使用shiro缓存用户身份信息的时候报：java.io.NotSerializableException: org.apache.shiro.util.SimpleByteSource

最近在使用shiro缓存用户的身份信息的时候，报了simpleByteSource不能序列化，跟进源码一看，原来这个类没有实现序列化的接口，但是我在缓存身份信息的实现又要用到这个类，解决方法：重写一个类，模仿着SimpleByteSoure这个类，写个自己的类。并且实现序列化接口即可·。

 package com.dzf.shiro;

 import org.apache.shiro.codec.Base64;
 import org.apache.shiro.codec.CodecSupport;
 import org.apache.shiro.codec.Hex;
 import org.apache.shiro.util.ByteSource;

 import java.io.Serializable;
 import java.util.Arrays;

 /**
  * <p>
  *     为了解决redis序列化的问题，SimpleByteSource没有实现序列化接口
  *     在传入simpleAuthenticationInfo()的时候，缓存用户信息会出现序列化异常
  * </p>
  * @author dingzf
  * @date 2018/3/7
  * @time 21:54
  */
 public class ShiroByteSource implements ByteSource, Serializable {
     private static final long serialVersionUID = -6814382603612799610L;
     private volatile byte[] bytes;
     private String cachedHex;
     private String cachedBase64;

     public ShiroByteSource() {

     }

     public ShiroByteSource(String string) {
         this.bytes = CodecSupport.toBytes(string);
     }

     public void setBytes(byte[] bytes) {
         this.bytes = bytes;
     }

     @Override
     public byte[] getBytes() {
         return this.bytes;
     }

     @Override
     public String toHex() {
         if ( this.cachedHex == null ) {
             this.cachedHex = Hex.encodeToString(getBytes());
         }
         return this.cachedHex;
     }

     @Override
     public String toBase64() {
         if ( this.cachedBase64 == null ) {
             this.cachedBase64 = Base64.encodeToString(getBytes());
         }
         return this.cachedBase64;
     }

     @Override
     public boolean isEmpty() {
         return this.bytes == null || this.bytes.length == 0;
     }

     @Override
     public String toString() {
         return toBase64();
     }

     @Override
     public int hashCode() {
         if (this.bytes == null || this.bytes.length == 0) {
             return 0;
         }
         return Arrays.hashCode(this.bytes);
     }

     @Override
     public boolean equals(Object o) {
         if (o == this) {
             return true;
         }
         if (o instanceof ByteSource) {
             ByteSource bs = (ByteSource) o;
             return Arrays.equals(getBytes(), bs.getBytes());
         }
         return false;
     }

     public static ByteSource of(String string) {
         return new ShiroByteSource(string);
     }
 }

在自己的实现的realm里面调用如下：

 SimpleAuthenticationInfo info = new SimpleAuthenticationInfo(user, user.getPassword(), new ShiroByteSource(user.getSalt()), getName());

以前的写法是：

 SimpleAuthenticationInfo info = new SimpleAuthenticationInfo(user, user.getPassword(), new SimpleByteSource(user.getSalt()), getName());

然后就可以解决问题了。