记一次未解决的异常：java.lang.NoClassDefFoundError: net/sf/json/JSONObject

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<dependency>

            <groupId>org.apache.commons</groupId>

            <artifactId>commons-lang3</artifactId>

            <version>3.4</version>

        </dependency>

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<dependency>

     <groupId>com.alibaba</groupId>

     <artifactId>fastjson</artifactId>

     <version>1.2.7</version>

</dependency>

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import java.util.ArrayList;

import java.util.List;

import com.alibaba.fastjson.JSON;

/**

 * Json工具类

 *

 */

public class JsonUtil {

    /**

     * 字符串转换为实体类

     *

     */

    public static <T> T StringToEntity(String str, Class<T> classT) {

        T t = JSON.parseObject(str, classT);

        return t;

    }

    /**

     * 字符串转换为实体集合

     *

     */

    public static <T> ArrayList<T> StringToEntityList(String str, Class<T> classT) {

        List<T> lst = JSON.parseArray(str, classT);

        return (ArrayList<T>) lst;

    }

    /**

     * 实体类转换为字符串

     *

     */

    public static <T> String EntityToString(T data) {

        String str = JSON.toJSONString(data);

        return str;

    }

}