java创建txt文件并存入内容

川长思鸟来 2022-06-17 05:30 166阅读 0赞

import java.io.BufferedReader;
    import java.io.File;
    import java.io.FileInputStream;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.io.InputStreamReader;
    import java.io.PrintWriter;
    
    public class txtExport {
    
    	private static String path = "D:/";
    	private static String filenameTemp;
    
    	public static void main(String[] args) throws IOException {
    		txtExport.creatTxtFile("你好");
    		txtExport.writeTxtFile("你好");
    	}
    	
    	
    	/**
    	 * 创建文件
    	 * 
    	 * @throws IOException
    	 */
    	public static boolean creatTxtFile(String name) throws IOException {
    		boolean flag = false;
    		filenameTemp = path + name + ".txt";
    		File filename = new File(filenameTemp);
    		if (!filename.exists()) {
    			filename.createNewFile();
    			flag = true;
    		}
    		return flag;
    	}
    
    	/**
    	 * 写文件
    	 * 
    	 * @param newStr
    	 *            新内容
    	 * @throws IOException
    	 */
    	public static boolean writeTxtFile(String newStr) throws IOException {
    		// 先读取原有文件内容，然后进行写入操作
    		boolean flag = false;
    		String filein = newStr + "\r\n";
    		String temp = "";
    
    		FileInputStream fis = null;
    		InputStreamReader isr = null;
    		BufferedReader br = null;
    
    		FileOutputStream fos = null;
    		PrintWriter pw = null;
    		try {
    			// 文件路径
    			File file = new File(filenameTemp);
    			// 将文件读入输入流
    			fis = new FileInputStream(file);
    			isr = new InputStreamReader(fis);
    			br = new BufferedReader(isr);
    			StringBuffer buf = new StringBuffer();
    
    			// 保存该文件原有的内容
    			for (int j = 1; (temp = br.readLine()) != null; j++) {
    				buf = buf.append(temp);
    				// System.getProperty("line.separator")
    				// 行与行之间的分隔符 相当于“\n”
    				buf = buf.append(System.getProperty("line.separator"));
    			}
    			buf.append(filein);
    
    			fos = new FileOutputStream(file);
    			pw = new PrintWriter(fos);
    			pw.write(buf.toString().toCharArray());
    			pw.flush();
    			flag = true;
    		} catch (IOException e1) {
    			// TODO 自动生成 catch 块
    			throw e1;
    		} finally {
    			if (pw != null) {
    				pw.close();
    			}
    			if (fos != null) {
    				fos.close();
    			}
    			if (br != null) {
    				br.close();
    			}
    			if (isr != null) {
    				isr.close();
    			}
    			if (fis != null) {
    				fis.close();
    			}
    		}
    		return flag;
    	}
    
    }