预览一-没加过滤器

预览二-加过滤器

 

 

项目目录

项目在  Servlet登录二 基础上进行  转码过滤器 扩展

public class EncodingFilter implements Filter {

    private String characterEncding;
    private boolean enabled;
    @Override
    public void destroy() {
        // TODO Auto-generated method stub
        characterEncding=null;
    }

    @Override
    public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2)
            throws IOException, ServletException {
        // TODO Auto-generated method stub
        if(enabled||characterEncding!=null)
        {
            arg0.setCharacterEncoding(characterEncding);
            arg1.setCharacterEncoding(characterEncding);
        }
        arg2.doFilter(arg0, arg1);
    }

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        // TODO Auto-generated method stub
        characterEncding=filterConfig.getInitParameter("characterEncding");
        enabled="true".equalsIgnoreCase(filterConfig.getInitParameter("enabled").trim());
    }
    
    

}

EncodingFilter.java

<filter>
      <filter-name>characterEncdingFilter</filter-name>
      <filter-class>com.yuanze.filter.EncodingFilter</filter-class>
      <init-param>
          <param-name>characterEncding</param-name>
          <param-value>UTF-8</param-value>
      </init-param>
      <init-param>
          <param-name>enabled</param-name>
          <param-value>true</param-value>
      </init-param>
  </filter>
  
  <filter-mapping>
      <filter-name>characterEncdingFilter</filter-name>
      <url-pattern>/*</url-pattern>
  </filter-mapping>

Web.xml过滤器配置

 

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提取码：8pzr