以2.2.1.BUILD-SNAPSHOT 为基准，适配Greenwich版本的Spring Cloud

spring-cloud-alibaba-examples/sentinel-example/sentinel-core-example/pom.xml

@@ -30,6 +30,10 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-actuator</artifactId>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-thymeleaf</artifactId>
+        </dependency>
 
         <!--<dependency>-->
         <!--<groupId>com.alibaba.csp</groupId>-->

spring-cloud-alibaba-examples/sentinel-example/sentinel-core-example/readme.md

@@ -193,14 +193,27 @@ Now ReadableDataSource type support 5 categories: `file`, `nacos`, `zk`, `apollo
 
 If you want to use `nacos`, `zk`, `apollo` or `redis` ReadableDataSource, you could add `sentinel-datasource-nacos`, `sentinel-datasource-zookeeper`,`sentinel-datasource-apollo` or `sentinel-datasource-redis` dependency.
 
+
+
 When ReadableDataSource load rule data successfully, console will print some logs:
 
 ```
 [Sentinel Starter] DataSource ds1-sentinel-file-datasource load 3 DegradeRule
 [Sentinel Starter] DataSource ds2-sentinel-nacos-datasource load 2 FlowRule
 ```   
+## Warning
+You should  use `file` ReadableDataSource in a fatjar carefully or you may get error like this below
+
+```
+java.lang.RuntimeException: [Sentinel Starter] DataSource ds1 handle file [classpath: flowrule.json] error: class path resource [flowrule.json] cannot be resolved to absolute file path because it does not reside in the file system: jar:file:xxx/xxx.jar!/BOOT-INF/classes!/flowrule.jso
+```
+
+You could use absolute path when you use File datasource & fat jar.
+It is recommended to use Nacos/Apollo/Zookeeper/Redis datasource to store rules.
+
+https://github.com/alibaba/spring-cloud-alibaba/issues/428
 
 ## More
 For more information about Sentinel, see [Sentinel Project](https://github.com/alibaba/Sentinel).
 
-If you have any ideas or suggestions for Spring Cloud Sentinel starter, please don't hesitate to tell us by submitting github issues.
+If you have any ideas or suggestions for Spring Cloud Sentinel starter, please don't hesitate to tell us by submitting github issues.

spring-cloud-alibaba-examples/sentinel-example/sentinel-core-example/src/main/java/com/alibaba/cloud/examples/ExceptionUtil.java

@@ -1,3 +1,19 @@
+/*
+ * Copyright 2013-2018 the original author or authors.
+ *
+ * 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
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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 com.alibaba.cloud.examples;
 
 import com.alibaba.cloud.sentinel.rest.SentinelClientHttpResponse;
@@ -9,7 +25,11 @@ import org.springframework.http.client.ClientHttpRequestExecution;
 /**
  * @author fangjian
  */
-public class ExceptionUtil {
+public final class ExceptionUtil {
+
+	private ExceptionUtil() {
+
+	}
 
 	public static SentinelClientHttpResponse handleException(HttpRequest request,
 			byte[] body, ClientHttpRequestExecution execution, BlockException ex) {

spring-cloud-alibaba-examples/sentinel-example/sentinel-core-example/src/main/java/com/alibaba/cloud/examples/JsonFlowRuleListConverter.java

@@ -1,3 +1,19 @@
+/*
+ * Copyright 2013-2018 the original author or authors.
+ *
+ * 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
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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 com.alibaba.cloud.examples;
 
 import java.util.List;
@@ -11,9 +27,11 @@ import com.alibaba.fastjson.TypeReference;
  * @author fangjian
  */
 public class JsonFlowRuleListConverter implements Converter<String, List<FlowRule>> {
+
 	@Override
 	public List<FlowRule> convert(String source) {
 		return JSON.parseObject(source, new TypeReference<List<FlowRule>>() {
 		});
 	}
+
 }

spring-cloud-alibaba-examples/sentinel-example/sentinel-core-example/src/main/java/com/alibaba/cloud/examples/ServiceApplication.java

@@ -1,3 +1,19 @@
+/*
+ * Copyright 2013-2018 the original author or authors.
+ *
+ * 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
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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 com.alibaba.cloud.examples;
 
 import com.alibaba.cloud.sentinel.annotation.SentinelRestTemplate;

spring-cloud-alibaba-examples/sentinel-example/sentinel-core-example/src/main/java/com/alibaba/cloud/examples/TestController.java

@@ -1,3 +1,19 @@
+/*
+ * Copyright 2013-2018 the original author or authors.
+ *
+ * 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
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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 com.alibaba.cloud.examples;
 
 import com.alibaba.csp.sentinel.annotation.SentinelResource;
@@ -16,24 +32,24 @@ public class TestController {
 	@Autowired
 	private RestTemplate restTemplate;
 
-	@GetMapping(value = "/hello")
+	@GetMapping("/hello")
 	@SentinelResource("resource")
 	public String hello() {
 		return "Hello";
 	}
 
-	@GetMapping(value = "/aa")
+	@GetMapping("/aa")
 	@SentinelResource("aa")
 	public String aa(int b, int a) {
 		return "Hello test";
 	}
 
-	@GetMapping(value = "/test")
+	@GetMapping("/test")
 	public String test1() {
 		return "Hello test";
 	}
 
-	@GetMapping(value = "/template")
+	@GetMapping("/template")
 	public String client() {
 		return restTemplate.getForObject("http://www.taobao.com/test", String.class);
 	}

spring-cloud-alibaba-examples/sentinel-example/sentinel-core-example/src/main/java/com/alibaba/cloud/examples/WebMvcConfiguration.java

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2013-2018 the original author or authors.
+ *
+ * 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
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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 com.alibaba.cloud.examples;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.config.annotation.EnableWebMvc;
+import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+/**
+ * @author yuhuangbin
+ */
+@Configuration
+@EnableWebMvc
+public class WebMvcConfiguration implements WebMvcConfigurer {
+
+	@Override
+	public void addViewControllers(ViewControllerRegistry registry) {
+		registry.addViewController("/errorPage").setViewName("errorPage");
+	}
+
+}

spring-cloud-alibaba-examples/sentinel-example/sentinel-core-example/src/main/resources/application.properties

@@ -9,6 +9,9 @@ management.health.diskspace.enabled=false
 
 spring.cloud.sentinel.transport.dashboard=localhost:8080
 spring.cloud.sentinel.eager=true
+
+#spring.cloud.sentinel.block-page=/errorPage
+#spring.cloud.sentinel.filter.enabled=false
 #spring.cloud.sentinel.http-method-specify=false
 
 spring.cloud.sentinel.datasource.ds1.file.file=classpath: flowrule.json

spring-cloud-alibaba-examples/sentinel-example/sentinel-core-example/src/main/resources/templates/errorPage.html

@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Title</title>
+</head>
+<body>
+This is error page.
+</body>
+</html>