Base64Encoder cannot be resolved

Question

This is my Java code in a JSP file. I am getting

Base64Encoder cannot be resolved.

Why is it so? I have to add something relat

Answer 1

Looks like you are using a class that does not exist in a jar you have included in the web application. Can you try the following? Make adjustments if necessary, I am just looking at the documentation for commons and typing this out --

1. Go to http://commons.apache.org/codec/index.html and read through the information there
2. Now go to http://commons.apache.org/codec/download_codec.cgi and download the zip file
3. Extract out the jar file and copy it to the lib directory of your web application
4. Replace the line [String encoding = Base64Encoder.encode ("test:test");]

with

String encoding = new String(
 org.apache.commons.codec.binary.Base64.encodeBase64   
    (org.apache.commons.codec.binary.StringUtils.getBytesUtf8("test:test"))
  );

Answer 2

I suspect you're not using a standalone JRE instead of the one included in the JDK.

1. Right click your project and click "Build Path" -> "Configure Build Path"
2. Under "Libraries", click on the existing JRE and then click "Remove"
3. Click "Add Library" -> "JRE System Library" -> "Finish"

The class should now resolve.

Answer 3

You may need to do an import or specify the fully qualified class name for Base64Encoder

Answer 4

I don't see an inclusion of the namespace here for Base64Encoder. Try adding 'com.oreilly.servlet' to your import.