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Javaee jsp convert int to string

Solution 2: You may compile JSP Pages with any JSP Rendering engine, for example Apache Jasper, included in Apache Tomcat. I want to use EL in my java code, not jsp pages, to translate some simple expression to value constants, like this: however, in this example, I used JUEL library, so I need to access JUEL implementation classes.

Javaee jsp convert int to string

javaee jsp convert int to string

String str = String.valueOf(ivar);

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How would I convert an integer to a string? [duplicate]

I’m currently typing up a program and was curious as to how I would be able to change an integer input into a letter but it would be the specific amount of times the integer would be.

As an example lets say I asked the user for how many apples they have and they typed in three, how would I then turn that «3» into «aaa», or like if they entered 11 and the output came as «aaaaaaaaaaa». I hope this isn’t too bad of an example.

If you want to program, you’ll have to do those yourself;

int count = your_number, i = 0; String letter = your_letter; String result = ""; while (i < count) < result += letter; i++; >System.out.println(result); 

Or you can use Java Strings.Utils.repeat() function Strings.Utils

String stringToRepeat = "xxx" int count = your_count; String repeated = StringUtils.repeat(stringToRepeat, count); System.out.println(repeated); 

Rendering JSP to a string [duplicate]

What is the way to render jsp file to a string? Is it possible without using frameworks like spring/struts/etc.

If you want to stream any webpage may it be a JSP or any other web page, you can use the method below.

import java.io.*; import java.net.*; public class c < public String getHTML(String urlToRead) < URL url; HttpURLConnection conn; BufferedReader rd; String line; String result = ""; try < url = new URL(urlToRead); conn = (HttpURLConnection) url.openConnection(); conn.setRequestMethod("GET"); rd = new BufferedReader(new InputStreamReader(conn.getInputStream())); while ((line = rd.readLine()) != null) < result += line; >rd.close(); > catch (Exception e) < e.printStackTrace(); >return result; > public static void main(String args[]) < c c = new c(); System.out.println(c.getHTML(args[0])); >>

You may compile JSP Pages with any JSP Rendering engine, for example Apache Jasper , included in Apache Tomcat.

Use MockRunner. This allows you to run JSPs in test cases, for example.

Java — rendering JSP to a string, What is the way to render jsp file to a string? Is it possible without using frameworks like spring/struts/etc. Stack Overflow. About; Products For Teams; Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; …

Java, how to using expression language in pure java

I have a JavaEE web application, as it will be deployed to some kind of application servers such as weblogic websphere tomcat etc. so the EL api will be avaiable for me, but I don’t need to care about what EL implementation is used.

I want to use EL in my java code , not jsp pages, to translate some simple expression to value constants, like this:

public static void main(String[] args) < // TODO Auto-generated method stub ExpressionFactory ef = new ExpressionFactoryImpl(); SimpleContext ec = new SimpleContext(); ec.setVariable("value", ef.createValueExpression("0", String.class)); ValueExpression ve = ef.createValueExpression(ec, "$", String.class); System.out.println(ve.getValue(ec)); > 

however, in this example, I used JUEL library, so I need to access JUEL implementation classes. my question is how Can I do the same thing but just use classes in javax.el package ?

Do I need to implement my own ELContext and VariableMapper and other abstract classes ?

I believe you don’t need to hack EL together with your code, I think in some cases that might be problemmatic.

There are quite a lot of libraries offering similar functionalities (known as Template Engines ), try Velocity or FreeMarker for example. They are extremely easy to use and have quite a lot of options.

MVEL solve my problem, it’s flexible and powerful!

Mysql — Java UTF-8 encoding from jsp form, Last thing is how you write strings to the response stream, if you convert strings to bytes make sure it’s using utf-8 and let client know it. response.setContentType («text/html; charset=UTF-8»); response.getOutputStream ().write ( myData.getBytes («UTF-8») ); This was a long post but it pretty much …

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Java jsp convert int to string code example

You can use for-loops and if-clauses and what not, as everything between is normal java. Solution 2: You may compile JSP Pages with any JSP Rendering engine, for example Apache Jasper, included in Apache Tomcat.

Rendering JSP to a string [duplicate]

If you want to stream any webpage may it be a JSP or any other web page, you can use the method below.

import java.io.*; import java.net.*; public class c < public String getHTML(String urlToRead) < URL url; HttpURLConnection conn; BufferedReader rd; String line; String result = ""; try < url = new URL(urlToRead); conn = (HttpURLConnection) url.openConnection(); conn.setRequestMethod("GET"); rd = new BufferedReader(new InputStreamReader(conn.getInputStream())); while ((line = rd.readLine()) != null) < result += line; >rd.close(); > catch (Exception e) < e.printStackTrace(); >return result; > public static void main(String args[]) < c c = new c(); System.out.println(c.getHTML(args[0])); >>

You may compile JSP Pages with any JSP Rendering engine, for example Apache Jasper, included in Apache Tomcat.

Use MockRunner. This allows you to run JSPs in test cases, for example.

How can compile I `.java file` in jsp?, Using java compiler API I want to compile a java file in jsp.I created a html file and using its textArea element I sent its text, which is expected to be code in java entered by user, to JSP on server and after collecting it in a string I made a file with .java extension and wrote it with textArea contents then i used compiler API but it …

Passing int as parameter from JSP to servlet

you need to parse the parameter as an int. In a request the parameters are just strings at the end of the day (they were typed into a browser, or stored in the html of a webpage after all), so you need to interpret it on the server as the type you expect.

studentId = Integer.parseInt(request.getParameter("StudentId")); 

private int roll; int roll = Integer.parseInt(request.getParameter("roll")); 

Here request is the object of HttpServletRequest and hence it will the getParameter() and we are getting the value as string .

int amobile; amobile = Integer.parseInt(request.getParameter("amobile")); //raising an exception 

Java to JSP — How do I integrate a Java application into, Otherwise you can look in the folders of you eclipse workspace, and in the folder of the project you will find the .class generated from eclipse. 3)Put this file in a folder called WEB_INF\classes\example that stays in the root of your tomcat documents folder. (example is the name of the package) 4)In your jsp file …

How to convert an arbitrary object to String with EL + JSTL? (calling toString())

And it’ll toString it for you.

edit : Your nested expression can be resolved like this:

The first line stringifies (using toString() ) the $ expression and stores it in the myValue variable. The second line uses myValue to index the map.

Another thing you can do is create your own EL function, call it toString, and then call that in JSTL. EL functions are basically static methods hooked up with a taglib file. Straightforward to do.

Really? Did you actually, you know, try it?

        
Hello World!
 $ testDate = $ 
myVar = $ 
testDate myVar  

And JSP 2.0 tagfile and JSTL functions are trivial.

I think in new versions of JSP api you can call methods, even with parameters!

Java — How to convert String to double in JSP, Convert your strings in the controller, before passing to jsp. How can I avoid Java code in JSP files, using JSP 2? 1859. How do I split a string in Java? 3382. How do I convert a String to an int in Java? 3604. How can I create a memory leak in Java? 3727. Why is char[]

Java to JSP. How to?

I suggest not to use the JSP technology anymore unless you have to (-> customer demands it).

Instead, get GWT or Grails. Both come with tools to setup a project in Eclipse from scratch that compiles and can be run with the press of a button. Also, both technologies are much more advanced than JSP and you’ll find them much more simple to understand as a .Net developer.

If all you want do do is to display the output in a html page, the simplest ways is still to use jsp.

You can do as mentioned in kgiannakakis answer

If your class already returns a string with a nice output, everything you need do this.

No fancy html formatting, though. Just a text dump.

You can use for-loops and if-clauses and what not, as everything between is normal java.

If you need more functionality, You should probably not bother with jsp at all. (And absolutely not at all with JSTL, which would be a total waste of time if you are not intending to start a career writing web apps for big enterprises.

Perhaps GWT 🙂 Its almost java.

I recommend reading a JSP tutorial. It isn’t that hard. To get you started quickly, these are the required steps:

• Create a web application. It is better to use a IDE like Eclipse or Netbeans to do so. A quick and dirty solution is to create the jsp under webapps/ROOT in Tomcat
• The jsp is like an html file with some special tags that allow it to run java code.

This is how you include classes or packages:

You put your Java code inside a . You can practically put all your java code there.

The mymessage will be directly printed in the html source.

For a beginner, I would recommend to start from a tutorial for Eclipse or Netbeans.

Java — rendering JSP to a string, This allows you to run JSPs in test cases, for example. Share. Follow answered Sep 23, 2009 at 7:53. Aaron How can I avoid Java code in JSP files, using JSP 2? 3383. How do I convert a String to an int in Java? 3727. Why is char[] preferred over String for passwords? Hot Network Questions

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Code example for converting integer to string in Java JSP

JSP custom tags that are written as a JSP template itself are called tag files and seem to be what you are looking for. A basic example of this is having a specific solution for this purpose. One possible solution is to use Tag files, which have been available since JSP 2.0.

Java to JSP — How do I integrate a Java application into a JSP web page?

In order to illustrate, it is necessary to create a class containing various methods that produce specific outcomes.

package example; public class WordLength < private String word=""; public int length=0; public WordLength()<>public void setWord(String w) < word = w; length = word.length(); >public String getWord() < return word; >public int getLength() < return length; >> 

To obtain the .class , you must compile the java file using javac . Alternatively, you can find the .class in the project folder within your Eclipse workspace.

Store the specified file in a directory named \ \ \ \ \ WEB_INF\classes\example\ \ \ \ located in the root of your Tomcat documents folder. Please note that the package name is only an example.

In your JSP file, incorporate the Java class and utilize it.

     
The word has characters.
 

This instance is triggered through an automated form that requests the user to enter a word.

To generate a pleasant phrase, you must provide a string as the output. Avoid utilizing System.out.println since it produces the output to the console, which is unsuitable for our purposes of displaying the string on a webpage.

Employ a StringBuilder for gathering your expressions and presenting them as a string array with the use of String[] .

Based on the preceding paragraph, it is imperative to eliminate the main approach. In my opinion, static would be an appropriate alternative method, which involves PhraseOMatic.generatePhrases() .

Afterward, refer to this tutorial to generate a JSP webpage.

Java — Convert String to Code, Yes it is possible in many ways. As some have mentioned above, Java 6 allows you to parse, manipulate and rewrite code as it is loaded! The solution can vary: You could for example, write your DB expression as a Java class and insert your serialized class into the DB as a glob or blob or whatever its called.

Fetching Java variable from JSP into Script tag

Prior to usage, the initial step involves declaring a Java variable, such as the sample string «myJavaVariable».

Next, in the script, assign the Java variable to the JavaScript variable as follows: var myJSVar = «»;

Retrieving a Java variable within a script is not feasible. Nevertheless, you can assign the values to an HTML element through Java and subsequently use the tag to obtain access to these values stored within the HTML element.

Obtaining the information from an HTML element by utilizing the script tag.

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