java.lang.NoClassDefFoundError: org/apache/tomcat/util/codec/binary/Base64

用POI在处理Excel，涉及到图片的处理，使用到了Base64

import org.apache.tomcat.util.codec.binary.Base64;

Base64 base64 = new Base64();
byte[] imgByte = base64.decode(picString.substring("data:image/jpeg;base64,".length()));

tomcat7.0.23就报错了。换tomcat的tomcat-util.jar也不行。。

java.lang.NoClassDefFoundError: org/apache/tomcat/util/codec/binary/Base64
	com.trechina.servelet.excel.doGet(excel.java:56)
	com.trechina.servelet.excel.doPost(excel.java:117)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:722)

解决方案：

抛弃这个java包，O(∩_∩)O哈哈~

import org.apache.commons.codec.binary.Base64;

byte[] imgByte = Base64.decodeBase64(picString.substring("data:image/jpeg;base64,".length()).getBytes());