j1=[

{"id":"1","name":"a"},

{"id":"2","name":"b"}

]

j2=[

{"id":"3","name":"c"},

{"id":"4","name":"d"}

]

怎么合并成一个Json对象？

j1=[

{"id":"1","name":"a"},

{"id":"2","name":"b"},

{"id":"3","name":"c"},

{"id":"4","name":"d"}

]