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/*******************************************************************************
* Copyright 2017 ZTE, Inc. and others.
*
* 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.
******************************************************************************/
/**
* Copyright (C) 2015 ZTE, Inc. and others. All rights reserved. (ZTE)
*
* 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 org.onap.msb.sdk.discovery.util;
import org.onap.msb.sdk.discovery.common.RouteException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;
public class JacksonJsonUtil {
private static final Logger logger = LoggerFactory.getLogger(JacksonJsonUtil.class);
private static ObjectMapper mapper;
/**
* 获取ObjectMapper实例
*
* @param createNew 方式：true，新实例；false,存在的mapper实例
* @return
*/
public static synchronized ObjectMapper getMapperInstance() {
if (mapper == null) {
mapper = new ObjectMapper();
}
return mapper;
}
/**
* 将java对象转换成json字符串
*
* @param obj 准备转换的对象
* @return json字符串
* @throws Exception
*/
public static String beanToJson(Object obj) throws RouteException {
String json = null;
try {
ObjectMapper objectMapper = getMapperInstance();
json = objectMapper.writeValueAsString(obj);
} catch (Exception e) {
String errorMsg = "Class beanToJson faild";
throwsRouteException(errorMsg, e, "BEAN_TO_JSON_FAILD");
}
return json;
}
/**
* 将json字符串转换成java对象
*
* @param json 准备转换的json字符串
* @param cls 准备转换的类
* @return
* @throws Exception
*/
public static Object jsonToBean(String json, Class<?> cls) throws RouteException {
Object vo = null;
try {
ObjectMapper objectMapper = getMapperInstance();
vo = objectMapper.readValue(json, cls);
} catch (Exception e) {
String errorMsg = cls + " JsonTobean faild:" + e.getMessage();
throwsRouteException(errorMsg, e, "JSON_TO_BEAN_FAILD");
}
return vo;
}
/**
* 将json字符串转换成java集合对象
*
* @param json 准备转换的json字符串
* @param cls 准备转换的类
* @return
* @throws Exception
*/
public static <T> T jsonToListBean(String json, TypeReference<T> valueTypeRef) {
try {
ObjectMapper objectMapper = getMapperInstance();
return objectMapper.readValue(json, valueTypeRef);
} catch (Exception e) {
String errorMsg = " JsonTobean faild:" + e.getMessage();
logger.error(errorMsg);
}
return null;
}
private static void throwsRouteException(String errorMsg, Exception e, String errorCode)
throws RouteException {
String msg = errorMsg + ".errorMsg:" + e.getMessage();
logger.error(msg);
throw new RouteException(errorMsg, errorCode);
}
}
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