diff --git a/docs/spring/cs6beef402-4155-11ee-995c-acde48001122.java b/docs/spring/cs6beef402-4155-11ee-995c-acde48001122.java
new file mode 100644
index 00000000..23207066
--- /dev/null
+++ b/docs/spring/cs6beef402-4155-11ee-995c-acde48001122.java
@@ -0,0 +1,37 @@
+/**
+ * Copyright 2009-2016 the original author or authors.
+ * <p>
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.ibatis.submitted.lazy_properties;
+
+import org.apache.ibatis.annotations.ResultMap;
+import org.apache.ibatis.annotations.Select;
+
+import java.util.List;
+
+public interface Mapper {
+    User getUser(Integer id);
+
+    @ResultMap("user")
+    @Select("select 11 id, 'lazy1' name from (values(0))")
+    User getLazy1();
+
+    @ResultMap("user")
+    @Select("select 12 id, 'lazy2' name from (values(0))")
+    User getLazy2();
+
+    @ResultMap("user")
+    @Select("select 13 id, 'lazy3' name from (values(0))")
+    List<User> getLazy3();
+}
diff --git a/docs/spring/cs6c39b41a-4155-11ee-995c-acde48001122.java b/docs/spring/cs6c39b41a-4155-11ee-995c-acde48001122.java
new file mode 100644
index 00000000..aa1bc5cc
--- /dev/null
+++ b/docs/spring/cs6c39b41a-4155-11ee-995c-acde48001122.java
@@ -0,0 +1,32 @@
+package com.huifer.data.list.circularLinkedList;
+
+/**
+ * <p>Title : CircularNode </p>
+ * <p>Description : 循环链表结点</p>
+ *
+ * @author huifer
+ * @date 2019-04-18
+ */
+public class CircularNode {
+
+    public Integer data;
+    public CircularNode next;
+
+    public CircularNode(Integer data) {
+        this.data = data;
+    }
+
+    public CircularNode() {
+    }
+
+    @Override
+    public String toString() {
+        final StringBuilder sb = new StringBuilder("{");
+        sb.append("\"data\":")
+                .append(data);
+        sb.append(",\"next\":")
+                .append(next);
+        sb.append('}');
+        return sb.toString();
+    }
+}
diff --git a/docs/spring/cs6c8068ce-4155-11ee-995c-acde48001122.java b/docs/spring/cs6c8068ce-4155-11ee-995c-acde48001122.java
new file mode 100644
index 00000000..895bdd7d
--- /dev/null
+++ b/docs/spring/cs6c8068ce-4155-11ee-995c-acde48001122.java
@@ -0,0 +1,21 @@
+/**
+ * Copyright 2009-2016 the original author or authors.
+ * <p>
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * <p>
+ * Base package for cursor feature
+ */
+/**
+ * Base package for cursor feature
+ */
+package org.apache.ibatis.cursor;
diff --git a/docs/spring/cs6cc29a00-4155-11ee-995c-acde48001122.java b/docs/spring/cs6cc29a00-4155-11ee-995c-acde48001122.java
new file mode 100644
index 00000000..96cebbd2
--- /dev/null
+++ b/docs/spring/cs6cc29a00-4155-11ee-995c-acde48001122.java
@@ -0,0 +1,111 @@
+package org.huifer.ztj.spring;
+
+import java.util.EnumSet;
+import org.springframework.messaging.Message;
+import org.springframework.messaging.support.MessageBuilder;
+import org.springframework.statemachine.StateContext;
+import org.springframework.statemachine.StateMachine;
+import org.springframework.statemachine.action.Action;
+import org.springframework.statemachine.config.StateMachineBuilder;
+import org.springframework.statemachine.config.StateMachineBuilder.Builder;
+import org.springframework.statemachine.guard.Guard;
+import org.springframework.statemachine.state.State;
+
+public class Main {
+
+  public static void main(String[] args) throws Exception {
+    StateMachine<States, Events> stateMachine = buildWithInternal();
+    stateMachine.start();
+
+//    stateMachine.sendEvent(Events.EVENT1);
+
+    Message<Events> user_id = MessageBuilder.withPayload(Events.EVENT1).setHeader("user_id", 100)
+        .build();
+    stateMachine.sendEvent(user_id);
+//    stateMachine.sendEvent(Events.EVENT2);
+
+    printState(stateMachine);
+    System.out.println();
+  }
+
+  private static void printState(StateMachine<States, Events> stateMachine) {
+    State<States, Events> state = stateMachine.getState();
+    States id = state.getId();
+    System.out.println("发送事件之后的状态");
+    System.out.println(id);
+  }
+
+
+  public static StateMachine<States, Events> buildWithInternal() throws Exception {
+    Builder<States, Events> builder = StateMachineBuilder.builder();
+
+    builder.configureStates()
+        .withStates()
+        .initial(States.STATE1)
+        .end(States.STATE3)
+        .states(EnumSet.allOf(States.class))
+    ;
+    builder.configureTransitions()
+        .withExternal()
+        .source(States.STATE1).target(States.STATE2).event(Events.EVENT1)
+        .guard(new Guard<States, Events>() {
+          @Override
+          public boolean evaluate(
+              StateContext<States, Events> context) {
+            return false;
+          }
+        })
+        .and()
+        // 做了什么失败了并且吧状态还原
+        .withInternal()
+        .source(States.STATE1).event(Events.EVENT1)
+
+    ;
+
+    return builder.build();
+  }
+
+
+  public static StateMachine<States, Events> buildMachine() throws Exception {
+    Builder<States, Events> builder = StateMachineBuilder.builder();
+
+    builder.configureStates()
+        .withStates()
+        .initial(States.STATE1)
+        .states(EnumSet.allOf(States.class))
+    ;
+    builder.configureTransitions()
+        .withExternal()
+        .source(States.STATE1).target(States.STATE2)
+        .event(Events.EVENT1)
+        .guard(new Guard<States, Events>() {
+          @Override
+          public boolean evaluate(
+              StateContext<States, Events> context) {
+            return false;
+          }
+        })
+
+        .action(new Action<States, Events>() {
+          @Override
+          public void execute(
+              StateContext<States, Events> context) {
+            // todo: 做状态变更的事情
+            Object user_id = context.getMessageHeaders().get("user_id");
+            System.out.println(user_id);
+            System.out.println();
+          }
+        })
+    ;
+
+    return builder.build();
+  }
+
+  enum States {
+    STATE1, STATE2, STATE3
+  }
+
+  enum Events {
+    EVENT1, EVENT2
+  }
+}
diff --git a/docs/spring/cs6d0ebbce-4155-11ee-995c-acde48001122.java b/docs/spring/cs6d0ebbce-4155-11ee-995c-acde48001122.java
new file mode 100644
index 00000000..9bb895ad
--- /dev/null
+++ b/docs/spring/cs6d0ebbce-4155-11ee-995c-acde48001122.java
@@ -0,0 +1,98 @@
+package dolores.oauthserver.service;
+
+import dolores.oauthserver.config.OAuth2ClientProperties;
+import dolores.oauthserver.config.OAuth2Properties;
+import org.apache.commons.lang.ArrayUtils;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.security.authentication.AuthenticationManager;
+import org.springframework.security.core.userdetails.UserDetailsService;
+import org.springframework.security.crypto.password.PasswordEncoder;
+import org.springframework.security.oauth2.config.annotation.builders.InMemoryClientDetailsServiceBuilder;
+import org.springframework.security.oauth2.config.annotation.configurers.ClientDetailsServiceConfigurer;
+import org.springframework.security.oauth2.config.annotation.web.configuration.AuthorizationServerConfigurerAdapter;
+import org.springframework.security.oauth2.config.annotation.web.configuration.EnableAuthorizationServer;
+import org.springframework.security.oauth2.config.annotation.web.configurers.AuthorizationServerEndpointsConfigurer;
+import org.springframework.security.oauth2.config.annotation.web.configurers.AuthorizationServerSecurityConfigurer;
+import org.springframework.security.oauth2.provider.token.TokenEnhancer;
+import org.springframework.security.oauth2.provider.token.TokenEnhancerChain;
+import org.springframework.security.oauth2.provider.token.TokenStore;
+import org.springframework.security.oauth2.provider.token.store.JwtAccessTokenConverter;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@Configuration
+@EnableAuthorizationServer
+public class GameAuthorizationServerConfig extends AuthorizationServerConfigurerAdapter {
+
+    @Autowired
+    private OAuth2Properties oAuth2Properties;
+
+    @Autowired
+    private UserDetailsService userDetailsService;
+
+    @Autowired
+    private AuthenticationManager authenticationManager;
+
+    @Autowired
+    private TokenStore tokenStore;
+
+    @Autowired(required = false)
+    @Qualifier("jwtAccessTokenConverter")
+    private JwtAccessTokenConverter jwtAccessTokenConverter;
+
+    @Autowired(required = false)
+    @Qualifier("jwtTokenEnhancer")
+    private TokenEnhancer jwtTokenEnhancer;
+
+    @Autowired
+    private PasswordEncoder passwordEncoder;
+
+    public GameAuthorizationServerConfig() {
+        super();
+    }
+
+    @Override
+    public void configure(AuthorizationServerSecurityConfigurer security) throws Exception {
+        security.tokenKeyAccess("permitAll()");
+        security.checkTokenAccess("isAuthenticated()");
+    }
+
+    @Override
+    public void configure(ClientDetailsServiceConfigurer clients) throws Exception {
+        InMemoryClientDetailsServiceBuilder builder = clients.inMemory();
+
+        if (ArrayUtils.isNotEmpty(oAuth2Properties.getClients())) {
+            for (OAuth2ClientProperties config : oAuth2Properties.getClients()) {
+                builder.withClient(config.getClientId())
+                        .secret(passwordEncoder.encode(config.getClientSecret()))
+                        .accessTokenValiditySeconds(config.getAccessTokenValiditySeconds())
+                        .refreshTokenValiditySeconds(60 * 60 * 24 * 15)
+                        .authorizedGrantTypes("refresh_token", "password", "authorization_code")//OAuth2支持的验证模式
+                        .redirectUris("http://www.ixx.com")
+                        .scopes("all");
+            }
+        }
+    }
+
+    @Override
+    public void configure(AuthorizationServerEndpointsConfigurer endpoints) throws Exception {
+        endpoints
+                .tokenStore(tokenStore)
+                .authenticationManager(authenticationManager)
+                .userDetailsService(userDetailsService);
+
+        if (jwtAccessTokenConverter != null && jwtTokenEnhancer != null) {
+            TokenEnhancerChain tokenEnhancerChain = new TokenEnhancerChain();
+            List<TokenEnhancer> enhancers = new ArrayList<>();
+            enhancers.add(jwtTokenEnhancer);
+            enhancers.add(jwtAccessTokenConverter);
+            tokenEnhancerChain.setTokenEnhancers(enhancers);
+            endpoints
+                    .tokenEnhancer(tokenEnhancerChain)
+                    .accessTokenConverter(jwtAccessTokenConverter);
+        }
+    }
+}
diff --git a/docs/spring/cs6d5cdba6-4155-11ee-995c-acde48001122.java b/docs/spring/cs6d5cdba6-4155-11ee-995c-acde48001122.java
new file mode 100644
index 00000000..c582e7eb
--- /dev/null
+++ b/docs/spring/cs6d5cdba6-4155-11ee-995c-acde48001122.java
@@ -0,0 +1,59 @@
+/**
+ * Copyright 2009-2019 the original author or authors.
+ * <p>
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.ibatis.cache;
+
+import org.apache.ibatis.cache.decorators.TransactionalCache;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * 缓存和事物管理器
+ * @author Clinton Begin
+ */
+public class TransactionalCacheManager {
+
+    private final Map<Cache, TransactionalCache> transactionalCaches = new HashMap<>();
+
+    public void clear(Cache cache) {
+        getTransactionalCache(cache).clear();
+    }
+
+    public Object getObject(Cache cache, CacheKey key) {
+        return getTransactionalCache(cache).getObject(key);
+    }
+
+    public void putObject(Cache cache, CacheKey key, Object value) {
+        getTransactionalCache(cache).putObject(key, value);
+    }
+
+    public void commit() {
+        for (TransactionalCache txCache : transactionalCaches.values()) {
+            txCache.commit();
+        }
+    }
+
+    public void rollback() {
+        for (TransactionalCache txCache : transactionalCaches.values()) {
+            txCache.rollback();
+        }
+    }
+
+    private TransactionalCache getTransactionalCache(Cache cache) {
+        return transactionalCaches.computeIfAbsent(cache, TransactionalCache::new);
+    }
+
+}
diff --git a/docs/spring/cs6da043dc-4155-11ee-995c-acde48001122.java b/docs/spring/cs6da043dc-4155-11ee-995c-acde48001122.java
new file mode 100644
index 00000000..02fa3392
--- /dev/null
+++ b/docs/spring/cs6da043dc-4155-11ee-995c-acde48001122.java
@@ -0,0 +1,24 @@
+package com.huifer.jdk.jdk8.stearm;
+
+import java.util.stream.Stream;
+
+/**
+ * 描述:
+ *
+ * @author huifer
+ * @date 2019-06-16
+ */
+public class Demo04 {
+    public static void main(String[] args) {
+//        Stream<String> stringStream = Stream.generate(UUID.randomUUID()::toString);
+        Stream<String> stringStream = null;
+
+        stringStream.findFirst().get();
+
+        if (stringStream.findFirst().isPresent()) {
+            // TODO:.....
+        }
+        stringStream.findFirst().ifPresent(System.out::println);
+
+    }
+}