一。环境准备

1。开发工具:IDEA

2。JDK版本:jdk1.8

3。Maven版本:apache-maven-3.2.5

4。数据库mysql.

二。基于Maven构建web项目

Step1:File->new module

Step2:Next->输入坐标值(GroupId/ArtifactId/version)

Step3:配置maven及maven所在仓库

Step4:指定模块名及所在文件目录

OK。

基于Maven搭建单模块web项目框架已完成!

三。完整包结构

最终项目结构如下图所示:

注意点:

Dao的Mapper.xml文件存储位置放到resources目录下面。放置到java目录下面,会一直报Mybatis绑定错误。

四。配置文件

1。依赖配置(pom.xml)

 <?xml version="1.0" encoding="UTF-8"?>

 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion> <groupId>com.yufeng.web</groupId>
<artifactId>web-ssm-single</artifactId>
<packaging>war</packaging> <name>web-ssm-single Maven Webapp</name> <properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<jdk.version>1.8</jdk.version>
<spring.version>4.2.5.RELEASE</spring.version>
<mysql.version>5.1.6</mysql.version>
<c3p0.version>0.9.1.2</c3p0.version>
</properties> <dependencies>
<!-- 1.数据库相关依赖-->
<!-- 1.1).mysql-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
<!-- 1.2).c3p0数据连接池-->
<dependency>
<groupId>c3p0</groupId>
<artifactId>c3p0</artifactId>
<version>${c3p0.version}</version>
</dependency> <!-- 2.dao框架:MyBatis依赖-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.2.4</version>
</dependency>
<!--mybatis自身实现的spring整合依赖-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.2.2</version>
</dependency> <!-- 3.Servlet web相关依赖-->
<dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>1.1.2</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
<type>jar</type>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.9.3</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency> <!--4.Spring依赖 -->
<!--4.1)Spring核心依赖 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<!--4.2)spring dao层依赖-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency>
<!--4.3)springweb相关依赖-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<!--4.4)spring test相关依赖 不加则@RunWith(SpringJUnit4ClassRunner.class)不能应用-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
</dependency> <!--3.0的junit是使用编程的方式来进行测试,而junit4是使用注解的方式来运行junit -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.9</version>
<scope>test</scope>
</dependency> <!--log依赖 -->
<!--
1.日志 java日志有:slf4j,log4j,logback,common-logging
slf4j:是规范/接口
日志实现:log4j,logback,common-logging
使用:slf4j+logback
-->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.5</version>
</dependency>
</dependencies> <build>
<finalName>web-ssm-single</finalName>
<pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>${jdk.version}</source>
<target>${jdk.version}</target>
<encoding>${project.build.sourceEncoding}</encoding>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-resources-plugin</artifactId>
<version>2.5</version>
</plugin>
</plugins>
</pluginManagement>
</build>
</project>

2。jdbc属性配置(jdbc.properties)

 #数据库连接配置信息
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://127.0.0.1:3306/learn
jdbc.username=root
jdbc.userpwd=root

3。mybatis配置(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>
<!-- mybatis全局配置文件-->
<!-- 配置全局属性-->
<settings>
<!-- 使用jdbc的getGeneratekeys获取自增主键值-->
<setting name="useGeneratedKeys" value="true"/>
<!--使用列别名替换列名,默认值为true
select name as title(实体中的属性名为title) from table
开启后,mybatis会自动帮我们把表中的值赋到对应实体的title上。
-->
<setting name="useColumnLabel" value="true" />
<!-- 开启驼峰命名转换Table:create_time到Entity:createTime-->
<setting name="mapUnderscoreToCamelCase" value="false" />
</settings>
</configuration>

4。Spring & Mybatis整合配置(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"> <!--Spring整合mybatis文件相关配置 --> <!-- Step1:配置数据库相关参数(引入属性文件)-->
<context:property-placeholder location="classpath:/properties/jdbc.properties" /> <!--Step2:配置数据库连接池 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" >
<!--配置连接池属性 -->
<property name="driverClass" value="${jdbc.driver}" /> <!-- 基本属性:连接url/username/password-->
<property name="jdbcUrl" value="${jdbc.url}" />
<property name="user" value="${jdbc.username}" />
<property name="password" value="${jdbc.userpwd}" /> <!-- c3p0私有属性-->
<property name="maxPoolSize" value="30" />
<property name="minPoolSize" value="10" />
<!-- 关闭连接后不自动提交-->
<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> <!--约定大于配置 -->
<!-- Step3: 配置sqlSessionFactory对象-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean" >
<!-- mybatis & Spring整合真正配置(以下)-->
<!--注入数据库连接池 -->
<property name="dataSource" ref="dataSource" />
<!-- 配置mybatis全局配置文件:mybatis-config.xml-->
<property name="configLocation" value="classpath:/config/mybatis-config.xml" />
<!-- 扫描entity包,使用别名,多个用;隔开-->
<property name="typeAliasesPackage" value="com.csvalue.model" />
<!-- 扫描sql配置文件:mapper需要的xml文件-->
<property name="mapperLocations" value="classpath:/mapper/*Mapper.xml" />
</bean> <!--Step4:配置扫描dao接口包,动态实现Dao接口,注入到spring容器 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer" >
<!--注入SqlSessionFactory -->
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
<!-- 给出需要扫描的dao接口-->
<property name="basePackage" value="com.csvalue.dao" />
</bean>
</beans>

5。Springmvc配置(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: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
http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <!--配置springmvc -->
<!-- Step1:开启springmvc注解模式
【1】。自动注册:DefaultAnnotaionHandlerMapping,AnnotationMethodHandlerAdaptor
【2】。默认提供一系列的功能,数据绑定,数字和日期的format@NumberFormat,@DateTimeFormat
【3】。xml,json的默认读写支持
-->
<mvc:annotation-driven /> <!-- Step2:静态资源默认servlet配置 -->
<!--
【1】。加入对静态资源处理:js/gif/png...
【2】。允许使用"/"做整体映射
-->
<mvc:default-servlet-handler /> <!--Step3:配置jsp,显示ViewResolver -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix" value="/WEB-INF/view/"/>
<property name="suffix" value=".jsp" />
</bean> <!-- Step4:扫描web相关的bean-->
<context:component-scan base-package="com.csvalue.controller" /> </beans>

6。Spring事务管理(spring-service.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"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
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/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-4.2.xsd"> <!--Spring事务配置文件 --> <!-- 扫描service包下的所有使用注解的类型-->
<context:component-scan base-package="com.csvalue.service" /> <!-- 配置事务管理器(真正管理事务)-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager" >
<!-- 注入数据库连接池-->
<property name="dataSource" ref="dataSource" />
</bean> <!-- 配置基于注解的声明式事务。默认使用注解来管理事务行为-->
<!--<tx:annotation-driven transaction-manager="transactionManager" />--> <!--为事务transactionManager增强 -->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<!-- 写操作-->
<tx:method name="insert*" propagation="REQUIRED" isolation="DEFAULT" rollback-for="Exception"/>
<tx:method name="update*" propagation="REQUIRED" isolation="DEFAULT" rollback-for="Exception"/>
<tx:method name="delete*" propagation="REQUIRED" isolation="DEFAULT" rollback-for="Exception"/>
<!-- 读操作-->
<tx:method name="find*" propagation="SUPPORTS" isolation="DEFAULT" read-only="true"/>
<tx:method name="get*" propagation="SUPPORTS" isolation="DEFAULT" read-only="true"/>
<tx:method name="query*" propagation="SUPPORTS" isolation="DEFAULT" read-only="true"/>
</tx:attributes>
</tx:advice> <!-- 定义AOP切面管理器,指定事务作用到哪。-->
<aop:config>
<!-- 定义切面在所有service包下-->
<aop:pointcut id="txPointcut" expression="execution(* com.csvalue.service..*.*(..))"/>
<!-- 把事务控制在service层-->
<aop:advisor advice-ref="txAdvice" pointcut-ref="txPointcut" />
</aop:config>
</beans>

7。Spring总配置文件整合spring相关配置(applicationContext.xml)(不指定)

注:也可以不使用该文件,指定spring配置时,直接指定:classpath:/config/spring-*.xml即可。

 <?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:/config/spring-dao.xml" />
<import resource="classpath:/config/spring-service.xml" />
<import resource="classpath:/config/spring-mvc.xml" />
</beans>

8。web配置(web.xml)

 <?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
version="2.5"> <!-- DispatcherServlet,Spring MVC的核心
配置springmvc需要配置文件
spring-dao.xml , spring-service.xml,spring-mvc.xml
mybatis -> spring -> springmvc
-->
<servlet>
<servlet-name>mvc-dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:/config/spring-*.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>mvc-dispatcher</servlet-name>
<!--MVC拦截所有请求 -->
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>

五。示例代码

1。User.java(模型类)

 package com.csvalue.model;

 public class User {
private Long userId;
private String userName;
private String userPwd;
private Long age;
private String email; public Long getUserId() {
return userId;
} public void setUserId(Long userId) {
this.userId = userId;
} public String getUserName() {
return userName;
} public void setUserName(String userName) {
this.userName = userName;
} public String getUserPwd() {
return userPwd;
} public void setUserPwd(String userPwd) {
this.userPwd = userPwd;
} public Long getAge() {
return age;
} public void setAge(Long age) {
this.age = age;
} public String getEmail() {
return email;
} public void setEmail(String email) {
this.email = email;
} @Override
public String toString() {
return "User{" +
"userId=" + userId +
", userName='" + userName + '\'' +
", userPwd='" + userPwd + '\'' +
", age=" + age +
", email='" + email + '\'' +
'}';
}
}

2。UserDao.java(Dao层接口)

 package com.csvalue.dao;

 import com.csvalue.model.User;
import org.springframework.stereotype.Repository; import java.util.List; @Repository
public interface UserMapper { public List<User> queryUserList();
}

3。UserMapper.xml(Dao层mapper映射)

 <?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.csvalue.dao.UserMapper"> <resultMap id="userResultMap" type="com.csvalue.model.User">
<id column="user_id" jdbcType="BIGINT" property="userId" />
<result column="user_name" jdbcType="VARCHAR" property="userName" />
<result column="user_pwd" jdbcType="VARCHAR" property="userPwd" />
<result column="age" jdbcType="BIGINT" property="age" />
<result column="email" jdbcType="VARCHAR" property="email" />
</resultMap> <select id="queryUserList" resultMap="userResultMap">
select user_id,user_name,user_pwd,age,email from com_user
</select> <select id="queryUserList1" resultType="com.csvalue.model.User">
select user_id,user_name,user_pwd,age,email from com_user
</select>
</mapper>

4。IUserService.java(service接口)

 package com.csvalue.service;

 import com.csvalue.model.User;

 import java.util.List;

 public interface IUserService {
List<User> queryUserList();
}

5。UserService.java(service实现类)

 package com.csvalue.service.impl;

 import com.csvalue.dao.UserMapper;
import com.csvalue.model.User;
import com.csvalue.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service; import java.util.List; @Service
public class UserServiceImpl implements IUserService { @Autowired
private UserMapper userMapper; @Override
public List<User> queryUserList() {
return userMapper.queryUserList();
}
}

6。UserController.java(Controller类)

 package com.csvalue.controller;

 import com.csvalue.model.User;
import com.csvalue.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody; import java.util.List; @Controller
@RequestMapping("/user")
public class UserController {
@Autowired
private IUserService iUserService; @ResponseBody
@RequestMapping(value = "/query",method = {RequestMethod.GET,RequestMethod.POST})
public String queryUserList(){
List<User> userList=iUserService.queryUserList();
for (User user:userList){
System.out.println("out=>"+user.toString());
}
return "hello springmvc";
}
}

部署tomcat

在web.xml中添加欢迎页index.jsp,不添加默认也为index.jsp(不指定)

  <welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>

index.jsp文件内容

 <html>
<body>
<h2>Hello World!</h2>
<h3><a href="/user/query">send request</a></h3>
</body>
</html>

浏览器启动,效果如下:

点击“send reques”链接-》

7。IUserServiceTest(测试类)

创建测试类:在所需要测试的service接口上,按住ctrl+shift+t键。mac是command+shift+t键

创建新的测试类即可。

 package com.csvalue.service;

 import com.csvalue.model.User;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner; import java.util.List; import static org.junit.Assert.*; @RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = {"classpath:applicationContext.xml"})
public class IUserServiceTest { @Autowired
IUserService iUserService; /**
* 测试查询用户列表:开启/关闭mybatis驼峰命名
* */
@Test
public void queryUserList() {
List<User> userList=iUserService.queryUserList();
for(User user:userList){
System.out.println("out=>"+user.toString());
}
}
}

六。常见问题汇总

1。注意:*Mapper.xml文件包位置

由于*Mapper.xml文件放置到java/目录下面。所以导致mybatis绑定错误。

2。MyBatis绑定错误:Invalid bound statement (not found)

可参考博客:https://my.oschina.net/wangdaoliang/blog/652266

上述发现target中mapper包/*mapper.xml未加载进来。IDEA默认加载resources包下的资源文件。

所以。修改mapper包位置(由java目录下转移到resources目录下面)即可。

总结:

【1】、检查xml文件所在的package名称是否和interface对应的package名称一一对应

【2】、检查xml文件的namespace是否和xml文件的package名称一一对应

【3】、检查函数名称能否对应上

【4】、去掉xml文件中的中文注释

【5】、随意在xml文件中加一个空格或者空行然后保存

【6】、mapper.xml文件是否有用错误的标签

3。org.apache.ibatis.type.TypeException: Could not resolve type alias 'BIGINT'

问题原因:UserMapper.xml文件错误,类型为jdbcType而不是javaType。

4。编译生成的target文件内容不全,如没有配置文件等。

解决方案:可先删除target,重新用maven编译,可右击项目-》Rebuild Module...即可。

5。注意spring-service.xml事务文件,加该段代码有时候会报错。可以先去掉该事务配置。

 <!--为事务transactionManager增强 -->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<!-- 写操作-->
<tx:method name="insert*" propagation="REQUIRED" isolation="DEFAULT" rollback-for="Exception"/>
<tx:method name="update*" propagation="REQUIRED" isolation="DEFAULT" rollback-for="Exception"/>
<tx:method name="delete*" propagation="REQUIRED" isolation="DEFAULT" rollback-for="Exception"/>
<!-- 读操作-->
<tx:method name="find*" propagation="SUPPORTS" isolation="DEFAULT" read-only="true"/>
<tx:method name="get*" propagation="SUPPORTS" isolation="DEFAULT" read-only="true"/>
<tx:method name="query*" propagation="SUPPORTS" isolation="DEFAULT" read-only="true"/>
</tx:attributes>
</tx:advice> <!-- 定义AOP切面管理器,指定事务作用到哪。-->
<aop:config>
<!-- 定义切面在所有service包下-->
<aop:pointcut id="txPointcut" expression="execution(* com.csvalue.service..*.*(..))"/>
<!-- 把事务控制在service层-->
<aop:advisor advice-ref="txAdvice" pointcut-ref="txPointcut" />
</aop:config>

6。启动项目时,浏览器访问会找不到Controller.注意几点:

【1】配置文件所配置的controller包路径是否正确(spring-mvc.xml)

【2】controller类上是否包含@Controller注解。(注解是否加上)

【3】路径名是否写正确。(@RequestMapping指定的路径及指定的method是get/post)

7。将项目添加到github,以方便后续查看。

step1:  登录gitHub(https://github.com/),账号/密码;yufeng_2016@sina.com/a+0

step2: myworkspace目录下初始化git ($ git init)

step3: 提交文件到暂存区 ($ git add *    |   $ git commit -m "springmvc")

step4: 本地仓库与远程仓库建立连接(git remote add origin https://github.com/shi***)

step5:向远程仓库推送代码($ git push origin master)

此时报错。

解决方案,输入命令:

https://stackoverflow.com/questions/18328800/github-updates-were-rejected-because-the-remote-contains-work-that-you-do-not-h

git pull origin master --allow-unrelated-histories

此时会进入编辑界面,输入:q!退出即可。效果如下所示:

再执行step5,向远程仓库推送代码。($ git push origin master)

8。打war包。部署。制作docker镜像。

-》构建war包

本文代码地址:https://github.com/shiyufeng0919/kaixinyufeng/tree/master/idea/ssm-web

本文参考博客:https://blog.csdn.net/cjq2013/article/details/76166173

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