这篇文章主要介绍了SpringBoot 请求参数忽略大小写的实例，具有很好的参考价值，希望对大家有所帮助。一起跟随小编过来看看吧
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 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 getParameterMap() { return Collections.unmodifiableMap(this.map); } @Override public Enumeration 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":"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") 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html中文网。如有错误或未考虑完全的地方，望不吝赐教。
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