使用过滤器配置字符集

配置信息采用注释方式

import org.thymeleaf.util.StringUtils;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.annotation.WebInitParam;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
@WebFilter(urlPatterns = {"*"},initParams = {@WebInitParam(name="encoding",value="GBK")})
public class characterEncodingFilter implements Filter {
    private String encoding="UTF-8";
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        String encodingStr=filterConfig.getInitParameter("encoding");
        if(StringUtils.isEmpty(encodingStr)){
            encoding=encodingStr;
        }
    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        ((HttpServletRequest)servletRequest).setCharacterEncoding(encoding);
        filterChain.doFilter(servletRequest, servletResponse);
    }

    @Override
    public void destroy() {

    }
}