过滤器解决全站乱码

冷不防 2022-06-13 00:24 139阅读 0赞

创建一个过滤器，设置请求访问编码

package com.hongyi.filter;
    
    import java.io.IOException;
    
    import javax.servlet.Filter;
    import javax.servlet.FilterChain;
    import javax.servlet.FilterConfig;
    import javax.servlet.ServletException;
    import javax.servlet.ServletRequest;
    import javax.servlet.ServletResponse;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletRequestWrapper;
    import javax.servlet.http.HttpServletResponse;
    /** * 解决全站乱码问题 * @author 浪丶荡 * */
    public class CharacterEnCodingFilter implements Filter { 
    
    
        public void doFilter(ServletRequest req, ServletResponse resp,
                FilterChain chain) throws IOException, ServletException {
            HttpServletRequest request = (HttpServletRequest) req;
            HttpServletResponse response = (HttpServletResponse) resp;
            //对request/response进行预处理
            request.setCharacterEncoding("utf-8");
            response.setCharacterEncoding("utf-8");
            response.setContentType("text/html;charset-utf-8");
    
            MyCharacterEnCodingRequest requestWrapper = new MyCharacterEnCodingRequest(request);
    
            chain.doFilter(requestWrapper, response);
        }
    
        public void init(FilterConfig config) throws ServletException {
    
        }
        public void destroy() {
    
        }
    
    
    }
    class MyCharacterEnCodingRequest extends HttpServletRequestWrapper{
    
        private HttpServletRequest request;
        public MyCharacterEnCodingRequest(HttpServletRequest request) {
            super(request);
            this.request = request;
        }
        @Override
        public String getParameter(String name) {
            try {
                String value = this.request.getParameter(name);
                if(value==null){
                    return null;
                }
                if(this.request.getMethod().equalsIgnoreCase("post")){
                    return value;
                }else{
                    value = new String(value.getBytes("utf-8"),this.request.getCharacterEncoding());
                    return value;
                }
    
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }
    
    
    }

### 配置太简单，不贴代码了 ###