java一行一行寫入或讀取資料

假如E:/phsftp/evdokey目錄下有個evdokey_201103221556.txt檔案，

現在對evdokey_201103221556.txt檔案進行寫入或讀取操作，並解決寫入或讀取出現的亂碼問題。

               

檔案內容如：

zhangsan,23,福建    
lisi,30,上海    
wangwu,43,北京    
laolin,21,重慶    
ximenqing,67,貴州    

                

代碼如下：

    /**
     * 一行一行讀取檔案，適合字元讀取，若讀取中文字元時會出現亂碼
     * 
     * 流的關閉順序：先開啟的後關，後開啟的先關，
     *       否則有可能出現java.io.IOException: Stream closed異常
     * 
     * @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();
    }

/**
     * 一行一行讀取檔案，解決讀取中文字元時出現亂碼
     * 
     * 流的關閉順序：先開啟的後關，後開啟的先關，
     *       否則有可能出現java.io.IOException: Stream closed異常
     * 
     * @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);
//簡寫如下
//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();
    }

/**
     * 一行一行寫入檔案，適合字元寫入，若寫入中文字元時會出現亂碼
     * 
     * 流的關閉順序：先開啟的後關，後開啟的先關，
     *       否則有可能出現java.io.IOException: Stream closed異常
     * 
     * @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"));
//寫入中文字元時會出現亂碼
        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();
    }

/**
     * 一行一行寫入檔案，解決寫入中文字元時出現亂碼
     * 
     * 流的關閉順序：先開啟的後關，後開啟的先關，
     *       否則有可能出現java.io.IOException: Stream closed異常
     * 
     * @throws IOException 
*/
    @Test
public void writeFile02() throws IOException {
        String[] arrs={
"zhangsan,23,福建",
"lisi,30,上海",
"wangwu,43,北京",
"laolin,21,重慶",
"ximenqing,67,貴州"
        };
//寫入中文字元時解決中文亂碼問題
        FileOutputStream fos=new FileOutputStream(new File("E:/phsftp/evdokey/evdokey_201103221556.txt"));
        OutputStreamWriter osw=new OutputStreamWriter(fos, "UTF-8");
        BufferedWriter  bw=new BufferedWriter(osw);
//簡寫如下：
//BufferedWriter writer = 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");
        }

//注意關閉的先後順序，先開啟的後關閉，後開啟的先關閉
        bw.close();
        osw.close();
        fos.close();
    }