使用spring-jdbc完成最简单的数据库操作

野性酷女 2023-07-22 05:58 10阅读 0赞

1 表关系  
![在这里插入图片描述][2020040420162155.png]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poYW5nNjEzMjMyNg_size_16_color_FFFFFF_t_70]  
2 使用Maven方式创建工程  
pom.xml文件JAR包的坐标

<?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>Spring_tx2</artifactId>
        <version>1.0-SNAPSHOT</version>
        <dependencies>
            
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-context</artifactId>
                <version>5.0.2.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>commons-logging</groupId>
                <artifactId>commons-logging</artifactId>
                <version>1.2</version>
            </dependency>
            <dependency>
                <groupId>log4j</groupId>
                <artifactId>log4j</artifactId>
                <version>1.2.12</version>
            </dependency>
            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>4.12</version>
                <scope>test</scope>
            </dependency>
            
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>druid</artifactId>
                <version>1.1.10</version>
            </dependency>
            
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>5.1.6</version>
            </dependency>
            
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-test</artifactId>
                <version>5.0.2.RELEASE</version>
                <scope>test</scope>
            </dependency>
            
            <dependency>
                <groupId>aopalliance</groupId>
                <artifactId>aopalliance</artifactId>
                <version>1.0</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-aspects</artifactId>
                <version>5.0.2.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>org.aspectj</groupId>
                <artifactId>aspectjweaver</artifactId>
                <version>1.8.3</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-jdbc</artifactId>
                <version>5.0.2.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-tx</artifactId>
                <version>5.0.2.RELEASE</version>
            </dependency>
        </dependencies>
    </project>

3 Spring的核心配置文件  
applicationContext\_jdbc.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:aop="http://www.springframework.org/schema/aop"
           xsi:schemaLocation=" http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
     
        <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
            <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
            <property name="url" value="jdbc:mysql://192.168.0.148:3306/test"/>
            <property name="username" value="root"/>
            <property name="password" value="abc123"/>
        </bean>
    
        <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
            <property name="dataSource" ref="dataSource"/>
        </bean>
    </beans>

4 编写测试类；通过注解方式导入spring配置文件

package com.test;
    
    import org.junit.Test;
    import org.junit.runner.RunWith;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.jdbc.core.JdbcTemplate;
    import org.springframework.test.context.ContextConfiguration;
    import org.springframework.test.context.junit4.SpringJUnit4ClassRunner; @RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration(value = "classpath:applicationContext_jdbc.xml") public class MyTest1 { 
        @Autowired
        private JdbcTemplate jdbcTemplate; @Test public void test1(){ 
            for(int i=0;i<10;i++) { 
                jdbcTemplate.update("insert into t1(tname) values('可以写入数据了')");
            }
        }
      @Test public void test2(){ 
            jdbcTemplate.update("update t1 set tname='我玩你看' where tid=5");
        }
        @Test public void test3(){ 
            jdbcTemplate.update("delete from t1 where tid=6 ");
        }
        @Test public void test4(){ 
            T1 t1 = jdbcTemplate.queryForObject("select * from t1 where tid=?", new BeanMapper(),10);
            System.out.println(t1.getTname());
        }
        @Test public void test5(){ 
            List<T1> query = jdbcTemplate.query("select * from t1 ", new BeanMapper()); for(T1 t1:query){ 
                System.out.println(t1.getTname());
            }
        }
    }

package com.zxf.pojo;
    
    import org.springframework.jdbc.core.RowMapper;
    
    import java.sql.ResultSet;
    import java.sql.SQLException;
    
    public class BeanMapper implements RowMapper<T1> { 
        public T1 mapRow(ResultSet resultSet, int i) throws SQLException { 
            T1 t=new T1();
            t.setTid(resultSet.getInt("tid"));
            t.setTname(resultSet.getString("tname"));
            return t;
        }
    }

[2020040420162155.png]: /images/20230528/dfeaae5410ca434fb7a33d9044664b1d.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poYW5nNjEzMjMyNg_size_16_color_FFFFFF_t_70]: /images/20230528/9ba4d1ef532e44739559acfb288bb681.png