线程中使用@Autowired注入

场景
工具RestTemplate
- 代码实现

场景

多多线程同时访问接口，测试接口稳定性

工具RestTemplate

使用springboot自带http调用
线程类实现Callable

代码实现

一下是通过@Autowired注入的方式

public static void main(String[] arge){
            Future p = pool.submit(new RunnableUtil(url, urlSuffixInsertNews, body1, tokenDto.getToken()));
            JSONObject resJson = JSONObject.parseObject(p.get().toString());
}

线程类

package com.yx.util.runnable;

import com.alibaba.fastjson.JSONObject;
import com.yx.util.httpClient.ClientUtil;
import lombok.Data;
import java.util.Map;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

@Data
public class RunnableUtil implements Callable {

	@Autowired
    private ClientUtil clientUtil;
    
    private String url;
    private Map json;
    private String urlSuffix;
    private String token;
    public RunnableUtil(String url, String urlSuffix, Map json, String token){
        super();
        this.url = url;
        this.urlSuffix = urlSuffix;
        this.json = json;
        this.token = token;
    }
    @Override
    public Object call() throws Exception {
        String res = clientUtil.doPost(url, urlSuffix, json, token);
        return res;
    }
}

请求方法

package com.yx.util.httpClient;


import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.ResponseEntity;
import org.springframework.web.client.RestTemplate;
import org.springframework.web.util.DefaultUriBuilderFactory;

import java.util.Map;
@Component
public class ClientUtil {

	 @Autowired
    private RestTemplate restTemplate;
    
    public static String doPost(String url, String urlSuffix, Map body, String token){

        DefaultUriBuilderFactory factory = new DefaultUriBuilderFactory(url);
        factory.setEncodingMode(DefaultUriBuilderFactory.EncodingMode.TEMPLATE_AND_VALUES);
        restTemplate.setUriTemplateHandler(factory);
        HttpHeaders headers = new HttpHeaders();
        headers.add("token", token);

        HttpEntity requestEntity = new HttpEntity<>(body, headers);
        ResponseEntity responseEntity = restTemplate.postForEntity(urlSuffix,requestEntity , String.class);
        if(responseEntity.getStatusCode().is2xxSuccessful()){
            System.out.println(responseEntity.getBody());
        }else {
            System.out.println(responseEntity.getStatusCode().value()+ "和" + responseEntity.getBody());
        }
        return responseEntity.getBody();
    }
}

也就是线程@通过Autowired注入的方式调用会一直出现空指针异常
解决方案就是在晚上找一个获取bean的方法

@Component
public class SpringContextUtil implements ApplicationContextAware {
    
    private static ApplicationContext applicationContext;
 
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        SpringContextUtil.applicationContext = applicationContext;
    }
 
    
    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }
 
    
    public static Object getBean(String name) {
        if (applicationContext == null){
            throw new RuntimeException("applicationContext注入失败");
        }
        return getApplicationContext().getBean(name);
    }
 
    
    public static  T getBean(Class clazz) {
        if (applicationContext == null){
            throw new RuntimeException("applicationContext注入失败");
        }
        return getApplicationContext().getBean(clazz);
    }
 
    
    public static  T getBean(String name, Class clazz) {
        if (applicationContext == null){
            throw new RuntimeException("applicationContext注入失败");
        }
        return getApplicationContext().getBean(name, clazz);
    }
}

使用

RestTemplate restTemplate =  SpringContextUtil.getBean(ClientUtil.class)

线程中使用@Autowired注入

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