jsp的9个内置对象和4个作用域都有哪些

2025-04-06 02:43:23
推荐回答(3个)
回答1:

jsp九个内置对象及4个作用域
request 请求对象  类型 javax.servlet.ServletRequest 作用域 Request

response 响应对象 类型 javax.servlet.SrvletResponse 作用域 Page

pageContext 页面上下文对象 类型 javax.servlet.jsp.PageContext 作用域 Page

session 会话对象 类型 javax.servlet.http.HttpSession 作用域 Session

application 应用程序对象 类型 javax.servlet.ServletContext 作用域 Application

out 输出对象 类型 javax.servlet.jsp.JspWriter 作用域 Page

config 配置对象 类型 javax.servlet.ServletConfig 作用域 Page

page 页面对象 类型 javax.lang.Object 作用域 Page

exception 例外对象 类型 javax.lang.Throwable 作用域 page

回答2:

1、request 用户端请求,此请求会包含来自get/post请求的参数,表示HttpServletRequest对象 作用域 Request
2、response 网页传回用户端的回应,表示HttpSrvletResponse
作用域 Page
3、pageContext 网页的属性是在这里管理,表示一个javax.servlet.jsp.PageContext 对象
作用域 Page
4、session 与请求有关的会话期,可以存贮用户的状态信息,表示一个请求的javax.servlet.http.HttpSession 作用域 Session
5、application servlet正在执行的内容,表示一个javax.servlet.ServletContext 对象
作用域 Application
6、out 用来向浏览器回送输出结果 ,是javax.servlet.jsp.JspWriter 的一个实例
作用域 Page
7、config 用于存取servlet实例的初始化参数,表示一个javax.servlet.ServletConfig 对象
作用域 Page
8、page jsp页面本身,从该页面产生的servlet实例 作用域 Page
9、exception 例外对象,针对错误页面未捕捉的例外 javax.lang.Throwable
作用域 page

回答3:

就是下面这些了

jsp九个内置对象及4个作用域
request 请求对象  类型 javax.servlet.ServletRequest 作用域 Request

response 响应对象 类型 javax.servlet.SrvletResponse 作用域 Page

pageContext 页面上下文对象 类型 javax.servlet.jsp.PageContext 作用域 Page

session 会话对象 类型 javax.servlet.http.HttpSession 作用域 Session

application 应用程序对象 类型 javax.servlet.ServletContext 作用域 Application

out 输出对象 类型 javax.servlet.jsp.JspWriter 作用域 Page

config 配置对象 类型 javax.servlet.ServletConfig 作用域 Page

page 页面对象 类型 javax.lang.Object 作用域 Page

exception 例外对象 类型 javax.lang.Throwable 作用域 page

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