Question

我有这个JSON响应/

float

我可以使用

获取每个值

{  
   "phweb":{  
      "name":"PH Web Server",
      "cpu":"36.7",
      "ram":"33.0",
      "hdd":"43.0",
      "os":{  
         "osup":"2 days, 23 hours, 5 minutes and 34 seconds",
         "osstat":"0"
      },
      "apache":{  
         "apachestat":"0",
         "apacheup":"33 days, 2 hours, 9 minutes and 16 seconds"
      },
      "sql":{  
         "sqlstat":"0",
         "sqlup":"154 days, 2 hours, 16 minutes and 53 seconds"
      }
   },
   "phdbm":{  
      "name":"PH DBM Server",
      "cpu":"15.9",
      "ram":"10.7",
      "hdd":"23.7",
      "os":{  
         "osup":"2 days, 23 hours, 6 minutes and 21 seconds",
         "osstat":"0"
      },
      "apache":{  
         "apachestat":"0",
         "apacheup":"103 days, 4 hours, 43 minutes and 56 seconds"
      },
      "sql":{  
         "sqlstat":"0",
         "sqlup":"12 days, 4 hours, 43 minutes and 42 seconds"
      }
   }
}

如何获取具有子数组值的响应值的值，例如

$.each(response, function(index, value){
    console.log(index + " " + value);
});

“phweb”索引的

（假设我想从'phweb'的'os'获取'osup'？我如何检查它是否为空或确实存在（以避免错误）？

Answer 1

首先是JSON object而不是JSON array。

您可以使用key直接访问它。

使用变量名称，例如obj，并使用.运算符，并键入该键的值。

在下面的示例中，它是obj.phweb.os，这意味着obj是具有多个键值对的JSON对象，包括键phweb，phweb和os相同。

请记住：JSON对象具有key value并且在{}中包含，而数组具有索引并包裹在[]中。

var obj = {  
   "phweb":{  
      "name":"PH Web Server",
      "cpu":"36.7",
      "ram":"33.0",
      "hdd":"43.0",
      "os":{  
         "osup":"2 days, 23 hours, 5 minutes and 34 seconds",
         "osstat":"0"
      },
      "apache":{  
         "apachestat":"0",
         "apacheup":"33 days, 2 hours, 9 minutes and 16 seconds"
      },
      "sql":{  
         "sqlstat":"0",
         "sqlup":"154 days, 2 hours, 16 minutes and 53 seconds"
      }
   },
   "phdbm":{  
      "name":"PH DBM Server",
      "cpu":"15.9",
      "ram":"10.7",
      "hdd":"23.7",
      "os":{  
         "osup":"2 days, 23 hours, 6 minutes and 21 seconds",
         "osstat":"0"
      },
      "apache":{  
         "apachestat":"0",
         "apacheup":"103 days, 4 hours, 43 minutes and 56 seconds"
      },
      "sql":{  
         "sqlstat":"0",
         "sqlup":"12 days, 4 hours, 43 minutes and 42 seconds"
      }
   }
}

console.log(obj.phweb.os);

获取具有子数组json值的数组的值

1 个答案: