文件操作--边读边写,在指定位置添加内容(避免乱码)

[java]代码库

	/**
	 * @param lineNumber   选择要添加内容的行数
	 * @param attribute1        选择要添加的内容1
	 * @param attribute2        选择要添加的内容1
	 *  给finalFile,tempFilePath改成你自己的路径就可以用了
	 */
	public static void appendText(int lineNumber, String attribute1, String attribute2) throws IOException {
		int count = 0;
		String tempFilePath=NewPath.sampleFolderPath+"\\temp.java";
		File finalFile = new File(NewPath.sample_Main);
		File tempFile=new File(tempFilePath);
		Utils.CopyFile(NewPath.sample_Main, tempFilePath);
		FileInputStream fileInputStream;
		try {
			fileInputStream = new FileInputStream(tempFile);
			//读取文件类
			InputStreamReader inReader = new InputStreamReader(fileInputStream, "UTF-8");
			BufferedReader bufReader = new BufferedReader(inReader);
			

			
			String line = null;
			
			//写入文件类
			OutputStreamWriter fileWriter = new OutputStreamWriter(new FileOutputStream(finalFile),"UTF-8");   
	        BufferedWriter bufWriter=new BufferedWriter(fileWriter);    
			
			
			//边读边写,并添加内容
			while ((line = bufReader.readLine()) != null) {
				count++;
			    bufWriter.write(line);
			    bufWriter.newLine();
				if (count == lineNumber) {
					bufWriter.append("        item = new HashMap<String, Object>();");
					bufWriter.newLine();
					bufWriter.append("        item.put(\"activity_name\", \"" + attribute1 + "\");");
					bufWriter.newLine();
					bufWriter.append("        item.put(\"activity_class\", " + attribute2 + ");");
					bufWriter.newLine();
					bufWriter.append("        listItems.add(item);");
					bufWriter.newLine();
					bufWriter.newLine();
				}
			}
			//关闭输入输出流
			bufWriter.close();
			fileWriter.close();
			bufReader.close();
			inReader.close();
			fileInputStream.close();
		
			
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		System.gc();
		tempFile.delete();
	}