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maven+Spring+JdbcTemplate

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导读：本篇文章讲解 maven+Spring+JdbcTemplate，希望对大家有帮助，欢迎收藏，转发！站点地址：www.bmabk.com

目录

XML文件配置

Java代码配置

JdbcTemplate是类似org.apache.commons.dbutils.QueryRunner，用于操作数据库的模板，与QueryRunner一样，都需要配置DataSource

首先添加依赖：spring-context + spring-jdbc + druid + mysql-connector-java + junit（用于测试）

XML文件配置

pom.xml 配置文件

<?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>jdbcTemplate01</artifactId>
    <version>1.0-SNAPSHOT</version>
    
    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.3.18</version>
        </dependency>
<!--        jdbcTemplate-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.3.18</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.2.9</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.27</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13.2</version>
        </dependency>
    </dependencies>


</project>
package com.qfedu.demo.model;

/**
 * 模板类， 数据库jdbc01中的user表
 */
public class User {
    private Integer id, age;
    private String username, gender, hobby, address, grade;

    public Integer getId() {
        return id;
    }

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

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getGender() {
        return gender;
    }

    public void setGender(String gender) {
        this.gender = gender;
    }

    public String getHobby() {
        return hobby;
    }

    public void setHobby(String hobby) {
        this.hobby = hobby;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public String getGrade() {
        return grade;
    }

    public void setGrade(String grade) {
        this.grade = grade;
    }

    @Override
    public String toString() {
        return "User{" +
                "id=" + id +
                ", age=" + age +
                ", username='" + username + '\'' +
                ", gender='" + gender + '\'' +
                ", hobby='" + hobby + '\'' +
                ", address='" + address + '\'' +
                ", grade='" + grade + '\'' +
                '}';
    }
}

package com.qfedu.demo.dao;

import com.qfedu.demo.model.User;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;

import java.util.List;

/**
 * 操作类，用于操作数据库
 */
public class UserDao {
    private JdbcTemplate jdbcTemplate;

    //用于在applicationContext.xml配置
    public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {
        this.jdbcTemplate = jdbcTemplate;
    }

    //添加数据
    public Integer addUser(User user) {
        return jdbcTemplate.update("insert into user(username,gender,age,address,grade,hobby) values (?,?,?,?,?,?)", user.getUsername(), user.getGender(), user.getAge(), user.getAddress(), user.getGrade(), user.getHobby());
    }

    //删除数据
    public Integer deleteById(Integer id) {
        return jdbcTemplate.update("delete from user where id=?", id);
    }
    

    //根据id查找数据
    public User getUserById(Integer id) {
        return jdbcTemplate.queryForObject("select * from user where id=?", new BeanPropertyRowMapper<>(User.class), id);
    }

    //获取所有数据
    public List<User> getAllUser() {
        return jdbcTemplate.query("select * from user", new BeanPropertyRowMapper<>(User.class));
    }

}

package com.qfedu.demo.dao;

import com.qfedu.demo.model.User;
import org.junit.Before;
import org.junit.Test;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.util.List;

/**
 * 测试类
 */
public class UserDaoTest01 {
    ClassPathXmlApplicationContext ctx = null;
    UserDao userDao = null;

    //每个Test执行前执行改方法
    @Before
    public void before() {
        ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
        userDao = ctx.getBean(UserDao.class);
    }

    //测试添加数据
    @Test
    public void Test01() {
        User user = new User();
        user.setUsername("lisi");
        user.setGender("男");
        user.setAge(22);
        user.setAddress("广州");
        user.setGrade("本科");
        user.setHobby("玩");
        Integer effRow = userDao.addUser(user);
        System.out.println("effRow = " + effRow);
    }

    //测试删除数据
    @Test
    public void Test02() {
        Integer effRow = userDao.deleteById(11);
        System.out.println("effRow = " + effRow);
    }

    //测试根据id获取数据
    @Test
    public void Test03() {
        User user = userDao.getUserById(10);
        System.out.println("user = " + user);
    }

    //获取所有数据
    @Test
    public void Test04() {
        List<User> users = userDao.getAllUser();
        for (User user : users) {
            System.out.println("user = " + user);
        }
    }

}

appliactionContext.xml配置文件

<?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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">

    <context:property-placeholder location="db.properties"/>
    <!--配置数据源-->
    <bean class="com.alibaba.druid.pool.DruidDataSource" id="dataSource">
        <property name="url" value="${db.url}"/>
        <property name="username" value="${db.username}"/>
        <property name="password" value="${db.password}"/>
    </bean>
    <!--    <bean class="com.alibaba.druid.pool.DruidDataSource" id="dataSource">-->
    <!--        <property name="url" value="jdbc:mysql:///jdbc01"/>-->
    <!--        <property name="username" value="root"/>-->
    <!--        <property name="password" value="123456"/>-->
    <!--    </bean>-->
    <!--配置jdbcTemplate，相当于设置QueryRunner-->
    <bean class="org.springframework.jdbc.core.JdbcTemplate" id="jdbcTemplate">
        <property name="dataSource" ref="dataSource"/>
    </bean>
    <!-- 配置com.qfedu.demo.dao.UserDao.jdbcTemplate -->
    <bean class="com.qfedu.demo.dao.UserDao" id="userDao">
        <property name="jdbcTemplate" ref="jdbcTemplate"/>
    </bean>
</beans>

Java代码配置

操作类

package com.qfedu.demo01;

import com.qfedu.demo.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Repository;

import java.util.List;

/**
 * 操作类，用于操作数据库
 * 
 * xml配置时，将UserDao注入spring容器
 * <bean class="com.qfedu.demo.UserDao" id="userDao">
 * <property name="jdbcTemplate" ref="jdbcTemplate"/>
 * </bean>
 */
//注入spring容器
@Repository
public class UserDao {
    @Autowired
    private JdbcTemplate jdbcTemplate;

    //获取所有数据
    public List<User> getAllUser() {
        return jdbcTemplate.query("select * from user", new BeanPropertyRowMapper<>(User.class));
    }

}

Java代码配置类

package com.qfedu.demo01;

import com.alibaba.druid.pool.DruidDataSource;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.jdbc.core.JdbcTemplate;

import javax.sql.DataSource;

/**
 * 配置类
 */

@Configuration  //声明该类是配置类
@ComponentScan  //包扫描，默认扫描本类所在包，@ComponentScan(basePackages = "com.qfedu.demo01")
public class JavaConfig {

    /**
     * 配置DataSource
     * <bean class="com.alibaba.druid.pool.DruidDataSource" id="dataSource">
     * <property name="url" value="${db.url}"/>
     * <property name="username" value="${db.username}"/>
     * <property name="password" value="${db.password}"/>
     * </bean>
     */
    //注册到spring
    @Bean
    DataSource dataSource() {
        DruidDataSource ds = new DruidDataSource();
        ds.setUrl("jdbc:mysql:///jdbc01");
        ds.setUsername("root");
        ds.setPassword("123456");
        return ds;
    }

    /**
     * 配置JdbcTemplate
     * <bean class="org.springframework.jdbc.core.JdbcTemplate" id="jdbcTemplate">
     * <property name="dataSource" ref="dataSource"/>
     * </bean>
     */
    @Bean
    JdbcTemplate jdbcTemplate() {
        JdbcTemplate jdbcTemplate = new JdbcTemplate();
        jdbcTemplate.setDataSource(dataSource());
        return jdbcTemplate;
    }
}

测试类

package com.qfedu.demo01;

import com.qfedu.demo.User;
import org.junit.Before;
import org.junit.Test;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;

import java.util.List;

/**
 * 测试类
 */
public class JavaConfigTest01 {
    private AnnotationConfigApplicationContext ctx = null;
    private UserDao userDao = null;

    @Before
    public void before() {
        ctx = new AnnotationConfigApplicationContext(JavaConfig.class);
        userDao = ctx.getBean(UserDao.class);
    }

    @Test
    public void getAllUser() {
        List<User> users = userDao.getAllUser();
        for (User user : users) {
            System.out.println("user = " + user);
        }
    }
}

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