JSP built-in object out object function introduction

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Introduction to the function of the JSP built-in object out object

The following describes a brief description of the functions of the JSP built-in object out, as follows:

The function of the

 out object:output character stream to JSP page,It can convert dynamic content into html form and display it to the userNotes: 1. The out object is an instantiated object of the javax.servlet.jsp.JspWriter class. We can use the pageContext.getOut() method to get the out object 2.Using the <%=%> method to output is more convenient than out.println(), so we should try to use the <%=%> method to reduce the use of out objects

The method of JSP built-in object out

public abstract void clear()	Clear buffer contents, do not send data to client
public abstract void clearBuffer()	Clear the buffer after sending the data to the client
public abstarct void close()	Closes the output stream.
public abstract void flush()	The data in the output buffer.
public int getBufferSize()	Get the size of the buffer.The size of the buffer can be set with <%@ page buffer=size %>
public abstract int getRemainning()	Get the size of the remaining buffer space
public boolean isAutoFlush()	Get the AutoFlush value set with <%@ page is AutoFlush="true/false"%>
public abstract void newLine()	Output a newline character, newline
public abstract void print()	Display content of various data types
public abstract void println()	Separate lines to display content of various data types

Example

<%@ page language="Java" import="java.util.*" pageEncoding="GB2312"%><%int all=out.getBufferSize();//Get the buffer sizeint remain=out.getRemaining();//Get the remaining buffer sizeint use=all-remain;//The size of the buffer usedout.println("Output information---use buffer size"+use);%>