spring 基于注解过滤器Filter设置，解决中文乱码

首先写一个Filter类，实现接口Filter

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import java.io.IOException;

@WebFilter(filterName = "encodingFilter",urlPatterns = "/*")
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 {
        servletRequest.setCharacterEncoding("UTF-8");
        servletResponse.setCharacterEncoding("UTF-8");
        filterChain.doFilter(servletRequest,servletResponse);
    }
    @Override
    public void destroy() {

    }
}

然后注册 Filter 并将其映射到 DispatcherServlet ，重载AbstractAnnotationConfigDispatcherServletInitializer 的getServletFilters()

import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;

import javax.servlet.Filter;

public class MemorandumWebAInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {
    @Override
    protected Class[] getRootConfigClasses() {
        return new Class[]{RootConfig.class};
    }

    @Override
    protected Class[] getServletConfigClasses() {
        return new Class[]{WebConfig.class};
    }

    @Override
    protected String[] getServletMappings() {
        return new String[]{"/"};
    }

    @Override
    protected Filter[] getServletFilters() {
        return new Filter[]{new encodingFilter()};
    }
}