java mail 保存附件 java file保存

包 swing
 
类
 
JFileChooser jfile；
 
ui美化
 
UImanager.setLookAndfeel(uimanager.getsystemlookandfeel)
 
放在jfile之前
 
文件流
 
保存
 
将text 写入file
 
File file=new File(jfile.getSelectfile());     //选中文件写入·哪里
 
Bufferwriter bf=new bufferwriter(new writer(file));
 
bf.write(textArea.gettext());                //得到text写进file
 
bf.close();
 

 
jf.showDialog(jf,"save as");
     File file=jf.getSelectedFile();
     try {
      BufferedWriter fi=new BufferedWriter(new FileWriter(file));
      fi.write(f.getText());
      fi.close();
      } catch (FileNotFoundException e11) {e11.printStackTrace(); } catch (IOException e1) {
      e1.printStackTrace();
     } 

 
将file 打开到text
 
File file=new File(jfile.getSelectfile());
 
bufferreader bfr=new bufferreader(new filereader(file));
 
string t=brf.readline()  //读取file，写在text
 
brf.close();
 
f.setText(t);
 

 
File file_o=openv.getSelectedFile();
     if(file_o.getName().endsWith(".txt"))
     {
       BufferedReader fi;
       try {
        fi = new BufferedReader(new FileReader(file_o));
        f.setText(fi.readLine());
        fi.close();