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A Java library for the Twitter API
There is a newer version: 4.0.7
/*
 * Copyright 2007 Yusuke Yamamoto
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package twitter4j.examples.json;

import twitter4j.Status;
import twitter4j.Twitter;
import twitter4j.TwitterException;
import twitter4j.TwitterFactory;
import twitter4j.json.DataObjectFactory;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.util.List;

/**
 * Example application that gets public timeline and store raw JSON strings into statuses/ directory..

 *
 * @author Yusuke Yamamoto - yusuke at mac.com
 */
public final class SaveRawJSON {
    /**
     * Usage: java twitter4j.examples.json.SaveRawJSON
     *
     * @param args String[]
     */
    public static void main(String[] args) {
        Twitter twitter = new TwitterFactory().getInstance();
        System.out.println("Saving public timeline.");
        try {
            new File("statuses").mkdir();
            List statuses = twitter.getPublicTimeline();
            for (Status status : statuses) {
                String rawJSON = DataObjectFactory.getRawJSON(status);
                String fileName = "statuses/" + status.getId() + ".json";
                storeJSON(rawJSON, fileName);
                System.out.println(fileName + " - " + status.getText());
            }
            System.out.print("\ndone.");
            System.exit(0);
        } catch (IOException ioe) {
            ioe.printStackTrace();
            System.out.println("Failed to store tweets: " + ioe.getMessage());
        } catch (TwitterException te) {
            te.printStackTrace();
            System.out.println("Failed to get timeline: " + te.getMessage());
            System.exit(-1);
        }
    }

    private static void storeJSON(String rawJSON, String fileName) throws IOException {
        FileOutputStream fos = null;
        OutputStreamWriter osw = null;
        BufferedWriter bw = null;
        try {
            fos = new FileOutputStream(fileName);
            osw = new OutputStreamWriter(fos, "UTF-8");
            bw = new BufferedWriter(osw);
            bw.write(rawJSON);
            bw.flush();
        } finally {
            if (null != bw) {
                try {
                    bw.close();
                } catch (IOException ignore) {
                }
            }
            if (null != osw) {
                try {
                    osw.close();
                } catch (IOException ignore) {
                }
            }
            if (null != fos) {
                try {
                    fos.close();
                } catch (IOException ignore) {
                }
            }
        }
    }
}