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Java Base64 加密/解密

Base64常用来表示字串加密过后的内容,使用Java程式语言来实作Base64的编码与解码功能1.在Java上做Base64的编码与解码,会使用到JDK里sun.misc套件下的BASE64Encoder和BASE64Decoder这两个类别,代码如下2.ApacheCommonsCodec有提供Base64的编码与...
代码星球 ·2021-02-15

Java base64 图片编码转换

packagecom.test;importorg.junit.Test;importsun.misc.BASE64Decoder;importsun.misc.BASE64Encoder;importjava.io.*;/***BASE64*/publicclassBase64Test{@Testpublicvoid...

java byte[]和base64互相转换

 1.方式一importjava.io.UnsupportedEncodingException;importjava.util.Base64;//byte[]转base64Stringbase64Str=Base64.getEncoder().encodeToString(byteArray);//base...

base64和Blob互相转换

 1.base64转blob(二进制数据)/***将以base64的图片url数据转换为Blob*@paramurlData用url方式表示的base64图片数据*/functionconvertBase64UrlToBlob(urlData){vararr=urlData.split(','),mime=a...
代码星球 ·2021-02-14

js 将图片文件转换成base64

 1.情景展示  在JavaScript中,如何使用图片文件转换成base64?2.解决方案/***网络图像文件转Base64*@paramimgdom对象*/functiongetBase64Image(img){varcanvas=document.createElement("canvas");canv...

password学3——Java BASE64加密解密

Base64是网络上最常见的用于传输8Bit字节代码的编码方式之中的一个,大家能够查看RFC2045~RFC2049。上面有MIME的具体规范。Base64编码可用于在HTTP环境下传递较长的标识信息。比如,在JavaPersistence系统Hibernate中,就採用了Base64来将一个较长的唯一标识符(一般为1...

Python模块——HashLib(摘要算法)与base64

摘要算法(hashlib)Python的hashlib提供了常见的摘要算法,如MD5,SHA1等等。什么是摘要算法呢?摘要算法又称哈希算法、散列算法。它通过一个函数,把任意长度的数据转换为一个长度固定的数据串(通常用16进制的字符串表示)你写了一篇文章,内容是一个字符串'howtousepythonhashlib-by...

java 图片Base64字符串转图片二进制数组

  publicstaticbyte[]base64ToImgByteArray(Stringbase64)throwsIOException{sun.misc.BASE64Decoderdecoder=newsun.misc.BASE64Decoder();//因为参数base64来源不一样,需要将附件数据替换清空掉...

ie6-ie8不支持opacity,rgba解决方法

半透明部分设置样式:opacity:0.7在ie9/ie10/ff/chrome/opera/safari显示正常。但是这样在ie6-ie8中是不支持的,需要加上下面这句话:filter:progid:DXImageTransform.Microsoft.Alpha(opacity=70); 这里的opaci...

e620. Activating a Keystroke When Any Component in the Window Has Focus

Normally,akeystrokeregisteredtoacomponentisactivatedwhenthecomponenthasthefocus.ThistypeofactivationconditioniscalledWHEN_FOCUSED.Itispossibletospecifythatakeys...

e618. Validating a JTextField When Permanently Losing the Focus

Thisexampledemonstratesatextfieldthatvalidatesitscontentswhenitreceivesapermanentfocus-lostevent.Ifthecontentsareinvalid,itdisplaysamodaldialogwithanerrormessag...

e616. Determining If a Focus Lost Is Temporary or Permanent

Atemporaryfocus-losteventoccursifthefocusmovestoanotherwindow.It'stemporarybecausethecomponentwillgainthefocuswhenitswindowbecomesactiveagain.Apermanentfocus-lo...

e617. Determining the Opposite Component of a Focus Event

Theoppositecomponentistheothercomponentaffectedinafocusevent.Specifically,inafocus-lostevent,theoppositecomponentistheonegainingthefocus.Inafocus-gainevent,theo...

e613. Modifying the Focus Traversal Order

JFrameframe=newJFrame();JButtoncomponent1=newJButton("1");JButtoncomponent2=newJButton("2");JButtoncomponent3=newJButton("3");//Bydefault,thefocustraversalorder...

e614. Setting the Initial Focused Component in a Window

Thereisnostraightforwardwaytosettheinitialfocusedcomponentinawindow.Thetypicalmethodistoaddawindowlistenertolistenforthewindowopenedeventandthenmakethedesiredco...
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