jsp知识点总苑.doc

1判断复选框是否已经选择 %if(stu.getHobby().indexOf(篮球)=0){% input type=checkbox name=hobby value=篮球 checked /篮球 %}else{ % input type=checkbox name=hobby value=篮球/篮球 %} % %if(stu.getHobby().indexOf(足球)=0){% input type=checkbox name=hobby value=足球 checked /足球 %}else{ % input type=checkbox name=hobby value=足球/足球 %} % %if(stu.getHobby().indexOf(乒乓)=0){% input type=checkbox name=hobby value= 乒乓 checked / 乒乓 %}else{ % input type=checkbox name=hobby value= 乒乓/ 乒乓 %} % 2单选框%if(stu.getSex().equals(男)){ % 性别： input type=radio name=sex value=男 checked /男 input type=radio name=sex value=女/女 br %} else{% 性别： input type=radio name=sex value=男 /男 input type=radio name=sex value=女 checked/女 br %} % 3获取复选框的值String[] hh = saveForm.getHobby(); String s = ; for(int i=0;ihh.length;i++){ s+=hh[i]; } stu.setHobby(s); 4过滤器xml里的内容 filter filter-namefilter/filter-name filter-classcom.xt.filter.EncodeFilter/filter-class /filter filter-mapping filter-namefilter/filter-name url-pattern/*/url-pattern /filter-mapping 过滤文件 package com.xt.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 EncodeFilter implements Filter{ public void destroy() { // TODO Auto-generated method stub } public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { // TODO Auto-generated method stub request.setCharacterEncoding(utf-8); chain.doFilter(request, response); } public void init(FilterConfig arg0) throws ServletException { // TODO Auto-generated method stub } } 5工厂连接类 1.（SqlServer数据库1433）public static Connection getConnection(){ Connection conn = null;