Spring中的IOC控制Mybatis案例

其他 2020-08-12 11:28:30 阅读次数: 0

我们之前的案例都是基于单独的Mybatis练习，本次案例结合Spring的IOC管理Bean的方式来调用Mybatis中的数据库操作。这次案例中我们可以通过2种方式运行你的Mybatis.
1 通过Srping的bean在junit完成测试
2 通过Web应用程序上下文，监听方式来加载Mybatis和Spring管理
一 我们先来看看数据库个结构，很简单就一个表
在这里插入图片描述
在这里插入图片描述
二 通过idea工具下的Maven创建项目的结构。我们依然使用Maven的聚合方式来管理项目结构
在这里插入图片描述
在这里插入图片描述
1 父项目的pom文件内容；这里面定义项目整体会用到的JAR包。通过《dependency》方式引入JAR包

<?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.zxf</groupId>
  <artifactId>SpringProject</artifactId>
  <packaging>pom</packaging>
  <version>1.0-SNAPSHOT</version>
  <modules>
    <module>Spring-web1</module>
  </modules>
    <!--对依赖的坐标的版本做集中管理-->
    <properties>
        <junit.version>4.12</junit.version>
        <mybatis.version>3.2.8</mybatis.version>
        <mysql.version>5.1.32</mysql.version>
        <jstl.version>1.2</jstl.version>
        <servlet.version>3.1.0</servlet.version>
        <jsp.version>2.0</jsp.version>
        <log4j.version>1.2.17</log4j.version>

        <spring-aop.version>4.1.6.RELEASE</spring-aop.version>
        <spring-aspects.version>4.1.6.RELEASE</spring-aspects.version>
        <spring-beans.version>4.1.6.RELEASE</spring-beans.version>
        <spring-context.version>4.1.6.RELEASE</spring-context.version>
        <spring-context-support.version>4.1.6.RELEASE</spring-context-support.version>
        <spring-core.version>4.1.6.RELEASE</spring-core.version>
        <spring-expression.version>4.1.6.RELEASE</spring-expression.version>
        <spring-instrument.version>4.1.6.RELEASE</spring-instrument.version>
        <spring-instrument-tomcat.version>4.1.6.RELEASE</spring-instrument-tomcat.version>
        <spring-jdbc.version>4.1.6.RELEASE</spring-jdbc.version>
        <spring-jms.version>4.1.6.RELEASE</spring-jms.version>
        <spring-messaging.version>4.1.6.RELEASE</spring-messaging.version>
        <spring-orm.version>4.1.6.RELEASE</spring-orm.version>
        <spring-oxm.version>4.1.6.RELEASE</spring-oxm.version>
        <spring-test.version>4.1.6.RELEASE</spring-test.version>
        <spring-tx.version>4.1.6.RELEASE</spring-tx.version>
        <spring-webmvc.version>4.1.6.RELEASE</spring-webmvc.version>
        <spring-web.version>4.1.6.RELEASE</spring-web.version>
        <spring-webmvc-portlet.version>4.1.6.RELEASE</spring-webmvc-portlet.version>
        <spring-websocket.version>4.1.6.RELEASE</spring-websocket.version>
        <commons-logging.version>1.1.3</commons-logging.version>
        <asm.version>3.3.1</asm.version>
        <cglib.version>2.2.2</cglib.version>
        <javassist.version>3.17.1-GA</javassist.version>
        <mybatis-spring.version>1.2.3</mybatis-spring.version>
        <standard.version>1.1.2</standard.version>
    </properties>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>${junit.version}</version>
            </dependency>
            <!-- mybatis -->
            <dependency>
                <groupId>org.mybatis</groupId>
                <artifactId>mybatis</artifactId>
                <version>${mybatis.version}</version>
            </dependency>
            <!--mysql-->
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>${mysql.version}</version>
            </dependency>
            <!--jsp&servlet-->
            <dependency>
                <groupId>jstl</groupId>
                <artifactId>jstl</artifactId>
                <version>${jstl.version}</version>
            </dependency>
        <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
            <dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>javax.servlet-api</artifactId>
                <version>${servlet.version}</version>
                <scope>provided</scope>
            </dependency>
            <dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>jsp-api</artifactId>
                <version>${jsp.version}</version>
            </dependency>
            <!-- https://mvnrepository.com/artifact/log4j/log4j -->
            <dependency>
                <groupId>log4j</groupId>
                <artifactId>log4j</artifactId>
                <version>${log4j.version}</version>
            </dependency>
            <!-- Spring-->
            <!-- https://mvnrepository.com/artifact/org.springframework/spring-aop -->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-aop</artifactId>
                <version>${spring-aop.version}</version>
            </dependency>
            <!-- https://mvnrepository.com/artifact/org.springframework/spring-aspects -->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-aspects</artifactId>
                <version>${spring-aspects.version}</version>
            </dependency>
            <!-- https://mvnrepository.com/artifact/org.springframework/spring-beans -->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-beans</artifactId>
                <version>${spring-beans.version}</version>
            </dependency>
            <!-- https://mvnrepository.com/artifact/org.springframework/spring-context -->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-context</artifactId>
                <version>${spring-context.version}</version>
            </dependency>
            <!-- https://mvnrepository.com/artifact/org.springframework/spring-context-support -->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-context-support</artifactId>
                <version>${spring-context-support.version}</version>
            </dependency>
            <!-- https://mvnrepository.com/artifact/org.springframework/spring-core -->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-core</artifactId>
                <version>${spring-core.version}</version>
            </dependency>
            <!-- https://mvnrepository.com/artifact/org.springframework/spring-expression -->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-expression</artifactId>
                <version>${spring-expression.version}</version>
            </dependency>
            <!-- https://mvnrepository.com/artifact/org.springframework/spring-instrument -->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-instrument</artifactId>
                <version>${spring-instrument.version}</version>
            </dependency>
            <!-- https://mvnrepository.com/artifact/org.springframework/spring-instrument-tomcat -->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-instrument-tomcat</artifactId>
                <version>${spring-instrument-tomcat.version}</version>
            </dependency>
            <!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-jdbc</artifactId>
                <version>${spring-jdbc.version}</version>
            </dependency>
            <!-- https://mvnrepository.com/artifact/org.springframework/spring-jms -->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-jms</artifactId>
                <version>${spring-jms.version}</version>
            </dependency>
            <!-- https://mvnrepository.com/artifact/org.springframework/spring-messaging -->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-messaging</artifactId>
                <version>${spring-messaging.version}</version>
            </dependency>
            <!-- https://mvnrepository.com/artifact/org.springframework/spring-orm -->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-orm</artifactId>
                <version>${spring-orm.version}</version>
            </dependency>
            <!-- https://mvnrepository.com/artifact/org.springframework/spring-oxm -->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-oxm</artifactId>
                <version>${spring-oxm.version}</version>
            </dependency>
            <!-- https://mvnrepository.com/artifact/org.springframework/spring-test -->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-test</artifactId>
                <version>${spring-test.version}</version>
                <scope>test</scope>
            </dependency>
            <!-- https://mvnrepository.com/artifact/org.springframework/spring-tx -->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-tx</artifactId>
                <version>${spring-tx.version}</version>
            </dependency>
            <!-- https://mvnrepository.com/artifact/org.springframework/spring-web -->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-web</artifactId>
                <version>${spring-web.version}</version>
            </dependency>
            <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-webmvc</artifactId>
                <version>${spring-webmvc.version}</version>
            </dependency>
            <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc-portlet -->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-webmvc-portlet</artifactId>
                <version>${spring-webmvc-portlet.version}</version>
            </dependency>
            <!-- https://mvnrepository.com/artifact/org.springframework/spring-websocket -->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-websocket</artifactId>
                <version>${spring-websocket.version}</version>
            </dependency>
            <!-- 其他-->
            <!-- https://mvnrepository.com/artifact/commons-logging/commons-logging -->
            <dependency>
                <groupId>commons-logging</groupId>
                <artifactId>commons-logging</artifactId>
                <version>${commons-logging.version}</version>
            </dependency>
            <!-- https://mvnrepository.com/artifact/asm/asm -->
            <dependency>
                <groupId>asm</groupId>
                <artifactId>asm</artifactId>
                <version>${asm.version}</version>
            </dependency>
            <!-- https://mvnrepository.com/artifact/cglib/cglib -->
            <dependency>
                <groupId>cglib</groupId>
                <artifactId>cglib</artifactId>
                <version>${cglib.version}</version>
            </dependency>
            <!-- https://mvnrepository.com/artifact/org.javassist/javassist -->
            <dependency>
                <groupId>org.javassist</groupId>
                <artifactId>javassist</artifactId>
                <version>${javassist.version}</version>
            </dependency>
            <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring -->
            <dependency>
                <groupId>org.mybatis</groupId>
                <artifactId>mybatis-spring</artifactId>
                <version>${mybatis-spring.version}</version>
            </dependency>
        </dependencies>
    </dependencyManagement>
   <build>
       <resources>
           <resource>
               <directory>src/main/java</directory>
               <includes>
                   <include>**/*.xml</include>
               </includes>
           </resource>

           <resource>
               <directory>src/main/resouces</directory>
               <includes>
                   <include>**/*.xml</include>
                   <include>**/*.properties</include>
               </includes>
           </resource>
       </resources>
       <plugins>
           <plugin>
               <groupId>org.apache.tomcat.maven</groupId>
               <artifactId>tomcat7-maven-plugin</artifactId>
               <configuration>
                   <path>/</path>
                   <port>9090</port>
               </configuration>
           </plugin>
       </plugins>
   </build>
</project>

2 子项目引入父项目的JAR包

<?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">
    <parent>
        <artifactId>SpringProject</artifactId>
        <groupId>com.zxf</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>
    <artifactId>Spring-web1</artifactId>
    <packaging>war</packaging>
    <dependencies>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
    </dependency>
    <!-- mybatis -->
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis</artifactId>
    </dependency>
    <!--mysql-->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
    </dependency>
    <!--jsp&servlet-->
    <dependency>
        <groupId>jstl</groupId>
        <artifactId>jstl</artifactId>
        <scope>provided</scope>
    </dependency>
    <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>javax.servlet-api</artifactId>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>jsp-api</artifactId>
        <scope>provided</scope>
    </dependency>
    <!-- https://mvnrepository.com/artifact/log4j/log4j -->
    <dependency>
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
    </dependency>
        <!-- Spring-->
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-aop -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-aspects -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-beans -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-context -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-context-support -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context-support</artifactId>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-core -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-expression -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-expression</artifactId>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-instrument -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-instrument</artifactId>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-instrument-tomcat -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-instrument-tomcat</artifactId>
            <version>${spring-instrument-tomcat.version}</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-jms -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jms</artifactId>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-messaging -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-messaging</artifactId>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-orm -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-oxm -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-oxm</artifactId>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-test -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-tx -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-web -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc-portlet -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc-portlet</artifactId>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-websocket -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-websocket</artifactId>
        </dependency>
        <!-- 其他-->
        <!-- https://mvnrepository.com/artifact/commons-logging/commons-logging -->
        <dependency>
            <groupId>commons-logging</groupId>
            <artifactId>commons-logging</artifactId>
        </dependency>
        <!-- https://mvnrepository.com/artifact/asm/asm -->
        <dependency>
            <groupId>asm</groupId>
            <artifactId>asm</artifactId>
        </dependency>
        <!-- https://mvnrepository.com/artifact/cglib/cglib -->
        <dependency>
            <groupId>cglib</groupId>
            <artifactId>cglib</artifactId>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.javassist/javassist -->
        <dependency>
            <groupId>org.javassist</groupId>
            <artifactId>javassist</artifactId>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
        </dependency>
    </dependencies>
</project>

3 开始编写pojo层实体类

package com.zxf.web.pojo;

public class Flower {
    private  int id;
    private String name;
    private float price;
    private String production;

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public float getPrice() {
        return price;
    }

    public void setPrice(float price) {
        this.price = price;
    }

    public String getProduction() {
        return production;
    }

    public void setProduction(String production) {
        this.production = production;
    }
}

4 编写Mybatis的Mapper,这次使用的是注解方式。

package com.zxf.web.mapper;

import com.zxf.web.pojo.Flower;
import org.apache.ibatis.annotations.Select;

import java.util.List;

public interface FlowerMapper {
    @Select("select * from flower")
    List<Flower> getAll();
}

5 编写Service层，后面我们会把Service交给Spring容器来管理

package com.zxf.web.service;

import com.zxf.web.pojo.Flower;

import java.util.List;

public interface FlowerService {
    List<Flower> show();
}


package com.zxf.web.service.impl;

import com.zxf.web.mapper.FlowerMapper;
import com.zxf.web.pojo.Flower;
import com.zxf.web.service.FlowerService;

import java.util.List;

public class FlowerServiceImpl implements FlowerService {
    private FlowerMapper flowerMapper;

    public FlowerMapper getFlowerMapper() {
        return flowerMapper;
    }

    public void setFlowerMapper(FlowerMapper flowerMapper) {
        this.flowerMapper = flowerMapper;
    }

    public List<Flower> show() {
        return  flowerMapper.getAll();
    }
}

6 编写Spring配置文件，它负责加载Mybatis用到的资源和数据库连接

<?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">
    <!-- 数据源封装类 .数据源:获取数据库连接,spring-jdbc.jar中-->
    <bean id="dataSouce" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
        <property name="url" value="jdbc:mysql://192.168.0.148:3306/test"></property>
        <property name="username" value="root"></property>
        <property name="password" value="abc123"></property>
    </bean>
    <!-- 创建SqlSessionFactory对象 -->
    <bean id="factory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 数据库连接信息来源于dataSource -->
        <property name="dataSource" ref="dataSouce"></property>
    </bean>
    <!-- 扫描器相当于mybatis.xml中 mappers下package标签,扫描com.bjsxt.mapper包后会给对应接口创建对象-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!-- 要扫描哪个包 -->
        <property name="basePackage" value="com.zxf.web.mapper"></property>
        <!-- 和factory产生关系 -->
        <property name="sqlSessionFactory" ref="factory"></property>
    </bean>
    <!-- 由spring管理service实现类 -->
    <bean id="flowerSerivce" class="com.zxf.web.service.impl.FlowerServiceImpl">
        <property name="flowerMapper" ref="flowerMapper"></property>
    </bean>
</beans>

7 以上都编写好以后，我们先用junit来测试一下，各个资源资源直接是否正常

package com.zxf.web.test;

import com.zxf.web.pojo.Flower;
import com.zxf.web.service.impl.FlowerServiceImpl;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.util.List;

public class Test1 {
    @Test
    public void test1(){
        ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
        FlowerServiceImpl flowerService=ac.getBean("flowerSerivce",FlowerServiceImpl.class);
        List<Flower> show = flowerService.show();
        for(Flower f:show){
            System.out.println(f.getProduction());
        }

    }
}

在这里插入图片描述
8 编写Servlet类，也是采用注解的方式建立Servlet

package com.zxf.web.servlet;

import com.zxf.web.service.FlowerService;
import com.zxf.web.service.impl.FlowerServiceImpl;
import org.springframework.context.ApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;

import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebServlet("/flowerServlet")
public class FlowerServlet extends HttpServlet {
    private FlowerService flowerService;
    @Override
    public void init() throws ServletException {
        ApplicationContext ac= WebApplicationContextUtils.getRequiredWebApplicationContext(getServletContext());
        flowerService=ac.getBean("flowerSerivce", FlowerServiceImpl.class);
    }
    @Override
    public void service(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
        req.setAttribute("list",flowerService.show());
        req.getRequestDispatcher("showFlower.jsp").forward(req,res);
    }
}

9 这个时候我们用web.xml方式加载配置文件
web.xml文件内容

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
  <!-- 上下文参数 -->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath*:applicationContext.xml</param-value>
  </context-param>
  <!-- 封装了一个监听器,帮助加载Spring的配置文件-->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
</web-app>

这样我们在Servlet中就可以直接调用Spring中定义的标签的Service了
我们使用Maven的打包工具 把当前的web工程打WAR包
在这里插入图片描述
到这里把你的WAR包拷贝的tomcat中的webapps
在这里插入图片描述
最后在WEB层运行的结果
在这里插入图片描述
如果对你有帮助，请记得点个赞哦！！！！！！

猜你喜欢

转载自blog.csdn.net/zhang6132326/article/details/105242058
今日推荐
NetBSD 禁止提交由 AI 生成的代码
Apache Doris 2.0.10 版本正式发布！
开源日报 | 大模型开战；大模型独角兽被曝卖身；周鸿祎建议谷歌开源所有产品；最大开源AI社区提供1000万美元共享GPU
开源日报 | Chrome内置Gemini的意义不在于Gemini；中国AI追随之路的五大误区；ECharts创始人“下海”养鱼；谷歌I/O开发者大会什么都有，只是没有惊喜
微软回应中国区AI团队“打包赴美”传闻
基于大语言模型的开源知识库问答系统 MaxKB GitHub Star 数量突破 5,000 个！
周排行
女程序员是这样被恶搞的
B/S 和 C/S 的优缺点
vector一直申请会怎样？
座头鲸识别比赛(Humpback Whale Identification)总结
Linux高性能服务器编程——I/O复用 select
Mysql连接数据库（当包使用）
通过URI获取的文件路径为null的解决方法
1022-Primes on Interval(素数筛选+二分查找) ZCMU
Python出现： TypeError: expected string or buffer
bzoj2434: [Noi2011]阿狸的打字机 ac自动机+树状数组
每日归档
更多
2024-05-18(4)
2024-05-17(34)
2024-05-16(6)
2024-05-15(24)
2024-05-14(0)
2024-05-13(18)
2024-05-12(0)
2024-05-11(38)
2024-05-10(38)
2024-05-09(35)

代码天地 © 2018 codetd.com

境外服务器   最新电视剧2022