'无法从节点js中的JSON对象获取值

I have a jsp file that returns a json object using the following code:

我有一个jsp文件,使用以下代码返回一个json对象:

    JSONObject object = new JSONObject();

    object.put("name","domain");
    object.put("email","domain.com");

    response.setContentType("application/json");
    response.getWriter().write(object.toString());

The output is: {"name":"domain","email":"domain.com"}

输出为:{“name”:“domain”,“email”:“domain.com”}

I trying to get the values from this JSON using following code in node.js:

我尝试使用node.js中的以下代码从此JSON获取值:

        var endpoint = // contains the address of the above jsp file;

        var body = ""
        http.get(endpoint, (response) => {
          response.on('data', (chunk) => { body += chunk })
          response.on('end', () => {
            console.log("Body: "+body);
            console.log("Body name: "+body.name);
          })
        })

In the above snippet I get following output for console.log -

在上面的代码片段中,我得到了console.log的以下输出 -

Body: {"name":"domain","email":"domain.com"}

Body name: undefined

正文名称:未定义

I don't know why "body.name" is not working. Could any body please help in getting the values from the json object. Since, body itself is json object so I don't need to do JSON.parse

我不知道为什么“body.name”不起作用。任何正文可以帮助从json对象获取值。因为,body本身就是json对象,所以我不需要做JSON.parse

2 个解决方案

#1

Try this. You have to parse the JSON string to assign it to a js object.

尝试这个。您必须解析JSON字符串以将其分配给js对象。

    var endpoint = // contains the address of the above jsp file;

    var body = {}
    http.get(endpoint, (response) => {
      response.on('data', (chunk) => { body = JSON.parse(chunk) })
      response.on('end', () => {
        console.log("Body: "+body);
        console.log("Body name: "+body.name);
      })
    })

#2

body object is string. Because of that when you try to write it in console:

body对象是字符串。因此,当您尝试在控制台中编写它时:

console.log("Body: "+body);

You get this:

你得到这个:

Body: {"name":"domain","email":"domain.com"}

But since body is string you cannot get its property name. String doesn't have proerty name. You should firstly parse string to JSON

但由于body是字符串,因此无法获取其属性名称。 String没有proerty名称。您应该首先将字符串解析为JSON

    var endpoint = // contains the address of the above jsp file;

    var body = ""
    http.get(endpoint, (response) => {
      response.on('data', (chunk) => { body += chunk })
      response.on('end', () => {
        console.log("Body: "+ body);
        var parsedBody = JSON.parse(body);
        console.log("Body name: "+ parsedBody .name);
      })
    })

#1