Java
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JSP Out. Clear() method: clear the data in the buffer
clear() Example <% out.println("C语言中文网"); out.clear(); %> -
JSP Request. Getcontentlength() method: get the length of the requested body
getContentLength() Example <% int len = request.getContentLength(); out.println("请求内容的长度为:"+len); …… -
Java Map. Containskey() method: judge whether the map collection object contains the specified key name
containsKey(Object key) Typical application public static void main(String[] args){ Map map = new HashMap(); //…… -
JSP Request. Removeattribute() method: deletes an attribute in the request
removeAttribute(String name) Example <% request.removeAttribute("name"); request.removeAttribute("sex"); …… -
JSP application. Getmajorversion() method: returns the maximum version number of servlet API supported by the server
getMajorVersion() Example <% int i=application.getMajorVersion(); out.print(i); %> -
JSP config. Getservletname() method: get the name of the servlet
getServletName() Example <% String name = config.getServletName(); out.println("Servlet name is:"+name); %…… -
Jsp: fallback: prompt tag
…… < Jsp: fallback > error message < / JSP: fallback >... < / JSP: plugin > is set here Exam…… -
Java List. Remove() method: removes the specified element from the list
Grammar 1 remove(int index) Example public static void main(String[] args){ List<String>list = new ArrayL…… -
JSP Request. Getattributenames() method: returns the name collection of all attributes
getAttributeNames() Example <% request.setAttribute("name","zs"); //设置name属性 request.setAttribute("age…… -
JSP Response. Getcharacterencoding () method: get the character encoding type of the response
getCharacterEncoding() Example <% String encode = response.getCharacterEncoding(); out.println("响应客户端…… -
JSP Response. Addheader() method: add HTTP header information
addHeader(String name,String value) Example <%=new Date()%> <% response.addheader("Refresh","1"); …… -
Java Map. Put() method: get all the key names of the map collection
put(K key,V value) Example public static void main(String[] args)throws InterruptedException{ Map map = new Has…… -
Java List. Clear() method: removes all elements from the list
clear() Example public static void main(String[] args){ List<String>list = new ArrayList<String>();…… -
JSP PageContext. Release() method: release related resources
release() Example <% pageContext.release(); %> -
Detailed explanation of Java one-dimensional array: Java creates one-dimensional array, initializes one-dimensional array, and obtains single / all elements
Create a one-dimensional array 数据类型数组名[]; //声明数组 数据类型[]数组名; //声明数组 int[] score; /…… -
JSP application. Getresourcepaths() method: returns all files in the specified directory
getResourcePaths(String path) Example <% Set set = application.getResourcePaths("/"); //返回装载指定路径列表…… -
JSP Request. Getheadersnames() method: returns the names of all request headers
getHeaderNames() Example <% Enumeration cts = request.getHeaderNames(); while(cts.hasMoreElements()){ …… -
JSP Request. Getintheader () method: get the corresponding header information in the client request
getIntHeader(String name) Example <% out.println(request.getIntHeader("Expires")); %> -
Java List. Get () method: get the element at the specified position in the list
get(int index) Typical application public static void main(String[] args){ List<String>list = new ArrayLi…… -
JSP application. Getattributenames() method: get all attribute names
getAttributeNames() Example <% Enumeration names = application.getAttributeNames(); while(names.hasMoreElem…… -
Feel the characteristics of Java data object JDO 2.0 query language (1)
The improvement of query language is jdo2 0 specification. This paper expounds jdo2 from a higher level Some new featu…… -
JSP from shallow to deep (8) — JSP Tags
Another important syntax of JSP is tags. JSP tags does not use <%, but only the < character. JSP tag is a bit li…… -
Note: Lecture 4 exception handling and I / O flow in Java
[thinking before class] 1. What are exceptions? What are the two exception handling mechanisms in Java? 2. What are th…… -
Note: Lecture 3 object oriented features in the Java language
[thinking before class] 1. What are objects? What are classes? What are packages? What are interfaces? What are intern…… -
Note: Lecture 6 Java threads and Java applets
[thinking before class] 1. What is a thread? What is the difference between it and a process? What is the applicable d…… -
JSP from simple to deep (3) — adding dynamic content through expressions
In our previous chapters, any HTML file can be transformed into a JSP file by changing its extension to jsp。 Of cours…… -
Here comes tiger j2se1 5 list of new features
Although the Java version has evolved from 1.0 to 1.4 2. However, the Java language itself has not changed much, only …… -
JSP from simple to deep (10) — beans and forms processing
Forms is a very common way to interact on websites. JSP makes form processing easier. The standard way to process form…… -
Note: Lesson 5 AWT graphical user interface design
[thinking before class] 1. Java language is a cross platform programming language, so how can the graphical user inter…… -
JSP from simple to deep (4) — scriptlets
In the above tutorial, we have learned how to embed Java expressions between <% = and% > character series in JSP…… -
Experience of integrating iis5 and tomcat5 with JK2 in Win32 environment
This article assumes that iis5 and tomcat5 have been installed JK2 download address: http://apache.linuxforum.net/dist…… -
Notes: Lecture 2 basic knowledge of Java language
summary: 4. Floating point (real) data real constant: ◇ decimal number form consists of numbers and decimal points, an……