中文乱码问题解决，过滤器配置，get post提交乱码，filter,struts乱码，jsp乱码

<filter>
  <filter-name>encoding</filter-name>
  <filter-class>
  filter.FilterEncoding
  </filter-class>
  <init-param>
   <param-name>encoding</param-name>
   <param-value>gbk</param-value>
  </init-param>
 </filter>

<filter>
 <filter-name>encoding</filter-name>
 <filter-class>
  filter.FilterEncoding
 </filter-class>
 <init-param>
  <param-name>encoding</param-name>
  <param-value>gbk</param-value>
 </init-param>
</filter>

 

 

package filter;

 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 FilterEncoding implements Filter
{
  protected String encoding;          // 接收字符编码
  protected boolean ignore;            // 是否忽略大小写
  protected FilterConfig filterConfig; // 初始化配置

  public void init(FilterConfig filterConfig) throws ServletException
 {
   // 从web.xml文件中读取encoding的值
   encoding = filterConfig.getInitParameter("encoding");
   // 从web.xml文件中读取ignore的值
   String value = filterConfig.getInitParameter("ignore");
   // 以下三种情况均为忽略大小写
   if(value == null)
  {
    ignore = true;
  }
   else if(value.equalsIgnoreCase("yes"))
  {
    ignore = true;
  }
   else if(value.equalsIgnoreCase("true"))
  {
    ignore = true;
  }
 }
  // doFilter方法
  public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException
 {
   if(ignore || request.getCharacterEncoding() == null)
  {
    // 如果为空先从web.xml中得到
   String encoding = selectEncoding(request);
    if(encoding != null)
   {
     // 设置字符集编码
    request.setCharacterEncoding(encoding);
   }
  }
   // 继续执行
  chain.doFilter(request, response);
 }
  // 得到字符编码
  private String selectEncoding(ServletRequest request)
 {
   return encoding;
 }
  public void destroy()
 {

 }
}

package filter;

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 FilterEncoding implements Filter 
{ 
 protected String encoding;          // 接收字符编码
 protected boolean ignore;            // 是否忽略大小写
 protected FilterConfig filterConfig; // 初始化配置

 public void init(FilterConfig filterConfig) throws ServletException 
 {
  // 从web.xml文件中读取encoding的值
  encoding = filterConfig.getInitParameter("encoding"); 
  // 从web.xml文件中读取ignore的值
  String value = filterConfig.getInitParameter("ignore"); 
  // 以下三种情况均为忽略大小写
  if(value == null) 
  { 
   ignore = true; 
  }
  else if(value.equalsIgnoreCase("yes")) 
  { 
   ignore = true; 
  } 
  else if(value.equalsIgnoreCase("true")) 
  { 
   ignore = true; 
  } 
 } 
 // doFilter方法
 public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException 
 {
  if(ignore || request.getCharacterEncoding() == null) 
  {
   // 如果为空先从web.xml中得到
   String encoding = selectEncoding(request); 
   if(encoding != null) 
   {
    // 设置字符集编码
    request.setCharacterEncoding(encoding); 
   }
  }
  // 继续执行
  chain.doFilter(request, response); 
 } 
 // 得到字符编码
 private String selectEncoding(ServletRequest request) 
 { 
  return encoding; 
 } 
 public void destroy() 
 { 
  
 } 
}

 

如果是url的get提交参数带中文的
可以改下面这个文件，加入一个URIEncoding="GBK"
X:\Tomcat 5.5\conf\Server.xml 
 

<Connector
         port="8080"
         redirectPort="8443"
         minSpareThreads="25"
         connectionTimeout="30"
         maxThreads="150"
         maxSpareThreads="75"
 URIEncoding="GBK">

<Connector 
        port="8080" 
        redirectPort="8443" 
        minSpareThreads="25" 
        connectionTimeout="30" 
        maxThreads="150" 
        maxSpareThreads="75" 
URIEncoding="GBK"> 

 

jsp头文件

<%@ page contentType="text/html;charset=gbk"%>   //此处的charset的值要和web.xml里的  <param-value></param-value>值一样

<%@ page contentType="text/html;charset=gbk"%>   //此处的charset的值要和web.xml里的  <param-value></param-value>值一样

 

单个类的乱码可以这样来解决：tempStr = new String(str.getBytes("iso-8859-1"),"gb2312");