tomcat中文问题解决
一、表单POST的数据的中文乱码解决这类型的数据中文可以通过filters来实时过滤。filters代码如下：
package filters;
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.UnavailableException;
public class SetCharacterEncodingFilter implements Filter ...{
protected String encoding = null;
protected FilterConfig filterConfig = null;
protected boolean ignore = true;
public void destroy() ...{
this.encoding = null;
this.filterConfig = null;
}
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain)
throws IOException, ServletException ...{
// Conditionally select and set the character encoding to be used
if (ignore || (request.getCharacterEncoding() == null)) ...{
String encoding = selectEncoding(request);
if (encoding != null)
request.setCharacterEncoding(encoding);
}
// Pass control on to the next filter
chain.doFilter(request, response);
}
public void init(FilterConfig filterConfig) throws ServletException ...{
this.filterConfig = filterConfig;
this.encoding = filterConfig.getInitParameter("encoding");
String value = filterConfig.getInitParameter("ignore");
if (value == null)
this.ignore = true;
else if (value.equalsIgnoreCase("true"))
this.ignore = true;
else if (value.equalsIgnoreCase("yes"))
this.ignore = true;
else
this.ignore = false;
}
protected String selectEncoding(ServletRequest request) ...{
return (this.encoding);
}
}
filters配置（配置web.xml）：
＜filter＞
＜filter-name＞Set Character Encoding＜/filter-name＞
＜filter-class＞filters.SetCharacterEncodingFilter＜/filter-class＞
＜init-param＞
＜param-name＞encoding＜/param-name＞
＜param-value＞GBK＜/param-value＞
＜/init-param＞
＜/filter＞
＜filter-mapping＞
＜filter-name＞Set Character Encoding＜/filter-name＞
＜url-pattern＞/*＜/url-pattern＞
＜/filter-mapping＞
二、将中文数据存入数据库乱码问题
以mysql为例，改写连接字符串即可：
jdbc:mysql://localhost:3306/workshopdb? useUnicode=true&characterEncoding=GBK
三、 通过url传递参数和识别中文文件名问题
问题表现：１、通过url传递参数，例如：
http://localhost:81/crjy/admin/articlelist.jsp?levelId=64&levelName=学生党建
通过request.getParameter("levleName")得到的值为乱玛。
２、识别中文文件名，例如：
<img src="./pic/四川地图.jpg"> 图片不能显示。
解决之道：
１、如果只想解决第一个问题那很简单，两句代码即可：
String role=request.getParameter("chara");
role=new String(role.getBytes("ISO-8859-1"),"GB2312");
out.println(role);
因为tomcat服务器默认用 ISO-8859-1 字符集的。但是这样只能解决第一个问题不能解决中文文件名问题
２、两个问题一起解决，修改server.xml，找到下列语句添加URIEncoding="GB18030"，这样两个问题就一起解决了（不需要role=new String(role.getBytes("ISO-8859-1"),"GB2312");转化，得到的参数即为正常的中文）
<Connector acceptCount="100" connectionTimeout="20000" debug="0" disableUploadTimeout="true" enableLookups="false" maxSpareThreads="75" maxThreads="150" minSpareThreads="25" port="81" redirectPort="8443"/>
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