javaee spring jdbcTemplate的使用

依赖

<?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>testspring02</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>war</packaging>

  <name>testspring02 Maven Webapp</name>
  <!-- FIXME change it to the project's website -->
  <url>http://www.example.com</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.7</maven.compiler.source>
    <maven.compiler.target>1.7</maven.compiler.target>
  </properties>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>test</scope>
    </dependency>

    <!-- 导入spring的核心jar包 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>4.3.18.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-beans</artifactId>
      <version>4.3.18.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>4.3.18.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context-support</artifactId>
      <version>4.3.18.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-expression</artifactId>
      <version>4.3.18.RELEASE</version>
    </dependency>

    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.37</version>
    </dependency>
    <dependency>
      <groupId>com.mchange</groupId>
      <artifactId>c3p0</artifactId>
      <version>0.9.5.2</version>
    </dependency>
    <!-- 配置的 spring-jdbc -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>4.3.18.RELEASE</version>
    </dependency>

  </dependencies>

  <build>
    <finalName>testspring02</finalName>
    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
      <plugins>
        <plugin>
          <artifactId>maven-clean-plugin</artifactId>
          <version>3.1.0</version>
        </plugin>
        <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
        <plugin>
          <artifactId>maven-resources-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>3.8.0</version>
        </plugin>
        <plugin>
          <artifactId>maven-surefire-plugin</artifactId>
          <version>2.22.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-war-plugin</artifactId>
          <version>3.2.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-install-plugin</artifactId>
          <version>2.5.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-deploy-plugin</artifactId>
          <version>2.8.2</version>
        </plugin>
      </plugins>
    </pluginManagement>
  </build>
</project>

测试类

package com.test.springJdbc;

import com.mchange.v2.c3p0.ComboPooledDataSource;
import org.junit.Test;
import org.springframework.jdbc.core.JdbcTemplate;

import java.beans.PropertyVetoException;

/**
 * @description:
 * @projectName:testspring2
 * @see:com.test.springJdbc
 * @author:123
 * @createTime:2023/8/28 19:33
 */
public class TestJdbcTemplate {
    @Test
    public void test()
    {
        //1.创建一个连接池

        ComboPooledDataSource pooledDataSource=new ComboPooledDataSource();
        try {
            pooledDataSource.setDriverClass("com.mysql.jdbc.Driver");

            pooledDataSource.setJdbcUrl("jdbc:mysql://localhost:3306/itstar");

            pooledDataSource.setUser("itstar");

            pooledDataSource.setPassword("yyy123456");

            //2.创建JdbcTemplate对象
            JdbcTemplate jdbcTemplate=new JdbcTemplate(pooledDataSource);

            //3.执行sql
            String sql="insert into user values(null,?,?)";

            jdbcTemplate.update(sql,"daimenglaoshi","123");


        } catch (PropertyVetoException e) {
            e.printStackTrace();
        }






    }
}

用spring管理jdbc相关类

spring配置文件

<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 http://www.springframework.org/schema/context/spring-context.xsd">

    
    <context:component-scan base-package="com.test" />

    
    <context:property-placeholder location="db.properties" />

    
    <bean id="comboPooledDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="${driverClass}" />
        <property name="jdbcUrl" value="${jdbcUrl}" />
        <property name="user" value="${user}" />
        <property name="password" value="${password}" />
    bean>
    
    <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
        <constructor-arg name="dataSource" ref="comboPooledDataSource" />
    bean>

beans>

测试类

package com.test.dao.impl;

import com.test.dao.IUsersDao;
import com.test.pojo.Users;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Component;

/**
 * @description:
 * @projectName:testspring2
 * @see:com.test.dao.impl
 * @author:杨钧博
 * @createTime:2023/8/28 21:56
 */
@Component
public class UsersDao implements IUsersDao {

    //注入jdbcTemplate对象
    @Autowired
    private JdbcTemplate jdbcTemplate;

    @Override
    public void add(Users user) {
        String sql = "insert into users values(null,?,?)";

        jdbcTemplate.update(sql, user.getName(), user.getPassword());
    }
}

package com.test.springJdbc;

import com.test.dao.IUsersDao;
import com.test.pojo.Users;
import org.junit.Test;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.util.List;

public class TestUsersDao {

    @Test
    public void test()
    {
        ClassPathXmlApplicationContext applicationContext=new ClassPathXmlApplicationContext("applicationContext.xml");

        IUsersDao usersDao=  applicationContext.getBean("usersDao",IUsersDao.class);

        Users user=new Users("xiaowanglaoshi","123");

        usersDao.add(user);
    }



}