JSON转List在平时的开发中经常遇到，这里介绍两张方法：

1.使用jackson（推荐，支持嵌套复杂结构）：

ObjectMapper mapper = new ObjectMapper();  
JavaType javaType = mapper.getTypeFactory().constructParametricType(List.class, MachineConnectResultVO.class);
List<MachineConnectResultVO> resMsg = new ArrayList<MachineConnectResultVO>();
try {resMsg =  (List<MachineConnectResultVO>)mapper.readValue(res, javaType);
} catch (IOException e) {e.printStackTrace();
}   

2.使用JsonArray：

JSONArray idsArr = JSONArray.fromObject(idStr);
List<DomainKeepOption> domainKeepOptionList = JSONArray.toList(idsArr, new DomainKeepOption(), new JsonConfig());

上面的XX.class可以是你自己定义的复杂VO，需要你提前按照JSON的格式构造好

public class MachineConnectResultVO {private String assetNum;private List<IpConnectVO> ips;getters and setters...
}

public class IpConnectVO {private String ip;private Boolean status;getter and setter...
}

public class DomainKeepOption {private Integer id;//域名idprivate Integer keepA;//1选中 0未选中private Integer keepHaiWai;//1选中 0未选中getter and setter...
}

有点要注意的是jsonArray这种形式不支持嵌套复杂类型的如上面的MachineConnectResultVO下又有IpConnectVO这个类型，jackson对这个支持的很好

而且jackson方法还可以用下面这个方式试下（没测试过），更加简洁明了

ObjectMapper mapper = new ObjectMapper();  
List<MachineConnectResultVO> aa = mapper.readValue(res, new TypeReference<List<MachineConnectResultVO>>() {});