1:比较土鳖的方式

String name = req.getParameter("name");

name = new String(name.getBytes("iso-8859-1"),"GBK");

2:土鳖方式另一个

req.setCharacterEncoding(encoding);

res.setContentType("text/html;charset="+encoding);

3:比较正规的用Filter过滤

 配置xml

 <!-- filter xml 配置 -->
 
  <filter>
   <filter-name>MyFilter</filter-name>
   <filter-class>com.xiaofu.filter.MyFilter</filter-class>
   <init-param>
    <param-name>encoding</param-name>
    <param-value>GBK</param-value>
   </init-param>
  </filter>
 
  <filter-mapping>
   <filter-name>MyFilter</filter-name>
   <url-pattern>/*</url-pattern>
 <dispatcher>FORWARD</dispatcher>   
 <dispatcher>REQUEST</dispatcher>
  </filter-mapping>

 Myfilter类

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 MyFilter implements Filter {

 private String encoding = null;
 private FilterConfig filterConfig = null;
 
 public void destroy() {
  this.encoding = null;
  this.filterConfig = null;
 }

 public void doFilter(ServletRequestservletReq,ServletResponseservletRes,
   FilterChain chain) throws IOException, ServletException {
  if(filterConfig!=null){
   servletReq.setCharacterEncoding(encoding);
   servletRes.setContentType("text/html;charset="+encoding);
  }
  chain.doFilter(servletReq, servletRes);
 }

 public void init(FilterConfigfilterConfig) throws ServletException {
  this.filterConfig = filterConfig;
  this.encoding = filterConfig.getInitParameter("encoding");
 }

}

 

4:Mysql数据库乱码(改完记得重启)

--1步

在D:\MySql下有个my.ini文件编辑打开

找到里面的default-storage-set=XXX(这个东西有的有两个,有的有一个,有几个改几个

XXX可以替换为utf-8  或者 gbk(首选)

--2步

当在mysql的控制台输入汉字后插入,select后仍然乱码

在控制台输入set names gbk;

 

5:建表时候设置表编码

--建库

create database 'test' default character set gbk;

--使用库test

use test

--在test库里面建表students

create table students(id int);

此时students表的编码为gbk