Json工具类

public class JsonUtils {
    private static SerializeConfig mapping = createConfig();

    public JsonUtils() {
    }

    private static SerializeConfig createConfig() {
        SerializeConfig config = new SerializeConfig();
        config.put(Date.class, new SimpleDateFormatSerializer("yyyy-MM-dd HH:mm:ss"));
        config.put(Timestamp.class, new SimpleDateFormatSerializer("yyyy-MM-dd HH:mm:ss"));
        config.put(java.sql.Date.class, new SimpleDateFormatSerializer("yyyy-MM-dd HH:mm:ss"));
        config.put(Double.class, new DoubleSerializer("#.########"));
        config.put(BigDecimal.class, new BigDecimalCodec());
        return config;
    }

    public static String toJson(Object paramMap) {
        if (null == mapping) {
            mapping = createConfig();
        }

        return JSON.toJSONString(paramMap, mapping, new SerializerFeature[]{SerializerFeature.WriteBigDecimalAsPlain, SerializerFeature.WriteMapNullValue});
    }
}