SpringBoot——RestTemplate远程调用python rest接口

#最近在写Hadoop集群推荐系统，后台实用的是SpringBoot，然鹅后台的数据分析核心的算法部分是和SpringBoot分离的

需要远程调用

Python使用的是django，Java是Springboot，Python调Java可以使用Telnet调用Java的dubbo接口（会另写一篇），Java调用Python就是用Spring提供的RestTemplate

需求：SpringBoot远程调用python的函数

实现：SpringBoot---RestTemplate+python rest接口

首先配置RestTemplate

package com.hqjl.career.config;
 
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.context.annotation.Bean;
import org.springframework.http.client.ClientHttpRequestFactory;
import org.springframework.http.client.SimpleClientHttpRequestFactory;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.StringHttpMessageConverter;
import org.springframework.stereotype.Component;
import org.springframework.web.client.RestOperations;
import org.springframework.web.client.RestTemplate;
 
import java.nio.charset.Charset;
import java.util.Iterator;
import java.util.List;
 

@Component
public class RestTemplateConfig {
 
    @Bean
    @ConditionalOnMissingBean({RestOperations.class , RestTemplate.class})
    public RestTemplate restTemplate(ClientHttpRequestFactory factory) {
        RestTemplate restTemplate = new RestTemplate(factory);
 
        List> messageConverters = restTemplate.getMessageConverters();
        Iterator> iterator = messageConverters.iterator();
        while (iterator.hasNext()) {
            HttpMessageConverter converter = iterator.next();
            if(converter instanceof StringHttpMessageConverter) {
                iterator.remove();
            }
        }
 
        messageConverters.add(new StringHttpMessageConverter(Charset.forName("UTF-8")));
        return restTemplate;
    }
 
    @Bean
    @ConditionalOnMissingBean({ClientHttpRequestFactory.class})
    public ClientHttpRequestFactory simpleClientHttpRequestFactory() {
        SimpleClientHttpRequestFactory factory = new SimpleClientHttpRequestFactory();
        factory.setReadTimeout(15000);
        factory.setConnectTimeout(12000);
        return factory;
    }
 
}

我们这里是远程调用rest，post方法需要带参数

首先设置请求头

HttpHeaders httpHeaders = new HttpHeaders();
httpHeaders.setContentType(MediaType.APPLICATION_JSON);

参数

JSONObject param = new JSONObject();
param.put("gradeID",gradeID);
param.put("schoolID" , schoolID);
param.put("type" , 1);

定义URL，这里我有部分URL是在配置文件中的，不同环境ip，port可能会变动

@Value("${pythonserv}")
private String pyURL;

String URL = pyURL + "/intention/commonList";

请求以及响应接收

HttpEntity entity = new HttpEntity<>(param.toString() , httpHeaders);
HttpEntity response = restTemplate.exchange(URL, HttpMethod.POST , entity , String.class);

简单说一下Python端，因为有几个坑，首先Python端接收到参数解析完类型是unicode，我们取参数肯定想用的是字典类型嘛，

所以我简单写一下，有兴趣的童鞋可以试一下每一步打印type()

def commonList(request):
    dict = json.loads(request.body.decode())   unicode
    dict = dict.encode('utf-8')                str
    dict = json.loads(dict)                    dict

都看到这了，点个赞再走呗