Java笔记--java逐行写入或读取数据

/**
* 逐行读取文件，适合字符读取。如果读取汉字就会出现乱码
*
* 直播关闭顺序：先开的后关，后开的先关，
* 否则可能会出现java.io.IOException: Stream closeed异常
*
* @抛出IOException
*/
@测试
public void readFile01() 抛出 IOException {
FileReader fr=new FileReader("E:/phsftp/evdokey/evdokey_201103221556.txt");
BufferedReader br=new BufferedReader(fr);
字符串行=“”;
String[] arrs=null;
while ((line=br.readLine())!=null) {
arrs=line.split(",");
System.out.println(arrs[0] + " : " + arrs[1] + ": " + arrs[2]);
}
br.close();
fr.close();
} /**
* 逐行读取文件，解决读取汉字时出现乱码的问题
*
* 直播关闭顺序：先开的后关，后开的先关，
* 否则可能会出现java.io.IOException: Stream closeed异常
*
* @抛出IOException
*/
@测试
public void readFile02() 抛出 IOException {
FileInputStream fis=new FileInputStream("E:/phsftp/evdokey/evdokey_201103221556.txt");
InputStreamReader isr=new InputStreamReader(fis, "UTF-8");
BufferedReader br = new BufferedReader(isr);
//缩写如下
//BufferedReader br = new BufferedReader(new InputStreamReader(
)// new FileInputStream("E:/phsftp/evdokey/evdokey_201103221556.txt"), "UTF-8"));
字符串行=“”;
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();
} /**
* 逐行写入文件，适合写入字符。如果写汉字就会出现乱码
*
* 直播关闭顺序：先开的后关，后开的先关，
* 否则可能会出现java.io.IOException: Stream closeed异常
*
* @抛出IOException
*/
@测试
public void writeFile01() 抛出 IOException {
String[] arrs={
"张三，23，福建",
“丽丝，30，上海”，
"王五，43，北京",
"老林,21,重庆",
“西门庆，67，贵州”
};
FileWriter fw=new FileWriter(new File("E:/phsftp/evdokey/evdokey_201103221556.txt"));
//写汉字时会出现乱码
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(字符串 arr:arrs){
bw.write(arr+"\t\n");
}
bw.close();
fw.close();
} /**
* 逐行写入文件，解决写入汉字时出现乱码的问题
*
* 直播关闭顺序：先开的后关，后开的先关，
* 否则可能会出现java.io.IOException: Stream closeed异常
*
* @抛出IOException
*/
@测试
public void writeFile02() 抛出 IOException {
String[] arrs={
"张三，23，福建",
“丽丝，30，上海”，
"王五，43，北京",
"老林,21,重庆",
“西门庆，67，贵州”
};
//解决书写汉字时出现中文乱码的问题
FileOutputStream fos=new FileOutputStream(new File("E:/phsftp/evdokey/evdokey_201103221556.txt"));
OutputStreamWriter osw=new OutputStreamWriter(fos, "UTF-8");
BufferedWriter bw=new BufferedWriter(osw);
//缩写如下：
//BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(
) // new FileOutputStream(new File("E:/phsftp/evdokey/evdokey_201103221556.txt")), "UTF-8")); for(字符串 arr:arrs){
bw.write(arr+"\t\n");
} //注意关闭顺序，先开后关，后开先关
bw.close();
osw.close();
fos.close();
}

　注：以下三行代码