JdbcTemplate的使用
作者：互联网
在Spring 中可以使用 JdbcTemplate 进行数据库的管理操作。
Spring框架对JDBC 进行独立封装。很方便。
JdbcTemplate 的使用
导入依赖包
<?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>org.example</groupId>
<artifactId>Spring</artifactId>
<packaging>pom</packaging>
<version>1.0-SNAPSHOT</version>
<modules>
<module>SpringDemo1</module>
<module>springDemo2</module>
<module>springDemo3</module>
<module>springDemo4</module>
<module>springDemo5</module>
<module>springDemo6</module>
<module>springDemo7</module>
<module>springDemo8</module>
<module>springDemo9</module>
<module>springAop</module>
<module>springaop2</module>
<module>springAop3</module>
<module>springAop4</module>
<module>jdbc_Template</module>
</modules>
<properties>
<maven.compiler.source>8</maven.compiler.source>
<maven.compiler.target>8</maven.compiler.target>
</properties>
<dependencies>
<dependency>
<groupId>dom4j</groupId>
<artifactId>dom4j</artifactId>
<version>1.6.1</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.12</version>
</dependency>
<!-- Spring的依赖包-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>5.2.13.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>5.2.13.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.2.13.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-expression</artifactId>
<version>5.2.13.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>5.2.6.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.2.13.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>5.2.13.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>5.2.6.RELEASE</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.9.5</version>
</dependency>
<!-- mysql的依赖包-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.47</version>
</dependency>
<dependency>
<groupId>commons-dbutils</groupId>
<artifactId>commons-dbutils</artifactId>
<version>1.6</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>5.2.6.RELEASE</version>
</dependency>
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.5.2</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.20</version>
</dependency>
<dependency>
<groupId>cglib</groupId>
<artifactId>cglib</artifactId>
<version>3.3.0</version>
</dependency>
<dependency>
<groupId>org.ow2.asm</groupId>
<artifactId>asm</artifactId>
<version>9.1</version>
</dependency>
</dependencies>
</project>
配置jdbc 的文件 jdbc.properties
在Spring配置文件中 配置 数据库的连接池
配置 JdbcTemplate 对象，注入数据源
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
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
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<context:component-scan base-package="com.momo.dao,com.momo.service"/>
<!-- 导入外部的配置文件-->
<context:property-placeholder location="classpath:jdbc.properties"/>
<!--配置连接池-->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" destroy-method="close">
<property name="driverClassName" value="${jdbc.driver}"/>
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
</bean>
<!-- 配置 JdbcTemplate 对象，注入数据源-->
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="dataSource"/>
</bean>
</beans>
实体类
package com.momo.entity;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data
@AllArgsConstructor
@NoArgsConstructor
public class User {
private int id;
private String name;
private String pwd;
}
dao层：
package com.momo.dao;
import com.momo.entity.User;
import javax.rmi.CORBA.Stub;
import java.util.List;
public interface UserDao {
boolean save(User user);
List<User> findAll();
// 批量的增加
public void bathAdd(List<Object[]> users);
}
package com.momo.dao.impl;
import com.momo.dao.UserDao;
import com.momo.entity.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Repository;
import java.util.List;
@Repository
public class UserDaoImpl implements UserDao {
@Autowired
@Qualifier("jdbcTemplate")
private JdbcTemplate jdbcTemplate;
@Override
public boolean save(User user) {
String sql = "insert into user(name,pwd) values(?,?)";
// 增 删 改
int i = jdbcTemplate.update(sql, user.getName(), user.getPwd());
return i>0;
}
@Override
public List<User> findAll() {
String sql = "select * from user";
System.out.println("=====>"+jdbcTemplate);
// 只能做查询
List<User> query = jdbcTemplate.query(sql, new BeanPropertyRowMapper<User>(User.class));
return query;
}
@Override
public void bathAdd(List<Object[]> users) {
String sql = "insert into user(name,pwd) values(?,?)";
// 批量的增删改
int[] ints = jdbcTemplate.batchUpdate(sql, users);
System.out.println("=====>"+ints.length);
}
}
service层
package com.momo.service;
import com.momo.entity.User;
import java.util.List;
public interface UserService {
boolean save(User user);
List<User> findAll();
public void bathAdd(List<Object[]> users);
}
package com.momo.service.impl;
import com.momo.dao.UserDao;
import com.momo.entity.User;
import com.momo.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service("userService")
public class UserServiceImpl implements UserService {
@Autowired
private UserDao userDao;
@Override
public boolean save(User user) {
return userDao.save(user);
}
@Override
public List<User> findAll() {
return userDao.findAll();
}
@Override
public void bathAdd(List<Object[]> users) {
userDao.bathAdd(users);
}
}
测试
package com.momo.test;
import com.momo.entity.User;
import com.momo.service.UserService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.omg.PortableServer.LIFESPAN_POLICY_ID;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import java.util.ArrayList;
import java.util.List;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = {"classpath:springContext.xml"})
public class MyTest {
@Autowired
private UserService userService;
@Test
public void test(){
System.out.println("=====>"+userService);
List<User> all = userService.findAll();
all.forEach(System.out::println);
}
@Test
public void Test(){
boolean flag = userService.save(new User(0, "王五", "123321"));
System.out.println(flag);
}
@Test
public void bathTest(){
List<Object[]> list = new ArrayList<>();
Object[] o1 = {"张三","123456"};
Object[] o2 = {"李四","123456"};
Object[] o3 = {"王五","123456"};
list.add(o1);
list.add(o2);
list.add(o3);
userService.bathAdd(list);
}
}
标签：使用,List,springframework,JdbcTemplate,org,import,com,public 来源： https://blog.csdn.net/m0_46569959/article/details/122768385