package cn.silence.config;import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;/*** @author 你的名字*/
@WebFilter(filterName = "FirstFilter", urlPatterns = "/*")
public class PreBodyFilter implements Filter {@Overridepublic void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {if (request instanceof HttpServletRequest) {request.setCharacterEncoding("UTF-8");chain.doFilter(new HttpServletRequestWrapper((HttpServletRequest) request), response);} else {chain.doFilter(request, response);}}
}

启动类：@ServletComponentScan

package cn.silence.config;import org.springframework.util.StreamUtils;import javax.servlet.ReadListener;
import javax.servlet.ServletInputStream;
import javax.servlet.http.HttpServletRequest;
import java.io.*;/*** @author 你的名字*/
public class HttpServletRequestWrapper extends javax.servlet.http.HttpServletRequestWrapper {private final byte[] body;public HttpServletRequestWrapper(HttpServletRequest request) throws IOException {super(request);body = StreamUtils.copyToByteArray(request.getInputStream());}@Overridepublic ServletInputStream getInputStream() {InputStream bodyStream = new ByteArrayInputStream(body);return new ServletInputStream() {@Overridepublic int read() throws IOException {return bodyStream.read();}@Overridepublic boolean isFinished() {return false;}@Overridepublic boolean isReady() {return true;}@Overridepublic void setReadListener(ReadListener readListener) {}};}@Overridepublic BufferedReader getReader() {return new BufferedReader(new InputStreamReader(getInputStream()));}
}