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