假如E:/phsftp/evdokey目錄下有個evdokey_201103221556.txt文件，
現在對evdokey_201103221556.txt文件進行寫入或讀取操作，並解決寫入或讀取出現的亂碼問題。
文件內容如：
zhangsan,23,福建
lisi,30,上海
wangwu,43,北京
laolin,21,重慶
ximenqing,67,貴州
代碼如下：
/**
* 一行一行讀取文件，適合字符讀取，若讀取中文字符時會出現亂碼
*
* 流的關閉順序：先打開的後關，後打開的先關，
* 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();
}
/**
* 一行一行讀取文件，解決讀取中文字符時出現亂碼
*
* 流的關閉順序：先打開的後關，後打開的先關，
* 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();
}
/**
* 一行一行寫入文件，適合字符寫入，若寫入中文字符時會出現亂碼
*
* 流的關閉順序：先打開的後關，後打開的先關，
* 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"));
//寫入中文字符時會出現亂碼
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();
}
/**
* 一行一行寫入文件，解決寫入中文字符時出現亂碼
*
* 流的關閉順序：先打開的後關，後打開的先關，
* 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"
};
//寫入中文字符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，先打開的後關閉，後打開的先關閉
bw.close();
osw.close();
fos.close();
}
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