ssh之雇员管理系统（6）-解决中文乱码问题

五、解决中文乱码问题

1. 第一种方法是自己写的Filter

建立包com.wang.web.filter      在包下建立一个servlet为MyFilter让其实现Filter接口，是javax.servlet.Filter的接口

package com.wang.web.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServlet;

public class MyFilter extends HttpServlet implements Filter {

    public void doFilter(ServletRequest arg0, ServletResponse arg1,
            FilterChain arg2) throws IOException, ServletException {
        arg0.setCharacterEncoding("utf-8");
        arg2.doFilter(arg0, arg1);

    }

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

    }
    
}

• web.xml中药配置啦这个Filter

  <!-- 配置Filter解决中文乱码问题 -->
      <servlet>
          <description>This is the description of my J2EE component</description>
          <display-name>This is the display name of my J2EE component</display-name>
          <servlet-name>MyFilter</servlet-name>
          <servlet-class>com.wang.web.filter.MyFilter</servlet-class>
      </servlet>
      <servlet-mapping>
          <servlet-name>MyFilter</servlet-name>
          <url-pattern>/*</url-pattern>
      </servlet-mapping>

     2.第二种方法是根据spring的Filter  。使用spring框架提供的处理中文乱码的过滤器

• 在web.xml中配置

  <filter>
      <filter-name>encoding</filter-name>
      <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
      <init-param>
          <param-name>encoding</param-name>
          <param-value>UTF-8</param-value>
      </init-param>
  </filter>
  <filter-mapping>
      <filter-name>encoding</filter-name>
      <url-pattern>/*</url-pattern>
  </filter-mapping>