【SSM】(一)SSM整合-增删改查书籍

一、Mybatis层

• 数据库

  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');
  

• pom.xml

  <dependencies>
          <dependency>
              <groupId>junit</groupId>
              <artifactId>junit</artifactId>
              <version>4.11</version>
          </dependency>
          <dependency>
              <groupId>mysql</groupId>
              <artifactId>mysql-connector-java</artifactId>
              <version>5.1.47</version>
          </dependency>
          <!-- 数据库连接池：c3p0 -->
          <dependency>
              <groupId>com.mchange</groupId>
              <artifactId>c3p0</artifactId>
              <version>0.9.5.2</version>
          </dependency>
          <!-- Servlet Jsp Jstl-->
          <dependency>
              <groupId>javax.servlet</groupId>
              <artifactId>javax.servlet-api</artifactId>
              <version>3.1.0</version>
              <scope>provided</scope>
          </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>2.0.6</version>
          </dependency>
  
          <!-- spring -->
          <dependency>
              <groupId>org.springframework</groupId>
              <artifactId>spring-webmvc</artifactId>
              <version>5.2.12.RELEASE</version>
          </dependency>
          <!-- Spring操作数据库，需要spring-jdbc -->
          <dependency>
              <groupId>org.springframework</groupId>
              <artifactId>spring-jdbc</artifactId>
              <version>5.2.12.RELEASE</version>
          </dependency>
          <!-- AspectJ Weaver -->
          <dependency>
              <groupId>org.aspectj</groupId>
              <artifactId>aspectjweaver</artifactId>
              <version>1.9.6</version>
          </dependency>
  
          <!--lombok -->
          <dependency>
              <groupId>org.projectlombok</groupId>
              <artifactId>lombok</artifactId>
              <version>1.18.12</version>
              <scope>provided</scope>
          </dependency>
      </dependencies>
  
  
      <!--在build中配置resources，防止资源导出失败的问题-->
      <build>
          <resources>
              <resource>
                  <directory>src/main/resources</directory>
                  <includes>
                      <include>**/*.properties</include>
                      <include>**/*.xml</include>
                  </includes>
                  <filtering>false</filtering>
              </resource>
              <resource>
                  <directory>src/main/java</directory>
                  <includes>
                      <include>**/*.properties</include>
                      <include>**/*.xml</include>
                  </includes>
                  <filtering>false</filtering>
              </resource>
          </resources>
      </build>
  

• database.properties

  jdbc.driver=com.mysql.jdbc.Driver
  # 如果使用的是MySQL 8.0+，需要增加时区的配置；&serverTimezone=Asia/Shanghai
  jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=true&useUnicode=true&characterEncoding=utf8
  jdbc.username=root
  jdbc.password=root
  

• mybatis-config.xml：别名、日志、配置xxxMapper（数据源在spring-dao.xml中配置）

  <?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.musecho.pojo"/>
      </typeAliases>
  
      <mappers>
          <mapper class="com.musecho.dao.BookMapper"/>
      </mappers>
  </configuration>
  

• Books

  @Data
  @AllArgsConstructor
  @NoArgsConstructor
  public class Books {
  
      private int bookID;
      private String bookName;
      private int bookCounts;
      private String detail;
  }
  

• BookMapper

  public interface BookMapper {
  
      int addBook(Books books);
  
      int deleteBookById(@Param("bookId") int id);
  
      int updateBook(Books books);
  
      Books queryBookById(@Param("bookId")int id);
  
      List<Books> queryAllBooks();
  
  }
  

• BookMapper.xml

  <?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>
  
      <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" parameterType="int" resultType="books">
          select * from ssmbuild.books
          where bookID=#{bookId};
      </select>
  
      <select id="queryAllBooks" resultType="books">
          select * from ssmbuild.books;
      </select>
  
  </mapper>
  

• BookService

  public interface BookService {
  
      int addBook(Books books);
  
      int deleteBookById(int id);
  
      int updateBook(Books books);
  
      Books queryBookById(int id);
  
      List<Books> queryAllBooks();
  
  }
  

• BookServiceImpl

  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) {
          return bookMapper.updateBook(books);
      }
  
      public Books queryBookById(int id) {
          return bookMapper.queryBookById(id);
      }
  
      public List<Books> queryAllBooks() {
          return bookMapper.queryAllBooks();
      }
  
  }
  

二、Spring层

• spring-dao.xml

  配置dao接口动态扫描包：将所有dao类注入到Spring容器，并注入sqlSessionFactory。

  就不用写xxxMapper接口的实现类(通过sqlSession获取mapper，返回操作结果)了。

  <?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
          https://www.springframework.org/schema/beans/spring-beans.xsd
          http://www.springframework.org/schema/context
          https://www.springframework.org/schema/context/spring-context.xsd">
  
      <!--1. 关联数据库配置文件-->
      <context:property-placeholder location="classpath:database.properties"/>
  
      <!--2.连接池
          dbcp：半自动化操作，不能自动连接
          c3p0：自动化操作（自动化加载配置文件，并且可以自动设置到对象中）
          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"/>
          <!-- 获取连接超过时间-->
          <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的配置文件-->
          <property name="configLocation" value="classpath:mybatis-config.xml"/>
      </bean>
  
      <!-- 4.配置dao接口扫描包，动态的实现了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"/>
          <!-- 要扫描的dao包-->
          <property name="basePackage" value="com.musecho.dao"/>
      </bean>
  
  </beans>
  

• spring-service.xml

  需要配置 aop事务支持：由于增删改操作都需要提交事务，所以要开启自动提交事务。并且SSM框架整合后，不需要我们手动调用mybatis代码得到SqlSession从而得到mapper对象了（都在spring配置文件配置了），所以无法执行sqlSessionFactory.openSession(true);。因此我们进行aop织入操作。

  <?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:tx="http://www.springframework.org/schema/tx"
         xmlns:aop="http://www.springframework.org/schema/aop"
         xsi:schemaLocation="http://www.springframework.org/schema/beans
          https://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/tx
          http://www.springframework.org/schema/tx/spring-tx.xsd
          http://www.springframework.org/schema/aop
          https://www.springframework.org/schema/aop/spring-aop.xsd">
  
  
      <!-- 1.扫描service下的包-->
      <context:component-scan base-package="com.musecho.service"/>
  
      <!-- 2.将我们的所有业务类，注入到Spring，可以通过配置或注解实现-->
      <bean id="BookServiceImpl" class="com.musecho.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">
          <!--注入到数据源-->
  <!--        <property name="dataSource" ref="dataSource"/>-->
          <constructor-arg index="0" ref="dataSource" />
      </bean>
  
      <!-- 4.aop事务支持-->
      <!--配置事务通知-->
      <tx:advice id="txAdvice" transaction-manager="transactionManager">
          <!--给所有方法配置事务-->
          <tx:attributes>
              <tx:method name="*" propagation="REQUIRED"/>
          </tx:attributes>
      </tx:advice>
  
      <!--配置事务切入-->
      <aop:config>
          <aop:pointcut id="txPointCut" expression="execution(* com.musecho.dao.*.*(..))"/>
          <aop:advisor advice-ref="txAdvice" pointcut-ref="txPointCut"/>
      </aop:config>
  
  </beans>
  

三、SpringMVC层

• web.xml：DispatcherServlet，乱码过滤

  <?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>springmvc</servlet-name>
          <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
          <init-param>
              <param-name>contextConfigLocation</param-name>
              <param-value>classpath:spring-mvc.xml</param-value>
          </init-param>
      </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
          https://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="com.musecho.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>
  
  </beans>
  

• applicationContext.xml整合

  <?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
          https://www.springframework.org/schema/beans/spring-beans.xsd">
  
     <import resource="spring-dao.xml"/>
     <import resource="spring-service.xml"/>
     <import resource="spring-mvc.xml"/>
  
  </beans>
  

• 报错404：有可能是IDEA的Project Structure里lib没配置

• 报错500：xxxService的bean不存在

  org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'bookController': Unsatisfied dependency expressed through field 'bookService'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.musecho.service.BookService' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true), @org.springframework.beans.factory.annotation.Qualifier(value=BookServiceImpl)}
  

  排错步骤：

  • 1.查看bean注入是否成功【ok】

  • 2.Junit单元测试，查看是否能够查询出结果【ok】

  • 3.上述两步没问题的话，问题就不在底层，在spring

  • 4.SpringMVC，整合时没调用到service层的bean

    • 1.applicationContext.xml没有注入bean【ok】

    • 2.web.xml中，绑定上下文配置的文件写错了。【问题在这】

      应该写applicationContext.xml

  

三、编写功能

1 查询所有书籍列表

• 控制器BookController

  @Controller
  @RequestMapping("/book")
  public class BookController {
  
      @Autowired
      @Qualifier("BookServiceImpl")
      private BookService bookService;
  
      //查询全部的书籍，并且返回一个书籍展示页面
      @RequestMapping("/allBooks2")
      public String queryAllBooks(Model model) {
          List<Books> list = bookService.queryAllBooks();
          model.addAttribute("list", list);
  
          return "allBooks";
      }
      
  }
  

• 首页index.jsp

  <%@ page contentType="text/html;charset=UTF-8" language="java" %>
  <html>
  
  <head>
      <title>首页</title>
      <style type="text/css">
          a {
              text-decoration: none;
              color: black;
              font-size: 30px;
          }
  
          h2 {
              width: 400px;
              height: 55px;
              margin: 250px auto;
              text-align: center;
              line-height: 49px;
              background: deepskyblue;
              border-radius: 10px;
          }
      </style>
  
  </head>
  <body>
  <h2>
      <a href="${pageContext.request.contextPath}/book/allBooks2">点击进入书籍列表页面</a>
  </h2>
  
  </body>
  
  </html>
  

• allBooks.jsp

  <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
  <%@ page contentType="text/html;charset=UTF-8" language="java" %>
  <html>
  
  <head>
      <title>书籍列表展示页面</title>
  
      <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/css/bootstrap.min.css"
            integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
  
  </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">新增书籍</a>
          </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/${book.getBookID()}">修改</a>
                              <a href="${pageContext.request.contextPath}/book/deleteBook/${book.getBookID()}">删除</a>
                          </td>
                      </tr>
                  </c:forEach>
                  </tbody>
              </table>
          </div>
      </div>
  </div>
  </body>
  
  </html>
  

2 新增书籍

• BookController新增方法

  	//跳转到增加书籍的页面
      @RequestMapping("/toAddBook")
      public String toAddBook() {
          return "addBook";
      }
  
      //增加书籍
      @RequestMapping("/addBook2")
      public String addBook(Books book) {
          System.out.println(book);
          bookService.addBook(book);
          return "redirect:/book/allBooks2";
      }
  

• 新增页面addBook.jsp

  <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
  <%@ page contentType="text/html;charset=UTF-8" language="java" %>
  <html>
  
  <head>
      <title>新增书籍页面</title>
  
      <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/css/bootstrap.min.css"
            integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
  
  </head>
  
  <style>
      form-group {
          margin-bottom: 50px;
      }
  </style>
  <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/addBook2" method="post" class="form-horizontal">
          <div class="form-group" style="margin-bottom: 30px;">
              <label for="bookName" class="control-label col-md-1">书籍名字</label>
              <div class="col-md-4">
                  <input name="bookName" class="form-control" id="bookName" required>
              </div>
          </div>
          <div class="form-group" style="margin-bottom: 30px;">
              <label for="bookCount" class="control-label col-md-1">书籍数量</label>
              <div class="col-md-4">
                  <input name="bookCounts" class="form-control" id="bookCount" required>
              </div>
          </div>
          <div class="form-group" style="margin-bottom: 30px;">
              <label for="bookDetail" class="control-label col-md-1">书籍详情</label>
              <div class="col-md-4">
                  <input name="detail" class="form-control" id="bookDetail" required>
              </div>
          </div>
          <div class="form-group" style="margin-bottom: 30px;">
              <div class="col-md-offset-1 col-md-2">
                  <button type="submit" class="btn btn-primary">提交</button>
              </div>
          </div>
      </form>
  
  
  </div>
  </body>
  
  </html>
  

3 修改书籍

• BookController修改方法

  	//跳转到增加书籍的页面
      @RequestMapping("/toAddBook")
      public String toAddBook() {
          return "addBook";
      }
  
      //增加书籍
      @RequestMapping("/addBook2")
      public String addBook(Books book) {
          System.out.println(book);
          bookService.addBook(book);
          return "redirect:/book/allBooks2";
      }
  

• addBook.jsp

  <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
  <%@ page contentType="text/html;charset=UTF-8" language="java" %>
  <html>
  
  <head>
      <title>新增书籍页面</title>
  
      <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/css/bootstrap.min.css"
            integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
  
  </head>
  
  <style>
      form-group {
          margin-bottom: 50px;
      }
  </style>
  <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/addBook2" method="post" class="form-horizontal">
          <div class="form-group" style="margin-bottom: 30px;">
              <label for="bookName" class="control-label col-md-1">书籍名字</label>
              <div class="col-md-4">
                  <input name="bookName" class="form-control" id="bookName" required>
              </div>
          </div>
          <div class="form-group" style="margin-bottom: 30px;">
              <label for="bookCount" class="control-label col-md-1">书籍数量</label>
              <div class="col-md-4">
                  <input name="bookCounts" class="form-control" id="bookCount" required>
              </div>
          </div>
          <div class="form-group" style="margin-bottom: 30px;">
              <label for="bookDetail" class="control-label col-md-1">书籍详情</label>
              <div class="col-md-4">
                  <input name="detail" class="form-control" id="bookDetail" required>
              </div>
          </div>
          <div class="form-group" style="margin-bottom: 30px;">
              <div class="col-md-offset-1 col-md-2">
                  <button type="submit" class="btn btn-primary">提交</button>
              </div>
          </div>
      </form>
  
  
  </div>
  </body>
  
  </html>
  

4 删除书籍

• BookController删除方法

  	//删除书籍
      @RequestMapping("/deleteBook/{bookID}")
      public String deleteBook(@PathVariable("bookID") int id) {
          bookService.deleteBookById(id);
  
          return "redirect:/book/allBooks2";
      }
  

5 模糊搜索书籍

• BookMapper

  List<Books> queryBooksLikeName(@Param("name") String bookName);
  

• BookService

• BookServiceImpl

   public List<Books> queryBooksLikeName(String bookName) {
          String str ="%"+bookName+"%";
  //        String str = bookName;
          System.err.println("bookName -->" + bookName);
          return bookMapper.queryBooksLikeName(str);
   }
  

• BookController搜索方法

  	//根据书名，模糊搜索书籍
      @RequestMapping("/queryBooksLikeName")
      public String queryBooksLikeName(String bookName, Model model) {
          System.err.println("controller层bookName"+bookName);
          List<Books> list = bookService.queryBooksLikeName(bookName);
          model.addAttribute("list", list);
  
          return "allBooks";
      }
  

• 修改allBooks.jsp

  	<div class="row">
          <div class="col-md-4 column">
              <a class="btn btn-primary" href="${pageContext.request.contextPath}/book/toAddBook">新增书籍</a>
              <a class="btn btn-primary" href="${pageContext.request.contextPath}/book/allBooks2">显示全部书籍</a>
          </div>
          <div class="col-md-offset-4 col-md-4 column">
              <f	orm action="${pageContext.request.contextPath}/book/queryBooksLikeName"
                    method="post" class="form-inline">
                  <div class="form-group">
                      <input name="bookName" class="form-control">
                      <button class="btn btn-primary" type="submit">搜索</button>
                  </div>
              </form>
          </div>
      </div>
  

  
  

* 报错：

• aop报错

  Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'txPointCut': Lookup method resolution failed; nested exception is java.lang.IllegalStateException: Failed to introspect Class [org.springframework.aop.aspectj.AspectJExpressionPointcut] from ClassLoader [ParallelWebappClassLoader
  

  解决：

  不一定是aop相关的东西写错。中途加入的依赖，在project structure中要更新lib！