JSP乱码问题,请高手帮忙.

Question

   插入数据库后乱码,MySQl数据库,编码是utf-8,我也JSP页面也是utf-8.是乱码.我改成gb2312后,还是乱码,真是郁闷!

Answer 1

设置过滤器.......1、到你Tomcat 5.0\webapps\servlets-examples\WEB-INF\classes\filters下找到SetCharacterEncodingFilter.java这个文件。
2、把SetCharacterEncodingFilter.java放到你的工程代码中。
3、设置web.xml
    <filter>
     <filter-name>Set Character Encoding </filter-name>
     <filter-class>你的包.SetCharacterEncodingFilter </filter-class>
     <init-param>
       <param-name>encoding </param-name>
       <param-value>UTF-8 </param-value>
     </init-param>
     <init-param>
       <param-name>ignore </param-name>
       <param-value>true </param-value>
     </init-param>
   </filter>
   <filter-mapping>
     <filter-name>Set Character Encoding </filter-name>
     <servlet-name>action </servlet-name>
   </filter-mapping>

Answer 2

插入db后乱码，那发生在页面编码上，request获得页面编码的时候，设置过滤器可以解决

Answer 3

但是需要指出的是 这种filter解决的是表单post时候的编码转换
对于GET方法提交,定位到你Tomcat安装目录下的conf目录,打开conf目录下的server.xml文件,找到对JSP网页端口(默认为 8080)进行服务的Connector组件的设置部分,给该Connector组件添加一个属性:URIEncoding="GBK".修改后的 Connector组件如下:
    <Connector  port="9080"  maxHttpHeaderSize="8192"
               maxThreads="150" minSpareThreads="25" maxSpareThreads="75"
               enableLookups="false" redirectPort="8443" acceptCount="100"
               connectionTimeout="20000" disableUploadTimeout="true"  URIEncoding="UTF"/>
这样修改后,重启Tomcat就可以正确处理GET方法提交的表单数据了

Answer 4

我这里已经有了一个filter了public class EncodingFilter implements Filter 
{

private String targetEncodin = "UTF-8";
protected FilterConfig filterConfig; /**
 * 
 */
public EncodingFilter() 
{
super();
// TODO Auto-generated constructor stub
} /* (non-Javadoc)
 * @see javax.servlet.Filter#init(javax.servlet.FilterConfig)
 */
public void init(FilterConfig config) throws ServletException 
{
// TODO Auto-generated method stub
this.filterConfig = config;
if (config.getInitParameter("encoding") != null && !config.getInitParameter("encoding").equals("")) 
{
this.targetEncodin = config.getInitParameter("encoding");
}
} /* (non-Javadoc)
 * @see javax.servlet.Filter#doFilter(javax.servlet.ServletRequest, javax.servlet.ServletResponse, javax.servlet.FilterChain)
 */
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse,FilterChain chain) throws IOException, ServletException 
{
// TODO Auto-generated method stub
servletRequest.setCharacterEncoding(this.targetEncodin);
servletResponse.setContentType("text/html; charset=" + this.targetEncodin);
HttpServletResponse httpServletResponse = (HttpServletResponse)servletResponse;
httpServletResponse.setHeader("Pragma", "No-cache");
httpServletResponse.setHeader("Cache-Control", "no-cache");
httpServletResponse.setHeader("Expires", "0");
chain.doFilter(servletRequest, servletResponse);
} /* (non-Javadoc)
 * @see javax.servlet.Filter#destroy()
 */
public void destroy() 
{
// TODO Auto-generated method stub
this.filterConfig = null;
}}web.xml
<filter>
<filter-name>charEncoding</filter-name>
<filter-class>com.tiandinet.StrutsArticle.FunctionBeans.EncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter> <filter-mapping>
<filter-name>charEncoding</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

Answer 5

在JSP文件的最上方添加如下语句:
    <%@page contentType="text/html; charset=utf-8"%>
并在</head>之前添加如下语句:
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">