java一行一行写入或读取数据

/**
* 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();
}

/**
* 一行一行写入文件，解决写入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 writeFile02() throws IOException {
String[] arrs={
"zhangsan,23,福建",
"lisi,30,上海",
"wangwu,43,北京",
"laolin,21,重庆",
"ximenqing,67,贵州"
};
//写入中文字符时解决中文乱码问题
FileOutputStream fos=new FileOutputStream(new File("E:/phsftp/evdokey/evdokey_201103221556.txt"));
OutputStreamWriter osw=new OutputStreamWriter(fos, "UTF-8");
BufferedWriter bw=new BufferedWriter(osw);
//简写如下：
//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");
}

//注意关闭的先后顺序，先打开的后关闭，后打开的先关闭
bw.close();
osw.close();
fos.close();
}