servlet 乱码过滤器，解决ajax上传的时候乱码

最新推荐文章于 2025-09-06 09:33:29 发布

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最新推荐文章于 2025-09-06 09:33:29 发布

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文章标签： java

原文链接：https://my.oschina.net/wjgood/blog/90438

本文介绍了一个自定义的Spring Web过滤器AjaxPostFilter，该过滤器主要用于处理AJAX POST请求，并根据不同的请求类型设置字符编码为UTF-8或其他指定编码。

package com.cc.keywordrank.filter;

import java.io.IOException;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.Logger;
import org.springframework.web.filter.OncePerRequestFilter;

public class AjaxPostFilter extends OncePerRequestFilter {
	private static Logger logger = Logger.getLogger(AjaxPostFilter.class);
	private static final String IE_CONTENT_TYPE = "application/x-www-form-urlencoded";
	private static final String FF_AJAX_CONTENT_TYPE = "application/x-www-form-urlencoded; charset=UTF-8";
	private static final String XMLHTTP_REQUEST = "XMLHttpRequest";
	private static final String AJAX_CHARACTER_ENCODING_UTF8 = "UTF-8";

	
	private String encoding;

	private boolean forceEncoding = false;
	
	public void setEncoding(String encoding) {
		this.encoding = encoding;
	}

	
	public void setForceEncoding(boolean forceEncoding) {
		this.forceEncoding = forceEncoding;
	}


	@Override
	protected void doFilterInternal(
			HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
			throws ServletException, IOException {
		String requestedWith = request.getHeader("x-requested-with");
		String type = request.getContentType();
		if (XMLHTTP_REQUEST.equals(requestedWith)&& (FF_AJAX_CONTENT_TYPE.equals(type)
				||IE_CONTENT_TYPE.equals(type))) {
			request.setCharacterEncoding(AJAX_CHARACTER_ENCODING_UTF8);
			response.setCharacterEncoding(AJAX_CHARACTER_ENCODING_UTF8);
		}else if(type!=null && type.indexOf("multipart/form-data;") != -1){
			request.setCharacterEncoding(AJAX_CHARACTER_ENCODING_UTF8);
			response.setCharacterEncoding(AJAX_CHARACTER_ENCODING_UTF8);
		}else if (this.encoding != null && (this.forceEncoding || request.getCharacterEncoding() == null)) {
			request.setCharacterEncoding(this.encoding);
			if (this.forceEncoding) {
				response.setCharacterEncoding(this.encoding);
			}
		}
		filterChain.doFilter(request, response);
	}

}

转载于:https://my.oschina.net/wjgood/blog/90438