Java 读取类路径下的资源文件实现代码

 import java.io.IOException; import java.io.InputStream; import java.net.URL; import java.util.ArrayList; import java.util.Enumeration; import java.util.List; public class ResourceLoadUtil { /** * @param args */ public static void main(String[] args) { System.out.println("ByClazz...\n--------------------------"); System.out.println(loadResourceByClazz(String.class, "/java/lang/String.class")); System.out.println(loadResourceByClazz(String.class, "/ResourceLoadUtil.class")); System.out.println(); System.out.println("ByClasLoader...\n--------------------------"); System.out.println(loadResourceByClassLoader("java/lang/String.class")); System.out.println(loadResourceByClassLoader("ResourceLoadUtil.class")); System.out.println(); System.out.println("sByClasLoader...\n--------------------------"); System.out.println(loadResourcesByClassLoader("java/lang/String.class")); System.out.println(loadResourcesByClassLoader("ResourceLoadUtil.class")); System.out.println(loadResourcesByClassLoader("struts-plugin.xml")); } /** * 根据Class加载资源文件 * * @param clazz * @param path *      以'/'开头的路径: 使用绝对路径寻找文件(以ClassPath为根路径开始)<br> *      否则: 使用相对路径寻找文件(相对于clazz位置路径开始) * @return */ public static InputStream loadResourceByClazz(Class clazz, String path) { return clazz.getResourceAsStream(path); } /** * 根据ClassLoader加载资源文件(单个), 使用默认的ClassLoader! * * @param path *      不能以'/'开头的路径 * @return */ public static InputStream loadResourceByClassLoader(String path) { return loadResourceByClassLoader(null, path); } /** * 根据ClassLoader加载资源文件(单个), 使用默认的ClassLoader! * * @param path *      不能以'/'开头的路径 * @return */ public static InputStream loadResourceByClassLoader(ClassLoader cl, String path) { if (cl == null) { cl = Thread.currentThread().getContextClassLoader(); } return cl.getResourceAsStream(path); } /** * 根据ClassLoader加载资源文件(多个),使用默认的ClassLoader! * * @param path *      不能以'/'开头的路径 * @return */ public static List loadResourcesByClassLoader(String path) { return loadResourcesByClassLoader(null, path); } /** * 根据ClassLoader加载资源文件(多个),使用指定的ClassLoader! * * @param path *      不能以'/'开头的路径 * @return */ public static List loadResourcesByClassLoader(ClassLoader cl, String path) { if (cl == null) { cl = Thread.currentThread().getContextClassLoader(); } List urlLst = new ArrayList(); try { Enumeration urlsEnum = cl.getResources(path); while (urlsEnum.hasMoreElements()) { URL url = (URL) urlsEnum.nextElement(); urlLst.add(url); } } catch (IOException e) { e.printStackTrace(); } return urlLst; } } 

 ByClazz... -------------------------- sun.net.www.protocol.jar.JarURLConnection$JarURLInputStream@11cfb549 java.io.BufferedInputStream@a422ede ByClasLoader... -------------------------- sun.net.www.protocol.jar.JarURLConnection$JarURLInputStream@7f12f614 java.io.BufferedInputStream@35d9dc39 sByClasLoader... -------------------------- [jar:file:/D:/Java/jdk1.6.0_25/jre/lib/rt.jar!/java/lang/String.class] [file:/E:/workspace/JBDS/Spring+Struts2-Integration/target/classes/ResourceLoadUtil.class] [jar:file:/E:/360data/%e9%87%8d%e8%a6%81%e6%95%b0%e6%8d%ae/.m2/repository/org/apache/struts/struts2-spring-plugin/2.3.4.1/struts2-spring-plugin-2.3.4.1.jar!/struts-plugin.xml, jar:file:/E:/360data/%e9%87%8d%e8%a6%81%e6%95%b0%e6%8d%ae/.m2/repository/org/apache/struts/struts2-config-browser-plugin/2.3.4.1/struts2-config-browser-plugin-2.3.4.1.jar!/struts-plugin.xml]