Get Parameter Encoding

Question

我在GET请求中使用spring mvc和特殊字符时遇到问题。请考虑以下方法：

@RequestMapping("/update")
public Object testMethod(@RequestParam String name) throws IOException {
    }

例如，我向其发送名称包含“ä”（德语为umlaut）的GET请求。由于浏览器将“ä”映射到，因此它会在Spring收到“ä” %C3%A4。

因此，如何获得控制器的正确编码字符串？

谢谢你的帮助！

Answer 1

在你的web.xml中：

    <filter>
        <filter-name>CharacterEncodingFilter</filter-name>
        <filter-class>com.example.CharacterEncodingFilter</filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
    </filter>

    <filter-mapping>
        <filter-name>CharacterEncodingFilter</filter-name>
        <servlet-name>dispatcher</servlet-name>
    </filter-mapping>

com.example.CharacterEncodingFilter：

public class CharacterEncodingFilter implements Filter {

    protected String encoding;

    public void init(FilterConfig filterConfig) throws ServletException {
        encoding = filterConfig.getInitParameter("encoding");
    }

    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse,
            FilterChain filterChain) throws IOException, ServletException {

        HttpServletRequest request = (HttpServletRequest) servletRequest;
        request.setCharacterEncoding(encoding);

        filterChain.doFilter(servletRequest, servletResponse);
    }

    public void destroy() {
        encoding = null;
    }

}