Filter过滤器，xml配置与页面不乱码整理

1.xml配置

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
  <display-name>filter</display-name>
  <filter>
    <filter-name>filter01</filter-name>
    <filter-class>com.myfilter.Filter01</filter-class>
    <init-param>
      <param-name>code</param-name>
      <param-value>utf-8</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>filter01</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

  <filter>
    <filter-name>filter02</filter-name>
    <filter-class>com.myfilter.Filter02</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>filter02</filter-name>
    <url-pattern>/pages/mainFilter.jsp</url-pattern>
  </filter-mapping>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
</web-app>

web.xml

2.过滤器1解析字符编码

/**
 *
 */
package com.myfilter;

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.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.lang3.StringUtils;

/**
 * @author Administrator
 *
 */
public class Filter01 implements Filter
{
    private String encoding=null;
    @Override
    public void destroy()
    {

    }

    @Override
    public void doFilter(ServletRequest arg0, ServletResponse arg1,
            FilterChain arg2) throws IOException, ServletException
    {
        HttpServletRequest request=(HttpServletRequest)arg0;
        HttpServletResponse response=(HttpServletResponse)arg1;
        request.setCharacterEncoding(encoding);
        response.setCharacterEncoding(encoding);
        response.setContentType("text/html charset="+encoding);
        arg2.doFilter(request, response);
        System.out.println(encoding);
    }

    @Override
    public void init(FilterConfig arg0) throws ServletException
    {
        String ww=arg0.getInitParameter("code");
        if(StringUtils.isNoneBlank(ww))
        {
            encoding=ww;
        }
    }

}

Filter01.java

3.过滤器2

package com.myfilter;

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 Filter02 implements Filter
{

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

    }

    @Override
    public void doFilter(ServletRequest arg0, ServletResponse arg1,
            FilterChain arg2) throws IOException, ServletException
    {
        System.out.println("第二个过滤器----00001");
        arg2.doFilter(arg0, arg1);
        System.out.println("第二个过滤器----00002");
    }

    @Override
    public void init(FilterConfig arg0) throws ServletException
    {
        System.out.println("02");
    }

}

Filter02.java