Servlet解决中文乱码问题

最新推荐文章于 2022-07-18 10:16:31 发布

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最新推荐文章于 2022-07-18 10:16:31 发布

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文章标签： tomcat

本文链接：https://blog.youkuaiyun.com/qq_46054356/article/details/124141322

本文介绍了如何在Servlet中设置响应的字符集，确保内容正确显示。通过resp.setContentType(text/html;charset=UTF-8)进行设置，并强调了必须在输出内容前设置。此外，还展示了使用@WebFilter注解的CharacterFilter过滤器实现全局的字符集设定，进一步确保了字符编码的一致性。

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直接设置servlet的response的字符集

resp.setContentType(“text/html;charset=UTF-8”);

@WebServlet("/getDate")
public class DateServlet extends HttpServlet {
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    	resp.setContentType("text/html;charset=UTF-8");
        LocalDateTime now = LocalDateTime.now();
        DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH-mm-ss");
        String nowTimeString = dateTimeFormatter.format(now);
        PrintWriter writer = resp.getWriter();
        writer.write("当前的时间是：" + nowTimeString + "\n");
    }
}

可以使用Filter过滤器

@WebFilter("/*")
public class CharacterFilter implements Filter {
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        response.setContentType("text/html;charset=UTF-8");
        filterChain.doFilter(request, response);
    }
}