抽取数据库配置 到properties文件 配置代码解耦合
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@ -4,29 +4,55 @@ import com.alibaba.druid.pool.DruidDataSource;
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import com.alibaba.druid.pool.DruidPooledConnection;
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import com.alibaba.druid.pool.DruidPooledConnection;
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import com.mchange.v2.c3p0.ComboPooledDataSource;
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import com.mchange.v2.c3p0.ComboPooledDataSource;
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import com.sec.dao.UserDao;
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import com.sec.dao.UserDao;
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import org.springframework.context.annotation.AnnotationConfigApplicationContext;
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import org.springframework.context.support.ClassPathXmlApplicationContext;
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import org.springframework.context.support.ClassPathXmlApplicationContext;
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import org.springframework.context.support.FileSystemXmlApplicationContext;
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import java.beans.PropertyVetoException;
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import java.beans.PropertyVetoException;
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import java.sql.*;
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import java.sql.*;
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import java.util.ResourceBundle;
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//TIP To <b>Run</b> code, press <shortcut actionId="Run"/> or
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//TIP To <b>Run</b> code, press <shortcut actionId="Run"/> or
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// click the <icon src="AllIcons.Actions.Execute"/> icon in the gutter.
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// click the <icon src="AllIcons.Actions.Execute"/> icon in the gutter.
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public class Main {
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public class Main {
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static String driver = "com.mysql.jdbc.Driver";
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static String driver = "";
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static String url = "jdbc:mysql://47.103.155.22:3306/learn_spring";
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static String url = "";
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static String user = "root";
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static String user = "";
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static String password = "mysql_wafeYX";
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static String password = "";
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public static void main(String[] args) {
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// ApplicationContext application=new ClassPathXmlApplicationContext("application.xml");
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public static void main(String[] args) {
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Main.getSpring();
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Main.getSetting();
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Main.getDruid();
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Main.getC3p0();
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}
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//spring api
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//1.ClassPathXmlApplicationContext 读取根目录下的配置文件
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//2.FileSystemXmlApplicationContext 读取xml下的配置文件
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//3.AnnotationConfigApplicationContext 读取注解文件
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public static void getSpring(){
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// ApplicationContext application=new ClassPathXmlApplicationContext("application.xml");
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ClassPathXmlApplicationContext application=new ClassPathXmlApplicationContext("application.xml");
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ClassPathXmlApplicationContext application=new ClassPathXmlApplicationContext("application.xml");
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UserDao userDao1 = (UserDao)application.getBean("UserDao");
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UserDao userDao1 = (UserDao)application.getBean("UserDao");
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// UserDao userDao2 = (UserDao)application.getBean("UserDao");
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// UserDao userDao2 = (UserDao)application.getBean("UserDao");
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System.out.println(userDao1);
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System.out.println(userDao1);
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application.close();
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application.close();
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// System.out.println(userDao2);
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// System.out.println(userDao2);
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// userDao.getData();
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// userDao.getData();
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}
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//读取properties文件 对数据库连接信息进行设置
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//目的是为了将配置信息与代码进行解耦
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public static void getSetting(){
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ResourceBundle rb = ResourceBundle.getBundle("jdbc");
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driver=rb.getString("jdbc.driver");
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url=rb.getString("jdbc.url");
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user=rb.getString("jdbc.user");
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password=rb.getString("jdbc.password");
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}
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public static void getDruid(){
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DruidDataSource druidDataSource=new DruidDataSource();
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DruidDataSource druidDataSource=new DruidDataSource();
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druidDataSource.setDriverClassName(driver);
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druidDataSource.setDriverClassName(driver);
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druidDataSource.setUrl(url);
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druidDataSource.setUrl(url);
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@ -39,7 +65,6 @@ public class Main {
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ResultSet resultSet = preparedStatement.executeQuery();
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ResultSet resultSet = preparedStatement.executeQuery();
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while (resultSet.next()) {
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while (resultSet.next()) {
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System.out.println(resultSet.getString("user_name")+" "+resultSet.getString("account_name"));
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System.out.println(resultSet.getString("user_name")+" "+resultSet.getString("account_name"));
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// System.out.println(resultSet.getString("account_name"));
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}
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}
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resultSet.close();
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resultSet.close();
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preparedStatement.close();
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preparedStatement.close();
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@ -47,6 +72,9 @@ public class Main {
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} catch (SQLException e) {
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} catch (SQLException e) {
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throw new RuntimeException(e);
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throw new RuntimeException(e);
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}
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}
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}
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public static void getC3p0(){
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ComboPooledDataSource comboPooledDataSource=new ComboPooledDataSource();
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ComboPooledDataSource comboPooledDataSource=new ComboPooledDataSource();
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try {
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try {
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comboPooledDataSource.setDriverClass(driver);
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comboPooledDataSource.setDriverClass(driver);
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@ -65,8 +93,5 @@ public class Main {
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} catch (PropertyVetoException | SQLException e) {
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} catch (PropertyVetoException | SQLException e) {
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throw new RuntimeException(e);
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throw new RuntimeException(e);
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}
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}
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}
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}
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}
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}
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4
springLearn202503/src/main/resources/jdbc.properties
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4
springLearn202503/src/main/resources/jdbc.properties
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@ -0,0 +1,4 @@
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jdbc.driver=com.mysql.jdbc.Driver
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jdbc.url=jdbc:mysql://47.103.155.22:3306/learn_spring
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jdbc.user=root
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jdbc.password=mysql_wafeYX
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