用jackson封装的JSON工具类

package hjp.smart4j.framework.util;

import com.fasterxml.jackson.databind.ObjectMapper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
* JSON 工具类
*/
public final class JsonUtil {
private static final Logger LOGGER = LoggerFactory.getLogger(JsonUtil.class);

private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper();

/**
* 将POJO转为JSON
*/
public static <T> String toJson(T obj) {
String json;
try {
json = OBJECT_MAPPER.writeValueAsString(obj);
} catch (Exception e) {
LOGGER.error("convert POJO to JSON failure", e);
throw new RuntimeException(e);
}
return json;
}

/**
* 将JSON转为POJO
*/
public static <T> T fromJson(String json, Class<T> type) {
T pojo;
try {
pojo = OBJECT_MAPPER.readValue(json, type);
} catch (Exception e) {
LOGGER.error("convert JSON to POJO failure", e);
throw new RuntimeException(e);
}
return pojo;
}
}