jsp helloworld 部署Tomcat

<%
    String str = "hello world";
    out.print(str);
%>

部署到Tomcat

Servers视图, 右键Tomcat, Add and Remove

启动Tomcat

Servers视图, 右键Tomcat, Start

访问站点:

localhsot:8080/project_name/index.jsp

JSP声明代码:

<%!
    String str = "hello world";
%>
<%
//    String str = "hello world";
    out.print(str);
%>



JSP表达式:

JSP表达式输出:
```jsp
<%="hello jsp!" %><br />