Spring配置步驟總結！！！

文章目錄

導入Maven依賴包

 <dependencies>
        <!--測試包-->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>
        <!--MySql 數據庫包-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.18</version>
        </dependency>
        <!--Mybatis包-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.2</version>
        </dependency>
        <!--Spring必備包-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.2.0.RELEASE</version>
        </dependency>
        <!--spring操作數據庫的話，還需要一個spring-jdbc-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.2.0.RELEASE</version>
        </dependency>
        <!--實現AOP包-->
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.8.13</version>
        </dependency>
        <!--mybatis-spring包-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.3</version>
        </dependency>
    </dependencies>
    <!--在build中配置resources，來防止我們資源導出失敗的問題-->
    <build>
        <resources>
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
            </resource>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>true</filtering>
            </resource>
        </resources>
    </build>```

創建實體類 com.kuang.pojo.User

package com.kuang.pojo;

public class User {
    private int id;
    private String name;
    private String pwd;

    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 String getPwd() {
        return pwd;
    }

    public void setPwd(String pwd) {
        this.pwd = pwd;
    }

    public User(int id, String name, String pwd) {
        this.id = id;
        this.name = name;
        this.pwd = pwd;
    }

    public User() {
    }
     @Override
    public String toString() {
        return "User{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", pwd='" + pwd + '\'' +
                '}';
    }
}

創建功能接口 com.kuang.mapper.UserMapper.java

package com.kuang.mapper;

import com.kuang.pojo.User;

import java.util.List;

public interface UserMapper {
    public List<User> selectUser();

    //添加一個用戶
    public int addUser(User user);

    //刪除一個用戶
    public int deleteUser(int id);
}

創建實現接口的xml文件

注意：這裏如果路徑不同記得更改namespace

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.kuang.mapper.UserMapper">

    <select id="selectUser" resultType="user">
        select * from mybatis.user;
    </select>

    <insert id="addUser" parameterType="user">
        insert into mybatis.user (id, name, pwd) values (#{id},#{name},#{pwd});
    </insert>

    <delete id="deleteUser" parameterType="int">
        delete from mybatis.user where id=#{id};
    </delete>

</mapper>

創建UserMapper的實現類 UserMapperImpl.java

package com.kuang.mapper;

import com.kuang.pojo.User;
import org.mybatis.spring.SqlSessionTemplate;

import java.util.List;

public class UserMapperImpl implements UserMapper{

    //我們的所有操作，都使用sqlSession來執行，在原來，現在都使用SqlSessionTemplate；
    private SqlSessionTemplate sqlSession;

    public void setSqlSession(SqlSessionTemplate sqlSession) {
        this.sqlSession = sqlSession;
    }

    @Override
    public List<User> selectUser() {
        UserMapper mapper = sqlSession.getMapper(UserMapper.class);
        return mapper.selectUser();
    }

    @Override
    public int addUser(User user) {
        UserMapper mapper = sqlSession.getMapper(UserMapper.class);
        return mapper.addUser(user);
    }

    @Override
    public int deleteUser(int id) {
        UserMapper mapper = sqlSession.getMapper(UserMapper.class);
        return mapper.deleteUser(id);
    }
}

創建mybatis 核心配置文件 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核心配置文件-->
<configuration>
    <!--給pojo中的實體類起別名-->
    <typeAliases>
        <package name="com.kuang.pojo"/>
    </typeAliases>
</configuration>

創建Spring的核心配置文件（用於實現控制翻轉到IOC容器和實現DI依賴注入）spring-dao.xml

<?xml version="1.0" encoding="UTF-8"?>
<!--suppress ALL -->
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       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/tx
        http://www.springframework.org/schema/tx/spring-tx.xsd
         http://www.springframework.org/schema/aop
         https://www.springframework.org/schema/aop/spring-aop.xsd">


    <!--DataSource：使用Spring的數據源替換Mybatis的配置 c3p0 dhcp druid
    我們這裏使用Spring提供的JDBC：org.springframework.jdbc.datasource.DriverManagerDataSource
    -->
    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.cj.jdbc.Driver"/>
        <property name="url" value="jdbc:mysql://localhost:3306/mybatis?useSSL=true&amp;useUnicode=true&amp;characterEncoding=utf8"/>
        <property name="username" value="root"/>
        <property name="password" value="root"/>
    </bean>

    <!--sqlSessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!--綁定Mybatis配置文件-->
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
        <!--綁定映射文件-->
        <property name="mapperLocations" value="classpath:com/kuang/mapper/*.xml"/>
    </bean>

    <!--SqlSessionTemplate：就是我們使用的sqlSession-->
    <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
        <!--只能使用構造器注入sqlSessionFactory:因爲沒有set方法-->
        <constructor-arg index="0" ref="sqlSessionFactory"/>
    </bean>

    <!--配置聲明式事務-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!--結合AOP實現事務的織入-->
    <!--配置事務通知-->
    <tx:advice id="txadvice" transaction-manager="transactionManager">
        <!--給哪些方法配置事務-->
        <!--配置事務的傳播特性：new propagation= -->
        <tx:attributes>
            <tx:method name="add" propagation="REQUIRED"/>
            <tx:method name="delete"/>
            <tx:method name="update"/>
            <tx:method name="query" read-only="true"/><!--只讀-->
            <tx:method name="*"/>
        </tx:attributes>
    </tx:advice>

    <!--配置事務切入-->
    <aop:config>
        <aop:pointcut id="txPointCut" expression="execution(* com.kuang.mapper.*.*(..))"/>
        <aop:advisor advice-ref="txadvice" pointcut-ref="txPointCut"/>
    </aop:config>
    </beans>

創建Spring合併配置文件 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="spring-dao.xml"/>

    <!--將實現類導入IOC容器-->
    <bean id="userMapper" class="com.kuang.mapper.UserMapperImpl">
        <property name="sqlSession" ref="sqlSession"/>
    </bean>
</beans>

最後我們進行簡單的測試 MyTest.java


import com.kuang.mapper.UserMapper;
import com.kuang.pojo.User;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.io.IOException;

public class MyTest {
    @Test
    public void test() throws IOException {

        ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
         /*參數如果是一個接口實現類，第二個參數要是它的接口類對象*/
        UserMapper userMapper = context.getBean("userMapper", UserMapper.class);
        for (User user : userMapper.selectUser()){
            System.out.println(user);
        }
    }
}

Spring配置步驟總結！！！

文章目錄

導入Maven依賴包

創建實體類 com.kuang.pojo.User

創建功能接口 com.kuang.mapper.UserMapper.java

創建實現接口的xml文件

創建UserMapper的實現類 UserMapperImpl.java

創建mybatis 核心配置文件 mybatis-config.xml

創建Spring的核心配置文件（用於實現控制翻轉到IOC容器和實現DI依賴注入）spring-dao.xml

創建Spring合併配置文件 applicationContext.xml

最後我們進行簡單的測試 MyTest.java

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Spring配置步驟總結！！！

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