字符输入输出流综合练习

public class ReaderAndWriter {
    public static void main(String[] args) {
        //读取文件pet.template
        BufferedReader br=null;
        InputStreamReader isr=null;
        //使用带缓冲区的字符输出流把替换后的新内容写入到pet.txt中
        BufferedWriter bw=null;
        OutputStreamWriter osw=null;
        try {
         isr=new InputStreamReader(
                new FileInputStream("d:/myDoc/pet.txt"),"UTF-8");
        br=new BufferedReader(isr);
        //读取的内容
            StringBuffer sbf=new StringBuffer();
        String line=null;
        while ((line=br.readLine())!=null){
            sbf.append(line);
            }
            System.out.println("替换前:"+sbf);
        //文件内容的替换，把占位符替换为具体宠物信息
            String  newStr=sbf.toString();
            newStr=newStr.replace("{name}","{欧欧}");
            newStr=newStr.replace("{type}","{狗狗}");
            newStr=newStr.replace("{master}","{李伟}");
            System.out.println("替换后"+newStr);
            //将新内容写入到pet.txt文件中
            osw=new OutputStreamWriter(new FileOutputStream("d:/myDoc/pet.txt"),"UTF-8");
            bw=new BufferedWriter(osw);
            bw.write(newStr);
            bw.flush();
        }catch (UnsupportedEncodingException e){
            e.printStackTrace();
        }catch (FileNotFoundException e){
            e.printStackTrace();
        }catch (IOException e){
            e.printStackTrace();
        }finally {
            try {
                br.close();
                isr.close();
                bw.close();
                osw.close();
            }catch (IOException e){
                e.printStackTrace();
            }
        }
    }