Spring http服务远程调用实现过程解析

最近公司有个新的需求，写了一个接口，想要把服务暴露出去，但是这个服务所在的进程是非web项目，（可以理解成schedule/batch等进程项目），所以没有tomcat等容器，而且只有这一个服务，无论是加dubbo服务还是加tomcat等容器都显得复杂了。那么应该如何将服务暴露出去？

经过网上搜索后，最终解决问题，记录在此。

为了快速搭建，使用springboot来搭建项目：

项目结构如图：

首先需要创建一个接口，服务的提供者和服务的调用方都依赖这个模块。

package com.xiazhi.spring.service.api;

import com.sun.istack.internal.NotNull;
import com.sun.istack.internal.Nullable;


public interface IUserService {

  
  String getName();

  
  @NotNull
  Integer getAge(@Nullable String name);
}

然后在service模块中，实现接口作为服务的提供方，需要依赖的jar包有：

    
      com.xiazhi
      spring-service-api
      ${project.version}
    

    
      org.springframework.boot
      spring-boot-starter-web
      
 
   org.springframework.boot
   spring-boot-starter-tomcat
 
      
    

    
      javax.servlet
      servlet-api
      2.5
    
  

配置文件需要加上：

spring.main.web-application-type=none

实现接口：

package com.xiazhi.spring.service.impl;

import com.sun.istack.internal.NotNull;
import com.sun.istack.internal.Nullable;
import com.xiazhi.spring.service.api.IUserService;
import org.springframework.stereotype.Service;


@Service
public class UserServiceImpl implements IUserService {

  @Override
  public String getName() {
    return "张一";
  }

  @Override
  @NotNull
  public Integer getAge(@Nullable String name) {
    if ("".equals(name)) {
      return 10;
    }
    return 18;
  }
}

暴露服务：

package com.xiazhi.spring.service.config;

import com.sun.net.httpserver.HttpHandler;
import com.xiazhi.spring.service.api.IUserService;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.task.TaskExecutor;
import org.springframework.remoting.httpinvoker.SimpleHttpInvokerServiceExporter;
import org.springframework.remoting.support.SimpleHttpServerFactoryBean;

import java.util.HashMap;
import java.util.Map;


@Configuration
public class HttpInvokerConfiguration {

  private final IUserService userService;
  private final TaskExecutor taskExecutor;

  public HttpInvokerConfiguration(IUserService userService, TaskExecutor taskExecutor) {
    this.userService = userService;
    this.taskExecutor = taskExecutor;
  }

  
  @Bean
  public SimpleHttpInvokerServiceExporter serviceExporter() {
    SimpleHttpInvokerServiceExporter exporter = new SimpleHttpInvokerServiceExporter();
    exporter.setService(userService);
    exporter.setServiceInterface(IUserService.class);
    return exporter;
  }

  
  @Bean
  public SimpleHttpServerFactoryBean serverFactoryBean() {
    SimpleHttpServerFactoryBean factoryBean = new SimpleHttpServerFactoryBean();
    Map map = new HashMap<>(2);
    factoryBean.setContexts(map);
    factoryBean.setPort(9999);
    factoryBean.setExecutor(taskExecutor);
    return factoryBean;
  }
}

启动服务。

然后是服务的调用方，依赖有：

    
      com.xiazhi
      spring-service-api
      ${project.version}
    
    
      org.springframework.boot
      spring-boot-starter-web
    
  

配置文件：

package com.xiazhi.spring.config;

import com.xiazhi.spring.service.api.IUserService;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.remoting.httpinvoker.HttpInvokerProxyFactoryBean;


@Configuration
public class HttpServiceConfiguration {

  
  @Bean
  public HttpInvokerProxyFactoryBean httpInvokerProxyFactoryBean() {
    HttpInvokerProxyFactoryBean factoryBean = new HttpInvokerProxyFactoryBean();
    factoryBean.setServiceUrl("http://localhost:9999/userService");
    factoryBean.setServiceInterface(IUserService.class);
    return factoryBean;
  }
}

使用接口，调用方法：

package com.xiazhi.spring.controller;

import com.xiazhi.spring.service.api.IUserService;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;


@RestController
public class UserController {

  private final IUserService userService;

  public UserController(IUserService userService) {
    this.userService = userService;
  }

  @GetMapping("/test")
  public String test() {
    String name = userService.getName();
    Integer age = userService.getAge(null);
    System.out.println(String.format("姓名：[%s],age:[%s]", name, age));
    return name;
  }
}

运行，调用test路径测试调用结果。

项目完整结构：

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持考高分网。