package test;
public class A {}

package test;

public class Main {
    public static void println(Class clazz) {
        System.out.println("=====" + clazz.getName() + "=====");
        try {
            System.out.println("1 " + clazz.getResource(""));
        } catch (Exception e) {
            System.out.println("1 error " + e.getMessage());
        }
        try {
            System.out.println("2 " + clazz.getResource("/"));
        } catch (Exception e) {
            System.out.println("2 error " + e.getMessage());
        }
        try {
            System.out.println("3 " + clazz.getClassLoader().getResource(""));
        } catch (Exception e) {
            System.out.println("3 error " + e.getMessage());
        }
        System.out.println("4 " + clazz.getResource("test.txt"));
    }

    public static void main(String[] args) {
        println(Main.class);
        try {
            println(Class.forName("test.A"));
        } catch (ClassNotFoundException e) {
            System.out.println("ClassNotFound " + e.getMessage());
        } catch (Exception e) {
            e.printStackTrace();
        }
        try {
            println(Class.forName("oracle.jdbc.driver.OracleDriver"));
        } catch (ClassNotFoundException e) {
            System.out.println("ClassNotFound" + e.getMessage());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

@set CLASSPATH=.;%CLASSPATH%;cl1.jar;ojdbc14_g.jar;

@ECHO java -jar cl2.jar调用**************************************************

@java -jar cl2.jar

@ECHO 将cl2.jar添加到CLASSPATH中
@set CLASSPATH=.;%CLASSPATH%;cl2.jar;

@ECHO java test.Main调用**************************************************
@java test.Main
pause