Java获取classpath路径总结

Java获取classpath路径总结

1概述

这里我对异常情况也做了屏蔽，给大家参考一下。资源文件放在资源目录即可。

1.1静态获取

private static
URL currentStaticClassPathResourceUrl
= null;

static {
    //1.静态调用:不能加/,而且还没有:
file:
    currentStaticClassPathResourceUrl
= Thread.currentThread().getContextClassLoader().getResource("packetText1.txt");
    if
(null
== currentStaticClassPathResourceUrl) {
//支持非:JDK7和
JDK8
        currentStaticClassPathResourceUrl
= Thread.currentThread().getContextClassLoader().getResource("/packetText1.txt");
    }
    System.out.println("[static]"
+ currentStaticClassPathResourceUrl.getPath());
}
 
public void
testImmulateClient2() {

    String ip = "127.0.0.1";
    int
port = 1500;

    PacketImmulateSender packetSender =
new PacketImmulateSender(ip, port,
new File(currentStaticClassPathResourceUrl.getPath()));
    Thread senderThread = new
Thread(packetSender);
    senderThread.start();

    try
{
        Thread.sleep(2000
* 60);
    } catch
(InterruptedException e) {
        e.printStackTrace();
    }
    System.out.println("SubjectObserverClientTest End.");
}
 
 

1.2对象方法获取

public void
testImmulateClient() {

    String ip = "127.0.0.1";
    int
port = 1500;

    URL currentNoStaticClassPathResourceUrl =
null;
    //非静态调用:加/
    currentNoStaticClassPathResourceUrl =
this.getClass().getResource("/packetText1.txt");
    if
(null
== currentNoStaticClassPathResourceUrl) {
        currentNoStaticClassPathResourceUrl =
this.getClass().getResource("packetText1.txt");
    }
    System.out.println("[no-static]"
+ currentNoStaticClassPathResourceUrl.getPath());

    PacketImmulateSender packetSender =
new PacketImmulateSender(ip, port,
new File(currentNoStaticClassPathResourceUrl.getPath()));
    Thread senderThread = new
Thread(packetSender);
    senderThread.start();

    try
{
        Thread.sleep(2000
* 60);
    } catch
(InterruptedException e) {
        e.printStackTrace();
    }
    System.out.println("SubjectObserverClientTest End.");
}