开发过程中遇到一些对象转string和string转对象的问题,浪费了很久,现在用的熟练些了,总结如下:
1.字符串尽量定义成json可解析的,如{"name":"a","param":"b"},而不是{"a":"b"}
2.用到开源项目:fastjson
需要引入:
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.23</version>
</dependency>
import com.alibaba.fastjson.JSON;
使用方法:
1.string转对象:
string:str=
[{
"name": "HBaseService:v1",
"clusters": [{
"name": "5u",
"params": {
"zk": "xxx.xxx.xxx.xxx",
"port": "2180"
},
"methods": [{
"name": "sayhello",
"permission": true,
"qps": 188
}, {
"name": "sayhello",
"permission": true,
"qps": 188
}, {
"name": "sayhello",
"permission": true,
"qps": 188
}]
}, {
"name": "6u",
"params": {
"name": "zk",
"value": "xxxx:2180"
},
"methods": [{
"name": "sayhello",
"permission": true,
"qps": 188
}, {
"name": "sayhello",
"permission": true,
"qps": 188
}, {
"name": "sayhello",
"permission": true,
"qps": 188
}]
}]
}]
转对象,先定义成几个类:
1.
clusterinfo 其中包含变量name, params, List<MethodInfo>
2.methodInfo 其中包含变量name,permission,qps等
转对象:
JSONArray jsonArray = JSON.parseArray(str);
String new_str = jsonArray.get(i).toString();
logger.info("new_str:" + new_str);
ServiceInfo serviceInfo = JSON.parseObject(new_str, ServiceInfo.class);//转对象
2.对象转json:
List<ServiceConfigInfo> serviceConfigInfos = new ArrayList<ServiceConfigInfo>();
serviceConfigInfos.add(hbaseServiceImpl.hbaseContent());
JSON.toJSONString(serviceConfigInfos);//转string
好处:解析比较方便
劣处:需要定义多层类结构