将对象写入文件代码示例

来源：互联网发布：数据通信与网络 pdf 编辑：程序博客网时间：2024/06/11 09:49

/**     * 生成数据下载结果文件至指定目录     * @param localDatePath 文件路径     * @param fileName 文件名     * @param downTaskPsgInfos 某趟航班下的旅客数据     */public  void getDownTaskResultTxt(String localDatePath,String fileName,List<DownTaskPsgInfo> downTaskPsgInfos) {//判断文件路径是否存在，若不存在，先新建指定目录        File f=new File(localDatePath);        if(!f.exists())        f.mkdirs();    //  判断文件是否存在，若存在，先删除再写入一份最新的记录        File downTaskResultFile = new File(localDatePath+fileName);        if(downTaskResultFile.exists())        downTaskResultFile.delete();                BufferUtil fltFile = new BufferUtil();        BufferedWriter bufferW;try {bufferW = fltFile.getBw(localDatePath+fileName);for(int i =0;i<downTaskPsgInfos.size();i++){StringBuffer buffer = new StringBuffer("");DownTaskPsgInfo downTaskPsgInfo = new DownTaskPsgInfo();downTaskPsgInfo=downTaskPsgInfos.get(i) ;//将旅客订座记录中字段信息写入数据下载结果文件buffer.append(downTaskPsgInfo.getDptAirptCd());buffer.append(downTaskPsgInfo.getArrvAirptCd());        。。。。。。。buffer.append(downTaskPsgInfo.getBkDay());buffer.append(downTaskPsgInfo.getActionCd());buffer.append("|");buffer.append(downTaskPsgInfo.getPsgCnName());buffer.append("|");buffer.append(downTaskPsgInfo.getPnrInfo().replace("\r\n", "~"));bufferW.write(buffer.toString());bufferW.newLine();}   bufferW.close();} catch (IOException e) {log.error("---> 生成数据文件失败 " + localDatePath+fileName);e.printStackTrace();}log.info("---> 成功生成数据文件 " + localDatePath+fileName);}

import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStreamReader;import java.io.OutputStreamWriter;/** * Time: 11:21:26 * Apply reader or writer buffer encodered in GBK. */public class BufferUtil {    /**     * Create a BuffererdReader from the specified file.     *     * @param filename the file to be readed as GBK BufferedReader.     * @return <code>BufferedReader br</code>     */    public BufferedReader getBr(String filename) throws IOException {        BufferedReader br = null;        br = new BufferedReader(new InputStreamReader(new FileInputStream(filename), "GBK"));        return br;    }    /**     * Create a BufferedWriter from the specified file.     *     * @param fileName the file to be added as GBK BufferedWriter     *                 which will be writed in.     * @return <code>BufferedWriter bw</code>     */    public BufferedWriter getBw(String fileName) throws IOException {        BufferedWriter bw = null;               bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(fileName), "GBK"));        return bw;    }}

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