Spring注記フィルタFilter設定に基づいて、中国語の文字化けしを解決する

まずFilterクラスを書き、インタフェースFilterを実現する.

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() {

    }
}

その後、Filterを登録し、DispatcherServletにマッピングし、AbstractAnnotationConfigDispatcherServletInitializerのgetServletFilters()を再ロードする.

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()};
    }
}