文件读写的实用工具（java实现）

来源：互联网发布：剑雨逍遥坐骑进阶数据编辑：程序博客网时间：2024/05/23 19:13

一，将文件读取到字符串（文件不能太大）

package com.util;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
/**
* @author Robin
* @date 2016年5月17日上午9:17:28
* @version 1.0
*/
public class ReadTxtFromFile {
public static String readTXT(String fileName) {
StringBuilder sb = new StringBuilder();
try {
BufferedReader in = new BufferedReader(new FileReader(new File(
fileName).getAbsoluteFile()));
try {
String s;
while ((s = in.readLine()) != null) {
sb.append(s);
sb.append("\n");
}
} finally {
in.close();
}
} catch (IOException e) {
throw new RuntimeException(e);
}
return sb.toString();
}

public static String readTXT_File(File file) {
StringBuilder sb = new StringBuilder();
try {
BufferedReader in = new BufferedReader(new FileReader(
file.getAbsoluteFile()));
try {
String s;
while ((s = in.readLine()) != null) {
sb.append(s);
sb.append("\n");
}
} finally {
in.close();
}
} catch (IOException e) {
throw new RuntimeException(e);
}
return sb.toString();
}

}

二，将字符串写入到文件

package com.util;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
/**
* @author Robin
* @date 2016年5月17日上午10:36:50
* @version 1.0
*/
public class SaveTxtToFile {
public static void write(String text, String filePath) {
try {
PrintWriter out = new PrintWriter(
new File(filePath).getAbsoluteFile());
try {
out.print(text);
} finally {
out.close();
}
} catch (IOException e) {
throw new RuntimeException(e);
}
}
}

参考《java编程思想》

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