《Thinking in Java》源码导入Eclipse报错解决方法

这段时间在看《Thinking in Java》，下载了他的源码，但是导入Eclipse却报错，发现很多源文件是缺少了package语句。所以写了一个Demo解决此问题。

运行代码时会弹出文件选择框，需要选择你的《Thinking in Java》的源代码的根目录。代码如下

package sample;import java.awt.Container;import java.awt.FlowLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.io.*;import java.util.ArrayList;import java.util.Arrays;import java.util.List;import javax.swing.JButton;import javax.swing.JFileChooser;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.SwingUtilities;import javax.swing.UIManager;import javax.swing.UnsupportedLookAndFeelException;class Filter implements FileFilter{public boolean accept(File file){if(file.getName().endsWith(".java")||file.isDirectory())return true;return false;}}public class AddPackage {   public static final Filter FILTER=new Filter();   public File getRootFile(){   File file=null;   try{   UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());   JFileChooser jfc=new JFileChooser();   jfc.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);   int result=jfc.showOpenDialog(null);   if(result==JFileChooser.APPROVE_OPTION){   file=jfc.getSelectedFile();   System.out.println(file.getName());      }     }catch(Exception e){   e.printStackTrace();   System.out.println(e.getMessage());   } return file;   }   public void start(){   File file=getRootFile();   if(file!=null){   addPackage(file,"");   }else{   System.out.println("the file is null");   }   }   public void addPackage(File file,String path){   if(file.isFile()){   add(file,path);   return;   }else{   File files[]=file.listFiles(FILTER); //  System.out.println("files.size="+files.length);   for(File temp:files){   if(temp.isFile()){   addPackage(temp,path);   }else{   addPackage(temp,path+"."+temp.getName());   }   }   }   }   public boolean add(File file,String path){   if(path.equals(""))   return false;   if(path.startsWith(".")){   path=path.substring(1, path.length());   }   RandomAccessFile raf;   try{   raf=new RandomAccessFile(file,"rw");   if(isContainPackage(raf)==false){     writePackage(raf,path);   return true;   }   raf.close();   }catch(Exception e){   e.printStackTrace();   System.out.println(e.getMessage());   }    return false;// never reach here   }   public void writePackage(RandomAccessFile raf,String target) {   try{   target="package "+target+";\n";   raf.seek(0);   int length=(int)raf.length();   int size=200;//一次读入字节数   byte []array;   int count=length/size;   //System.out.println("the file length="+length);   //System.out.println("count="+count);   List<byte[]> list=new ArrayList<byte[]>();   for(int i=0;i<count+1;i++){   array=new byte[size];   raf.read(array);   list.add(array);  // System.out.println(new String(array));   }   raf.seek(0);   raf.write(target.getBytes());  // System.out.println("write");   int listSize=list.size();   for(int i=0;i<listSize-1;i++){   raf.write(list.get(i));   }   String lastLine=new String(list.get(listSize-1));  // System.out.println("the lastLine is"+lastLine+"end");   raf.write(lastLine.trim().getBytes());  /* for(byte[] temp:list){   System.out.println("toString:"+Arrays.toString(temp)+"end");   raf.write(temp);   }*/  // System.out.println(list.size());  // System.out.println("write after");   raf.close();   }catch(Exception e){   e.printStackTrace();   System.out.println(e.getMessage());   }     }   public boolean isContainPackage(File file) throws FileNotFoundException{   return isContainPackage(new RandomAccessFile(file,"r"));   }   public boolean isContainPackage(RandomAccessFile raf){   try{   raf.seek(0);   String s="";   while((s=raf.readLine())!=null){   // System.out.println("read:  "+s);   if(s.startsWith("package")){   return true;   }   }   }catch(Exception e){   e.printStackTrace();   System.out.println(e.getMessage());   }   return false;   }   public static void main(String args[]) throws ClassNotFoundException, InstantiationException, IllegalAccessException, UnsupportedLookAndFeelException{   AddPackage app=new AddPackage();   app.start();   System.out.println("exit");   } }