Create spring datasource in code not in xml (用程式創建spring的data source, 而非xml的方法)

1. DatasourceCreateDemo.java

import javax.sql.DataSource;

import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.datasource.DriverManagerDataSource;


public class DatasourceCreateDemo {
    
    public static void main(String[] args){
    
        new Tester().testJdbcTemplate();
        
    }
}

class DataSourceFactory {
    
     public DataSource createDataSource() {
        DriverManagerDataSource dataSource = new DriverManagerDataSource();
        dataSource.setDriverClassName("driver.class.name");
        dataSource.setUrl("sqlurl");
        dataSource.setUsername("username");
        dataSource.setPassword("password");
        return dataSource;
     }
    
}

class Tester{
    private JdbcTemplate jdbcTemplateObject;
    
    public void setDataSource(DataSource dataSource) {
        this.jdbcTemplateObject = new JdbcTemplate(dataSource);
    }
    
    public void testJdbcTemplate(){
        System.out.println(jdbcTemplateObject==null);
    }
}

2. spring config

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    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-2.0.xsd">

   <bean id = "dataSourceFactory" class = "xxx.xxx.DataSourceFactory" />    
   
   <bean id = "dataSource" factory-bean = "dataSourceFactory" factory-method = "createDataSource" />
   
   <bean id="Tester" 
      class="xxx.xxx.Tester">
      <property name="dataSource"  ref="dataSource" />    
   </bean>
   
</beans>