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·。

 1 package com.dzf.shiro;
 2 
 3 import org.apache.shiro.codec.Base64;
 4 import org.apache.shiro.codec.CodecSupport;
 5 import org.apache.shiro.codec.Hex;
 6 import org.apache.shiro.util.ByteSource;
 7 
 8 import java.io.Serializable;
 9 import java.util.Arrays;
10 
11 /**
12  * <p>
13  *     为了解决redis序列化的问题，SimpleByteSource没有实现序列化接口
14  *     在传入simpleAuthenticationInfo()的时候，缓存用户信息会出现序列化异常
15  * </p>
16  * @author dingzf
17  * @date 2018/3/7
18  * @time 21:54
19  */
20 public class ShiroByteSource implements ByteSource, Serializable {
21     private static final long serialVersionUID = -6814382603612799610L;
22     private volatile byte[] bytes;
23     private String cachedHex;
24     private String cachedBase64;
25 
26     public ShiroByteSource() {
27 
28     }
29 
30     public ShiroByteSource(String string) {
31         this.bytes = CodecSupport.toBytes(string);
32     }
33 
34     public void setBytes(byte[] bytes) {
35         this.bytes = bytes;
36     }
37 
38     @Override
39     public byte[] getBytes() {
40         return this.bytes;
41     }
42 
43     @Override
44     public String toHex() {
45         if ( this.cachedHex == null ) {
46             this.cachedHex = Hex.encodeToString(getBytes());
47         }
48         return this.cachedHex;
49     }
50 
51     @Override
52     public String toBase64() {
53         if ( this.cachedBase64 == null ) {
54             this.cachedBase64 = Base64.encodeToString(getBytes());
55         }
56         return this.cachedBase64;
57     }
58 
59     @Override
60     public boolean isEmpty() {
61         return this.bytes == null || this.bytes.length == 0;
62     }
63 
64     @Override
65     public String toString() {
66         return toBase64();
67     }
68 
69     @Override
70     public int hashCode() {
71         if (this.bytes == null || this.bytes.length == 0) {
72             return 0;
73         }
74         return Arrays.hashCode(this.bytes);
75     }
76 
77     @Override
78     public boolean equals(Object o) {
79         if (o == this) {
80             return true;
81         }
82         if (o instanceof ByteSource) {
83             ByteSource bs = (ByteSource) o;
84             return Arrays.equals(getBytes(), bs.getBytes());
85         }
86         return false;
87     }
88 
89     public static ByteSource of(String string) {
90         return new ShiroByteSource(string);
91     }
92 }

在自己的实现的realm里面调用如下：

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

以前的写法是：

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

然后就可以解决问题了。