1.类的加载过程----了解
![](https://img2020.cnblogs.com/blog/1460404/202006/1460404-20200617073626781-606002555.png)
2.类的加载器的作用
![](https://img2020.cnblogs.com/blog/1460404/202006/1460404-20200617073631735-1952650449.png)
3.类的加载器的分类
![](https://img2020.cnblogs.com/blog/1460404/202006/1460404-20200617073636744-890324179.png)
4.Java类编译、运行的执行的流程
![](https://img2020.cnblogs.com/blog/1460404/202006/1460404-20200617073641738-489860472.png)
5.使用Classloader加载src目录下的配置文件
@Test
public void test2() throws Exception {
Properties pros = new Properties();
//此时的文件默认在当前的module下。
//读取配置文件的方式一:
// FileInputStream fis = new FileInputStream("jdbc.properties");
// FileInputStream fis = new FileInputStream("src\\jdbc1.properties");
// pros.load(fis);
//读取配置文件的方式二:使用ClassLoader
//配置文件默认识别为:当前module的src下
ClassLoader classLoader = ClassLoaderTest.class.getClassLoader();
InputStream is = classLoader.getResourceAsStream("jdbc1.properties");
pros.load(is);
String user = pros.getProperty("user");
String password = pros.getProperty("password");
System.out.println("user = " + user + ",password = " + password);
}