Spring mvc 过滤器

实现javax.servlet.Filter 接口  implements javax.servlet.Filter

重写里面的方法

package com.zhy.t502.utils;

import java.io.IOException;

import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

public class Filter implements javax.servlet.Filter {

    public void destroy() {
        // TODO Auto-generated method stub

    }

    public void doFilter(ServletRequest arg0, ServletResponse arg1,
            FilterChain arg2) throws IOException, ServletException {
        
            arg0.setCharacterEncoding("utf-8");//UTF-8过滤器
            
            
        arg2.doFilter(arg0, arg1);//放行
        
        
    }

    public void init(FilterConfig arg0) throws ServletException {
        // TODO Auto-generated method stub
    }

}

 然后 配置  web.xml

<filter>
    <filter-name>utf-8</filter-name>　　　　<!-- 名字 -->   
    <filter-class>com.zhy.t502.utils.Filter</filter-class> <!-- 文件路径 -->
</filter>
<filter-mapping>
    <filter-name>utf-8</filter-name>　　　　<!-- 名字 必须跟上面一致-->
    <url-pattern>/*</url-pattern>　　     <!--过滤范围 -->
</filter-mapping>