計算JAVA源代碼行數的代碼

計算JAVA源代碼（src）行數，不計算空行

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.util.ArrayList;
import java.util.List;

/**


@description 計算源代碼（src）行數，不計算空行
宗旨：將src下所有文件組裝成list,再篩選出文件，對文件進行遍歷讀取


*/
public class LineCounter {
    List<File> list = new ArrayList<File>();
    int linenumber = 0;

FileReader fr = null;
BufferedReader br = null;

public void counter(String projectName) {

//        String path = System.getProperty("user.dir");
        String path = LineCounter.class.getResource("/").getPath();  // 同下個path
        path = path.substring(0, path.length() - 24) + projectName + "/src/main/java";
        System.out.println(path);
        File file = new File(path);
        File files[] = null;
        files = file.listFiles();
        addFile(files);
        isDirectory(files);
        readLinePerFile();
        System.out.println("Totle:" + linenumber + "行");
    }

// 判斷是否是目錄
public void isDirectory(File[] files) {
    for (File s : files) {
        if (s.isDirectory()) {
            File file[] = s.listFiles();
            addFile(file);
            isDirectory(file);
            continue;
        }
    }
}

//將src下所有文件組織成list
public void addFile(File file[]) {
    for (int index = 0; index < file.length; index++) {
        list.add(file[index]);
        // System.out.println(list.size());
    }
}

//讀取非空白行
public void readLinePerFile() {
    try {
        for (File s : list) {
            int yuan = linenumber;
            if (s.isDirectory()) {
                continue;
            }
            fr = new FileReader(s);
            br = new BufferedReader(fr);
            String i = "";
            while ((i = br.readLine()) != null) {
                if (isBlankLine(i))
                    linenumber++;
            }
            System.out.print(s.getName());
            System.out.println("\t\t有" + (linenumber - yuan) + "行");
        }
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        if (br != null) {
            try {
                br.close();
            } catch (Exception e) {
            }
        }
        if (fr != null) {
            try {
                fr.close();
            } catch (Exception e) {
            }
        }
    }
}

//是否是空行
public boolean isBlankLine(String i) {
    if (i.trim().length() == 0) {
        return false;
    } else {
        return true;
    }
}

public static void main(String args[]) {
    LineCounter lc = new LineCounter();
    String projectName = "/maps1.2";     //這里傳入你的項目名稱
    lc.counter(projectName);
}

}
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 來自：http://my.oschina.net/u/2322635/blog/384628