原文：http://www.itmuch.com/spring-cloud-sum/feign-form-params/
之前，笔者写了《使用Spring Cloud Feign上传文件》。近日，有同事在对接遗留的Struts古董系统，需要使用Feign实现Form表单提交。其实步骤大同小异，本文附上步骤，算是对之前那篇的补充。
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添加依赖：
<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一个form编码器，实现支持form表单提交 @Bean public Encoder feignFormEncoder() { return new SpringFormEncoder(new SpringEncoder(messageConverters)); } // 开启Feign的日志 @Bean public Logger.Level logger() { return Logger.Level.FULL; } } } -
调用示例：
@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(); } -
日志：
...[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)由日志可知，此时Feign已能使用Form表单方式提交数据。
