本文实例讲述了java计算文本md5加密值的方法。分享给大家供大家参考,具体如下:
java计算文本md5值,用于加密
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import java.security.messagedigest;
import java.security.nosuchalgorithmexception;
public class getmd5 {
public static void main(string[] args) {
string a= "123" ;
system.out.println(getmd5(a));
}
/**
* 获取文本字段的md5值
* @param txt
* @return
*/
public static string getmd5(string txt){
string rs = "" ;
string[] hexdigits = { "0" , "1" , "2" , "3" , "4" , "5" , "6" , "7" , "8" , "9" , "a" , "b" , "c" , "d" , "e" , "f" };
try {
messagedigest messagedigest = messagedigest.getinstance( "md5" );
byte [] b = messagedigest.digest(txt.getbytes());
stringbuffer resultsb = new stringbuffer();
for ( int i = 0 ; i < b.length; i++) {
int n = b[i];
if (n < 0 )
n = 256 + n;
int d1 = n / 16 ;
int d2 = n % 16 ;
resultsb.append(hexdigits[d1] + hexdigits[d2]);
}
rs = resultsb.tostring();
} catch (nosuchalgorithmexception e) {
e.printstacktrace();
}
return rs;
}
}
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输出值:
202cb962ac59075b964b07152d234b70
ps:关于加密解密感兴趣的朋友还可以参考本站在线工具:
文字在线加密解密工具(包含aes、des、rc4等):https://tool.zzvips.com/t/txt_encode/
md5在线加密工具:https://tool.zzvips.com/t/md5/
在线sha1/sha224/sha256/sha384/sha512加密工具:https://tool.zzvips.com/t/sha/
希望本文所述对大家java程序设计有所帮助。
原文链接:https://blog.csdn.net/u013183865/article/details/50595746