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~
importjava.io.IOException;
importjava.util.Collections;
importjava.util.Enumeration;
importjava.util.Map;
importjavax.servlet.FilterChain;
importjavax.servlet.ServletException;
importjavax.servlet.annotation.WebFilter;
importjavax.servlet.http.HttpServletRequest;
importjavax.servlet.http.HttpServletRequestWrapper;
importjavax.servlet.http.HttpServletResponse;
importorg.springframework.core.annotation.Order;
importorg.springframework.util.LinkedCaseInsensitiveMap;
importorg.springframework.web.filter.OncePerRequestFilter;
@Order(1)
//重点
@WebFilter(filterName="caseInsensitiveFilter",urlPatterns="/*")
publicclassCaseInsensitiveRequestParameterNameFilterextendsOncePerRequestFilter{
publicCaseInsensitiveRequestParameterNameFilter(){
System.out.println("CaseInsensitiveRequestParameterNameFilter.CaseInsensitiveRequestParameterNameFilter()");
}
@Override
protectedvoiddoFilterInternal(HttpServletRequestrequest,HttpServletResponseresponse,FilterChainfilterChain)
throwsServletException,IOException{
filterChain.doFilter(newCaseInsensitiveParameterNameHttpServletRequest(request),response);
}
publicstaticclassCaseInsensitiveParameterNameHttpServletRequestextendsHttpServletRequestWrapper{
privatefinalLinkedCaseInsensitiveMapmap=newLinkedCaseInsensitiveMap<>();
publicCaseInsensitiveParameterNameHttpServletRequest(HttpServletRequestrequest){
super(request);
map.putAll(request.getParameterMap());
}
@Override
publicStringgetParameter(Stringname){
String[]array=this.map.get(name);
if(array!=null&&array.length>0)
returnarray[0];
returnnull;
}
@Override
publicMapgetParameterMap(){
returnCollections.unmodifiableMap(this.map);
}
@Override
publicEnumerationgetParameterNames(){
returnCollections.enumeration(this.map.keySet());
}
@Override
publicString[]getParameterValues(Stringname){
returnthis.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":"121607691@qq.com"
}
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") privateStringDOI；
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毛票票。如有错误或未考虑完全的地方，望不吝赐教。