package com.neo.utils;
import net.coobird.thumbnailator.Thumbnails;
import sun.misc.BASE64Decoder;
import java.io.*;
public class ImageUtil {
//base64加密
/**
* 图片转base64加密
* @param imgFile
* @return
*/
public static String imageToBase64Str(String imgFile) {
String strRet = "";
InputStream inputStream = null;
byte[] data = null;
try {
inputStream = new FileInputStream(imgFile);
data = new byte[inputStream.available()];
inputStream.read(data);
inputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
// 加密
org.apache.commons.codec.binary.Base64 encoder = new org.apache.commons.codec.binary.Base64();
strRet = encoder.encodeAsString(data);
return strRet;
}
/**
* @param imgStr base64编码字符串
* @param path 图片路径-具体到文件
* @return
* @Description: 将base64编码字符串转换为图片
* @Author:
* @CreateTime:
*/
public static boolean generateImage(String imgStr, String path) {
if(imgStr == null){
return false;
}
BASE64Decoder decoder = new BASE64Decoder();
try{
//解密
byte[] b = decoder.decodeBuffer(imgStr);
//处理数据
for (int i = 0;i<b.length;++i){
if(b[i]<0){
b[i]+=256;
}
}
OutputStream out = new FileOutputStream(path);
out.write(b);
out.flush();
out.close();
return true;
} catch (IOException e) {
e.printStackTrace();
return false;
}
}
/**
* 重新生成图片宽、高
* @param srcPath 图片路径
* @param destPath 新生成的图片路径
* @param newWigth 新的宽度
* @param newHeight 新的高度
* @param forceSize 是否强制使用指定宽、高,false:会保持原图片宽高比例约束
* @return
* @throws IOException
*/
public static boolean resizeImage (String srcPath, String destPath, int newWigth, int newHeight, boolean forceSize) throws IOException {
if (forceSize) {
try {
Thumbnails.of(srcPath).forceSize(newWigth, newHeight).toFile(destPath);
} catch (IOException e) {
e.printStackTrace();
}
} else {
Thumbnails.of(srcPath).width(newWigth).height(newHeight).toFile(destPath);
}
return true;
}
}
pom依赖
<!--base64-->
<dependency>
<groupId>net.coobird</groupId>
<artifactId>thumbnailator</artifactId>
<version>0.4.8</version>
</dependency>
<!-- https://mvnrepository.com/artifact/commons-io/commons-io -->
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.4</version>
</dependency>
<!-- https://mvnrepository.com/artifact/commons-codec/commons-codec -->
<dependency>
<groupId>commons-codec</groupId>
<artifactId>commons-codec</artifactId>
<version>1.10</version>
</dependency>
用于图片和base64之间的转换，已经重新设置调整base64的 大小
