解決JSP開(kāi)發(fā)Web程序中文顯示三種方法

方法一：最簡(jiǎn)單也是用的最多的方法
    ＜%@ page language="java" pageEncoding="GBK" %＞
    或者＜%@ page contenttype="text/html;charset=gbk";＞這里可以用gb2312或者gbk，只是gbk比gb2312支持跟多的字符。
    這個(gè)方法用于jsp頁(yè)面中的中文顯示。
    方法二：使用過(guò)濾器
    過(guò)濾器使用主要針對(duì)表單提交，插入數(shù)據(jù)庫(kù)的數(shù)據(jù)都是？號(hào)。這也是應(yīng)為tomcat不按request所指定的編碼進(jìn)行編碼，還是自作主張的采用默認(rèn)編碼方式iso-8859-1編碼。
    編寫(xiě)一個(gè)SetCharacterEncodingFilter類。
    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 SetCharacterEncodingFilter implements Filter {
    protected String encoding = null;
    protected FilterConfig filterConfig = null;
    protected boolean ignore = true;
    public void init(FilterConfig filterConfig) throws ServletException {
    　this.filterConfig=filterConfig;
    　this.encoding=filterConfig.getInitParameter("encoding");
    　String value=filterConfig.getInitParameter("ignore");
    　if(value==null)
    this.ignore=true;
    　else if(value.equalsIgnoreCase("true"))
    this.ignore=true;
    　else
    this.ignore=false;
    }
    public void doFilter(
    ServletRequest request, ServletResponse response, FilterChain chain)
     throws IOException, ServletException {
    // TODO 自動(dòng)生成方法存根
    if (ignore 　　 (request.getCharacterEncoding() == null)) {
    　String encoding = selectEncoding(request);
    　if (encoding != null)
    request.setCharacterEncoding(encoding);
    }
    chain.doFilter(request, response);
    }
    public void destroy() {
    // TODO 自動(dòng)生成方法存根
    this.encoding = null;
    this.filterConfig = null;
    }
    protected String selectEncoding(ServletRequest request) {
    return (this.encoding);
    }
    }