java filterÓ÷¨´óÈ«
¹Ø¼ü×Ö: filter
¹ýÂËÆ÷FilterÒ²¾ßÓÐÉúÃüÖÜÆÚ£ºinit()->doFilter()->destroy()£¬Óɲ¿ÊðÎļþÖеÄfilterÔªËØÇý¶¯¡£ÔÚservlet2.4ÖУ¬¹ýÂËÆ÷ͬÑù¿ÉÒÔÓÃÓÚÇëÇó·ÖÅÉÆ÷£¬µ«ÐëÔÚweb.xmlÖÐÉùÃ÷£¬<dispatcher>INCLUDE»òFORWARD»òREQUEST»òERROR</dispatcher>¸ÃÔªËØλÓÚfilter-mappingÖС£
Ò»¡¢ÅúÁ¿ÉèÖÃÇëÇó±àÂë
Java´úÂë
public class EncodingFilter implements Filter {
private String encoding = null;
public void destroy() {
encoding = null;
}
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
String encoding = getEncoding();
if (encoding == null){
encoding = "gb2312";
}
request.setCharacterEncoding(encoding);// ÔÚÇëÇóÀïÉèÖÃÉÏÖ¸¶¨µÄ±àÂë
chain.doFilter(request, response);
}
public void init(FilterConfig filterConfig) throws ServletException {
this.encoding = filterConfig.getInitParameter("encoding");
}
private String getEncoding() {
&nbs
Ïà¹ØÎĵµ£º
Javaѧϰ´ÓÈëÃŵ½¾«Í¨
Ò»¡¢ JDK (Java Development Kit)
JDKÊÇÕû¸öJavaµÄºËÐÄ£¬°üÀ¨ÁËJavaÔËÐл·¾³£¨Java Runtime Envirnment£©£¬Ò»¶ÑJava¹¤¾ßºÍJava»ù´¡µÄÀà¿â(rt.jar)¡£²»ÂÛʲôJavaÓ¦Ó÷þÎñÆ÷ʵÖʶ¼ÊÇÄÚÖÃÁËij¸ö°æ±¾µÄJDK¡£Òò´ËÕÆÎÕJDKÊÇѧºÃJavaµÄµÚÒ»²½¡£×îÖ÷Á÷µÄJ ......
package chape8;
import java.math.BigDecimal;
/**
* 8-48
* Èç¹ûÏëÒªÖªµÀ¾«È·µÄ´ð°¸£¬¾ÍÒª±ÜÃâʹÓÃdoubleºÍfloat
¶ÔÓÚ½ðÈÚÐÐÒµÀ´Ëµ£¬¶ÔÊý¾ÝµÄÑÏÕûÐÔÒªÇóÊǺܸߵģ¬²»ÈÝ°ëµãÂí»¢£¬
ÄÇ´ó¼Ò¶¼ÖªµÀÔÙÎÒÃǵÄJavaÓïÑÔÀïÃæÓÐÁ½¸ö¸¡µãÊýÀàÐ͵ıäÁ¿floatºÍdouble£¬
¿ÉÄÜ´ó¼Ò»áÈÏΪËûÃǵľ«¶È¶ÔÓÚ½ðÈÚÐÐÒµÕâÑù¶ÔÊý×Öà ......
java exception ½â¾ö·½°¸ - ÎÒµÄÒì³£Íø|Òì³£|exception 791 - java.lang.NoSuchMethodError 792 - RuntimeException 793 - org.hibernate.exception.SQLGrammarException 794 - Internal Error 795 - ×Ô¶¨ÒåÒì³£ 796 - org.dom4j.DocumentException 797 - java.net.SocketException 798 - Exception¶ÔÏó 799 - SQLE ......
ʹÓõ÷ÊÔģʽ¼´¿É¡£
½øTOMCATµÄmanager¿ØÖÆ̨£¬¿ÉÒÔ¶ÔÖ¸¶¨µÄÐéÄâĿ¼½øÐпØÖÆ£¨¼ÓÔØ£¬ÖØÔØ£¬Ð¶ÔØ£©£¬±ÈÖØÆô¿ìµÄ¶à£¬ÔÚTOMCATµÄĬÈÏÊ×Ò³ÉÏÓÐÁ´½Ó¡£
============================================================================================
ÎÒÃÇÔÚ¿ª·¢µÄ¹ý³Ì¾³£ÐèÒªµ÷ÊÔ£¬Ò²³£³£ÐèÒªÐÞ¸ÄʹÓõÄÀàºÍservlet£¬Èç¹û ......