to Json String - Java JSON

Java examples for JSON:JSON String

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Description

to Json String

Demo Code

/**/* w  ww. ja  va2  s.  c  o m*/
 * Copyright (C) 2012-2013  Du?an Vejnovi??  <vaadin@dussan.org>
 *
 * 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.
 */
import java.util.Map;
import java.util.Map.Entry;

public class Main{
    public static String toJsonString(Object object) {
        try {
            Map<String, Object> values = ClassHelper.getFieldValues(object);
            StringBuilder builder = new StringBuilder();
            for (Entry<String, Object> entry : values.entrySet()) {
                String fieldName = entry.getKey();
                Object fieldValue = entry.getValue();

                if (ObjectHelper.isArray(fieldValue)) {
                    if (fieldValue instanceof Object[][]) {
                        fieldValue = ObjectHelper
                                .toArrayString((Object[][]) fieldValue);
                    } else {
                        fieldValue = ObjectHelper
                                .toArrayString((Object[]) fieldValue);
                    }
                }

                if (fieldValue != null) {
                    fieldValue = !ObjectHelper.isString(fieldValue) ? fieldValue
                            : fieldValue.toString().replaceAll("\"", "'");
                    builder.append(builder.length() > 0 ? ", " : "");
                    builder.append(fieldName + ": ");
                    builder.append(ObjectHelper.isString(fieldValue) ? "\""
                            : "");
                    builder.append(fieldValue);
                    builder.append(ObjectHelper.isString(fieldValue) ? "\""
                            : "");
                }
            }
            return builder.insert(0, "{").append("}").toString();
        } catch (Exception e) {
            return null;
        }
    }
}

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