JSTL引入及报错

jstl引入

tomcat8.5用jstl1.2 tomcat8.5以上用jstl2.0

JSTL下载地址

下载的jar放在lib

tld放在tlds文件夹

web.xml

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
  <display-name>Archetype Created Web Application</display-name>
    <taglib>
      <taglib-uri>http://java.sun.com/jsp/jstl/fmt</taglib-uri>
      <taglib-location>/WEB-INF/tlds/fmt.tld</taglib-location>
    </taglib>

    <taglib>
      <taglib-uri>http://java.sun.com/jsp/jstl/core</taglib-uri>
      <taglib-location>/WEB-INF/tlds/c.tld</taglib-location>
    </taglib>

    <taglib>
      <taglib-uri>http://java.sun.com/jsp/jstl/sql</taglib-uri>
      <taglib-location>/WEB-INF/tlds/sql.tld</taglib-location>
    </taglib>

    <taglib>
      <taglib-uri>http://java.sun.com/jsp/jstl/x</taglib-uri>
      <taglib-location>/WEB-INF/tlds/x.tld</taglib-location>
    </taglib>

</web-app>

jstl找不到数据源报错500

jakarta.servlet.ServletException: jakarta.servlet.jsp.JspException: Unable to get connection, DataSource invalid: "java.sql.SQLException: No suitable driver found for ${db}"

这个是servlet的报错

jsp代码使用

<%@ page isELIgnored="false" %>

即可解决