base64码 java_工具类：Java将图片变成base64码

一个可以将图片转成base64编码的工具类/**

*Copyright(c)-,玛雅牛(myaniuATgmaildotcom).

*

*LicensedundertheApacheLicense,Version2.0(the"License");

*youmaynotusethisfileexceptincompliancewiththeLicense.

*YoumayobtainacopyoftheLicenseat

*

*/licenses/LICENSE-2.0

*

*Unlessrequiredbyapplicablelaworagreedtoinwriting,software

*distributedundertheLicenseisdistributedonan"ASIS"BASIS,

*WITHOUTWARRANTIESORCONDITIONSOFANYKIND,eitherexpressorimplied.

*SeetheLicenseforthespecificlanguagegoverningpermissionsand

*limitationsundertheLicense.

*/

packagecom.jfinal.kit;

importjava.awt.image.BufferedImage;

importjava.io.ByteArrayOutputStream;

importjava.io.File;

importjava.io.IOException;

importjavax.imageio.ImageIO;

publicclassImageKit{

privateImageKit(){

}

/**

*生成形如data:image/jpeg;base64,iVBORw0KGgoA……的字符串，将图片文件DataURI化

*

*@paramimageFilePath图片文件路径

*@return形如data:image/jpeg;base64,iVBORw0KGgoA……的字符串

*@throwsIOException

*/

publicstaticStringencodeDataUri(StringimageFilePath)throwsIOException{

returnencodeDataUri(newFile(imageFilePath));

}

/**

*生成形如data:image/jpeg;base64,iVBORw0KGgoA……的字符串，将图片文件DataURI化

*

*@paramimageFile图片文件对象

*@return形如data:image/jpeg;base64,iVBORw0KGgoA……的字符串

*@throwsIOException

*/

publicstaticStringencodeDataUri(FileimageFile)throwsIOException{

Stringtype=FileKit.getFileExtension(imageFile).toLowerCase();

if("jpg".equals(type)){

type="jpeg";

}

return"data:image/"+type+";base64,"+encodeBase64(imageFile);

}

/**

*将文件编码成base64格式

*

*@paramimageFilePath图片文件路径

*@returnbase64编码格式的字符串

*@throwsIOException

*/

publicstaticStringencodeBase64(StringimageFilePath)throwsIOException{

returnencodeBase64(newFile(imageFilePath));

}

/**

*将文件编码成base64格式

*

*@paramimageFile图片文件对象

*@returnbase64编码格式的字符串

*@throwsIOException

*/

publicstaticStringencodeBase64(FileimageFile)throwsIOException{

BufferedImagebi=ImageIO.read(imageFile);

Stringtype=FileKit.getFileExtension(imageFile).toLowerCase();

ByteArrayOutputStreambaos=newByteArrayOutputStream();

ImageIO.write(bi,type,baos);

returnBase64Kit.encode(baos.toByteArray());

}

}