{"id":170,"date":"2020-07-27T01:18:07","date_gmt":"2020-07-26T17:18:07","guid":{"rendered":"http:\/\/121.89.208.222\/?p=135"},"modified":"2020-12-10T14:23:35","modified_gmt":"2020-12-10T06:23:35","slug":"java%e9%80%9a%e8%bf%87%e5%8f%8d%e5%b0%84%e8%8e%b7%e6%96%b9%e6%b3%95%e7%9a%84%e8%bf%94%e5%9b%9e%e5%80%bc%e7%9a%84%e7%b1%bb%e5%9e%8b%e4%bb%a5%e5%8f%8a%e5%8f%82%e6%95%b0%e5%8c%96%e7%9a%84%e5%ae%9e","status":"publish","type":"post","link":"http:\/\/moyisuiying.com\/index.php\/javastudy\/170.html","title":{"rendered":"Java\u901a\u8fc7\u53cd\u5c04\u83b7\u53d6\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u7684\u7c7b\u578b\u4ee5\u53ca\u53c2\u6570\u5316\u7684\u5b9e\u9645\u7c7b\u578b\uff08\u4e0a\u7bc7\uff09"},"content":{"rendered":"\n

\u6700\u8fd1\u5728\u5b66mybatis\u7684\u65f6\u5019\uff0c\u81ea\u5df1\u6839\u636e\u53c2\u8003\u8d44\u6599\u81ea\u5b9a\u4e49\u4e86\u4e00\u4e2a\u7b80\u5355\u7684mybatis\u6846\u67b6\uff0c\u671f\u671b\u80fd\u591f\u7b80\u5355\u5b9e\u73b0\u5bf9\u6570\u636e\u5e93\u64cd\u4f5c\u7684\u589e\u5220\u67e5\u6539\u529f\u80fd\u3002\u5728\u81ea\u5b9a\u4e49mybatis\u6846\u67b6\u7684\u8fc7\u7a0b\u4e2d\uff0c\u5728\u4f7f\u7528\u6ce8\u89e3\u6765\u8fdb\u884c\u914d\u7f6esql\u8bed\u53e5\u65f6\uff0c\u5c31\u9047\u5230\u4e86\u4e00\u4e9b\u5173\u4e8e\u83b7\u53d6\u8fd4\u56de\u503c\u7c7b\u578b\u7684\u5c0f\u95ee\u9898\u3002\u6bd4\u5982\u8bf4\u65b9\u6cd5 publIc User getOne(int id);\u7684\u8fd4\u56de\u503c\u7c7b\u578b\u662fUser\uff1bpublic List< User > getAll();\u7684\u8fd4\u56de\u503c\u7c7b\u578b\u662fList< User >,\u4f46\u662f\u6211\u4eec\u5728\u8fdb\u884cmybatis\u6846\u67b6\u4e66\u7684\u65f6\u5019\uff0c\u901a\u8fc7\u6ce8\u89e3\u914d\u7f6e\u65f6\uff0c\u6211\u4eec\u83b7\u53d6\u7684\u8fd4\u56de\u503c\u7c7b\u578b\u9700\u8981\u83b7\u53d6\u7684\u662f\u5b9e\u4f53\u7c7b\u7684\u5168\u9650\u5b9a\u7c7b\u540d\uff0c\u4e5f\u5373\u662f\u6211\u4eec\u5b9e\u9645\u4e0a\u9700\u8981\u83b7\u53d6\u7684\u662f List< User >\u4e2d\u7684\u5b9e\u4f53\u7c7bUser\u5373\u53ef\u3002\u5728\u6211\u4eec\u5b9e\u9645\u7684\u5e94\u7528\u4e2d\uff0c\u4e3a\u4e86\u4fbf\u4e8e\u4ee3\u7801\u7684\u901a\u7528\u6027\u4ee5\u53ca\u590d\u7528\u6027\uff0c\u6211\u4eec\u4e60\u60ef\u4f7f\u7528\u6cdb\u578b\uff0c\u6bd4\u5982public List< T> getAll()\u548cpublic Map getAll();\u8fd9\u4e24\u4e2a\u65b9\u6cd5\uff0c\u5c31\u662f\u4f7f\u7528\u4e86\u6cdb\u578b\uff0c\u662f\u4ee3\u7801\u66f4\u52a0\u901a\u7528\u3002\u90a3\u4e48\u6211\u4eec\u9996\u5148\u6765\u4e86\u89e3\u4e00\u4e0b\u6cdb\u578b\u7684\u539f\u7406\uff1a
\u5b9a\u4e49\uff1a\u628a\u7c7b\u578b\u660e\u786e\u7684\u5de5\u4f5c\u63a8\u8fdf\u5230\u521b\u5efa\u5bf9\u8c61\u6216\u8c03\u7528\u65b9\u6cd5\u7684\u65f6\u5019\u624d\u53bb\u660e\u786e\u7684\u7279\u6b8a\u7684\u7c7b\u578b\u3002
Java\u6cdb\u578b\u8bbe\u8ba1\u539f\u5219:\u53ea\u8981\u5728\u7f16\u8bd1\u65f6\u671f\u6ca1\u6709\u51fa\u73b0\u8b66\u544a\uff0c\u90a3\u4e48\u8fd0\u884c\u65f6\u671f\u5c31\u4e0d\u4f1a\u51fa\u73b0ClassCastException\u5f02\u5e38.
\u53c2\u6570\u5316\u7c7b\u578b:\u628a\u7c7b\u578b\u5f53\u4f5c\u662f\u53c2\u6570\u2014\u6837\u4f20\u9012\uff1b<\u6570\u636e\u7c7b\u578b>\u53ea\u80fd\u662f\u5f15\u7528\u7c7b\u578b\u3002
\u76f8\u5173\u672f\u8bed:
List< E >\u4e2d\u7684E\u79f0\u4e3a\u7c7b\u578b\u53c2\u6570\u53d8\u91cf\u3002
List< Integer >\u4e2d\u7684Integer\u79f0\u4e3a\u5b9e\u9645\u7c7b\u578b\u53c2\u6570\u3002
\u6574\u4e2a\u79f0\u4e3aList< E >\u6cdb\u578b\u7c7b\u578b\u3002
\u6574\u4e2aList< Integer >\u79f0\u4e3a\u53c2\u6570\u5316\u7684\u7c7b\u578bParameterizedType\u3002<\/p>\n\n\n\n

\u4e0d\u8fc7\u4e5f\u5c31\u662f\u56e0\u4e3a\u4f7f\u7528\u4e86\u6cdb\u578b\uff0c\u5bfc\u81f4\u6211\u4eec\u5728\u901a\u8fc7\u53cd\u5c04\u83b7\u53d6\u8fd4\u56de\u503c\u4e86\u7c7b\u578b\u7684\u65f6\u5019\u4f1a\u66f4\u52a0\u9ebb\u70e6\u4e00\u4e9b\u3002\u4e3a\u4e86\u66f4\u52a0\u65b9\u4fbf\u5b66\u4e60\u901a\u8fc7\u53cd\u5c04\u83b7\u53d6\u8fd4\u56de\u503c\u7c7b\u578b\u4ee5\u53ca\u53c2\u6570\u5316\u7684\u5b9e\u9645\u53c2\u6570\u7c7b\u578b\uff0c\u6211\u7279\u610f\u5199\u4e86\u51e0\u4e2a\u5c0f\u6848\u4f8b\u8fdb\u884c\u6d4b\u8bd5\u8bb2\u89e3\u3002
1.\u9996\u5148\u521b\u5efa\u7528\u4e8e\u6d4b\u8bd5\u7684\u5404\u4e2a\u7c7b\uff0c\u5728\u8fd9\u4e9b\u7c7b\u4e2d\u6211\u4eec\u4e0d\u9700\u8981\u5199\u989d\u5916\u7684\u4ee3\u7801\u5b9e\u73b0\uff0c\u53ea\u662f\u7528\u4e8e\u6d4b\u8bd5\u83b7\u53d6\u8fd4\u56de\u503c\u7c7b\u578b\u5373\u53ef\u3002<\/p>\n\n\n\n

package dao;\n\nimport java.util.List;\n\nimport entity.User;\n\n\/**\n * @author \u964c\u610f\u968f\u5f71\n TODO :UserDao\u6d4b\u8bd5\u63a5\u53e3\n *2020\u5e747\u670826\u65e5  \u4e0b\u534810:58:04\n *\/\npublic interface UserDao {\n\n\/**\n * \u83b7\u53d6\u6240\u6709\u7528\u6237\n * @return \u8fd4\u56de\u6240\u6709\u7528\u6237\u7684\u96c6\u5408\n *\/\n    public List<User> getAll();\n\/**\n * \u901a\u8fc7\u6307\u5b9a\u7684id\u83b7\u53d6\u4e00\u4e2a\u7528\u6237\u5bf9\u8c61\n * @param id: \u6307\u5b9a\u7684id\n * @return \u8fd4\u56de\u4e00\u4e2aUser\n *\/\n    public User getOne(int id);\n\n}<\/code><\/pre>\n\n\n\n
package dao;\n\nimport java.util.Map;\n\n\/**\n * @author \u964c\u610f\u968f\u5f71\n TODO :\u5b66\u751fdao\u6d4b\u8bd5\u7c7b\n *2020\u5e747\u670826\u65e5  \u4e0b\u534811:02:10\n *\/\npublic interface StudentDao<T,V> {\n    \/**\n     * \u83b7\u53d6\u6240\u6709\u5bf9\u8c61\n     * @return \u8fd4\u56de\u4e00\u4e2amap\n     *\/\n    public Map<T,V> getAll();\n    \/**\n     * \u83b7\u53d6\u4e00\u4e2aT\u5bf9\u8c61\n     * @return \u8fd4\u56deT\n     *\/\n    public T getT();\n    \/**\n     * \u83b7\u53d6\u4e00\u4e2aV\u5bf9\u8c61\n     * @return \u8fd4\u56deV\n     *\/\n    public  V getV();\n\n}<\/code><\/pre>\n\n\n\n
package entity;\n\n\/**\n * @author \u964c\u610f\u968f\u5f71\n TODO :\u6d4b\u8bd5\u5b9e\u4f53\u7c7b\n *2020\u5e747\u670826\u65e5  \u4e0b\u534811:05:27\n *\/\npublic class Cat {\n\n}<\/code><\/pre>\n\n\n\n
package entity;\n\n\/**\n * @author \u964c\u610f\u968f\u5f71\n TODO :\u6d4b\u8bd5\u5b9e\u4f53\u7c7b\n *2020\u5e747\u670826\u65e5  \u4e0b\u534811:05:10\n *\/\npublic class Dog {\n\n}<\/code><\/pre>\n\n\n\n
package entity;\n\n\/**\n * @author \u964c\u610f\u968f\u5f71\n TODO :\u6d4b\u8bd5\u7528\u6237\u7c7b\n *2020\u5e747\u670826\u65e5  \u4e0b\u534810:59:22\n *\/\npublic class User {\n\n}<\/code><\/pre>\n\n\n\n
\u7136\u540e\u5efa\u7acb\u76f8\u5173\u7684\u6d4b\u8bd5\u7c7b\uff1a<\/p>\n\n\n\n
package test;\n\n\nimport org.junit.jupiter.api.Test;\n\nclass StudentDaoTest {\n\n    @Test\n    void testGetAll() {\n    }\n\n    @Test\n    void testGetT() {\n    }\n\n    @Test\n    void testGetV() {\n    }\n\n}<\/code><\/pre>\n\n\n\n
package test;\n\n\nimport org.junit.jupiter.api.Test;\n\nclass UserDaoTest {\n\n    @Test\n    void testGetAll() {\n\n    }\n\n    @Test\n    void testGetOne() {\n    }\n\n}<\/code><\/pre>\n\n\n\n
\u8fd9\u4e9b\u7c7b\u7684\u5177\u4f53\u76ee\u5f55\u7ed3\u6784\u4e3a\uff1a
\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"
<\/p >\n
2.\u5efa\u7acb\u6d4b\u8bd5\u7c7b\u8fdb\u884c\u6d4b\u8bd5<\/strong><\/p>\n\n\n\n
2.1\u9996\u5148\u6d4b\u8bd5UserDao\u63a5\u53e3<\/strong><\/p>\n\n\n\n
package test;\n\n\nimport java.lang.reflect.Method;\nimport java.lang.reflect.ParameterizedType;\nimport java.lang.reflect.Type;\nimport org.junit.jupiter.api.Test;\n\nclass UserDaoTest {\n\n    @Test\n    void test() throws Exception {\n     \/\/\u6839\u636eUserDao\u63a5\u53e3\u7684\u5168\u9650\u5b9a\u7c7b\u540d\u901a\u8fc7\u53cd\u5c04\u83b7\u53d6\u8be5\u63a5\u53e3\u7684\u5b57\u8282\u7801\n    Class<?> userDaoClass = Class.forName(\"dao.UserDao\");\n    \/\/\u83b7\u53d6UserDao\u6240\u6709\u7684\u65b9\u6cd5\n    Method[] methods = userDaoClass.getMethods();\n    for(Method method: methods) {\n        \/\/\u83b7\u53d6\u65b9\u6cd5\u7684\u540d\u79f0\n        String methodName = method.getName();\n        \/\/\u5224\u65ad\u662f\u5426\u662fUserDao\u4e2d\u7684getAll()\u6216\u8005getOne(int id)\u65b9\u6cd5\uff0c\n        if(methodName.startsWith(\"get\")) {\n            \/\/\u8fd4\u56de\u4e00\u4e2aType\u5bf9\u8c61\uff0c\u8868\u793a\u7531\u8be5\u65b9\u6cd5\u5bf9\u8c61\u8868\u793a\u7684\u65b9\u6cd5\u7684\u6b63\u5f0f\u8fd4\u56de\u7c7b\u578b\u3002\n            \/\/\u6bd4\u5982public List<User> getAll();\u90a3\u4e48\u8fd4\u56de\u7684\u662fList<User>\n          Type genericReturnType = method.getGenericReturnType();\n          \/\/\u83b7\u53d6\u5b9e\u9645\u8fd4\u56de\u7684\u53c2\u6570\u540d\n          String returnTypeName = genericReturnType.getTypeName();\n          System.out.println(methodName+\"\u7684\u8fd4\u56de\u53c2\u6570\u662f\uff1a\"+returnTypeName);\n          \/\/\u5224\u65ad\u662f\u5426\u662f\u53c2\u6570\u5316\u7c7b\u578b\n          if(genericReturnType instanceof ParameterizedType) {\n              \/\/\u5982\u679c\u662f\u53c2\u6570\u5316\u7c7b\u578b,\u5219\u5f3a\u8f6c\n              ParameterizedType parameterizedType = (ParameterizedType) genericReturnType;\n            \/\/\u83b7\u53d6\u5b9e\u9645\u53c2\u6570\u7c7b\u578b\u6570\u7ec4\uff0c\u6bd4\u5982List<User>\uff0c\u5219\u83b7\u53d6\u7684\u662f\u6570\u7ec4[User]\uff0cMap<User,String> \u5219\u83b7\u53d6\u7684\u662f\u6570\u7ec4[User,String]\n              Type[] actualTypeArguments = parameterizedType.getActualTypeArguments();\n              for(Type type:actualTypeArguments) {\n                  \/\/\u5f3a\u8f6c\n                  Class<?> actualTypeArgument = (Class<?>) type;\n                 \/\/\u83b7\u53d6\u5b9e\u9645\u53c2\u6570\u7684\u7c7b\u540d\n                  String name = actualTypeArgument.getName();\n                  System.out.println(methodName+\"\u7684\u8fd4\u56de\u503c\u7c7b\u578b\u662f\u53c2\u6570\u5316\u7c7b\u578b\uff0c\u5176\u7c7b\u578b\u4e3a\uff1a\"+name);\n              }\n\n          }else {\n              \/\/\u4e0d\u662f\u53c2\u6570\u5316\u7c7b\u578b,\u76f4\u63a5\u83b7\u53d6\u8fd4\u56de\u503c\u7c7b\u578b\n              Class<?> returnType = method.getReturnType();\n              \/\/\u83b7\u53d6\u8fd4\u56de\u503c\u7c7b\u578b\u7684\u7c7b\u540d\n              String name = returnType.getName();\n              System.out.println(methodName+\"\u7684\u8fd4\u56de\u503c\u7c7b\u578b\u4e0d\u662f\u53c2\u6570\u5316\u7c7b\u578b\u5176\u7c7b\u578b\u4e3a\uff1a\"+name);\n\n          }\n\n        }\n\n\n    }\n    }\n\n\n}<\/code><\/pre>\n\n\n\n
\u4ece\u8be5\u6d4b\u8bd5\u7c7b\u4e2d\u6211\u4eec\u53ef\u4ee5\u770b\u5230\uff0c\u6211\u4eec\u9996\u5148\u83b7\u53d6\u5bf9\u5e94\u7684\u65b9\u6cd5\u540e\uff0c\u4f7f\u7528<\/p>\n\n\n\n
\/\/\u6bd4\u5982public List<User> getAll();\u90a3\u4e48\u8fd4\u56de\u7684\u662fList<User>\nType genericReturnType = method.getGenericReturnType();<\/code><\/pre>\n\n\n\n
\u6765\u83b7\u53d6\u65b9\u6cd5\u7684\u6b63\u5f0f\u8fd4\u56de\u7c7b\u578b\uff0c\u6bd4\u5982public List< User > getAll();\u90a3\u4e48\u8fd4\u56de\u7684\u662fList< User >\uff0cpublic Map< String,User> getAll();\u90a3\u4e48\u8fd4\u56de\u7684\u662fMap< String,User>;\uff0c\u7136\u540e\u5224\u65ad\u662f\u5426\u662f\u53c2\u6570\u5316\u7c7b\u578b\uff0c\u5728\u8fd9\u91cc\u591a\u8bf4\u4e00\u53e5\uff0c\u5176\u5b9e\u53c2\u6570\u5316\u7c7b\u578b\u5c31\u662f\u6211\u4eec\u5e38\u89c1\u7684List< User >,Map< String,Integer>\u7b49\u8fd9\u4e9b < > \u4e2d\u7684\u53c2\u6570\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u662f\u5426\u6709< >\u6765\u5224\u65ad\u662f\u4e0d\u662f\u53c2\u6570\u5316\u3002\u5f53\u6211\u4eec\u77e5\u9053\u662f\u53c2\u6570\u5316\u7c7b\u578b\u540e\uff0c\u9700\u8981\u8fdb\u884c\u5f3a\u8f6c\uff1a<\/p>\n\n\n\n
 ParameterizedType parameterizedType = (ParameterizedType) genericReturnType;<\/code><\/pre>\n\n\n\n
2.2\u4e0b\u9762\u6211\u4eec\u5f00\u59cb\u5bf9ParameterizedType\u8fdb\u884c\u89e3\u6790\uff1a<\/strong><\/p>\n\n\n\n
public interface ParameterizedType extends Type {\n    Type[] getActualTypeArguments();\n\n    Type getRawType();\n\n    Type getOwnerType();\n}<\/code><\/pre>\n\n\n\n
2.2.1 Type[] getActualTypeArguments\u200b()\uff1a\u8fd4\u56de\u4e00\u4e2aType\u5bf9\u8c61\u7684\u6570\u7ec4\uff0c\u8868\u793a\u6b64\u7c7b\u578b\u7684\u5b9e\u9645\u7c7b\u578b\u53c2\u6570\u3002
\u8bf7\u6ce8\u610f\uff0c\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u8fd4\u56de\u7684\u6570\u7ec4\u4e3a\u7a7a\u3002 \u5982\u679c\u6b64\u7c7b\u578b\u8868\u793a\u5d4c\u5957\u5728\u53c2\u6570\u5316\u7c7b\u578b\u4e2d\u7684\u975e\u53c2\u6570\u5316\u7c7b\u578b\uff0c\u5219\u53ef\u80fd\u4f1a\u53d1\u751f\u8fd9\u79cd\u60c5\u51b5\u3002
\u7ed3\u679c\uff1a\u4e00\u4e2a Type\u5bf9\u8c61\u7684\u6570\u7ec4\uff0c\u8868\u793a\u6b64\u7c7b\u578b\u7684\u5b9e\u9645\u7c7b\u578b\u53c2\u6570\u3002
2.2.2 Type getRawType\u200b()\uff1a\u8fd4\u56de\u8868\u793a\u6b64\u7c7b\u578b\u7684\u7c7b\u6216\u63a5\u53e3\u7684 Type\u5bf9\u8c61\u3002
\u7ed3\u679c \uff1a\u8868\u793a\u58f0\u660e\u6b64\u7c7b\u578b\u7684\u7c7b\u6216\u63a5\u53e3\u7684 Type\u5bf9\u8c61 \u3002
2.2.3Type getOwnerType()\uff1a\u8fd4\u56de\u8868\u793a\u6b64\u7c7b\u578bType\u6210\u5458\u7684\u7c7b\u578b\u7684Type\u5bf9\u8c61\u3002 \u4f8b\u5982\uff0c\u5982\u679c\u8be5\u7c7b\u578b\u662fO< T >.I < S > \uff0c\u8fd4\u56de\u7684\u8868\u793aO< T > \u3002
\u5982\u679c\u6b64\u7c7b\u578b\u662f\u9876\u7ea7\u7c7b\u578b\uff0c\u5219\u8fd4\u56denull \u3002
\u7ed3\u679c \uff1a\u8868\u793a\u6b64\u7c7b\u578bType\u6210\u5458\u7684\u7c7b\u578b\u7684Type\u5bf9\u8c61\u3002 \u5982\u679c\u6b64\u7c7b\u578b\u662f\u9876\u7ea7\u7c7b\u578b\uff0c\u5219\u8fd4\u56denull\u3002
2.3\u83b7\u53d6\u8fd4\u56de\u7c7b\u578b\u7684\u5b9e\u9645\u53c2\u6570\u6570\u7ec4\uff1a<\/p>\n\n\n\n
  Type[] actualTypeArguments = parameterizedType.getActualTypeArguments();<\/code><\/pre>\n\n\n\n
2.4\u5c06actualTypeArguments \u6bcf\u4e2aType\u5f3a\u8f6c\u4e3aClass\u540e\u83b7\u53d6\u5176\u65b9\u6cd5\u540d\uff0c\u4e5f\u5c31\u662f\u83b7\u53d6\u53c2\u6570\u7c7b\u578b\u7684\u5168\u9650\u5b9a\u7c7b\u540d\uff0c\u5982Map\u4e2d\u7684\u5b9e\u9645\u53c2\u6570\u6570\u7ec4actualTypeArguments ={User,Integer}\uff0c\u5176\u5168\u9650\u5b9a\u7c7b\u540d\u5bf9\u5e94\u4e3a{dao.User , java.lang.Integer }\u3002<\/p>\n\n\n\n
2.5\u5982\u679c\u4e0d\u662f\u53c2\u6570\u5316\u7c7b\u578b\u7684\u8bdd\uff0c\u53ef\u76f4\u63a5\u83b7\u53d6\u8fd4\u56de\u503c\u7c7b\u578b\u7136\u540e\u83b7\u53d6\u8fd4\u56de\u503c\u7c7b\u578b\u7684\u5168\u9650\u5b9a\u7c7b\u540d\uff1a<\/p>\n\n\n\n
 \/\/\u4e0d\u662f\u53c2\u6570\u5316\u7c7b\u578b,\u76f4\u63a5\u83b7\u53d6\u8fd4\u56de\u503c\u7c7b\u578b\n              Class<?> returnType = method.getReturnType();\n              \/\/\u83b7\u53d6\u8fd4\u56de\u503c\u7c7b\u578b\u7684\u7c7b\u540d\n              String name = returnType.getName();<\/code><\/pre>\n\n\n\n
2.6\u6d4b\u8bd5\u7684\u7ed3\u679c\u4e3a\uff1a<\/p>\n\n\n\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"
<\/p >\n
\u6211\u4eec\u53d1\u73b0 public List< User > getAll();\u7684\u8fd4\u56de\u503c\u7c7b\u578b\u662f\u53c2\u6570\u5316\u7c7b\u578b\uff0c\u4e3aList< User >\uff0c\u5176\u5168\u9650\u5b9a\u7c7b\u540d\u8868\u793a\u4e3a\uff1ajava.util.List
public User getOne(int id);\u7684\u8fd4\u56de\u503c\u7c7b\u578b\u4e3aUser \uff0c\u4e0d\u662f\u53c2\u6570\u5316\u7c7b\u578b\uff0c\u5176\u5168\u9650\u5b9a\u7c7b\u540d\u8868\u793a\u4e3a\uff1aentity.User\u3002
\u7531\u6b64\u6211\u4eec\u521d\u6b65\u61c2\u5f97\u4e86\u5982\u4f55\u83b7\u53d6\u7b80\u5355\u7684\u53c2\u6570\u5316\u7c7b\u578b\u7684\u8fd4\u56de\u503c\u3002\u90a3\u4e48\u5bf9\u4e8e\u66f4\u52a0\u590d\u6742\u7684\u6cdb\u578b\u7c7b\u7684\u5982Map\u7684\u5b9e\u9645\u53c2\u6570\u8be5\u600e\u4e48\u83b7\u53d6\u5462\uff1f\u6b32\u77e5\u540e\u4e8b\u5982\u4f55\u8bf7\u770b
Java\u901a\u8fc7\u53cd\u5c04\u83b7\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u7684\u7c7b\u578b\u4ee5\u53ca\u53c2\u6570\u5316\u7684\u5b9e\u9645\u7c7b\u578b\uff08\u4e0b\u7bc7\uff09\uff1a<\/p>\n\n\n\n
http:\/\/moyisuiying.com\/index.php\/javastudy\/152.html<\/a>\u3002<\/p>\n\n\n\n
<\/p>\n\n\n\n
\u88ab\u6d4b\u8bd5\u6587\u4ef6\u7684\u5177\u4f53\u4ee3\u7801\u5df2\u7ecf\u4e0a\u4f20\u5230\u4e2a\u4eba\u535a\u5ba2\u670d\u52a1\u5668\uff0c\u6709\u9700\u8981\u7684\u8bf7\u76f4\u63a5\u70b9\u51fb\u4e0b\u8f7d\uff0c\u89e3\u538b\u540e\u76f4\u63a5\u5bfc\u5165eclipse\u5373\u53ef\uff1ahttp:\/\/moyisuiying.com\/wp-content\/uploads\/2020\/07\/ReflectionAcquisitionGenerics.rar<\/a><\/p>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
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