SpringBoot 请求参数忽略大小写的实例

我就废话不多说了，大家还是直接看代码吧~

import java.io.ioexception;
import java.util.collections;
import java.util.enumeration;
import java.util.map; 
import javax.servlet.filterchain;
import javax.servlet.servletexception;
import javax.servlet.annotation.webfilter;
import javax.servlet.http.httpservletrequest;
import javax.servlet.http.httpservletrequestwrapper;
import javax.servlet.http.httpservletresponse; 
import org.springframework.core.annotation.order;
import org.springframework.util.linkedcaseinsensitivemap;
import org.springframework.web.filter.onceperrequestfilter;
 
@order(1)
//重点
@webfilter(filtername = "caseinsensitivefilter", urlpatterns = "/*")
public class caseinsensitiverequestparameternamefilter extends onceperrequestfilter {
 
	public caseinsensitiverequestparameternamefilter() {
		system.out.println("caseinsensitiverequestparameternamefilter.caseinsensitiverequestparameternamefilter()");
	}
	
 @override
 protected void dofilterinternal(httpservletrequest request, httpservletresponse response, filterchain filterchain)
  throws servletexception, ioexception {
 filterchain.dofilter(new caseinsensitiveparameternamehttpservletrequest(request), response);
 }
 
 public static class caseinsensitiveparameternamehttpservletrequest extends httpservletrequestwrapper {
 private final linkedcaseinsensitivemap<string[]> map = new linkedcaseinsensitivemap<>();
 
 public caseinsensitiveparameternamehttpservletrequest(httpservletrequest request) {
  super(request);
  map.putall(request.getparametermap());
 }
 
 @override
 public string getparameter(string name) {
 
  string[] array = this.map.get(name);
  if (array != null && array.length > 0)
  return array[0];
  return null;
 }
 
 @override
 public map<string, string[]> getparametermap() {
  return collections.unmodifiablemap(this.map);
 }
 
 @override
 public enumeration<string> getparameternames() {
  return collections.enumeration(this.map.keyset());
 }
 
 @override
 public string[] getparametervalues(string name) {
  return this.map.get(name);
 }
 
 }
 
}

并在启动类上加入@servletcomponentscan注解

补充：springboot 接受大写参数时，接收值为空的解决

入参：

{
 "title":"文章标题1",
 "content":"文章内容22222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222",
 "doi":"123",
 "pmid":"1234",
 "email":"[e-mail]"
}

springboot 接到的doi和pmid 为null，头字母改为小写后正常。

原因及解决

是spring 使用@requestbody 接收时遵循驼峰命名规则，如果希望接收非驼峰的参数可以在对映的属性上添加注解

@jsonproperty(value = "doi")
private string doi；

以上为个人经验，希望能给大家一个参考，也希望大家多多支持。如有错误或未考虑完全的地方，望不吝赐教。