/context/spring-context.xsd">
 
    <!-- 配置整合mybatis -->
    <!-- 1.关联数据库文件 -->
    <context:property-placeholder location="classpath:database.properties"/>
 
    <!-- 2.数据库连接池 -->
    <!--数据库连接池
        dbcp 半自动化操作 不能自动连接
        c3p0 自动化操作（自动的加载配置文件 并且设置到对象里面）
    -->
    <bean id="datasource" class="com.mchange.v2.c3p0.combopooleddatasource">
        <!-- 配置连接池属性 -->
        <property name="driverclass" value="${jdbc.driver}"/>
        <property name="jdbcurl" value="${jdbc.url}"/>
        <property name="user" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
 
        <!-- c3p0连接池的私有属性 -->
        <property name="maxpoolsize" value="30"/>
        <property name="minpoolsize" value="10"/>
        <!-- 关闭连接后不自动commit -->
        <property name="autocommitonclose" value="false"/>
        <!-- 获取连接超时时间 -->
        <property name="checkouttimeout" value="10000"/>
        <!-- 当获取连接失败重试次数 -->
        <property name="acquireretryattempts" value="2"/>
    </bean>
 
    <!-- 3.配置sqlsessionfactory对象 -->
    <bean id="sqlsessionfactory" class="org.mybatis.spring.sqlsessionfactorybean">
        <!-- 注入数据库连接池 -->
        <property name="datasource" ref="datasource"/>
        <!-- 配置mybaties全局配置文件:mybatis-config.xml -->
        <property name="configlocation" value="classpath:mybatis-config.xml"/>
    </bean>
 
    <!-- 4.配置扫描dao接口包，动态实现dao接口注入到spring容器中 -->
    <bean class="org.mybatis.spring.mapper.mapperscannerconfigurer">
        <!-- 注入sqlsessionfactory -->
        <property name="sqlsessionfactorybeanname" value="sqlsessionfactory"/>
        <!-- 给出需要扫描dao接口包 -->
        <property name="basepackage" value="com.longdi.dao"/>
    </bean>
 
</beans>

spring-service.xml文件

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<?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:context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemalocation="http://www.springframework.org/schema/beans
   http://www.springframework.org/schema/beans/spring-beans.xsd
   http://www.springframework.org/schema/context
   http://www.springframework.org/schema/context/spring-context.xsd
    http://www.springframework.org/schema/aop
   http://www.springframework.org/schema/aop/spring-aop.xsd
   http://www.springframework.org/schema/tx
   http://www.springframework.org/schema/tx/spring-tx.xsd">
 
    <!-- 扫描service相关的bean -->
    <context:component-scan base-package="com.longdi.service" />
 
    <!--bookserviceimpl注入到ioc容器中-->
    <bean id="bookserviceimpl" class="com.longdi.service.bookserviceimpl">
        <property name="bookmapper" ref="bookmapper"/>
    </bean>
 
    <!-- 配置事务管理器 -->
    <bean id="transactionmanager" class="org.springframework.jdbc.datasource.datasourcetransactionmanager">
        <!-- 注入数据库连接池 -->
        <property name="datasource" ref="datasource" />
    </bean>
    <!--aop事物支持-->
 
    <!--结合aop实现事物的织入-->
    <!--配置事物的通知-->
 
    <tx:advice id="txadvice" transaction-manager="transactionmanager">
        <tx:attributes>
            <tx:method name="*" propagation="required"/>
        </tx:attributes>
    </tx:advice>
 
    <!--配置事物切入-->
    <aop:config>
        <aop:pointcut id="txpointcut" expression="execution(* com.longdi.dao.*.*(..))"/>
        <aop:advisor advice-ref="txadvice" pointcut-ref="txpointcut"/>
    </aop:config>
 
</beans>

以下为springmvc层
配置web.xml

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<?xml version="1.0" encoding="utf-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/xmlschema-instance"
         xsi:schemalocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">
 
    <!--dispatcherservlet-->
    <servlet>
        <servlet-name>dispatcherservlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.dispatcherservlet</servlet-class>
        <init-param>
            <param-name>contextconfiglocation</param-name>
            <!--一定要注意:我们这里加载的是总的配置文件，之前被这里坑了！-->
            <param-value>classpath:applicationcontext.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>dispatcherservlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
 
    <!--encodingfilter-->
    <filter>
        <filter-name>encodingfilter</filter-name>
        <filter-class>
            org.springframework.web.filter.characterencodingfilter
        </filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>utf-8</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>encodingfilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
 
    <!--session过期时间-->
    <session-config>
        <session-timeout>15</session-timeout>
    </session-config>
 
</web-app>

spring-mvc.xml

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<?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:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemalocation="http://www.springframework.org/schema/beans
   http://www.springframework.org/schema/beans/spring-beans.xsd
   http://www.springframework.org/schema/context
   http://www.springframework.org/schema/context/spring-context.xsd
   http://www.springframework.org/schema/mvc
   https://www.springframework.org/schema/mvc/spring-mvc.xsd">
 
    <!-- 配置springmvc -->
    <!-- 1.开启springmvc注解驱动 -->
    <mvc:annotation-driven />
    <!-- 2.静态资源默认servlet配置-->
    <mvc:default-servlet-handler/>
 
    <!-- 3.配置jsp 显示viewresolver视图解析器 -->
    <bean class="org.springframework.web.servlet.view.internalresourceviewresolver">
        <property name="viewclass" value="org.springframework.web.servlet.view.jstlview" />
        <property name="prefix" value="/web-inf/jsp/" />
        <property name="suffix" value=".jsp" />
    </bean>
 
    <!-- 4.扫描web相关的bean -->
    <context:component-scan base-package="com.longdi.controller" />
 
</beans>

spring配置整合文件，创建applicationcontext.xml

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<?xml version="1.0" encoding="utf-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/xmlschema-instance"
       xsi:schemalocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd">
 
    <import resource="spring-dao.xml"/>
    <import resource="spring-service.xml"/>
    <import resource="spring-mvc.xml"/>
 
</beans>

以上为ssm的环境配置，下面编写controller层和视图层，实现书籍的crud功能

controller层 书籍的增删改查功能

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import java.util.arraylist;
import java.util.list;
 
/**
 * @author: 龍弟
 * @description
 * @date: 2021/9/27 22:47
 */
@controller
@requestmapping("/book")
public class bookcontroller {
 
    @autowired
    @qualifier("bookserviceimpl")
    private bookservice bookservice;
 
    @requestmapping("/allbook")
    public string list(model model) {
        list<books> list = bookservice.queryallbook();
        model.addattribute("list", list);
        return "allbook";
    }
    //跳转到增加书籍页面
    @requestmapping("/toaddbook")
    public string toaddpaper(){
        return "addbook";
    }
    //添加书籍的请求
    @requestmapping("/addbook")
    public string addbook(books books){
        system.out.println("addbook=>"+books);
        bookservice.addbook(books);
        return "redirect:/book/allbook";
    }
    //跳转到修改页面
    @requestmapping("toupdatebook")
    public string toupdatepaper(int id,model model){
        books books = bookservice.querybookbyid(id);
        model.addattribute("book",books);
        return "updatebook";
    }
    //修改书籍
    @requestmapping("updatebook")
    public string updatebook(books books){
        system.out.println("updatebook=>"+books);
        int i=bookservice.updatebook(books);
        if(i>0){
            system.out.println("添加books成功"+books);
        }
 
        return "redirect:/book/allbook";
    }
 
    //删除书籍
    @requestmapping("/deletebook/{bookid}")
    public string delebook(@pathvariable("bookid") int id){
        bookservice.deletebookbyid(id);
        return "redirect:/book/allbook";
    }
    //查询书籍
    @requestmapping("/querybook")
    public string querybook(string querybookname,model model){
         books books=bookservice.querybookbyname(querybookname);
        system.err.println("querybook=>"+books);
         list<books> list=new arraylist<books>();
         list.add(books);
 
         if(books==null){
             list=bookservice.queryallbook();
             model.addattribute("error","未查到");
         }
 
         model.addattribute("list",list);
         return "allbook";
    }
 
}

编写首页index.jsp

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<%@ page language="java" contenttype="text/html; charset=utf-8" pageencoding="utf-8" %>
<!doctype html>
<html>
<head>
  <title>首页</title>
  <style>
    a{
      text-decoration: none;
      color:black;
      font-size:18px;
    }
    h3{
      width:180px;
      height:38px;
      margin: 100px auto;
      text-align: center;
      line-height: 38px;
      background: deepskyblue;
      border-radius: 4px;
    }
  </style>
</head>
 
<h3>
  <a href="${pagecontext.request.contextpath}/book/allbook" rel="external nofollow"  rel="external nofollow" >进入到书籍页面</a>
</h3>
</body>
</html>

编写书籍列表页面allbook.jsp

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<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contenttype="text/html;charset=utf-8" language="java" %>
<html>
<head>
  <title>书籍列表</title>
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <!-- 引入 bootstrap -->
  <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="stylesheet">
</head>
<body>
 
<div class="container">
 
  <div class="row clearfix">
    <div class="col-md-12 column">
      <div class="page-header">
        <h1>
          <small>书籍列表 —— 显示所有书籍</small>
        </h1>
      </div>
    </div>
  </div>
 
  <div class="row">
    <div class="col-md-4 column">
      <a class="btn btn-primary" href="${pagecontext.request.contextpath}/book/toaddbook" rel="external nofollow" >新增书籍</a>
      <a class="btn btn-primary" href="${pagecontext.request.contextpath}/book/allbook" rel="external nofollow"  rel="external nofollow" >显示全部书籍</a>
    </div>
    <div class="col-md-4 column">
      <div class="col-md-8 column"></div>
      <%--查询书籍--%>
 
      <form  class="form-inline" action="${pagecontext.request.contextpath}/book/querybook" method="post" style="float: right">
        <span style="color:red;font-weight: bold">${error}</span>
          <input type="text" name="querybookname" class="form-control" placeholder="请输入要查询的书籍名称">
          <input type="submit" value="查询" class="btn btn-primary"/>
      </form>
    </div>
  </div>
 
  <div class="row clearfix">
    <div class="col-md-12 column">
      <table class="table table-hover table-striped">
        <thead>
        <tr>
          <th>书籍编号</th>
          <th>书籍名字</th>
          <th>书籍数量</th>
          <th>书籍详情</th>
          <th>操作</th>
        </tr>
        </thead>
 
        <tbody>
        <c:foreach var="book" items="${requestscope.get('list')}">
          <tr>
            <td>${book.getbookid()}</td>
            <td>${book.getbookname()}</td>
            <td>${book.getbookcounts()}</td>
            <td>${book.getdetail()}</td>
            <td>
 
              <a href="${pagecontext.request.contextpath}/book/toupdatebook?id=${book.getbookid()}" rel="external nofollow" >更改</a> |
              <a href="${pagecontext.request.contextpath}/book/deletebook/${book.getbookid()}" rel="external nofollow" >删除</a>
            </td>
          </tr>
        </c:foreach>
        </tbody>
      </table>
    </div>
  </div>
</div>

添加书籍页面 addbook.jsp

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<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contenttype="text/html;charset=utf-8" language="java" %>
 
<html>
<head>
    <title>新增书籍</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <!-- 引入 bootstrap -->
    <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="stylesheet">
</head>
<body>
<div class="container">
 
    <div class="row clearfix">
        <div class="col-md-12 column">
            <div class="page-header">
                <h1>
                    <small>新增书籍</small>
                </h1>
            </div>
        </div>
    </div>
    <form action="${pagecontext.request.contextpath}/book/addbook" method="post">
        书籍名称：<input type="text" name="bookname"><br><br><br>
        书籍数量：<input type="text" name="bookcounts"><br><br><br>
        书籍详情：<input type="text" name="detail"><br><br><br>
        <input type="submit" value="添加">
    </form>
 
</div>

修改书籍页面 updatebook.jsp

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<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contenttype="text/html;charset=utf-8" language="java" %>
<html>
<head>
    <title>修改信息</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <!-- 引入 bootstrap -->
    <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="stylesheet">
</head>
<body>
<div class="container">
 
    <div class="row clearfix">
        <div class="col-md-12 column">
            <div class="page-header">
                <h1>
                    <small>修改信息</small>
                </h1>
            </div>
        </div>
    </div>
 
    <form action="${pagecontext.request.contextpath}/book/updatebook" method="post">
        <input type="hidden" name="bookid" value="${book.getbookid()}"/>
        书籍名称：<input type="text" name="bookname" value="${book.getbookname()}"/>
        书籍数量：<input type="text" name="bookcounts" value="${book.getbookcounts()}"/>
        书籍详情：<input type="text" name="detail" value="${book.getdetail() }"/>
        <input type="submit" value="提交"/>
    </form>
 
</div>

Java 整合模板彻底解决ssm配置难题

Java 整合模板彻底解决ssm配置难题

Java 整合模板彻底解决ssm配置难题

项目部署到tomcat中

Java 整合模板彻底解决ssm配置难题

项目结构图

Java 整合模板彻底解决ssm配置难题

Java 整合模板彻底解决ssm配置难题

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原文链接：https://blog.csdn.net/weixin_48838340/article/details/120537708