问题描述

springmvc拦截器拦截可以处理非法字符吗？

我拦截请求，并对请求的参数做了过滤 如图：

然后到了controller里面 参数并没有改变 ，请问是我解决方法的问题吗？这种方法行的通吗？还是少了些东西？谢谢大神

解决方案

你这个拦截器有没有配置呢，调试下这个拦截器的代码有没有执行呢？

解决方案二：

你的拦截器进去了没啊？参考 http://examples.javacodegeeks.com/enterprise-java/spring/mvc/spring-mvc-handler-interceptors-example/

解决方案三：

我确定拦截器在controller之前已经进去了

解决方案四：

建议在HttpServletRequestWrapper https://tomcat.apache.org/tomcat-5.5-doc/servletapi/javax/servlet/http/HttpServletRequestWrapper.html 中处理

http://stackoverflow.com/questions/27504696/how-to-change-the-posted-values-with-a-spring-mvc-interceptor

 I answer my own question. In fact it is rather complex and it took me some time to find a working solution. First, I created a filter in a Spring configuration class (Spring Boot environment exactly) :

@Configuration
@ComponentScan({ "istia.st.springmvc.config", "istia.st.springmvc.controllers", "istia.st.springmvc.models" })
@EnableAutoConfiguration
public class Config extends WebMvcConfigurerAdapter {
    @Bean
    public Filter cultureFilter() {
        return new CultureFilter();
    }

}
Here we declare a filter that will (by default) filter every request before it attains the final handler. Then I created the filter :

public class CultureFilter extends OncePerRequestFilter {

    @Override
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
            throws ServletException, IOException {
        // next handler
        filterChain.doFilter(new CultureRequestWrapper(request), response);
    }
}
[OncePerRequestFilter] is a Spring class. The trick is to replace the actual request with a new one [CultureRequestWrapper(request)]. Then I created the CultureRequestWrapper :

public class CultureRequestWrapper extends HttpServletRequestWrapper {

    public CultureRequestWrapper(HttpServletRequest request) {
        super(request);
    }

    @Override
    public String[] getParameterValues(String name) {
        // posted values a et b
        if (name != null && (name.equals("a") || name.equals("b"))) {
            String[] values = super.getParameterValues(name);
            String[] newValues = values.clone();
            newValues[0] = newValues[0].replace(",", ".");
            return newValues;
        }
        // other cases
        return super.getParameterValues(name);
    }

}
I redefined the [getParameterValues] of [HttpServletRequest] but it depends on the final servlet that will manage the request. We have to redefine the [HttpServletRequest] methods used by this servlet.

解决方案五：

应该 用 OncePerRequestFilter 过滤在 http://blog.csdn.net/geloin/article/details/7445441

解决方案六：

spring 拦截去可以修改request 内容吗？