Hessian是一个采用二进制格式传输的服务框架，相对传统soap web service，更轻量，更快速。官网地址：http://hessian.caucho.com/
先上个效果图，在客户端界面通过ID查询后调用后台的Hession服务获取用户数据。
工程分为三个部分，一个WEB工程，一个公共接口工程，一个客户端工程，WEB工程跟客户端工程通过Maven依赖于公共接口工程。
1.通过Maven新建一个名称为HessianInterfaces的工程,Archetype选择maven-archetype-quickstart。
其pom.xml如下：
<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.ken.mv</groupId>
<artifactId>HessianInterfaces</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>HessianInterfaces</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
</dependencies>
</project>
在工程内创建一个User的实体类：
package com.ken.entity;
public class User implements java.io.Serializable {
public User(){}
public User(int id,String userName,String sex){
this.id = id;
this.userName = userName;
this.sex = sex;
}
private int id;
private String userName;
private String sex;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
}
接着在工程内创建一个接口文件：
package com.ken.service;
import com.ken.entity.User;
public interface IHessianService {
public User getUserById(int id); //通过id查询用户
}
至此接口工程就制作完成了。
2.建立WEB工程，其pom.xml内依赖于hessian、spring、接口工程
<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.ken.mv</groupId> <artifactId>KenMaven</artifactId> <packaging>war</packaging> <version>0.0.1-SNAPSHOT</version> <name>KenMaven Maven Webapp</name> <url>http://maven.apache.org</url> <repositories> <repository> <id>maven-net-cn</id> <name>aliyu-Maven</name> <url>http://maven.aliyun.com/nexus/content/groups/public/</url> <releases> <enabled>true</enabled> </releases> <snapshots> <enabled>false</enabled> </snapshots> </repository> </repositories> <dependencies>
<!--接口工程--> <dependency> <groupId>com.ken.mv</groupId> <artifactId>HessianInterfaces</artifactId> <version>0.0.1-SNAPSHOT</version> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency> <dependency> <groupId>com.caucho</groupId> <artifactId>hessian</artifactId> <version>4.0.7</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>4.3.8.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>4.3.8.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>4.3.8.RELEASE</version> </dependency> </dependencies> <build> <finalName>KenMaven</finalName> </build> </project>
创建接口的实现类，并简单的初始化一些数据：
package com.ken.service.impl;
import com.ken.service.IHessianService;
import java.util.ArrayList;
import java.util.List;
import com.ken.entity.User;
public class HessianServiceImpl implements IHessianService {
static List<User> list = new ArrayList<User>();
static {
list.add(new User(1, "Ken", "Male"));
list.add(new User(2, "Jack", "Male"));
list.add(new User(3, "Lucy", "Male"));
list.add(new User(4, "Michael", "Male"));
list.add(new User(5, "Pearl", "Female"));
}
public User getUserById(int id) {
for (User u : list) {
if (u.getId() == id) {
return u;
}
}
return null;
}
}
在resources文件夹内添加hession-context.xml文件
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
<!-- BeanNameUrlHandlerMapping的作用是，当<bean>的name属性以/开头的时候，映射为url请求。 -->
<!-- <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"/> -->
<bean id="hessianServiceImpl" class="com.ken.service.impl.HessianServiceImpl" />
<!-- 使用HessianServiceExporter 将普通bean导出成Hessian服务 -->
<bean name="/ihessian.service"
class="org.springframework.remoting.caucho.HessianServiceExporter">
<property name="service" ref="hessianServiceImpl" />
<!-- Hessian服务的接口 -->
<property name="serviceInterface" value="com.ken.service.IHessianService" />
</bean>
</beans>
web.xml如下，用spring拦截.service结尾的hession服务：
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
version="3.1">
<display-name>Archetype Created Web Application</display-name>
<!-- spring mvc-->
<servlet>
<servlet-name>dispatherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-context.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!--hessian-->
<servlet>
<servlet-name>hessianServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:hessian-context.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>hessianServlet</servlet-name>
<url-pattern>*.service</url-pattern>
</servlet-mapping>
</web-app>
此时在Tomcate内发布工web工程。访问hession服务,出现如下错误表示配置成功。
3.跟第一步一样创建一个普通的Maven工程。
pom.xml文件如下,也需要添加接口工程的依赖。
<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/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.ken.mv</groupId> <artifactId>Client</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>Client</name> <url>http://maven.apache.org</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties> <repositories> <repository> <id>maven-net-cn</id> <name>aliyu-Maven</name> <url>http://maven.aliyun.com/nexus/content/groups/public/</url> <releases> <enabled>true</enabled> </releases> <snapshots> <enabled>false</enabled> </snapshots> </repository> </repositories> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency> <dependency> <groupId>com.caucho</groupId> <artifactId>hessian</artifactId> <version>4.0.7</version> </dependency> <dependency> <groupId>com.ken.mv</groupId> <artifactId>HessianInterfaces</artifactId> <version>0.0.1-SNAPSHOT</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>4.3.8.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>4.3.8.RELEASE</version> </dependency> <dependency> <groupId>org.eclipse.swt</groupId> <artifactId>org.eclipse.swt.win32.win32.x86</artifactId> <version>4.3</version> </dependency> </dependencies> </project>
创建hessian-client.xml文件：
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<bean id="hessianService"
class="org.springframework.remoting.caucho.HessianProxyFactoryBean">
<property name="serviceUrl">
<value>http://localhost:8080/WebApp/ihessian.service</value>
</property>
<property name="serviceInterface">
<value>com.ken.service.IHessianService</value>
</property>
</bean>
</beans>
窗体（SWT绘制）实现及调用服务如下：
package com.ken.mv.Client;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.MouseEvent;
import org.eclipse.swt.events.MouseListener;
import org.eclipse.swt.layout.FormLayout;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Group;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.MessageBox;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.ken.entity.User;
import com.ken.service.IHessianService;
public class App
{
public static void main( String[] args )
{
Display display = new Display();
final Shell shell = new Shell(display,SWT.SHELL_TRIM);
shell.setSize(300, 300);
shell.setText("Hessian");
shell.setLayout(new FormLayout());
final Group group = new Group(shell,SWT.SHADOW_ETCHED_IN);
group.setText("用户查询");
final GridData gd_group = new GridData(SWT.FILL,SWT.FILL,true,true);
gd_group.heightHint = 100;
//group.setData(gd_group);
org.eclipse.swt.layout.GridLayout gridLayout = new org.eclipse.swt.layout.GridLayout(2, true);
gridLayout.verticalSpacing = 5;
gridLayout.horizontalSpacing = 5;
gridLayout.marginLeft = 10;
gridLayout.marginRight = 10;
gridLayout.marginTop = 10;
group.setLayout(gridLayout);
final Label idLabel = new Label(group,SWT.NONE);
final GridData gd_idLabel = new GridData(SWT.LEFT,SWT.CENTER,false,false);
idLabel.setText("ID:");
idLabel.setData(gd_idLabel);
final Text idText = new Text(group,SWT.BORDER);
final GridData gd_idText = new GridData(SWT.LEFT,SWT.CENTER,false,false);
gd_idText.widthHint = 100;
idText.setData(gd_idText);
final Label userNameLabel = new Label(group,SWT.NONE);
final GridData gd_userNameLabel = new GridData(SWT.LEFT,SWT.CENTER,false,false);
userNameLabel.setText("UserName:");
userNameLabel.setData(gd_userNameLabel);
final Text userNameText = new Text(group,SWT.BORDER);
final GridData gd_userNameText = new GridData(SWT.LEFT,SWT.CENTER,false,false);
gd_userNameText.widthHint = 100;
userNameText.setData(gd_userNameText);
final Label sexLabel = new Label(group,SWT.NONE);
final GridData gd_sexLabel = new GridData(SWT.LEFT,SWT.CENTER,false,false);
sexLabel.setText("Sex");
sexLabel.setData(gd_sexLabel);
final Text sexText = new Text(group,SWT.BORDER);
final GridData gd_sexText = new GridData(SWT.LEFT,SWT.CENTER,false,false);
gd_sexText.widthHint = 100;
sexText.setData(gd_sexText);
Button searchButton = new Button(group,SWT.NONE);
final GridData gd_searchButton = new GridData(SWT.CENTER,SWT.CENTER,false,false);
searchButton.setData(gd_searchButton);
searchButton.setText("Search");
searchButton.addMouseListener(new MouseListener(){
public void mouseDoubleClick(MouseEvent e) {
}
public void mouseDown(MouseEvent e) {
//调用hessian服务，获取数据
ApplicationContext context = new ClassPathXmlApplicationContext("hessian-client.xml");
IHessianService service = (IHessianService)context.getBean("hessianService");
String value = idText.getText();
int id = Integer.parseInt(value);
User user = service.getUserById(id);
if(null!=user){
userNameText.setText(user.getUserName());
sexText.setText(user.getSex());
} else {
MessageBox box = new MessageBox(shell);
box.setText("Tip");
box.setMessage("User Not Found");
box.open();
}
}
public void mouseUp(MouseEvent e) {
}
});
shell.open();
while(!shell.isDisposed()){
if(!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
}
到这里整个DEMO项目就完成了。如果输入不存在的，则提示：
