java中如何解决web项目上传出现乱码问题

package com.newview.bysj.filter;

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;

public class EncodingFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) 
    throws IOException, ServletException {
        HttpServletRequest httpServletRequest = (HttpServletRequest) servletRequest;
        //设置请求的字符集
        httpServletRequest.setCharacterEncoding("UTF-8");
        //将请求放行到目的地址
        filterChain.doFilter(servletRequest, servletResponse);
    }

    @Override
    public void destroy() {
    }
}

<!--定义Filter-->
    <filter>
        <display-name>EncodingFilter</display-name>
        <!--Filter的名字-->
        <filter-name>EncodingFilter</filter-name>
        <!--Filter的实现类-->
        <filter-class>com.newview.bysj.filter.EncodingFilter</filter-class>
    </filter>
    <!--定义Filter拦截的url-->
    <filter-mapping>
        <filter-name>EncodingFilter</filter-name>
        <!--Filter拦截的url-->
        <url-pattern>*.html</url-pattern>
    </filter-mapping>