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。