SSM整合

8、整合SSM

8.1、环境要求

环境:

  • IDEA
  • MySql 5.7
  • Tomcat 9
  • Maven 3.8

8.2、数据库环境

创建一个存放书籍数据的数据库表

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');

8.3、基本环境搭建

  1. 新建一Maven项目! ssmbuild , 添加web的支持

  2. 导入相关的pom依赖!

    <dependencies>
        <!--单元测试-->
        <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>8.0.28</version>
        </dependency>
        <!--数据库连接池-->
        <dependency>
            <groupId>com.mchange</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.5.5</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>2.2.1-b03</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>3.5.9</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>5.3.21</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.3.19</version>
        </dependency>
    
        <!--lombok工具-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.24</version>
        </dependency>
    </dependencies>
    
  3. Maven资源过滤设置

    <build>
        <resources>
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>true</filtering>
            </resource>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>false</filtering>
            </resource>
        </resources>
    </build>
    
  4. 建立基本结构和配置框架

    • com.yzh.pojo

    • com.yzh.dao

    • com.yzh.service

    • com.yzh.controller

    • 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>
      

8.4、Mybatis层

  1. 数据库配置文件 database.properties

    driver = com.mysql.cj.jdbc.Driver
    url = jdbc:mysql://localhost:3306/ssmbuild?useSSL=true&useUnicode=true&characterEncoding=utf8&serverTimezone=GMT%2B8
    username = root
    password = 123456
    
  2. IDEA关联数据库

  3. 编写MyBatis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>
        
        <typeAliases>
            <package name="com.yzh.pojo"/>
        </typeAliases>
        
        <mappers>
            <package name="com.yzh.dao"/>
        </mappers>
    </configuration>
    
  4. 编写对应的实体类 com.yzh.pojo.Books,使用lombok插件!

    @Data
    @AllArgsConstructor
    @NoArgsConstructor
    public class Books {
        private int bookID;
        private String bookName;
        private int bookCounts;
        private String detail;
    }
    
  5. 编写Dao层的 Mapper接口!

    public interface BookMapper {
    
        //增加一本书
        int addBook(Books book);
        //删除一本书
        int deleteBookById(@Param("bookID") int id);
        //修改一本书
        int updateBook(Books book);
        //查询一本书
        Books queryBookById(@Param("bookID")int id);
        //查询全部书
        List<Books> queryAllBooks();
    }
    
  6. 编写接口对应的 Mapper.xml 文件。需要导入MyBatis的包;

    <?xml version="1.0" encoding="UTF-8" ?>
    <!DOCTYPE mapper
            PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
            "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
    <mapper namespace="com.yzh.dao.BookMapper">
    
        <!--增加一本书-->
        <insert id="addBook" parameterType="books">
            insert into ssmbuild.books (bookName,bookCounts,detail) values (#{bookName},#{bookCounts},#{detail});
        </insert>
        <!--根据id删除一本书-->
        <delete id="deleteBookById" parameterType="_int">
            delete from ssmbuild.books where bookID = #{bookID};
        </delete>
        <!--根据id修改一本书-->
        <update id="updateBook" parameterType="_int">
            update ssmbuild.books
            set bookName = #{bookName},
                bookCounts = #{bookCounts},
                detail = #{detail}
            where bookID = #{bookID};
        </update>
        <!--根据id查询一本书-->
        <select id="queryBookById" resultType="books">
            select *
            from ssmbuild.books
            where bookID = #{bookID};
        </select>
        <!--查询所有书-->
        <select id="queryAllBooks" resultType="books">
            select *
            from ssmbuild.books;
        </select>
    </mapper>
    
  7. 编写Service层的接口和实现类,接口和Mapper方法一样,只是类名不同

    实现类:

    public class BookServiceImpl implements BookService {
        
        //调用dao层的操作,设置一个set接口,方便Spring管理
        private BookMapper bookMapper;
    	//之后使用注解之后可以不用手动set
        public void setBookMapper(BookMapper bookMapper) {
            this.bookMapper = bookMapper;
        }
    
        public int addBook(Books book) {
            return bookMapper.addBook(book);
        }
    
        public int deleteBookById(int id) {
            return bookMapper.deleteBookById(id);
        }
    
        public int updateBook(Books book) {
            return updateBook(book);
        }
    
        public Books queryBookById(int id) {
            return queryBookById(id);
        }
    
        public List<Books> queryAllBooks() {
            return queryAllBooks();
        }
    }
    

8.5、Spring层

  1. 配置Spring整合MyBatis,我们这里数据源使用c3p0连接池;

  2. 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: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(自动化的加载配置文件,并且可以自动设置到对象中)
                druid:阿里巴巴开源连接池
                hikari:spring底层连接池使用的
        -->
        <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
            <property name="driverClass" value="${driver}" />
            <property name="jdbcUrl" value="${url}" />
            <property name="user" value="${username}" />
            <property name="password" value="${password}" />
    
            <!-- c3p0连接池的私有属性(最大、小连接池个数) -->
            <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" />
        </bean>
    
        <!-- 4.配置dao接口扫描包,动态的实现了Dao接口可以注入到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.yzh.dao" />
        </bean>
    </beans>
    
  3. 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"
           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. 扫描service下的包-->
        <context:component-scan base-package="com.yzh.service" />
    
        <!-- 2. 将所有的业务类,注入到spring,可以通过配置,也可以通过注解-->
        <bean id="bookServiceImple" class="com.yzh.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-->
    </beans>
    

8.6、SpringMVC层

  1. 添加web支持,配置web.xml

    <?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>
                <!-- 配置的是总的spring配置文件-->
                <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过期时间-->
        <session-config>
            <!-- 过期时间15分钟-->
            <session-timeout>15</session-timeout>
        </session-config>
    </web-app>
    
  2. 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
            http://www.springframework.org/schema/mvc/spring-mvc.xsd
            http://www.springframework.org/schema/context
            http://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.yzh.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>
    
  3. 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>
    

Controller 和 视图层编写

  1. BookController 类编写 , 方法一:查询全部书籍

    @Controller
    @RequestMapping("/book")
    public class BookController {
    
        @Autowired
        @Qualifier("bookServiceImpl")
        private BookService bookService;
    
        //查询全部的书籍,并且返回到一个书籍展示页面
        @RequestMapping("/allBook")
        public String list(Model model){
            List<Books> list = bookService.queryAllBooks();
            model.addAttribute("list", list);
            return "allBook";
        }
    }
    
  2. 编写首页 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: 18px;
          }
          h3 {
            width: 180px;
            height: 38px;
            margin: 100px auto;
            text-align: center;
            line-height: 38px;
            background: deepskyblue;
            border-radius: 4px;
          }
        </style>
      </head>
      <body>
      <h3>
        <a href="${pageContext.request.contextPath}/book/allBook">进入书籍列表页</a>
      </h3>
      </body>
    </html>
    
  3. 书籍列表页面 allbook.jsp

    <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
    <%@ page contentType="text/html;charset=UTF-8" language="java" %>
    <html>
    <head>
        <title>书籍展示页面</title>
        <!-- 引入 Bootstrap -->
        <link href="https://cdn.bootcss.com/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>
            <div class="row">
                <div class="col-md-4 column">
                    <a class="btn btn-primary"
                       href="${pageContext.request.contextPath}/book/toAddBook">新增</a>
                </div>
            </div>
            <div class="row clearfix">
                <div class="col-md-12 column">
                    <table class="table table-hover table-striped">
                        <thead>
                            <tr>
                                <th>书籍编号</th>
                                <th>书籍名字</th>
                                <th>书籍数量</th>
                                <th>书籍详情</th>
                                <th>操作</th>
                            </tr>
                        </thead>
                        <tbody>
                            <c:forEach var="book" items="${requestScope.get('list')}">
                                <tr>
                                    <td>${book.getBookID()}</td>
                                    <td>${book.getBookName()}</td>
                                    <td>${book.getBookCounts()}</td>
                                    <td>${book.getDetail()}</td>
                                    <td>
                                        <a href="${pageContext.request.contextPath}/book/toUpdateBook?id=${book.getBookID()}">更改</a> |
                                        <a href="${pageContext.request.contextPath}/book/del/${book.getBookID()}">删除</a>
                                    </td>
                                </tr>
                            </c:forEach>
                        </tbody>
                    </table>
                </div>
            </div>
        </div>
    
    </body>
    </html>
    
  4. BookController 类编写 , 方法二:添加书籍

    //跳转到增加书籍页面
    @RequestMapping("/toAddBook")
    public String toAddBook() {
        return "addBook";
    }
    
    //添加书籍的请求}
    @RequestMapping("/addBook")
    public String addPaper(Books book) {
        bookService.addBook(book);
        return "redirect:/book/allBook";
    }
    
  5. 添加书籍页面:addBook.jsp

    <%@ page contentType="text/html;charset=UTF-8" language="java" %>
    <html>
    <head>
        <title>添加书籍页面</title>
        <!-- 引入 Bootstrap -->
        <link href="https://cdn.bootcss.com/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="${pageContext.request.contextPath}/book/addBook" method="post">
                <div class="form-group">
                    <label>书籍名称:</label>
                    <input type="text" name="bookName" class="form-control" required />
                </div>
                <div class="form-group">
                    <label>书籍数量:</label>
                    <input type="text" name="bookCounts" class="form-control" required />
                </div>
                <div class="form-group">
                    <label>书籍详情:</label>
                    <input type="text" name="detail" class="form-control" required />
                </div>
                <div class="form-group">
                    <input type="submit" class="form-control" value="添加">
                </div>
            </form>
        </div>
    </body>
    </html>
    
  6. BookController 类编写 , 方法三:修改书籍

    //跳转到修改书籍页面
    @RequestMapping("/toUpdateBook")
    public String toUpdateBook(int id, Model model) {
        Books book = bookService.queryBookById(id);
        model.addAttribute("QBook", book);
        return "updateBook";
    }
    
    //修改书籍的请求
    @RequestMapping("/updatePaper")
    public String updatePaper(Books book) {
        bookService.updateBook(book);
        return "redirect:/book/allBook";
    }
    
  7. 修改书籍页面 updateBook.jsp

    <%@ page contentType="text/html;charset=UTF-8" language="java" %>
    <html>
    <head>
        <title>修改书籍页面</title>
        <!-- 引入 Bootstrap -->
        <link href="https://cdn.bootcss.com/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="${pageContext.request.contextPath}/book/updatePaper" method="post">
    
                <!-- ID用隐藏域传输-->
                <input type="hidden" name="bookID" value="${QBook.bookID}">
    
                <div class="form-group">
                    <label>书籍名称:</label>
                    <input type="text" name="bookName" class="form-control" value="${QBook.bookName}" required />
                </div>
                <div class="form-group">
                    <label>书籍数量:</label>
                    <input type="text" name="bookCounts" class="form-control" value="${QBook.bookCounts}" required />
                </div>
                <div class="form-group">
                    <label>书籍详情:</label>
                    <input type="text" name="detail" class="form-control" value="${QBook.detail}" required />
                </div>
                <div class="form-group">
                    <input type="submit" class="form-control" value="修改">
                </div>
            </form>
        </div>
    </body>
    </html>
    
  8. BookController 类编写 , 方法四:删除书籍

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

8.7、实现查询书籍功能

  1. 前端页面增加一个输入框和查询按钮

    <div class="col-md-8 column">
        <form action="${pageContext.request.contextPath}/book/allBook" method="post" class="form-inline" style="float: right;">
            <span style="color: #ff0000; font-weight: bold">${error}</span>
            <input type="text" name="queryBookName" class="form-control" placeholder="请输入查询的书籍名称" />
            <input type="submit" class="btn btn-primary" value="查询" />
        </form>
    </div>
    
  2. 底层Mapper接口(使用查询所有书籍进行优化)

    //查询全部书
    List<Books> queryAllBooks(@Param("bookName") String queryBookName);
    
  3. 底层Mapper.xml

    <!--查询所有书-->
    <select id="queryAllBooks" resultType="books">
        select *
        from ssmbuild.books
        <where>
            <if test="bookName != null and bookName != ''">
                bookName like '%' #{bookName} '%'
            </if>
        </where>;
    </select>
    
  4. Service接口

    //查询全部书
    List<Books> queryAllBooks(String queryBookName);
    
  5. Service实现类

     public List<Books> queryAllBooks(String queryBookName) {
         return bookMapper.queryAllBooks(queryBookName);
     }
    
  6. 完善Controller

    //查询全部的书籍,并且返回到一个书籍展示页面
    @RequestMapping("/allBook")
    public String list(String queryBookName, Model model) {
        List<Books> list = bookService.queryAllBooks(queryBookName);
        model.addAttribute("list", list);
        return "allBook";
    }
    
  7. 测试基本发现可以查询

发现查询不存在的东西时页面为空,继续优化

  1. 在前端添加一个展示全部书籍的按钮

    <div class="col-md-4 column">
        <a class="btn btn-primary" href="${pageContext.request.contextPath}/book/toAddBook">新增</a>
        <a class="btn btn-primary" href="${pageContext.request.contextPath}/book/allBook">查看所有书籍</a>
    </div>
    
  2. 并在后台增加一些判断性的代码!

    if (list.isEmpty()){
        model.addAttribute("error", "未查到");
    }
    
  3. 将错误信息展示在前台页面!完整的查询栏代码

    <div class="col-md-8 column">
        <form action="${pageContext.request.contextPath}/book/allBook" method="post" class="form-inline" style="float: right;">
            <span style="color: #ff0000; font-weight: bold">${error}</span>
            <input type="text" name="queryBookName" class="form-control" placeholder="请输入查询的书籍名称" />
            <input type="submit" class="btn btn-primary" value="查询" />
        </form>
    </div>
    

END

posted @   lyluoye  阅读(18)  评论(0编辑  收藏  举报
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