Java安全性编程实例,解压看说明

				import java.security.*;
				import java.io.*;
				public class MyactionKS implements PrivilegedAction {
					public Object run() {
				        String content="";
				        String s;
				        String filename="c:\\autoexec.bat";
				        BufferedReader in;
				        try{
					        in = new BufferedReader(new FileReader(filename));
				   	        while ((s = in.readLine( )) != null) {
				               content+=s+"\n";
				           }
				        }
				        catch(IOException e){
				             System.out.println(e);
				        }
				  	return content;
					}
				}