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  • 使用RestTemplate发送post请求

    最近使用RestTemplate发送post请求,遇到了很多问题,如转换httpMessage失败、中文乱码等,调了好久才找到下面较为简便的方法:

    RestTemplate restTemplate = new RestTemplate();
            HttpHeaders headers = new HttpHeaders();
            MediaType type = MediaType.parseMediaType("application/json; charset=UTF-8");
            headers.setContentType(type);
            headers.add("Accept", MediaType.APPLICATION_JSON.toString());
            
            JSONObject jsonObj = JSONObject.fromObject(params);
            
            HttpEntity<String> formEntity = new HttpEntity<String>(jsonObj.toString(), headers);
    
            String result = restTemplate.postForObject(url, formEntity, String.class);

    如果直接使用在postForObject中把对象传入很容易出现no suitable HttpMessageConverter found for request type的错误,建议直接先转成字符串,见jsonObj.otString(),
    网上有人说设置RestTemplate的HttpMessageConverter,试了一下要引入各种包。
    另外要注意中文编码问题,网上有人说StringHttpMessageConverter默认使用ISO-8859-1,要指定为UTF-8编码,自己尝试没有成功,最后通过指定contentType的方式解决了。

    http://liuxing.info/2015/05/21/RestTemplate实践/

    http://www.cnblogs.com/zemliu/archive/2013/07/28/3220517.html

     /**
            *
            * This is going to setup the REST server configuration in the applicationContext
            * you can see that I am using the new Spring's Java Configuration style and not some OLD XML file
            *
            */
           ApplicationContext context = new AnnotationConfigApplicationContext(RESTConfiguration.class);
    
           /**
            *
            * We now get a RESTServer bean from the ApplicationContext which has all the data we need to
            * log into the REST service with.
            *
            */
           RESTServer mRESTServer = context.getBean(RESTServer.class);
    
           /**
            *
            * Setting up BASIC Authentication access
            *
            */
    
            HttpClient client = new HttpClient();
           UsernamePasswordCredentials credentials =
                   new UsernamePasswordCredentials(mRESTServer.getUser(), mRESTServer.getPassword());
    
           client.getState().setCredentials(
                   new AuthScope(mRESTServer.getHost(), 8080, AuthScope.ANY_REALM),
                   credentials);
    
           CommonsClientHttpRequestFactory commons = new CommonsClientHttpRequestFactory(client);
    
    
    
           /**
            *
            * Setting up data to be sent to REST service
            *
            */
           Map<String, String> vars = new HashMap<String, String>();
           vars.put("id", "INID");
    
           /**
            *
            * Doing the REST call and then displaying the data/user object
            *
            */
           try
           {
    
               /*
    
                   This is code to post and return a user object
    
                */
    
               RestTemplate rt = new RestTemplate(commons); // Added the CommonsClientHttpRequestFactory
    
               rt.getMessageConverters().add(new MappingJacksonHttpMessageConverter());
               rt.getMessageConverters().add(new StringHttpMessageConverter());
    
               String uri = new String("http://" + mRESTServer.getHost() + ":8080/springmvc-resttemplate-auth-test/api/{id}");
    
               User u = new User();
               u.setName("Johnathan M Smith");
               u.setUser("JMS");
    
    
               User returns = rt.postForObject(uri, u, User.class, vars);
    
               LOGGER.debug("User:  " + u.toString());

    https://github.com/JohnathanMarkSmith/springmvc-resttemplate-auth-test

            /**
             *
             * This is going to setup the REST server configuration in the applicationContext
             * you can see that I am using the new Spring's Java Configuration style and not some OLD XML file
             *
             */
            ApplicationContext context = new AnnotationConfigApplicationContext(RESTConfiguration.class);
    
            /**
             *
             * We now get a RESTServer bean from the ApplicationContext which has all the data we need to
             * log into the REST service with.
             *
             */
            RESTServer mRESTServer = context.getBean(RESTServer.class);
    
    
    
            /**
             *
             * Setting up data to be sent to REST service
             *
             */
            Map<String, String> vars = new HashMap<String, String>();
            vars.put("id", "JS01");
    
    
    
    
            /**
             *
             * Doing the REST call and then displaying the data/user object
             *
             */
    
    
            try
            {
    
                /*
    
                    This is code to post and return a user object
    
                 */
    
                RestTemplate rt = new RestTemplate();
                rt.getMessageConverters().add(new MappingJacksonHttpMessageConverter());
                rt.getMessageConverters().add(new StringHttpMessageConverter());
    
                String uri = new String("http://" + mRESTServer.getHost() + ":8080/springmvc-resttemplate-test/api/{id}");
    
                User u = new User();
                u.setName("Johnathan M Smith");
                u.setUser("JS01");
    
    
                User returns = rt.postForObject(uri, u, User.class, vars);
                LOGGER.debug("User:  " + u.toString());

    https://github.com/JohnathanMarkSmith/springmvc-resttemplate-test

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  • 原文地址:https://www.cnblogs.com/softidea/p/5849851.html
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