两个Object根据key赋值合并(Object.keys)

let obj1={
    name:'111',
    age:20,
    sex:1
}
let obj2={
    name:'222',
    age:45
}
Object.keys(obj1).forEach(i=>{
    if(obj2[i]){
      obj1[i]=obj2[i]
    }
})
console.log(obj1)//{name: "222", age: 45, sex: 1}