java一行一行写入或读取数据

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假如E:/phsftp/evdokey目录下有个evdokey_201103221556.txt文件，

现在对evdokey_201103221556.txt文件进行写入或读取操作，并解决写入或读取出现的乱码问题。

/**
     * 一行一行读取文件，适合字符读取，若读取中文字符时会出现乱码
     *
     * 流的关闭顺序：先打开的后关，后打开的先关，
     *       否则有可能出现java.io.IOException: Stream closed异常
     *
     * @throws IOException
     */

@Test
    public void readFile01() throws IOException {
        FileReader fr=new FileReader("E:/phsftp/evdokey/evdokey_201103221556.txt");
        BufferedReader br=new BufferedReader(fr);
        String line="";
        String[] arrs=null;
        while ((line=br.readLine())!=null) {
            arrs=line.split(",");
            System.out.println(arrs[0] + " : " + arrs[1] + " : " + arrs[2]);
        }
        br.close();
        fr.close();
    }

     /**
     * 一行一行读取文件，解决读取中文字符时出现乱码
     *
     * 流的关闭顺序：先打开的后关，后打开的先关，
     *       否则有可能出现java.io.IOException: Stream closed异常
     *
     * @throws IOException
     */
    @Test
    public void readFile02() throws IOException {
        FileInputStream fis=new FileInputStream("E:/phsftp/evdokey/evdokey_201103221556.txt");
        InputStreamReader isr=new InputStreamReader(fis, "UTF-8");
        BufferedReader br = new BufferedReader(isr);
        //简写如下
        //BufferedReader br = new BufferedReader(new InputStreamReader(
        //        new FileInputStream("E:/phsftp/evdokey/evdokey_201103221556.txt"), "UTF-8"));
        String line="";
        String[] arrs=null;
        while ((line=br.readLine())!=null) {
            arrs=line.split(",");
            System.out.println(arrs[0] + " : " + arrs[1] + " : " + arrs[2]);
        }
        br.close();
        isr.close();
        fis.close();
    }
   

/**      *

一行一行写入文件，适合字符写入，若写入中文字符时会出现乱码

     *      * 流的关闭顺序：先打开的后关，后打开的先关，

     *       否则有可能出现java.io.IOException: Stream closed异常

     *      * @throws IOException      */

    @Test    

public void writeFile01() throws IOException {  

       String[] arrs={  "zhangsan,23,FuJian",   "lisi,30,ShangHai", "wangwu,43,BeiJing", "laolin,21,ChongQing",      "ximenqing,67,GuiZhou"    };      

   FileWriter fw=new FileWriter(new File("E:/phsftp/evdokey/evdokey_201103221556.txt"));//写入中文字符时会出现乱码                  BufferedWriter  bw=new BufferedWriter(fw);      

   //BufferedWriter  bw=new BufferedWriter

(new BufferedWriter(new OutputStreamWriter(new FileOutputStream(

new File("E:/phsftp/evdokey/evdokey_201103221556.txt")), "UTF-8")));

        for(String arr:arrs){

            bw.write(arr+"\t\n");   

      }      

       bw.close(); 

       fw.close();  

   }

java一行一行写入或读取数据

标签：blog   http   ar   io   os   sp   for   java   on   

原文地址：http://www.cnblogs.com/yy123/p/4170473.html