java 边读边写文件_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();");

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();

}