js json 循环输出

var jsonObj = {
  "name": "John",
  "age": 30,
  "city": "New York"
};

for (var key in jsonObj) {
  if (jsonObj.hasOwnProperty(key)) {
    console.log(key + ": " + jsonObj[key]);
  }
}

name: John
age: 30
city: New York

var jsonArray = [
  { "name": "John", "age": 30, "city": "New York" },
  { "name": "Jane", "age": 28, "city": "Los Angeles" }
];

jsonArray.forEach(function(item) {
  console.log("Name: " + item.name);
  console.log("Age: " + item.age);
  console.log("City: " + item.city);
  console.log('---');
});

Name: John
Age: 30
City: New York
---
Name: Jane
Age: 28
City: Los Angeles
---

var jsonString = '{"name": "John", "age": 30, "city": "New York"}';
var jsonObj = JSON.parse(jsonString);

// 然后使用上述方法之一进行遍历