java 读取文件内容 java读取文件内容转换为String

Java读取文件转String

Java读取文件转String

自己总结的Java读取文件转String的两种方法。

方法一

FileUtils的依赖
	<dependency>
        <groupId>commons-io</groupId>
        <artifactId>commons-io</artifactId>
        <version>2.6</version>
    </dependency>
    
	// 文件的路径
	String src = "D:\\VsCode\\11.18\\anputest.js";
    File file = new File(src);
    String js = FileUtils.readFileToString(file, "utf-8");

方法二

String src = "D:\\VsCode\\11.18\\anputest.js";
	File file = new File(src);
    FileReader fileReader = new FileReader(file);
    BufferedReader br = new BufferedReader(fileReader);
    StringBuilder sb = new StringBuilder();
    String temp = "";
    while ((temp = br.readLine()) != null) {
    	// 拼接换行符
      sb.append(temp + "\n");
    }
    br.close();
    String js = sb.toString();

实例

package com.example.test;

import org.apache.commons.io.FileUtils;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;

public class TestReadFile {
    public static void main(String[] args) throws Exception {
        test1();
        //test2();
    }

    public static void test1() throws Exception {
        String src = "D:\\VsCode\\11.18\\anputest.js";
        File file = new File(src);
        String text = FileUtils.readFileToString(file, "utf-8");
        System.out.println(text);
    }

    public static void test2() throws Exception {
        String src = "D:\\VsCode\\11.18\\anputest.js";
        File file = new File(src);
        FileReader fileReader = new FileReader(file);
        BufferedReader bufferedReader = new BufferedReader(fileReader);
        StringBuilder stringBuilder = new StringBuilder();
        String temp = "";
        while ((temp = bufferedReader.readLine()) != null) {
            stringBuilder.append(temp + "\n");
        }
        bufferedReader.close();
        String text = stringBuilder.toString();
        System.out.println(text);
    }
}