package com.whyc.util;
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import org.apache.tomcat.util.codec.binary.Base64;
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import java.io.*;
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public class FileCopyUtil {
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/**
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* base64转File
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* @param base64
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* @param dest
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*/
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public static boolean base64ToFile(String base64, File dest) {
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BufferedInputStream bis = null;
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BufferedOutputStream bos = null;
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try {
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//由于base64在传输过程中，+和/和=会被替换所以在解码前需要将base64还原成可用的base64
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base64 = base64.replaceAll(" ","+");
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base64 = base64.replaceAll("%2F","/");
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base64 = base64.replaceAll("%3D","=");
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//当使用springMVC时无需使用以上方法进行还原
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byte[] bytes = Base64.decodeBase64(base64.replace("\r\n", ""));
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bis = new BufferedInputStream(new ByteArrayInputStream(bytes));
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bos = new BufferedOutputStream(new FileOutputStream(dest));
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byte[] bts = new byte[1024];
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int len = -1;
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while((len = bis.read(bts)) != -1) {
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bos.write(bts,0,len);
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}
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return true;
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} catch (Exception e) {
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e.printStackTrace();
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return false;
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} finally {
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if (bos != null) {
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try {
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bos.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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if (bis != null) {
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try {
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bis.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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}
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}
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