如何从数组json对象访问值-javascript

我是初学者，请帮助我从下面的数组json对象中获取值

[{"Category":"HI","Sub Category":"AQ HIOP"},
{"Category":"2HJ","Sub Category":"AS HIOP"},
{"Category":"3HJ","Sub Category":"AT HIOP"},
{"Category":"4Hj","Sub Category":"AP HIOP"},
{"Category":"5HJ","Sub Category":"AN HIOP"},
]

我只需要子类别的值

---

提前谢谢。

你有多种方法可以做到这一点。如果对象位于变量中，则可以如下方式访问：

var test = [{"Category":"HI","Sub Category":"AQ HIOP"},
{"Category":"2HJ","Sub Category":"AS HIOP"},
{"Category":"3HJ","Sub Category":"AT HIOP"},
{"Category":"4Hj","Sub Category":"AP HIOP"},
{"Category":"5HJ","Sub Category":"AN HIOP"},
]

test[0]["Sub Category"] //Take into account that you have an array

test[0].Category;

如果钥匙中没有任何空间，您可以这样访问：

var test = [{"Category":"HI","Sub Category":"AQ HIOP"},
{"Category":"2HJ","Sub Category":"AS HIOP"},
{"Category":"3HJ","Sub Category":"AT HIOP"},
{"Category":"4Hj","Sub Category":"AP HIOP"},
{"Category":"5HJ","Sub Category":"AN HIOP"},
]

test[0]["Sub Category"] //Take into account that you have an array

test[0].Category;

如果JSON是字符串，则必须先使用JSON.parse

编辑 这里介绍了如何插入到新数组

var another_array = []
another_array.push({"New category": test[0]["Sub Category"]})

试试这个：

var arr=[{类别：HI，子类别：AQ HIOP}， {类别：2HJ，子类别：AS HIOP}， {类别：3HJ，子类别：AT HIOP}， {类别：4Hj，子类别：AP HIOP}， {类别：5HJ，子类别：AN HIOP}， ] 对于var i=0；i}arr[0]['Sub-Category']要访问第一个元素的子类别，子类别的值是什么意思？有5个不同的值，您想要哪一个？当然，您只需要声明一个变量数组，然后使用push方法在其中插入项。谢谢。是否可以将输出值分配给另一个数组，如下所示。另一个_数组=[新类别，测试[0][子类别]]查看答案的编辑