Spring之rmi实例演示

环境介绍：本文中服务端客户端使用的都是ssm框架，配置文件分为spring_servlet.xml,spring_service.xml,mybatis.xml

在spring里面使用rmi完成远程调用步骤分以下几步：

一、在服务端

1.编写服务端接口

package com.dzf.service;

import java.util.List;

import com.dzf.entity.Author;

public interface RmiServerService {
    public List<Author> getAuthorByName(String name);
    
    public Integer insertAuthor(Author author);
}

2.编写具体的实现类

package com.dzf.service;

import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import com.dzf.dao.AuthorDao;
import com.dzf.entity.Author;
//@Service   //这里面不需要自动注入，需要手写bean
public class RmiServerServiceImpl implements RmiServerService {
    
    @Autowired
    private AuthorDao authorDao;
    
    @Override
    public List<Author> getAuthorByName(String name) {
        // TODO Auto-generated method stub
        if(name==null && "".equals(name)){
            return null;
        }
        return authorDao.getAuthorByName(name);
    }

    @Transactional
    @Override
    public Integer insertAuthor(Author author) {
        // TODO Auto-generated method stub
        if(author == null){
            return null;
        }
        authorDao.insert(author);
        return author.getId(); //返回的插入这条数据的主键值
    }

}

3.在spring-service.xml中添加服务端的配置

<bean name = "rmiServerService" class="com.dzf.service.RmiServerServiceImpl"></bean>
    <bean name="rmiTest" class="org.springframework.remoting.rmi.RmiServiceExporter">  
       <property name="service" ref="rmiServerService" />  
       <property name="serviceName" value="rmiServerService" />  
       <!--这个地方必须写接口的位置全限定名  -->
       <property name="serviceInterface" value="com.dzf.service.RmiServerService"/>  
       <!-- 这个端口不能和项目的端口一样，是个独立的端口 -->
       <property name="registryPort" value="8083" />  
</bean>

我这里把dao层的写法也贴出来，仅供查考

package com.dzf.dao;

import java.util.List;

import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Options;
import org.apache.ibatis.annotations.Select;
import org.springframework.stereotype.Repository;

import com.dzf.entity.Author;

@Repository
public interface AuthorDao {

    @Select("select * from author t where t.id = #{id}")
    public Author getAuthorById(Integer Id);
    
    @Select("select * from author t where t.name like concat('%',#{name},'%')")
    public List<Author> getAuthorByName(String name);
    
    @Insert("insert into author(name,age,tel) values (#{name},#{age},#{tel})")
    @Options(useGeneratedKeys=true,keyProperty="id")
    public Integer insert(Author author);
}

二、客户端（调用端的配置）

1.编写一个和服务端一模一样的接口

 1 package com.dzf.service;
 2 
 3 import java.util.List;
 4 
 5 import com.dzf.entity.Author;
 6 
 7 public interface RmiServerService {
 8     public List<Author> getAuthorByName(String name);
 9     
10     public Integer insertAuthor(Author author);
11 }

2.编写配置文件

<!-- Spring Rmi 客户端配置 -->
    <bean id="rmiServerService" class="org.springframework.remoting.rmi.RmiProxyFactoryBean">  
       <property name="serviceUrl" value="rmi://127.0.0.1:8083/rmiServerService"/>   
        <property name="serviceInterface" value="com.dzf.rmi.service.RmiServerService"/>   
        <property name="lookupStubOnStartup" value="false"/>  
        <property name="refreshStubOnConnectFailure" value="true"></property>  
    </bean>

3.编写controller层的代码

package com.dzf.rmi.controller;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import com.dzf.entity.Author;
import com.dzf.rmi.service.RmiServerService;

@Controller
@RequestMapping("/rmi")
public class RmiServlet {

    @Autowired
    private RmiServerService rmiServerService; //这个起的名字要和配置文件里面的一样
    
    @RequestMapping("/getAuthorByName")
    @ResponseBody
    public List<Author> getAuthorByName(){
        String name  = "a"; 
        return rmiServerService.getAuthorByName(name);        
    }
    
    
    @RequestMapping("/insert")
    @ResponseBody
    public Integer insert(){
        Author author = new Author();
        author.setName("丁");
        author.setAge(23);
        author.setTel("13033563156");
        return  rmiServerService.insertAuthor(author);
    }
    
}

4.使用接口工具调用

1.

2.

 

到此可以看到，调用完全没有问题！

总结下：

核心

1.服务端通过org.springframework.remoting.rmi.RmiServiceExporter这个类暴露服务接口

2.服务端和客户端定义同样的接口

3.调用端通过org.springframework.remoting.rmi.RmiProxyFactoryBean调用服务端的暴露的接口

 注意：实体类需要实现序列化接口！