java IO 修改文件内容操作

[qq_30721465]

public class LineManager {
	Scanner input = new Scanner(System.in);
	static List<Line> lineList = null;
	public static List<? extends Object> getAllEntity(File file) throws ParseException{
		FileInputStream fis = null;
		InputStreamReader isr = null;
		BufferedReader br = null;
		//读取的是Line.txt
		try {
			fis = new FileInputStream(file);
			isr = new InputStreamReader(fis,"UTF-8");
			br = new BufferedReader(isr);
			if("Line.txt".equals(file.getName())){
				lineList = new ArrayList<Line>();
				String temp = "";
				while((temp=br.readLine())!=null){
					String [] lineTemp = temp.split(",");
					Line line = new Line();
					line.setTno(lineTemp[0]);
					line.setXiname(lineTemp[1]);
					line.setXldate(lineTemp[2]);
					line.setTs(lineTemp[3]);
					line.setStart(lineTemp[4]);
					line.setJzd(lineTemp[5]);
					line.setFc(lineTemp[6]);
					line.setJz(lineTemp[7]);
					line.setCdf(lineTemp[8]);
					line.setDdd(lineTemp[9]);
					line.setXingcheng(lineTemp[10]);
					line.setXcbz(lineTemp[11]);
					//字符型
					line.setStatus(Integer.parseInt(lineTemp[12]));
					lineList.add(line);
				}
				return lineList;
			}else if("Line.txt".equals(file.getName())){
			}
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}finally{
			try {
				br.close();
				isr.close();
				fis.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		return null;
	}
	//实体类的持久化 
	//参数：File写入的文件,Object
	public static void insertEntity(File file,Object object){
		FileOutputStream fos = null;
		OutputStreamWriter osw = null;
		BufferedWriter bw = null;
		try {
			fos = new FileOutputStream(file,true);
			osw = new OutputStreamWriter(fos,"UTF-8");
			bw = new BufferedWriter(osw);
			//以下要写入，写入之前，需要判断写入的实体类型
			if(object instanceof Line){
				Line line = (Line) object;
				//以下按照写入Line的方法
				String lineInsert = 
						String.format("%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%d",line.getTno(),line.getXiname(),line.getXldate(),line.getTs()
									,line.getStart(),line.getJzd(),line.getFc(),line.getJz(),line.getCdf(),line.getDdd(),line.getXingcheng()
									,line.getXcbz(),line.getStatus());
				
				bw.write("\r\n");
				bw.write(lineInsert);
				bw.flush();
			}else if(object instanceof Line){
			}
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}finally{
			try {
				bw.close();
				osw.close();
				fos.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}
	/**
	 * 查询并显示所有线路信息
	 */
	@SuppressWarnings("unchecked")
	public void printItemInFormation(){
		try {
			lineList = (List<Line>)getAllEntity(new File("entity_text\\Line.txt"));
		} catch (ParseException e) {
			e.printStackTrace();
		} 
		for(Line i:lineList){
			System.out.println(i);
		}
	}
	/**
	 * 写入线路信息
	 */
	public void readin(Line line){
		System.out.println("请输入线路编号：");
		line.setTno(input.next());
		System.out.println("请输入线路名称：");
		line.setXiname(input.next());
		System.out.println("请输入出团日期：(xxxx年x月x日)");
		line.setXldate(input.next());
		System.out.println("请输入天数：");
		line.setTs(input.next());
		System.out.println("请输入出发的交通工具：");
		line.setStart(input.next()); 
		System.out.println("请输入集合地点：");
		line.setJzd(input.next());
		System.out.println("请输入返程的交通工具：");
		line.setFc(input.next());
		System.out.println("请输入接站电话：");
		line.setJz(input.next());
		System.out.println("请输入出发地：");
		line.setCdf(input.next());
		System.out.println("请输入抵达地点：");
		line.setDdd(input.next());
		System.out.println("请输入行程备注：");
		line.setXingcheng(input.next());
		System.out.println("请输入线路简介：");
		line.setXcbz(input.next());
		System.out.println("请输入线路开关  1：线路开放 0：线路暂不开放");
		line.setStatus(input.nextInt());
		register(line);
		System.out.println("添加成功\n");
		
	}
	/**
	 * 调用写入的地址
	 * @param l
	 */
	public void register(Line line){
		File file = new File("entity_text\\Line.txt");
		insertEntity(file, line);
	}
	/**
	 * 关闭线路操作
	 */
	public void Delete(Line line){
			System.out.println("请输入要删除线路的编号：");
			String num=input.next();
			int j=-1;
			for(int x=0;x<lineList.size();x++){
				if(num.equals(lineList.get(x).getTno())){
					j=x;
				}
			}
			if(j==-1){
				System.out.println("找不到该线路");
			}else{
				lineList.set(j, line).setStatus(0);
			}
}

	
	
	
		
		
	
}

各位大神帮我看看 最后的关闭文件操作怎么改
可以输入编号 修改最后的开关
然后再存进文件中啊

[qq_30721465]

求大神帮助啊

[qq_30721465]