之前，筆者寫了《使用Spring Cloud Feign上傳文件》。近日，有同事在對接遺留的Struts古董系統，需要使用Feign實現Form表單提交。其實步驟大同小異，本文附上步驟，算是對之前那篇的補充。
添加依賴：
<dependency> <groupId>io.github.openfeign.form</groupId> <artifactId>feign-form</artifactId> <version>3.2.2</version></dependency><dependency> <groupId>io.github.openfeign.form</groupId> <artifactId>feign-form-spring</artifactId> <version>3.2.2</version></dependency>
Feign Client示例：
@FeignClient(name = "xxx", url = "http://www.itmuch.com/", configuration = TestFeignClient.FormSupportConfig.class)public interface TestFeignClient { @PostMapping(value = "/test", consumes = {MediaType.APPLICATION_FORM_URLENCODED_VALUE}, produces = {MediaType.APPLICATION_JSON_UTF8_VALUE} ) void post(Map<String, ?> queryParam); class FormSupportConfig { @Autowired private ObjectFactory<HttpMessageConverters> messageConverters; // new一個form編碼器，實現支持form表單提交@Bean public Encoder feignFormEncoder() { return new SpringFormEncoder(new SpringEncoder(messageConverters)); } // 開啟Feign的日誌@Bean public Logger.Level logger() { return Logger.Level.FULL; } }}調用示例：
@GetMapping("/user/{id}")public User findById(@PathVariable Long id) { HashMap<String, String> param = Maps.newHashMap(); param.put("username","zhangsan"); param.put("password","pwd"); this.testFeignClient.post(param); return new User();}紀錄:
...[TestFeignClient#post] ---> POST http://www.baidu.com/test HTTP/1.1
...[TestFeignClient#post] Accept: application/json;charset=UTF-8
...[TestFeignClient#post] Content-Type: application/x-www-form-urlencoded; charset=UTF-8
...[TestFeignClient#post] Content-Length: 30
...[TestFeignClient#post]
...[TestFeignClient#post] password=pwd&username=zhangsan
...[TestFeignClient#post] ---> END HTTP (30-byte body)
由日誌可知，此時Feign已能使用Form表單方式提交數據。
參考文檔
https://github.com/OpenFeign/feign-form
https://stackoverflow.com/questions/35803093/how-to-post-form-url-encoded-data-with-spring-cloud-feign
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持武林網。