1 files changed, 73 insertions, 0 deletions
diff --git a/src/test/HotSwapCL.java b/src/test/HotSwapCL.java
new file mode 100644
index 0000000..488e27a
--- /dev/null
+++ b/src/test/HotSwapCL.java
@@ -0,0 +1,73 @@
+package test;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.HashSet;
+import org.apache.log4j.Logger;
+
+import com.nis.nmsclient.util.Utils;
+
+class HotSwapCL extends ClassLoader {
+	private Logger logger = Logger.getLogger(ClassLoader.class);
+	private String basedir; // 需要该类加载器直接加载的类文件的基目录
+	private HashSet dynaclazns; // 需要由该类加载器直接加载的类名
+
+	public HotSwapCL(String basedir, String[] clazns) {
+		super(null); // 指定父类加载器为 null
+		this.basedir = basedir;
+		dynaclazns = new HashSet();
+		loadClassByMe(clazns);
+	}
+
+	private void loadClassByMe(String[] clazns) {
+		for (int i = 0; i < clazns.length; i++) {
+			try {
+				loadDirectly(clazns[i]);
+			} catch (Exception e) {
+				logger.error(Utils.printExceptionStack(e));
+			}
+			dynaclazns.add(clazns[i]);
+		}
+	}
+
+	private Class loadDirectly(String name) throws Exception{
+		Class cls = null;
+		StringBuffer sb = new StringBuffer(basedir);
+		String classname = name.replace('.', File.separatorChar) + ".class";
+		sb.append(File.separator + classname);
+
+		File classF = new File(sb.toString());
+		cls = instantiateClass(name, new FileInputStream(classF), classF
+				.length());
+		return cls;
+	}
+
+	private Class instantiateClass(String name, InputStream fin, long len) throws Exception{
+		byte[] raw = new byte[(int) len];
+		try {
+			fin.read(raw);
+		} catch (IOException e) {
+			throw e;
+		}finally{
+			if(fin!=null){
+				fin.close();
+			}
+		}
+		return defineClass(name, raw, 0, raw.length);
+	}
+
+	protected Class loadClass(String name, boolean resolve)
+			throws ClassNotFoundException {
+		Class cls = null;
+		cls = findLoadedClass(name);
+		if (!this.dynaclazns.contains(name) && cls == null)
+			cls = getSystemClassLoader().loadClass(name);
+		if (cls == null)
+			throw new ClassNotFoundException(name);
+		if (resolve)
+			resolveClass(cls);
+		return cls;
+	}
+}