Java Jar.close方法代码示例

import org.apache.tomcat.util.scan.Jar; //导入方法依赖的package包/类
/**
 * Scan JARs that contain web-fragment.xml files that will be used to
 * configure this application to see if they also contain static resources.
 * If static resources are found, add them to the context. Resources are
 * added in web-fragment.xml priority order.
 */
protected void processResourceJARs(Set<WebXml> fragments) {
    for (WebXml fragment : fragments) {
        URL url = fragment.getURL();
        Jar jar = null;
        try {
            // Note: Ignore file URLs for now since only jar URLs will be accepted
            if ("jar".equals(url.getProtocol())) {
                jar = JarFactory.newInstance(url);
                if (jar.entryExists("META-INF/resources/")) {
                    context.addResourceJarUrl(url);
                }
            }
        } catch (IOException ioe) {
            log.error(sm.getString("contextConfig.resourceJarFail", url,
                    context.getName()));
        } finally {
            if (jar != null) {
                jar.close();
            }
        }
    }
}
 

import org.apache.tomcat.util.scan.Jar; //导入方法依赖的package包/类
@Override
public void scan(JarURLConnection jarConn) throws IOException {

    URL url = jarConn.getURL();
    URL resourceURL = jarConn.getJarFileURL();
    Jar jar = null;
    InputStream is = null;
    WebXml fragment = new WebXml();

    try {
        jar = JarFactory.newInstance(url);
        if (parseRequired || context.getXmlValidation()) {
            is = jar.getInputStream(FRAGMENT_LOCATION);
        }

        if (is == null) {
            // If there is no web-fragment.xml to process there is no
            // impact on distributable
            fragment.setDistributable(true);
        } else {
            InputSource source = new InputSource(
                    "jar:" + resourceURL.toString() + "!/" +
                    FRAGMENT_LOCATION);
            source.setByteStream(is);
            parseWebXml(source, fragment, true);
        }
    } finally {
        if (jar != null) {
            jar.close();
        }
        fragment.setURL(url);
        if (fragment.getName() == null) {
            fragment.setName(fragment.getURL().toString());
        }
        fragment.setJarName(extractJarFileName(url));
        fragments.put(fragment.getName(), fragment);
    }
}
 

import org.apache.tomcat.util.scan.Jar; //导入方法依赖的package包/类
@Override
public void scan(JarURLConnection jarConn) throws IOException {

	URL url = jarConn.getURL();
	URL resourceURL = jarConn.getJarFileURL();
	Jar jar = null;
	InputStream is = null;
	WebXml fragment = new WebXml();

	try {
		jar = JarFactory.newInstance(url);
		if (parseRequired || context.getXmlValidation()) {
			is = jar.getInputStream(FRAGMENT_LOCATION);
		}

		if (is == null) {
			// If there is no web-fragment.xml to process there is no
			// impact on distributable
			fragment.setDistributable(true);
		} else {
			InputSource source = new InputSource("jar:" + resourceURL.toString() + "!/" + FRAGMENT_LOCATION);
			source.setByteStream(is);
			parseWebXml(source, fragment, true);
		}
	} finally {
		if (jar != null) {
			jar.close();
		}
		fragment.setURL(url);
		if (fragment.getName() == null) {
			fragment.setName(fragment.getURL().toString());
		}
		fragment.setJarName(extractJarFileName(url));
		fragments.put(fragment.getName(), fragment);
	}
}
 

import org.apache.tomcat.util.scan.Jar; //导入方法依赖的package包/类
private void tldScanJar(JarURLConnection jarConn) throws IOException {

        Jar jar = null;
        InputStream is;
        boolean foundTld = false;
        
        URL resourceURL = jarConn.getJarFileURL();
        String resourcePath = resourceURL.toString();
        
        try {
            jar = JarFactory.newInstance(jarConn.getURL());
            
            jar.nextEntry();
            String entryName = jar.getEntryName();
            while (entryName != null) {
                if (entryName.startsWith("META-INF/") &&
                        entryName.endsWith(".tld")) {
                    is = null;
                    try {
                        is = jar.getEntryInputStream();
                        foundTld = true;
                        tldScanStream(resourcePath, entryName, is);
                    } finally {
                        if (is != null) {
                            try {
                                is.close();
                            } catch (IOException ioe) {
                                // Ignore
                            }
                        }
                    }
                }
                jar.nextEntry();
                entryName = jar.getEntryName();
            }
        } finally {
            if (jar != null) {
                jar.close();
            }
        }

        if (!foundTld) {
            if (log.isDebugEnabled()) {
                log.debug(Localizer.getMessage("jsp.tldCache.noTldInJar",
                        resourcePath));
            } else if (showTldScanWarning) {
                // Not entirely thread-safe but a few duplicate log messages are
                // not a huge issue
                showTldScanWarning = false;
                log.info(Localizer.getMessage("jsp.tldCache.noTldSummary"));
            }
        }
    }
 

import org.apache.tomcat.util.scan.Jar; //导入方法依赖的package包/类
@Test
public void testClassParserPerformance() throws IOException {
    File libDir = new File(JAR_LOCATION);
    String[] libs = libDir.list();

    Assert.assertNotNull(libs);

    Set<URL> jarURLs = new HashSet<URL>();

    for (String lib : libs) {
        if (!lib.toLowerCase(Locale.ENGLISH).endsWith(".jar")) {
            continue;
        }
        jarURLs.add(new URL("jar:" + new File (libDir, lib).toURI().toURL().toExternalForm() + "!/"));
    }

    long duration = 0;

    for (URL jarURL : jarURLs) {
        Jar jar = JarFactory.newInstance(jarURL);
        try {
            jar.nextEntry();
            String jarEntryName = jar.getEntryName();
            while (jarEntryName != null) {
                if (jarEntryName.endsWith(".class")) {
                    InputStream is = jar.getEntryInputStream();
                    long start = System.nanoTime();
                    ClassParser cp = new ClassParser(is);
                    cp.parse();
                    duration += System.nanoTime() - start;
                }
                jar.nextEntry();
                jarEntryName = jar.getEntryName();
            }
        } finally {
            jar.close();
        }
    }

    System.out.println("ClassParser performance test took: " + duration + " ns");
}
 

import org.apache.tomcat.util.scan.Jar; //导入方法依赖的package包/类
private void tldScanJar(JarURLConnection jarConn) throws IOException {

		Jar jar = null;
		InputStream is;
		boolean foundTld = false;

		URL resourceURL = jarConn.getJarFileURL();
		String resourcePath = resourceURL.toString();

		try {
			jar = JarFactory.newInstance(jarConn.getURL());

			jar.nextEntry();
			String entryName = jar.getEntryName();
			while (entryName != null) {
				if (entryName.startsWith("META-INF/") && entryName.endsWith(".tld")) {
					is = null;
					try {
						is = jar.getEntryInputStream();
						foundTld = true;
						tldScanStream(resourcePath, entryName, is);
					} finally {
						if (is != null) {
							try {
								is.close();
							} catch (IOException ioe) {
								// Ignore
							}
						}
					}
				}
				jar.nextEntry();
				entryName = jar.getEntryName();
			}
		} finally {
			if (jar != null) {
				jar.close();
			}
		}

		if (!foundTld) {
			if (log.isDebugEnabled()) {
				log.debug(Localizer.getMessage("jsp.tldCache.noTldInJar", resourcePath));
			} else if (showTldScanWarning) {
				// Not entirely thread-safe but a few duplicate log messages are
				// not a huge issue
				showTldScanWarning = false;
				log.info(Localizer.getMessage("jsp.tldCache.noTldSummary"));
			}
		}
	}
 

import org.apache.tomcat.util.scan.Jar; //导入方法依赖的package包/类
@Override
public void scan(JarURLConnection jarConn, String webappPath, boolean isWebapp)
        throws IOException {

    URL url = jarConn.getURL();
    URL resourceURL = jarConn.getJarFileURL();
    Jar jar = null;
    InputStream is = null;
    WebXml fragment = new WebXml();
    fragment.setWebappJar(isWebapp);
    fragment.setDelegate(delegate);

    try {
        // Only web application JARs are checked for web-fragment.xml
        // files.
        // web-fragment.xml files don't need to be parsed if they are never
        // going to be used.
        if (isWebapp && parseRequired) {
            jar = JarFactory.newInstance(url);
            is = jar.getInputStream(FRAGMENT_LOCATION);
        }

        if (is == null) {
            // If there is no web.xml, normal JAR no impact on
            // distributable
            fragment.setDistributable(true);
        } else {
            InputSource source = new InputSource(
                    "jar:" + resourceURL.toString() + "!/" + FRAGMENT_LOCATION);
            source.setByteStream(is);
            if (!webXmlParser.parseWebXml(source, fragment, true)) {
                ok = false;
            }
        }
    } finally {
        if (jar != null) {
            jar.close();
        }
        fragment.setURL(url);
        if (fragment.getName() == null) {
            fragment.setName(fragment.getURL().toString());
        }
        fragment.setJarName(extractJarFileName(url));
        fragments.put(fragment.getName(), fragment);
    }
}
 

import org.apache.tomcat.util.scan.Jar; //导入方法依赖的package包/类
/**
 * Scan JARs for ServletContainerInitializer implementations.
 * Implementations will be added in web-fragment.xml priority order.
 */
protected void processServletContainerInitializers(
        Set<WebXml> fragments) {
    
    for (WebXml fragment : fragments) {
        URL url = fragment.getURL();
        Jar jar = null;
        InputStream is = null;
        ServletContainerInitializer sci = null;
        try {
            if ("jar".equals(url.getProtocol())) {
                jar = JarFactory.newInstance(url);
                is = jar.getInputStream(SCI_LOCATION);
            } else if ("file".equals(url.getProtocol())) {
                String path = url.getPath();
                File file = new File(path, SCI_LOCATION);
                if (file.exists()) {
                    is = new FileInputStream(file);
                }
            }
            if (is != null) {
                sci = getServletContainerInitializer(is);
            }
        } catch (IOException ioe) {
            log.error(sm.getString(
                    "contextConfig.servletContainerInitializerFail", url,
                    context.getName()));
            ok = false;
            return;
        } finally {
            if (is != null) {
                try {
                    is.close();
                } catch (IOException e) {
                    // Ignore
                }
            }
            if (jar != null) {
                jar.close();
            }
        }
        
        if (sci == null) {
            continue;
        }

        initializerClassMap.put(sci, new HashSet<Class<?>>());
        
        HandlesTypes ht =
            sci.getClass().getAnnotation(HandlesTypes.class);
        if (ht != null) {
            Class<?>[] types = ht.value();
            if (types != null) {
                for (Class<?> type : types) {
                    Set<ServletContainerInitializer> scis =
                        typeInitializerMap.get(type);
                    if (scis == null) {
                        scis = new HashSet<ServletContainerInitializer>();
                        typeInitializerMap.put(type, scis);
                    }
                    scis.add(sci);
                }
            }
        }

    }
}
 

import org.apache.tomcat.util.scan.Jar; //导入方法依赖的package包/类
@Override
public void scan(JarURLConnection jarConn) throws IOException {
    
    URL url = jarConn.getURL();
    URL resourceURL = jarConn.getJarFileURL();
    Jar jar = null;
    InputStream is = null;
    WebXml fragment = new WebXml();

    try {
        jar = JarFactory.newInstance(url);
        is = jar.getInputStream(FRAGMENT_LOCATION);

        if (is == null) {
            // If there is no web.xml, normal JAR no impact on
            // distributable
            fragment.setDistributable(true);
        } else {
            InputSource source = new InputSource(
                    resourceURL.toString() + "!/" + FRAGMENT_LOCATION);
            source.setByteStream(is);
            parseWebXml(source, fragment, true);
        }
    } finally {
        if (is != null) {
            try {
                is.close();
            } catch (IOException ioe) {
                // Ignore
            }
        }
        if (jar != null) {
            jar.close();
        }
        fragment.setURL(url);
        if (fragment.getName() == null) {
            fragment.setName(fragment.getURL().toString());
        }
        fragments.put(fragment.getName(), fragment);
    }
}