- init

README.md

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+## Spring 与 Hessian 整合
+	demo采用的框架版本较高，jdk8, servlet-3.1, spring-5.0.0.RELEASE, Hessian-4.0.38, tomcat-8.5.23，详见pom.xml
+
+### web.xml中的配置
+	<servlet>
+		<servlet-name>remote</servlet-name>
+		<!-- 使用Spring的代理Servlet -->
+		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
+		<init-param>
+			<param-name>namespace</param-name>
+			<param-value>classes/remote-servlet</param-value>
+		</init-param>
+		<load-on-startup>1</load-on-startup>
+	</servlet>
+
+	<servlet-mapping>
+		<servlet-name>remote</servlet-name>
+		<url-pattern>/remote/*</url-pattern>
+	</servlet-mapping>
+
+### remote-servlet.xml 配置
+	<beans>  
+	    <!-- 接口的具体实现类 -->  
+	    <bean id="helloService" class="com.eastrobot.service.HelloServiceImpl" />  
+	    <!-- 使用Spring的HessianServie做代理 -->  
+	    <bean name="/hello" class="org.springframework.remoting.caucho.HessianServiceExporter">  
+	        <!-- service引用具体的实现实体Bean-->  
+	        <property name="service" ref="helloService" />
+	        <property name="serviceInterface" value="com.eastrobot.service.HelloService" />  
+	    </bean>  
+	      
+	    <!-- 可以配置多个HessianServiceExporter代理Bean -->  
+	</beans>
+
+### 测试用例
+	com.eastrobot.service.HelloServiceTests
+
+	访问地址：http://localhost:8080/kbase-hessian/remote/hello
+
+### 遇到的报错
+* org.springframework.web.util.NestedServletException: Hessian skeleton invocation failed; nested exception is java.io.IOException: Expected 'H'/'C' (Hessian 2.0) or 'c' (Hessian 1.0) in hessian input at -1
+
+	**解决方法**：查阅很多资料后，mvn 重新 clean package 后就好了
+
+### 参考文档
+
+http://hessian.caucho.com/doc/hessian-overview.xtp#HessianClient
+
+http://blog.csdn.net/dengdaixing/article/details/52250853
+
+http://www.cnblogs.com/yeahwell/p/4684492.html
+
+http://lavasoft.blog.51cto.com/62575/191889/
+
+### Hessian使用过程中可能遇到的问题
+* 实体类需要实现 Serializable 接口
+* 复杂对象的传输效率问题

pom.xml

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+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<groupId>com.eastrobot</groupId>
+	<artifactId>kbase-hessian</artifactId>
+	<packaging>war</packaging>
+	<version>0.0.1-SNAPSHOT</version>
+	<name>kbase-hessian Maven Webapp</name>
+	<url>http://maven.apache.org</url>
+	<dependencies>
+
+		<!-- https://mvnrepository.com/artifact/com.caucho/hessian -->
+		<dependency>
+			<groupId>com.caucho</groupId>
+			<artifactId>hessian</artifactId>
+			<version>4.0.38</version>
+		</dependency>
+		<!-- https://mvnrepository.com/artifact/org.springframework/spring-core -->
+		<dependency>
+		    <groupId>org.springframework</groupId>
+		    <artifactId>spring-core</artifactId>
+		    <version>5.0.0.RELEASE</version>
+		</dependency>
+		<!-- https://mvnrepository.com/artifact/org.springframework/spring-web -->
+		<dependency>
+		    <groupId>org.springframework</groupId>
+		    <artifactId>spring-web</artifactId>
+		    <version>5.0.0.RELEASE</version>
+		</dependency>
+		<!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
+		<dependency>
+		    <groupId>org.springframework</groupId>
+		    <artifactId>spring-webmvc</artifactId>
+		    <version>5.0.0.RELEASE</version>
+		</dependency>
+		<!-- https://mvnrepository.com/artifact/org.apache.httpcomponents/httpclient -->
+		<dependency>
+		    <groupId>org.apache.httpcomponents</groupId>
+		    <artifactId>httpclient</artifactId>
+		    <version>4.5.3</version>
+		</dependency>
+
+		<!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
+		<dependency>
+		    <groupId>javax.servlet</groupId>
+		    <artifactId>javax.servlet-api</artifactId>
+		    <version>3.1.0</version>
+		    <scope>provided</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>junit</groupId>
+			<artifactId>junit</artifactId>
+			<version>4.10</version>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+	<build>
+		<finalName>kbase-hessian</finalName>
+	</build>
+</project>

src/main/java/com/eastrobot/service/HelloService.java

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+/*
+ * Power by www.xiaoi.com
+ */
+package com.eastrobot.service;
+/**
+ * @author <a href="mailto:[email protected]">eko.zhan</a>
+ * @date 2017年10月16日 下午4:46:07
+ * @version 1.0
+ */
+public interface HelloService {
+
+	public String sayHello();
+
+	public String sayHi(String username);
+}

src/main/java/com/eastrobot/service/HelloServiceImpl.java

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+/*
+ * Power by www.xiaoi.com
+ */
+package com.eastrobot.service;
+
+import com.caucho.hessian.server.HessianServlet;
+
+/**
+ * @author <a href="mailto:[email protected]">eko.zhan</a>
+ * @date 2017年10月16日 下午4:54:49
+ * @version 1.0
+ */
+public class HelloServiceImpl extends HessianServlet implements HelloService {
+
+	public String sayHello() {
+		return "Hello World";
+	}
+
+	public String sayHi(String username){
+		return "Hi " + username;
+	}
+
+}

src/main/resources/remote-servlet.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">  
+<beans>  
+    <!-- 接口的具体实现类 -->  
+    <bean id="helloService" class="com.eastrobot.service.HelloServiceImpl" />  
+    <!-- 使用Spring的HessianServie做代理 -->  
+    <bean name="/hello" class="org.springframework.remoting.caucho.HessianServiceExporter">  
+        <!-- service引用具体的实现实体Bean-->  
+        <property name="service" ref="helloService" />
+        <property name="serviceInterface" value="com.eastrobot.service.HelloService" />  
+    </bean>  
+
+    <!-- 可以配置多个HessianServiceExporter代理Bean -->  
+</beans>  

src/main/webapp/WEB-INF/web.xml

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+<!DOCTYPE web-app PUBLIC
+ "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
+ "http://java.sun.com/dtd/web-app_2_3.dtd" >
+
+<web-app>
+	<display-name>kbase-hessian server</display-name>
+	<servlet>
+		<servlet-name>remote</servlet-name>
+		<!-- 使用Spring的代理Servlet -->
+		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
+		<init-param>
+			<param-name>namespace</param-name>
+			<param-value>classes/remote-servlet</param-value>
+		</init-param>
+		<load-on-startup>1</load-on-startup>
+	</servlet>
+
+	<servlet-mapping>
+		<servlet-name>remote</servlet-name>
+		<url-pattern>/remote/*</url-pattern>
+	</servlet-mapping>
+</web-app>

src/main/webapp/index.html

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+<!DOCTYPE HTML>
+<html>
+	<head>
+		<title>Hello Hessian</title>
+	</head>
+	<body>
+		Hello Hessian!
+	</body>
+</html>

src/test/java/com/eastrobot/service/HelloServiceTests.java

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+/*
+ * Power by www.xiaoi.com
+ */
+package com.eastrobot.service;
+
+import java.net.MalformedURLException;
+
+import org.junit.Test;
+
+import com.caucho.hessian.client.HessianProxyFactory;
+
+/**
+ * @author <a href="mailto:[email protected]">eko.zhan</a>
+ * @date 2017年10月16日 下午6:15:38
+ * @version 1.0
+ */
+public class HelloServiceTests {
+
+	@Test
+	public void sayHello() throws MalformedURLException{
+		String url = "http://localhost:8080/kbase-hessian/remote/hello";
+        HessianProxyFactory factory = new HessianProxyFactory();
+        factory.setOverloadEnabled(true);
+        HelloService api = (HelloService) factory.create(HelloService.class, url);
+
+        System.out.println(api.sayHello());
+        System.out.println("---------------------------");
+
+        System.out.println(api.sayHi("eko.zhan"));
+	}
+}

src/test/java/com/eastrobot/service/HelloWorld.java

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+/*
+ * Power by www.xiaoi.com
+ */
+package com.eastrobot.service;
+
+import java.io.IOException;
+
+import org.apache.http.HttpEntity;
+import org.apache.http.HttpResponse;
+import org.apache.http.client.ClientProtocolException;
+import org.apache.http.client.ResponseHandler;
+import org.apache.http.client.methods.HttpPost;
+import org.apache.http.impl.client.CloseableHttpClient;
+import org.apache.http.impl.client.HttpClients;
+import org.apache.http.util.EntityUtils;
+
+/**
+ * @author <a href="mailto:[email protected]">eko.zhan</a>
+ * @date 2017年10月16日 下午7:21:49
+ * @version 1.0
+ */
+public class HelloWorld {
+
+	public static void main(String[] args) throws ClientProtocolException, IOException {
+		System.out.println(1);
+		CloseableHttpClient httpclient = HttpClients.createDefault();
+        try {
+            HttpPost httpget = new HttpPost("http://localhost:8080/kbase-hessian/remote/hello");
+
+            System.out.println("Executing request " + httpget.getRequestLine());
+
+            // Create a custom response handler
+            ResponseHandler<String> responseHandler = new ResponseHandler<String>() {
+
+                public String handleResponse(
+                        final HttpResponse response) throws ClientProtocolException, IOException {
+                    int status = response.getStatusLine().getStatusCode();
+                    if (status >= 200 && status < 300) {
+                        HttpEntity entity = response.getEntity();
+                        return entity != null ? EntityUtils.toString(entity) : null;
+                    } else {
+                        throw new ClientProtocolException("Unexpected response status: " + status);
+                    }
+                }
+
+            };
+            String responseBody = httpclient.execute(httpget, responseHandler);
+            System.out.println("----------------------------------------");
+            System.out.println(responseBody);
+        } finally {
+            httpclient.close();
+        }
+	}
+}