jsp+mysql的字符过滤器

jsp+mysql项目里面，在和数据库交互的时候，总是出现乱码。这都是老生常谈的事情了。

之前在那里放了一放，今天觉得还是尽早解决。用了一个过滤器。

代码：

package wang.util;

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;

public class EncodeFilter implements Filter {

    private String requestEncoding="";

    private String responseEncoding=""; 

    public void destroy() {

        // TODO Auto-generated method stub

        System.out.println("字符编码过滤器销毁！");

    }

    public void doFilter(ServletRequest request, ServletResponse response,    FilterChain filterChain) throws IOException, ServletException {

        // TODO Auto-generated method stub

         System.out.println("编码过滤器运行中。。。");

         request.setCharacterEncoding(requestEncoding);

         response.setContentType(responseEncoding);

         filterChain.doFilter(request, response);

    }

    public void init(FilterConfig arg0) throws ServletException {

        // TODO Auto-generated method stub

         System.out.println("字符编码过滤器初始化！");

         requestEncoding=arg0.getInitParameter("requestEncoding");

         responseEncoding=arg0.getInitParameter("responseEncoding");

    }

}

然后，web.xml配置一下

<!-- 编码过滤器开始 -->

 <filter>

  <filter-name>filterEncoding</filter-name>

  <filter-class>wang.util.EncodeFilter</filter-class>

  <init-param>

   <param-name>requestEncoding</param-name>

   <param-value>utf-8</param-value>

  </init-param>

  <init-param>

   <param-name>responseEncoding</param-name>

   <param-value>text/html;charset=utf-8</param-value>

  </init-param>

 </filter>

 <filter-mapping>

  <filter-name>filterEncoding</filter-name>

  <url-pattern>/*</url-pattern>

 </filter-mapping>

<!-- 编码过滤器结束 -->

怕再出问题，于是就再干脆点，连接的地方，也设定编码

private String dbUrl="jdbc:mysql://localhost:3306/mycows?useUnicode=true&characterEncoding=utf-8";

然后一切ok，也省的在每个servlet里面设置编码了。

巴特西

jsp+mysql的字符过滤器

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