• Maven-SSM框架整合


    1、创建Maven项目

    配置pom.xml依赖

    <!-- 允许创建jsp页面 -->
            <dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>servlet-api</artifactId>
                <version>2.5</version>
                <scope>provided</scope>
            </dependency>
            <!-- jsp页面标签 -->
            <dependency>
                <groupId>jstl</groupId>
                <artifactId>jstl</artifactId>
                <version>1.2</version>
            </dependency>
            <!-- jsp API -->
            <dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>jsp-api</artifactId>
                <version>2.0</version>
                <scope>provided</scope>
            </dependency>
            <!-- servlet Api -->
            <dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>javax.servlet-api</artifactId>
                <version>4.0.1</version>
                <scope>provided</scope>
            </dependency>
    
            <!-- SSM依赖 -->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-aop</artifactId>
                <version>4.2.1.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-aspects</artifactId>
                <version>4.2.1.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-beans</artifactId>
                <version>4.2.1.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-context</artifactId>
                <version>4.2.1.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-context-support</artifactId>
                <version>4.2.0.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-core</artifactId>
                <version>4.2.1.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-expression</artifactId>
                <version>4.2.1.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-instrument</artifactId>
                <version>4.2.1.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-instrument-tomcat</artifactId>
                <version>4.2.1.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-jdbc</artifactId>
                <version>4.2.1.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-jms</artifactId>
                <version>4.2.1.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-messaging</artifactId>
                <version>4.2.1.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-orm</artifactId>
                <version>4.2.1.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-oxm</artifactId>
                <version>4.2.1.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-test</artifactId>
                <version>4.2.1.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-web</artifactId>
                <version>4.2.1.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-webmvc</artifactId>
                <version>4.2.1.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-webmvc-portlet</artifactId>
                <version>4.2.1.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-websocket</artifactId>
                <version>4.2.1.RELEASE</version>
            </dependency>
            <!-- mybatis核心包 -->
            <dependency>
                <groupId>org.mybatis</groupId>
                <artifactId>mybatis</artifactId>
                <version>3.2.2</version>
            </dependency>
            <dependency>
                <groupId>org.mybatis</groupId>
                <artifactId>mybatis-spring</artifactId>
                <version>1.2.1</version>
            </dependency>
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>5.1.40</version>
            </dependency>
            <!-- jackjson,支持接口返回输出json格式 -->
            <dependency>
                <groupId>com.fasterxml.jackson.core</groupId>
                <artifactId>jackson-core</artifactId>
                <version>2.2.1</version>
            </dependency>
            <dependency>
                <groupId>com.fasterxml.jackson.core</groupId>
                <artifactId>jackson-databind</artifactId>
                <version>2.2.1</version>
            </dependency>
            <dependency>
                <groupId>com.fasterxml.jackson.core</groupId>
                <artifactId>jackson-annotations</artifactId>
                <version>2.2.1</version>
            </dependency>
            <!--打印日志 -->
            <dependency>
                <groupId>org.slf4j</groupId>
                <artifactId>slf4j-api</artifactId>
                <version>1.7.5</version>
            </dependency>
            <dependency>
                <groupId>org.slf4j</groupId>
                <artifactId>slf4j-log4j12</artifactId>
                <version>1.7.5</version>
            </dependency>
            <dependency>
                <groupId>log4j</groupId>
                <artifactId>log4j</artifactId>
                <version>1.2.17</version>
            </dependency>
            <dependency>
                <groupId>jstl</groupId>
                <artifactId>jstl</artifactId>
                <version>1.2</version>
            </dependency>
            
            <!-- 文件上传处理 -->
            <dependency>
                <groupId>commons-fileupload</groupId>
                <artifactId>commons-fileupload</artifactId>
                <version>1.3.2</version>
            </dependency>
    <build>
            <finalName>SSM-project</finalName>
            <plugins>
                <!--JDK版本 -->
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <version>2.5.1</version>
                    <configuration>
                        <source>1.8</source>
                        <target>1.8</target>
                        <encoding>UTF-8</encoding>
                        <showWarnings>true</showWarnings>
                    </configuration>
                </plugin>
    
                <!-- Tomcat7插件 -->
                <plugin>
                    <groupId>org.apache.tomcat.maven</groupId>
                    <!-- tomcat7的插件, 不同tomcat版本这个也不一样 -->
                    <artifactId>tomcat7-maven-plugin</artifactId>
                    <version>2.1</version>
                    <configuration>
                        <!-- 通过maven tomcat7:run运行项目时,访问项目的端口号 -->
                        <port>8080</port>
                        <!-- 项目访问路径 本例:localhost:9090, 如果配置的aa, 则访问路径为localhost:9090/aa -->
                        <path>/SpringMVC_Maven</path>
                        <uriEncoding>UTF-8</uriEncoding>
                    </configuration>
                </plugin>
            </plugins>
        </build>

    2、导入db.properties

    dataSource.driverName=com.mysql.jdbc.Driver
    dataSource.jdbcUrl=jdbc:mysql://{主机IP}/{数据库名称}
    dataSource.user={数据库用户名}
    dataSource.password={数据库密码}
    

     

    导入日志:log4j.properties

    log4j.rootLogger=Console,File
    log4j.appender.Console=org.apache.log4j.ConsoleAppender
    log4j.appender.Console.Target=System.out
    log4j.appender.Console.layout=org.apache.log4j.PatternLayout
    log4j.appender.Console.layout.ConversionPattern=[%c]%m%n
    log4j.appender.File=org.apache.log4j.RollingFileAppender 
    log4j.appender.File.File=../log/error.log
    log4j.appender.File.MaxFileSize=10MB
    log4j.appender.File.Threshold=ALL
    log4j.appender.File.layout=org.apache.log4j.PatternLayout
    log4j.appender.File.layout.ConversionPattern=[%p][%d{yyyy-MM-dd HH:mm:ss,SSS}][%c]%m%n

    3、配置springMVC配置文件:src/main/resources/springmvc/springmvc-config.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:p="http://www.springframework.org/schema/p"
        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/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">
        <!-- 扫描器,指定DispatcherServlet去扫描当前包名下的所有类, base-package属性不能精确到类级别,只能到包级别 -->
        <context:component-scan
            base-package="com.maven.controller" />
        <!-- exception -->
        <context:component-scan
            base-package="com.maven.exception" />
        <!-- 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>
        
        <!-- 解决@ResponseBody中文乱码 -->
        <mvc:annotation-driven>
            <mvc:message-converters>
                <bean class="org.springframework.http.converter.StringHttpMessageConverter">
                    <constructor-arg value="UTF-8" />
                </bean>
            </mvc:message-converters>
        </mvc:annotation-driven>    
        <!-- 文件上传配置 -->
         <bean id="multipartResolver"
            class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
           <!--  defaultEncoding:请求的编码格式必须和用户JSP的编码一致,以便正确读取表单中的内容。 
                uploadTempDir:文件上传过程中的临时目录,上传完成后,临时文件会自动删除 
                maxUploadSize:设置文件上传大小上限(单位为字节)-1为无限制 -->
            <property name="defaultEncoding" value="UTF-8" />
            <property name="maxUploadSize" value="102400000" /> 
           <!--  uploadTempDir可以不做设置,有默认的路径,上传完毕会临时文件会自动被清理掉 -->
            <property name="uploadTempDir" value="/upload/"></property>
        </bean> 
    
        <!-- 处理器映射器 -->
        <!-- <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping" 
            /> -->
    
        <!-- 处理器适配器 -->
        <!-- <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter" 
            /> -->
    
        <!-- 配置注解驱动,配置之后就不用配置处理器映射器和处理器适配器了 -->
        <mvc:annotation-driven />
        <!-- 静态资源不拦截 -->
        <mvc:resources location="/staitcSources/"
            mapping="/staitcSources/**" />
    
        <!-- 配置拦截器,可以配置多个拦截器,按顺序执行 -->
        <!-- <mvc:interceptors>
            第一个拦截器
            <mvc:interceptor>
                <mvc:mapping path="/**" /> 所有请求都拦截
                <mvc:exclude-mapping path="/staticRescoures/**"/> 静态资源不拦截
                <bean class="org.sprigmvc.Interceptor.MyInterceptor1" />
            </mvc:interceptor>
            第二个拦截器
            <mvc:interceptor>
                <mvc:mapping path="/**" /> 所有请求都拦截
                <mvc:exclude-mapping path="/staticRescoures/**"/> 静态资源不拦截
                <bean class="org.sprigmvc.Interceptor.MyInterceptor2" />
            </mvc:interceptor>
        </mvc:interceptors> -->
    </beans>

    4、配置mybaits配置文件:src/main/resources/mybaits/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>
          <!-- 别名 -->
          <typeAliases>
              <typeAlias type="com.maven.pojo.animalPojo" alias="Animal"/>
              <typeAlias type="com.maven.pojo.cttablePojo" alias="Cttable"/>
          </typeAliases>
    </configuration>

    5、配置spring配置文件:/resources/spring/applicationContent-dao.xml

    <?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:p="http://www.springframework.org/schema/p"
        xmlns:context="http://www.springframework.org/schema/context"
        xmlns:tx="http://www.springframework.org/schema/tx"
        xmlns:aop="http://www.springframework.org/schema/aop"
        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-4.0.xsd
            http://www.springframework.org/schema/context
            http://www.springframework.org/schema/context/spring-context-4.0.xsd
            http://www.springframework.org/schema/tx
            http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
            http://www.springframework.org/schema/aop
            http://www.springframework.org/schema/aop/spring-aop-4.0.xsd">
    
        <!-- 数据源 -->
        <context:property-placeholder
            location="classpath:db.properties" ignore-unresolvable="true" />
        <bean id="dataSource"
            class="org.springframework.jdbc.datasource.DriverManagerDataSource">
            <property name="driverClassName" value="${dataSource.driverName}" />
            <property name="url" value="${dataSource.jdbcUrl}" />
            <property name="username" value="${dataSource.user}" />
            <property name="password" value="${dataSource.password}" />
        </bean>
        <!-- 会话工厂 -->
        <bean id="sqlSessionFactory"
            class="org.mybatis.spring.SqlSessionFactoryBean">
            <property name="dataSource" ref="dataSource"></property>
            <!-- 载入mybaits配置文件 -->
            <property name="configLocation"
                value="classpath:mybaits/mybatis-config.xml"></property>
            <!-- 载入SQL映射文件 -->
            <property name="mapperLocations"
                value="classpath:com/maven/dao/*.xml"></property>
        </bean>
        <!-- 事务管理器 -->
        <bean id="txManager"
            class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
            <property name="dataSource" ref="dataSource" />
        </bean>
        
         <!-- 事务注解驱动,注解@Transactional的类和方法将具有事务性 
            <tx:annotation-driven transaction-manager="txManager" />-->
            
        <!-- 配置事务增强处理Bean,指定事务管理器 -->
        <tx:advice id="txAdvice"
            transaction-manager="txManager">
            <!-- 用于配置详细的事务传播、隔离、是否只读等属性, 这些属性会封装到底层事务代码中的TransactionDefinition中 -->
            <tx:attributes>
                <!-- 所有以'get'开头的方法是read-only的 事务的隔离性isolation="DEFAULT" 事务的传播行为 propagation="REQUIRED" 
                    REQUIRED 支持当前的事务,如果不存在就创建一个新的。这是最常用的选择。 SUPPORTS 支持当前的事务,如果不存在就不使用事务。 MANDATORY 
                    支持当前的事务,如果不存在就抛出异常。 REQUIRES_NEW 创建一个新的事务,并暂停当前的事务(如果存在)。 NOT_SUPPORTED 不使用事务,并暂停当前的事务(如果存在)。 
                    NEVER 不使用事务,如果当前存在事务就抛出异常。 NESTED 如果当前存在事务就作为嵌入事务执行,否则与REQUIRED类似。 事务的超时 
                    timeout="-1" -1为永不超时,8代表8秒超时 -->
                <tx:method name="get*,login*" read-only="true"
                    isolation="DEFAULT" propagation="REQUIRED" timeout="-1" />
                <!-- 其他方法使用默认的事务设置 -->
                <tx:method name="*" />
            </tx:attributes>
        </tx:advice>
    
        <aop:config>
            <!-- 配置一个切入点,org.fkjava.service以及子包下面的所有类需要做事务 -->
            <aop:pointcut id="pointcut"
                expression="execution(* com.maven.service..*ServiceImpl.*(..))" />
    
            <!-- 指定在pointcut切入点应用txAdvice事务增强处理 aop:advisor的作用是在已有的advice前提下,通过该元素指定将advice织入哪些位置 -->
            <aop:advisor advice-ref="txAdvice" pointcut-ref="pointcut" />
        </aop:config>
    
    </beans>

    配置spring-service层:/resources/spring/applicationContent-service.xml

    <?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:p="http://www.springframework.org/schema/p"
        xmlns:context="http://www.springframework.org/schema/context"
        xmlns:tx="http://www.springframework.org/schema/tx"
        xmlns:aop="http://www.springframework.org/schema/aop"
        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-4.0.xsd
            http://www.springframework.org/schema/context
            http://www.springframework.org/schema/context/spring-context-4.0.xsd
            http://www.springframework.org/schema/tx
            http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
            http://www.springframework.org/schema/aop
            http://www.springframework.org/schema/aop/spring-aop-4.0.xsd">
            
       <beans>
            <bean id="userdao" class="com.maven.service.impl.UserServiceImpl" p:sqlSessionFactory-ref="sqlSessionFactory"></bean>
        </beans>
    </beans>

    6、配置web.xml

     <!-- log4j配置 -->
        <context-param>
            <param-name>log4jConfigLocation</param-name>
            <param-value>classpath:log4j.properties</param-value>
        </context-param>
        <listener>
            <listener-class>org.springframework.web.util.Log4jConfigListener
            </listener-class>
        </listener>
        
         <!-- Spring容器加载所有的配置文件的路径 -->
        <context-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>
                classpath:spring/applicationContent-*.xml
            </param-value>
        </context-param>
        <listener>
            <listener-class>org.springframework.web.context.ContextLoaderListener
            </listener-class>
        </listener>
        
         <!-- 配置SpringMVC核心控制器 -->
            <servlet>
            <servlet-name>MVC</servlet-name>
            <!-- SpringMVC的中央处理器:DispathcherServlet有,其成为分派器, 把所有的请求url分派给其他的处理器 -->
            <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
            <init-param>
                <param-name>contextConfigLocation</param-name>
                <param-value>classpath:springmvc/springmvc-config.xml</param-value>
            </init-param>
            <load-on-startup>1</load-on-startup> <!-- 加载的时候就启动 -->
        </servlet>
        <servlet-mapping>
            <servlet-name>MVC</servlet-name>
            <url-pattern>/</url-pattern>
        </servlet-mapping>
        
        <!-- 解决中文乱码 -->
        <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>
        
        <!-- 404页面 -->
        <error-page>
           <error-code>404</error-code>
           <location>/404.jsp</location>
        </error-page>

    自此,最基本的配置就完成了,用的时候注意改相对应的配置文件地址

    7、最简单的测试

    UserLoginController:

    package com.maven.controller;
    
    import java.util.List;
    
    import javax.annotation.Resource;
    
    import org.springframework.stereotype.Controller;
    import org.springframework.stereotype.Repository;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.ResponseBody;
    import org.springframework.web.portlet.ModelAndView;
    
    import com.maven.pojo.animalPojo;
    import com.maven.service.UserService;
    
    @Controller
    public class UserLoginController {
        @Resource(name="userdao")
        private UserService userservice;
       @RequestMapping(value="/home")
       @ResponseBody
       public ModelAndView login(ModelAndView mv) {
           List<animalPojo> list=userservice.getAllDate();
           mv.setViewName("home");
           mv.addObject("json", list);
           System.out.println(list);
           return mv;
       }
    }

    animalMapper,java

    package com.maven.dao;
    
    import java.util.List;
    
    import com.maven.pojo.animalPojo;
    
    public interface animalMapper {
        List<animalPojo> selectAllData();
    }

    animalMapper.xml

    <?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.maven.dao.animalMapper">
        <resultMap type="Animal" id="AnimalResultMap">
               <id column="id" property="id"/>
               <result column="Species_id" property="SpeciesId"/>
               <result column="animal" property="animalName"/>
        </resultMap>
        <select id="selectAllData" resultMap="AnimalResultMap">
               select *from animal
        </select>
    </mapper>

    animalPojo.java

    package com.maven.pojo;
    
    public class animalPojo {
          private int id;
          private String SpeciesId;
          private String animalName;
        public int getId() {
            return id;
        }
        public void setId(int id) {
            this.id = id;
        }
        public String getSpeciesId() {
            return SpeciesId;
        }
        public void setSpeciesId(String speciesId) {
            SpeciesId = speciesId;
        }
        public String getAnimalName() {
            return animalName;
        }
        public void setAnimalName(String animalName) {
            this.animalName = animalName;
        }
        @Override
        public String toString() {
            return "animalPojo [id=" + id + ", SpeciesId=" + SpeciesId + ", animalName=" + animalName + "]";
        }
        public animalPojo() {
            super();
            // TODO Auto-generated constructor stub
        }
        public animalPojo(int id, String speciesId, String animalName) {
            super();
            this.id = id;
            SpeciesId = speciesId;
            this.animalName = animalName;
        }
          
    }

    cttablePojo.java

    package com.maven.pojo;
    
    public class cttablePojo {
         private Integer id;
         private String Species;
        public Integer getId() {
            return id;
        }
        public void setId(Integer id) {
            this.id = id;
        }
        public String getSpecies() {
            return Species;
        }
        public void setSpecies(String species) {
            Species = species;
        }
        @Override
        public String toString() {
            return "cttablePojo [id=" + id + ", Species=" + Species + "]";
        }
        public cttablePojo() {
            super();
            // TODO Auto-generated constructor stub
        }
        public cttablePojo(Integer id, String species) {
            super();
            this.id = id;
            Species = species;
        }
         
    }

    UserService.java

    package com.maven.service;
    
    import java.util.List;
    
    import com.maven.pojo.animalPojo;
    
    public interface UserService {
         /**
          * 获取animal所有的数据
          * */
        List<animalPojo> getAllDate();
    }

    UserServiceImpl.java

    package com.maven.service.impl;
    
    import java.util.List;
    
    import javax.annotation.Resource;
    
    import org.apache.ibatis.session.SqlSession;
    import org.apache.ibatis.session.SqlSessionFactory;
    import org.springframework.stereotype.Repository;
    
    import com.maven.dao.animalMapper;
    import com.maven.pojo.animalPojo;
    import com.maven.service.UserService;
    
    public class UserServiceImpl implements UserService {
        
        private SqlSessionFactory sqlSessionFactory;
        
        public SqlSessionFactory getSqlSessionFactory() {
            return sqlSessionFactory;
        }
    
        public void setSqlSessionFactory(SqlSessionFactory sqlSessionFactory) {
            this.sqlSessionFactory = sqlSessionFactory;
        }
        public UserServiceImpl() {}
        @Override
        public List<animalPojo> getAllDate() {
            // TODO Auto-generated method stub
            SqlSession session=sqlSessionFactory.openSession();
            animalMapper am=session.getMapper(animalMapper.class);
            return am.selectAllData();
        }
    
    }

    结果:

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  • 原文地址:https://www.cnblogs.com/hzb462606/p/9200775.html
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