resttemplate

Ribbon常用注解及配置

给你一囗甜甜゛ 提交于 2019-12-01 10:06:40
Ribbon在服务调用方使用 常用注解及范例: 主类中:@Bean@LoadBalanced  //在RestTemplate上加入负载均衡注解public RestTemplate restTemplate(){ return new RestTemplate();}服务调用代码:@GetMapping("{id}")public User queryById(@PathVariable("id") Long id){ String url = "http://user-server/user/"+id; User user = restTemplate.getForObject(url, User.class); return user;} 来源: https://www.cnblogs.com/WaterGe/p/11678778.html

Java: Deserialize a json to object in rest template using “@class” in json -SpringBoot

依然范特西╮ 提交于 2019-12-01 10:05:55
问题 I have to instantiate a class which extends the abstract class from JSON using information in @class as shown below. "name": { "health": "xxx", "animal": { "_class": "com.example.Dog", "height" : "20" "color" : "white" } }, Here the abstract class is animal and dog extends the animal class. So using the information in @class, can we instantiate dog directly. Also this is the response I am getting in restTemplate ResponseEntity<List<SomeListName>> response = restTemplate.exchange("http://10

HttpMessageConverter exception : RestClientException: Could not write request: no suitable HttpMessageConverter found

社会主义新天地 提交于 2019-12-01 09:31:50
I am writing a client to consume a RESTful service. I am required to send the request in key, value pair, they suggested that I use a Map for this. The RESTful service that I am calling is only going to accept JSON and my client is going to be in Java. It is actually going to be part of an existing enterprise EJB project. I have written up a client and am able to call the RESTful service successfully. In fact, if I send the request in String (JSON format) then I even get a response back. But I would like to avoid this manual work of converting the Map into a JSON format string and then sending

RestTemplate usage

|▌冷眼眸甩不掉的悲伤 提交于 2019-12-01 09:19:33
I'm trying to use RestTemplate in order to make a PUT . For some reason I can't reproduce the PUT I created using curl that goes through without any problems. Here is my curl call that succeeds and returns 200: curl https://www.exampe.com \ -X PUT \ -H "Content-Type: application/json" \ -H "Authorization: Bearer <bearer-token>" \ -v \ -d '{"json":"object"}' And here is Java code that tried to replicate this curl call. This code in my case will throw HttpClientErrorException with status = 406: boolean result = false; String url = "https://www.example.com"; String json = "{\"json\":\"object\"}";

Sending file over spring rest service via resttemplate

给你一囗甜甜゛ 提交于 2019-12-01 09:03:15
问题 Title might look common but none of them fit in my issue. I have a rest service which accept normal parameters and file in form of multipart. i want to use resttemplate to send data and file to above rest service. till the time i was sending normal string data there was no issue. once i add code of sending bytes then i start getting 400 Bad request error. if i comment code to send ByteArrayResource then it start working for normal parameters. below is sample code Rest service controller

HttpMessageConverter exception : RestClientException: Could not write request: no suitable HttpMessageConverter found

情到浓时终转凉″ 提交于 2019-12-01 09:00:28
问题 I am writing a client to consume a RESTful service. I am required to send the request in key, value pair, they suggested that I use a Map for this. The RESTful service that I am calling is only going to accept JSON and my client is going to be in Java. It is actually going to be part of an existing enterprise EJB project. I have written up a client and am able to call the RESTful service successfully. In fact, if I send the request in String (JSON format) then I even get a response back. But

SpringCloud-创建服务消费者-Ribbon方式(附代码下载)

元气小坏坏 提交于 2019-12-01 08:59:24
场景 SpringCloud-服务注册与实现-Eureka创建服务注册中心(附源码下载): https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/102535957 SpringCloud-服务注册与实现-Eureka创建服务提供者(附源码下载): https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/102558004 在上面已经实现服务注册中心和服务提供者的基础上,再创建服务消费者,即使用上面提供服务的一方。 注: 博客: https://blog.csdn.net/badao_liumang_qizhi 关注公众号 霸道的程序猿 获取编程相关电子书、教程推送与免费下载。 实现 参考上面构建项目的方式,依次建立目录hello-spring-cloud-web-admin-ribbon目录以及在 目录下新建pom.xml,并将其托管。然后新建src/main/java目录和src/main/resources目录并分别进行目录设置。 然后在java下新建包,包下新建启动类,在resources下新建配置文件application.yml。 完成后的目录为: pom.xml代码: <?xml version="1.0" encoding="UTF-8"?>

接口开发中的 RestTemplate

怎甘沉沦 提交于 2019-12-01 08:31:43
最近使用Spring 的 RestTemplate 工具类请求接口的时候发现参数传递的一个坑,也就是当我们把参数封装在Map里面的时候,Map 的类型选择。 使用RestTemplate post请求的时候主要可以通过三种方式实现 1、调用postForObject方法 2、使用postForEntity方法 3、调用exchange方法 postForObject和postForEntity方法的区别主要在于可以在postForEntity方法中设置header的属性,当需要指定header的属性值的时候,使用postForEntity方法。exchange方法和postForEntity类似,但是更灵活,exchange还可以调用get、put、delete请求。使用这三种方法调用post请求传递参数,Map不能定义为以下两种类型(url使用占位符进行参数传递时除外) Map<String, Object> paramMap = new HashMap<String, Object>(); Map<String, Object> paramMap = new LinkedHashMap<String, Object>(); 经过测试,我发现这两种map里面的参数都不能被后台接收到,这个问题困扰我两天,终于,当我把Map类型换成LinkedMultiValueMap后

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自作多情 提交于 2019-12-01 07:58:55
一、简介 在Spring-Boot项目开发中,存在着本模块的代码需要访问外面模块接口,或外部url链接的需求,针对这一需求目前存在着三种解决方案,下面将对这三种方案进行整理和说明。 二、Spring-Boot项目中访问外部接口 2.1 方案一 采用原生的Http请求 在代码中采用原生的http请求,代码参考如下: @RequestMapping("/doPostGetJson") public String doPostGetJson() throws ParseException { //此处将要发送的数据转换为json格式字符串 String jsonText = "{id:1}"; JSONObject json = (JSONObject) JSONObject.parse(jsonText); JSONObject sr = this.doPost(json); System.out.println("返回参数:" + sr); return sr.toString(); } public static JSONObject doPost(JSONObject date) { HttpClient client = HttpClients.createDefault(); // 要调用的接口方法 String url = "http://192.168.1.101

spring cloud 服务容错保护 - Hystrix

旧街凉风 提交于 2019-12-01 07:06:00
1、为什么要断路器   在微服务架构中通常会涉及到多个服务间调用,处于调用链路底层的基础服务故障可能会导致级联故障,进而造成整个系统不可用的情况,这种现象被称为服务雪崩效应。服务雪崩效应是一种因“服务提供者”的不可用导致“服务消费者”的不可用,并将不可用范围逐渐放大的过程。 大家在开发过程中肯定都遇到了 HTTP Connection Timeout 异常,这其实也是一种熔断器概念,当连接请求一直连不上超时就结束了请求并抛出异常。 2、简单的断路器 添加pom依赖 <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-ribbon</artifactId> </dependency> 新建hystrix-server项目,在入口处新增@SpringCloudApplication: @SpringCloudApplication public class HystrixApplication { public static void main(String[] args) { SpringApplication.run( HystrixApplication.class, args ); } /** * 实例化RestTemplate,通过