SSM项目整合包含源码过程详细
SSM框架整合回顾了下Spring,SpringMVC,MyBatis框架整合,完善了一个小案例,包括基本的增删改查功能。1. 一般项目步骤编写顺序:2. 环境要求IDEAMySQLTomcatMaven需要熟练掌握MySQL数据库,Spring,JavaWeb及MyBatis知识,简单的前端知识;3. 数据库环境创建一个存放书籍书籍的数据库表CREATE DATA...
SSM框架整合
回顾了下Spring,SpringMVC,MyBatis框架整合,完善了一个小案例,包括基本的增删改查功能。
1. 一般项目步骤
编写顺序:
2. 环境要求
- IDEA
- MySQL
- Tomcat
- Maven
- 需要熟练掌握MySQL数据库,Spring,JavaWeb及MyBatis知识,简单的前端知识;
3. 数据库环境
创建一个存放书籍书籍的数据库表
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');
4. 基本环境搭建
- 新建一Maven项目! ssmbuild , 添加web的支持
- 导入相关的pom依赖!
<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>8.0.19</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>
<!--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>
<!-- lombok-->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.8</version>
<scope>provided</scope>
</dependency>
</dependencies>
- Maven资源过滤设置
<build>
<resources>
<resource>
<directory>src/main/java</directory>
<includes>1
<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>
<!--中文注释问题-->
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
- 建立基本结构和配置框架
-
com.wangqiang.pojo
-
com.wangqiang.dao
-
com.wangqiang.service
-
Mybatis-config.xml
<?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> </configuration>
-
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" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"> </beans>
5. Mybatis层编写
-
数据库配置文件 database.properties
jdbc.driver=com.mysql.jdbc.Driver # 如果是mysql 8.0+的要设置时区 jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=true&useUnicode=true&characterEncoding=utf8 jdbc.username=root jdbc.password=root
-
IDEA 关联数据库
-
编写MyBatist的核心配置文件
<?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> <!--配置数据源 ,交给spring了--> <!-- 使用标准的默认的日志工厂--> <settings> <setting name="logImpl" value="STDOUT_LOGGING"/> </settings> <typeAliases> <package name="edu.xalead.pojo"/> </typeAliases> <mappers> <mapper class="edu.xalead.dao.BookMapper"/> </mappers> </configuration>
-
编写数据库对应的实体类edu.xalead.pojo.Books(使用lombok插件)
package edu.xalead.pojo; import lombok.AllArgsConstructor; import lombok.Data; import lombok.NoArgsConstructor; @Data @AllArgsConstructor @NoArgsConstructor public class Books { private int bookID; private String bookName; private int bookCounts; private String detail; }
-
编写Dao层的Mapper接口:BookMapper
package edu.xalead.dao; import com.wangqiang.pojo.Books; import org.apache.ibatis.annotations.Param; import java.util.List; public interface BookMapper { int addBook(Books book);//增加一个Book int deleteBookById(@Param(value = "bookId") int id);//根据id删除一个Book int updateBook(Books book);//修改一个Book Books queryBookById(@Param(value = "bookId")int id);//根据id查询,返回一个Book List<Books> queryAllBook();//查询全部Book,返回list集合 }
-
编写接口对应的Mapper.xml文件:BookMapper.xml。需要导入MyBatis的包
<?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="edu.xalead.dao.BookMapper"> <insert id="addBook" parameterType="books"> insert into ssmbuild.books (bookName, bookCounts, detail) values (#{bookName}, #{bookCounts}, #{detail}); </insert> <delete id="deleteBookById"> 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层的接口和实现类:
BookService接口:
package edu.xalead.service; import edu.xalead.pojo.Books; import org.apache.ibatis.annotations.Param; import java.util.List; public interface BookService { //增删改查,查全部的书 int addBook(Books books); int deleteBookById( int id); int updateBook(Books books); Books queryBookById( int id); List<Books> queryAllBook(); Books queryBookByName(@Param("bookName")String bookName); }
BookServiceImpl实现类:
package edu.xalead.service; import edu.xalead.dao.BookMapper; import edu.xalead.pojo.Books; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Qualifier; import org.springframework.stereotype.Service; import java.util.List; @Service public class BookServiceImpl implements BookService { @Autowired 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) { 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); } }
6. Spring层
-
配置Spring整合MyBatis,我们这里数据源使用c3p0连接池;
-
编写Spring整合Mybatis的相关的配置文件:spring-dao.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: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 http://www.springframework.org/schema/context/spring-context.xsd"> <!--1.关联数据库配置文件--> <context:property-placeholder location="classpath:db.properties"/> <!--2.连接池 dbcp:半自动,不能自动连接 c3p0 : 自动化操作 druid : hikari--> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <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.sqlSessionFactory--> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource"/> <!--绑定Mybatis配置文件--> <property name="configLocation" value="classpath:mybatis-config.xml"/> <!--<property name="mapperLocations" value="classpath:edu/xalead/dao/BookMapper.xml"/>--> </bean> <!--4.配置dao接口扫描包,动态实现到接口注入到spring容器--> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <!--注入sqlSessionFactory--> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" /> <property name="basePackage" value="edu.xalead.dao"/> </bean> <!--5.sqlSessionTemplate 可没有--> <!--<bean id="SqlSession" class="org.mybatis.spring.SqlSessionTemplate">--> <!--<!–只能用构造器注入SqlSessionFactory ,他没有set方法–>--> <!--<constructor-arg index="0" ref="SqlSessionFactory"/>--> <!--</bean>--> </beans>
-
Spring整合service层
<?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 https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd"> <!--1. 扫描service下的包--> <context:component-scan base-package="edu.xalead.service"/> <!--2. 将我们所有业务注入到spring中,可用注解或配置--> <!--<bean id="bookServiceImpl" class="edu.xalead.service.BookServiceImpl">--> <!--<property name="bookMapper" ref="bookMapper"/>--> <!--</bean>--> <!--3. 声明式事务配置--> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <!--注入数据源--> <property name="dataSource" ref="dataSource"/> </bean> <!--4. aop事务支持--> <!--配置事务通知--> <tx:advice id="txAdvice" transaction-manager="transactionManager"> <!--给哪些方法配置事务--> <!--配置传播 propagation--> <tx:attributes> <tx:method name="*" propagation="REQUIRED"/> </tx:attributes> </tx:advice> <!--配置事务切入--> <aop:config> <!--配置切入点--> <aop:pointcut id="txPointCut" expression="execution(* edu.xalead.dao.*.*(..))"/> <!--通知--> <aop:advisor advice-ref="txAdvice" pointcut-ref="txPointCut"/> </aop:config> </beans>
7. SpringMVC层
-
项目添加框架支持Web,修改WEB-INF文件下web.xml文件
<?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"> <!--DispatchServlet--> <servlet> <servlet-name>springmvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springmvc</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <!--乱码过滤--> <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--> <session-config> <session-timeout>15</session-timeout> </session-config> </web-app>
-
spring-mvc.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:mvc="http://www.springframework.org/schema/mvc" 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/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd"> <!--1.注解驱动--> <mvc:annotation-driven/> <!--2.静态资源过滤--> <mvc:default-servlet-handler/> <!--3.扫描包:controller--> <context:component-scan base-package="edu.xalead.controller"/> <!--4.视图解析器--> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/jsp/"/> <property name="suffix" value=".jsp"/> </bean> <mvc:interceptors> <mvc:interceptor> <mvc:mapping path="/**"/> <bean class="edu.xalead.Interceptor.LoginInterceptor"/> </mvc:interceptor> </mvc:interceptors> </beans>
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Spring配置整合文件: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" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"> <import resource="classpath:spring-dao.xml"/> <import resource="classpath:spring-service.xml"/> <import resource="classpath:spring-mvc.xml"/> </beans>
8. Conntroller 和 视图
-
BookController 类编写 。
package edu.xalead.controller; import edu.xalead.pojo.Books; import edu.xalead.service.BookService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Qualifier; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RequestMapping; import javax.servlet.http.HttpSession; import java.util.ArrayList; import java.util.List; @Controller @RequestMapping("/book") public class BookController { //controller 调 service 层 @Autowired @Qualifier("bookServiceImpl") public BookService bookService; //查询全部书籍,并展示到一个展示页面 @RequestMapping("/allBook") public String list(Model model){ List<Books> booksList= bookService.queryAllBook(); model.addAttribute("booksList",booksList); return "allBook"; } @RequestMapping("/addBook") public String addToBook(){ return "addBook"; } @RequestMapping("/insertBook") public String addBook(Books books){ System.out.println("books==>"+ books); bookService.addBook(books); return "redirect: /book/allBook";//重定向,请求复用 } @RequestMapping("/toUpdate/{id}") public String toUpdateBook(@PathVariable("id") int id, Model model){ Books books = bookService.queryBookById(id); model.addAttribute("book",books); return "updateBook"; } @RequestMapping("/updateBookById") public String updateBook(Books books){ bookService.updateBook(books); return "redirect: /book/allBook"; } @RequestMapping("/deleteBookById/{id}") public String updateBook(@PathVariable("id") int id){ bookService.deleteBookById(id); return "redirect: /book/allBook"; } @RequestMapping("/queryBook") public String queryBook(String queryBookName,Model model){ Books books = bookService.queryBookByName(queryBookName); System.out.println(books); List<Books> booksList=new ArrayList<Books>(); if(books==null){ booksList= bookService.queryAllBook(); model.addAttribute("err","未找到对应书籍"); }else{ booksList.add(books); } model.addAttribute("booksList",booksList); return "allBook"; } @RequestMapping("/login") public String login(String username, String password, HttpSession session){ System.out.println(username); session.setAttribute("username",username); return "redirect: /book/allBook"; } }
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编写首页:index.jsp
<%-- Created by IntelliJ IDEA. User: aijian Date: 2020/3/16 Time: 10:18 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <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: 5px; } </style> </head> <body> <h3> <a href="${pageContext.request.contextPath}/book/allBook">进入书籍页面</a> </h3> </body> </html>
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编写书籍列表页:allBook.jsp
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <%-- Created by IntelliJ IDEA. User: aijian Date: 2020/3/16 Time: 10:53 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>书籍展示</title> <%--BootStrap 美化页面--%> <link href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"> </head> <body> <div class="container"> <div class="row clearfix"> <div class="col-md-12 column"> <div class="page-header"> <h1> <small> 书籍列表------显示所有书籍</small> </h1> </div> </div> <div class="row"> <div class="col-md-4 column"> <a class="btn btn-primary text-right" href="${pageContext.request.contextPath}/book/addBook">新增书籍</a> <a class="btn btn-primary text-right" href="${pageContext.request.contextPath}/book/allBook">全部书籍</a> </div> <div class="col-md-4 column"></div> <div class="col-md-4 column"> <%--查询书籍--%> <form class="form-inline" action="${pageContext.request.contextPath}/book/queryBook" method="post"> <div> <span style="color: red">${err}</span> <input type="text" name="queryBookName" class="form-control" placeholder="请输入书名查询书籍"> <input id="right" type="submit" value="查询" class="btn btn-primary"/> </div> </form> </div> </div> </div> <div class="row clearfix"> <div class="col-md-12 column"> <table class="table table-hover table-striped"> <thead> <tr> <th>书籍编号</th> <th>书籍名称</th> <th>书籍数量</th> <th>书籍详情</th> <th>操作</th> </tr> </thead> <%--书籍从数据库中查出来,然后遍历--%> <tbody> <c:forEach var="book" items="${booksList}"> <tr> <td>${book.bookID}</td> <td>${book.bookName}</td> <td>${book.bookCounts}</td> <td>${book.detail}</td> <td> <a href="/book/toUpdate/${book.bookID}">修改</a> | <a href="/book/deleteBookById/${book.bookID}">删除</a> </td> </tr> </c:forEach> </tbody> </table> </div> </div> </div> </body> </html>
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编写添加书籍页面:addBook.jsp
<%-- Created by IntelliJ IDEA. User: aijian Date: 2020/3/16 Time: 12:23 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>新增书籍页</title> <%--BootStrap 美化页面--%> <link href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css" 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="/book/insertBook" method="post"> <div class="form-group"> <label for="bkname">书籍名称:</label> <input type="text" name="bookName" class="form-control" id="bkname" required> </div> <div class="form-group"> <label for="bkcounts">书籍数量:</label> <input type="text" name="bookCounts" class="form-control" id="bkcounts" required> </div> <div class="form-group"> <label for="bkd">书籍描述:</label> <input type="text" name="detail" class="form-control" id="bkd" required> </div> <button type="submit" class="btn btn-default">新增</button> </form> </div> </body> </html>
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编写修改书籍页面:updateBook.jsp
<%-- Created by IntelliJ IDEA. User: aijian Date: 2020/3/16 Time: 14:03 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>修改书籍</title> <link href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"> </head> <body> <div class="container"> <div class="row clearfix"> <div class="col-md-12 column"> <div class="page-header"> <h1> <small>修改书籍</small> </h1> </div> </div> </div> <form action="/book/updateBookById" method="post"> <input type="hidden" name="bookID" value="${book.bookID}"/> <div class="form-group"> <label for="bkname">书籍名称:</label> <input type="text" name="bookName" class="form-control" value="${book.bookName}" id="bkname" required> </div> <div class="form-group"> <label for="bkcounts">书籍数量:</label> <input type="text" name="bookCounts" class="form-control" value="${book.bookCounts}" id="bkcounts" required> </div> <div class="form-group"> <label for="bkd">书籍描述:</label> <input type="text" name="detail" class="form-control" value="${book.detail}" id="bkd" required> </div> <button type="submit" class="btn btn-default">修改</button> </form> </div> </body> </html>
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编写登陆页:login.jsp
<%-- Created by IntelliJ IDEA. User: aijian Date: 2020/3/17 Time: 9:23 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>Title</title> </head> <body> <h1>登陆页</h1> <form action="${pageContext.request.contextPath}/book/login" method="post"> 用户名:<input type="text" name="username"><br/> 密 码:<input type="password" name="password"><br/> <input type="submit" value="登陆"><span style="color: red">${error}</span> </form> </body> </html>
9. 参考资料
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