Attribute
Última actualización el
28 dic. 2022
Description
Provides support for writing Java code within ColdFusion.
Syntax
<cfjava
instance="instance"
</cfjava>
History
Adobe ColdFusion (2021 release): New in this release.
Attributes
|
|
Req/Opt |
Description |
|---|---|---|
|
Instance |
Required |
The variable that holds the value of class instance of the Java code. |
Usage
You can create Java classes with a block of CFML code and execute the code. You can instantiate Java objects and write core Java constructs within a CFML block.
Example- Tag
<cfjava handle="classInstance" >
import java.io.*;
public class Harmless{
private String ss = "John";
public Harmless(String s){
this.ss = s;
}
public void write(String path) throws Exception{
File file = new File(path);
file.createNewFile();
FileWriter fr = new FileWriter(file, true);
BufferedWriter br = new BufferedWriter(fr);
PrintWriter pr = new PrintWriter(br);
pr.println("new content from java added " + this.ss);
pr.close();
br.close();
fr.close();
}
public String read (String path) throws Exception{
File file = new File(path);
BufferedReader objReader = null;
String strCurrentLine;
String cont = "";
objReader = new BufferedReader(new FileReader(path));
while ((strCurrentLine = objReader.readLine()) != null) {
cont= cont + "--" + strCurrentLine;
}
objReader.close();
return cont;
}
}
</cfjava>
<cfset classInstance.init("content from cf")> <!--- calling constructor using init()--->
<cfset path = ExpandPath('./') & 'temp.txt'>
<cfset classInstance.write(path)> <!--- Calling the method write() of Class Harmless --->
<cfoutput>#classInstance.read(path)#</cfoutput> <!--- Calling the method read() of Class Harmless --->
Example- Script
<cfscript>
classInstance = java{
public class class1{
public int execute ()
{
int[] arr;
arr = new int[5];
arr[0] = 10;
arr[1] = 20;
arr[2] = 30;
arr[3] = 40;
arr[4] = 50;
return arr.length;
}
}
}
writeoutput(classInstance.execute())
</cfscript>
Output
5
