Java 读取文件 MD5 sha1 sha256 sha224 sha384 sha512

谁借莪１个温暖的怀抱￠ 2023-07-11 11:12 21阅读 0赞

在Java中读取文件的MD5或SHA码，用于对文件完整性进行校验，示例代码较为简单，如下：  
一、使用到的 jar （pom.xml）

<dependency>
        <groupId>commons-codec</groupId>
        <artifactId>commons-codec</artifactId>
        <version>1.14</version>
    </dependency>

二、代码示例

import java.io.File;
    import java.io.FileInputStream;
    import java.io.FileNotFoundException;
    import java.io.IOException;
    
    import org.apache.commons.codec.digest.DigestUtils;
    import org.apache.commons.codec.digest.MessageDigestAlgorithms;
    
    public class TestSHA {
    
    	    public static String getSHA1(String filePath) {
    	        try {
    				File file = new File(filePath);
    				FileInputStream fileInputStream = new FileInputStream(file);
    				String hex = DigestUtils.sha1Hex(fileInputStream);
    				return hex;
    			} catch (FileNotFoundException e) {
    				e.printStackTrace();
    			} catch (IOException e) {
    				e.printStackTrace();
    			}
    	        return null;
    	    }
    	    
    	    public static String getSHA(String filePath, String messageDigestAlgorithms) {
    	    	String hex = null;
    			try {
    				File file = new File(filePath);
    				hex = new DigestUtils(messageDigestAlgorithms).digestAsHex(file);
    			} catch (IOException e) {
    				e.printStackTrace();
    			}
    			return hex;
    	    }
    	    
    	    public static void main(String[] args) {
    //	    	MessageDigestAlgorithms.SHA_1
    	    	String filePath = "D:\\apache\\apache-maven\\repository\\commons-lang\\commons-lang\\2.6\\commons-lang-2.6.jar";// 0ce1edb914c94ebc388f086c6827e8bdeec71ac2
    	    	System.out.println(getSHA1(filePath));
    	    	System.out.println(getSHA(filePath, MessageDigestAlgorithms.SHA_1));
    		}
    	    
    }

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