【原创】Copy源文件，并去掉注释
/** DelComment.java
*
* Copy this file to Copy.java,
* and get rid of the comments.
*
* Author:李文雄。033534026
* Class :电子政务
*
* Time:04-08-2005
*
* 可以把一些//和/*嵌套的注释也能够去掉，
* 另外也可以区别出那些是字符串的字符，而不是注释。
* 完成的功能比较好
*
*/
package Class;
import java.io.*;
public class DelComment{
private static void outLine(BufferedWriter out,String line ,int n){
// Used to write to the outfile
String s = "第" + n + "行：";
line = s + line;
try{
out.write(line);
out.newLine();
}
catch(IOException e){
e.printStackTrace();
}
}
public static void main(String[] args){ //Main Function
int n = 0; // note the line number
String line = ""; //Used to load the string
String temp = "";
int cmtIndex0 = -1; //用来标记 字符串引号 "
int cmtIndex4 = -1;
int cmtIndex1 = -1; //用来标记 注释符号 //
int cmtIndex2 = -1; //用来标记 注释符号 /* */
boolean isCmt1 = false; //用来标记 注释符号 //
boolean isCmt2 = false; //用来标记 注释符号 /* */
try{
BufferedReader in = new BufferedReader(new InputStreamReader(new FileInputStream("DelComment.java")));
//BufferedWriter out = new BufferedWriter(new FileWriter("copy.java"));
BufferedWriter out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream("copy.java")));
while((temp = in.readLine()) != null){
cmtIndex2 = temp.indexOf("*/");
if((cmtIndex2 != -1) && isCmt2){
isCmt2 = false;
line = temp.substring(cmtIndex2+2);
n++;
outLine(out,line,n);
continue;
}
if(isCmt2) continue;
cmtIndex0 = temp.indexOf("\""); //出现左引号"的位置
cmtIndex1 = temp.indexOf("//");
cmtIndex2 = temp.indexOf("/*");
cmtIndex4 = temp.indexOf("\"",cmtIndex0+1); //出现右引号"的位置
if( !((cmtIndex0 < cmtIndex1) && (cmtIndex1 < cmtIndex4)) ){
// "//" 不是在两个引号之间
if(cmtIndex1 != -1){
if( (cmtIndex1 < cmtIndex2) || (cmtIndex2 == -1))
if(cmtIndex1 > 0){
line = temp.substring(0,cmtIndex1);
n++;
outLine(out,line,n);
continue;
}
}
}
if( !((cmtIndex0 < cmtIndex2) && (cmtIndex2 < cmtIndex4)) ){
// "/*" 不是在两个引号之间
if(cmtIndex2 != -1){
if(cmtIndex2 > 0){
line = temp.substring(0,cmtIndex2);
n++;
outLine(out,line,n);
}
isCmt2 = true;
continue;
}
}
n++;
outLine(out,temp,n);
}
in.close();
out.close();
}catch(EOFException e){} //catch the exception
catch(IOException e){
e.printStackTrace();
}
catch(Exception e){
e.printStackTrace();
}
//********* Those below just for test of "Get rid of comment"
String str1 = "// This is just to test about (//)";
String str2 = "/* This is just to test about (/* */) */";
System.out.println(str1);
System.out.println(str2);
}
}
==>输出结果：