记一次feign调用400，参数过长导致，修改解决

feign客户端

@PostMapping("/website/checkChooseColumn")
boolean checkChooseColumn(@RequestParam("chooseColumn") String chooseColumn);

服务端

@PostMapping("/checkChooseColumn")
public boolean checkChooseColumn(@RequestParam("chooseColumn") String chooseColumn){}

当chooseColumn 字符串过长时，feign调用会报错400。原因大概是因为

Feign默认将@RequestParam参数作为查询参数（Query Param）拼接到URL中，而非放入请求体。当chooseColumn字符串过长时，会导致URL超过服务器允许的最大长度，从而引发400 Bad Request错误‌。

解决方案：

改用@RequestBody传递参数

‌客户端修改：‌

@PostMapping("/website/checkChooseColumn")

boolean checkChooseColumn(@RequestBody String chooseColumn);

‌服务端修改：‌

@PostMapping("/checkChooseColumn")

public boolean checkChooseColumn(@RequestBody String chooseColumn) {}

此时新的问题又出现了。服务端接收到的中文是乱码

解决方案：

@PostMapping(value = "/website/checkChooseColumnNewFunction", consumes = "application/json;charset=UTF-8")
boolean checkChooseColumnNewFunction(@RequestBody String chooseColumn);

@PostMapping(value = "/checkChooseColumnNewFunction", consumes = "application/json;charset=UTF-8" )
public boolean checkChooseColumnNewFunction(@RequestBody String storySyncColumns){}