Reading JSON file error

Question

I try to read JSON file with Java. The code is:

public static void main(String[] args) throws Exception {
    InputStream is = new FileInputStream("j.txt");
    String jsonTxt = IOUtils.toString( is );

    JSONObject json = (JSONObject) JSONSerializer.toJSON( jsonTxt );

    JSONObject routes = json.getJSONObject("routes");
    JSONObject legs = routes.getJSONObject("legs");
    JSONObject distance = legs.getJSONObject("distance");
    String dist = distance.getString("text");
}

And the line JSONObject json = (JSONObject) JSONSerializer.toJSON( jsonTxt ); makes an error:

 Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/lang/exception/NestableRuntimeException
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClassCond(ClassLoader.java:632)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:616)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
    at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
    at antmedic.algorithm.SimpleParser.main(SimpleParser.java:24)
 Caused by: java.lang.ClassNotFoundException: org.apache.commons.lang.exception.NestableRuntimeException
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
    ... 13 more
Java Result: 1

I would be grateful for solving this problem.

Xiao Jia · Accepted Answer · 2012-07-16 12:31:03Z

12

Latest version of Commons Lang (currently 3.1) has package name of org.apache.commons.lang3 instead of org.apache.commons.lang. For the later package name (as in your case), you should download 2.6 version of Commons Lang.

answered Jul 16, 2012 at 12:31

Xiao Jia

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2 Comments

Anuj Mehta Over a year ago

Thanks. I was using latest version i.e. 3.1 and was getting this error

Jacob Over a year ago

+1 Great, I was trying with 3.1 and getting same error. Thanks for this great answer.

Amir Raminfar · Accepted Answer · 2011-01-16 16:39:30Z

5

Sounds like you don't have apache commons jar file in you class path

answered Jan 16, 2011 at 16:39

Amir Raminfar

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5 Comments

Amir Raminfar Over a year ago

That's a vague question because I am not sure how you have set up your project. But assuming its just a simple java project, look for the missing jar file online and then add it to your class path in netbeans. I don't use netbeans so maybe someone else can help you.

Devel Over a year ago

I think I have already did it - I have added the file commons-io-2.0.1.jar as a library to my project. Do I have to add something more?

Amir Raminfar Over a year ago

You need commons lang. Guessing here commons.apache.org/lang/download_lang.cgi

Ashish Agarwal Over a year ago

@Amir: can you please tell as why one need to include these JARs for project. whats the logic behind that? your reply will help solicited.

Amir Raminfar Over a year ago

@Sam, if you are using a lib that doesn't depend on anything then you would never need to depend on any other jar files. In this case, you are using a JSON lib that depends on apache common's lib. When packaging these libs, the apache common lib jar files need to be present. But they are not required again until runtime. So when you go to use your JSON lib, it throws these errors because it can't find them. Adding the required jar tells JAVA where these jar files are. Some times it takes hundreds of files to get everything working. I recommend using a dependency manager like maven.

CodegistCRest · Accepted Answer · 2011-01-16 16:41:10Z

1

You are missing some jar dependency which contains org.apache.commons.lang.exception.NestableRuntimeExceptio class. Look on internet where to find this class and add this jar in your classpath (in this case Apache Common Lang)

answered Jan 16, 2011 at 16:41

CodegistCRest

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Comments

user1003932 · Accepted Answer · 2012-10-07 07:50:21Z

0

You can update your maven pom.xml file with this. I had to specify 2.3 for the version to get it to download.

    <dependency>
      <groupId>commons-lang</groupId>
      <artifactId>commons-lang</artifactId>
      <version>2.3</version>
    </dependency>

answered Oct 7, 2012 at 7:50

user1003932

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