使用filter解决jsp乱码问题

jsp页面的编码要指定，并且跟下面配置的编码一致

<%@ page contentType="text/html;charset=UTF-8"%>

一.在web.xml中配置

xml 代码

   <filter>
        <filter-name>EncodingFilter</filter-name>
        <filter-class>com.kenshin.base.CharacterEncodingFilter</filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
        <init-param>
            <param-name>enable</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>EncodingFilter</filter-name>
        <url-pattern>*.do</url-pattern>
    </filter-mapping>

 

二.filter类代码

java 代码

package com.kenshin.base;

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 org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;

public class CharacterEncodingFilter implements Filter {
    protected String sEncodingName;

    protected FilterConfig sysFilter;

    protected boolean bEnable;

    protected Log logger = LogFactory.getLog(SysFilter.class);

    public void destroy() {

    }

    public void doFilter(ServletRequest arg0, ServletResponse arg1,
            FilterChain arg2) throws IOException, ServletException {
        // TODO Auto-generated method stub
        if (this.bEnable) {
            try {
                arg0.setCharacterEncoding(this.sEncodingName);
                arg1.setContentType("text/html;charset=" + this.sEncodingName);
                arg1.setCharacterEncoding(this.sEncodingName);
                arg2.doFilter(arg0, arg1);

            } catch (Exception e) {
                logger.info("出错了");
            }
            // session.close();
        } else {
            arg2.doFilter(arg0, arg1);
        }
    }

    public void init(FilterConfig arg0) throws ServletException {
        // TODO Auto-generated method stub
        this.sysFilter = arg0;
        this.loadFilterSetting();
    }

    private void loadFilterSetting() {
        this.sEncodingName = this.sysFilter.getInitParameter("encoding");
        logger.info("encoding:" + sEncodingName);
        String sEnable = this.sysFilter.getInitParameter("enable");
        if (sEnable != null && sEnable.equalsIgnoreCase("true")) {
            this.bEnable = true;
        } else {
            this.bEnable = false;
        }
    }


}