java怎样读入一个文本文件保存到一个字符串
/**
* 以行为单位读取文件,常用于读面向行的格式化文件
*/
public static void readFileByLines(String fileName) {
File file = new File(fileName);
BufferedReader reader = null;
try {
System.out.println("以行为单位读取文件内容,一次读一整行:");
reader = new BufferedReader(new FileReader(file));
String tempString = null;
int line = 1;
// 一次读入一行,直到读入null为文件结束
while ((tempString = reader.readLine()) != null) {
// 显示行号
System.out.println("line " + line + ": " + tempString);
line++;
}
reader.close();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (reader != null) {
try {
reader.close();
} catch (IOException e1) {
}
}
}
}
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
public class FileTest1 {
public static void main(String[] args) throws IOException {
BufferedReader reader=new BufferedReader(new FileReader("test.txt"));
StringBuilder result=new StringBuilder();
String theLine=null;
while(( theLine=reader.readLine())!=null){
result.append(theLine+"\n");
}
System.out.println(result.toString());
}
}