Java 如何首先在Apex Restful服务中获取access_令牌，以便从外部调用get/POST方法？

我正在从以下链接执行Salesforce trailhead:

在本教程中，他们使用

access\u token

调用

GET

请求但他们没有指导我们如何获取

访问令牌

，这是从外部调用APEX Rest的重要步骤

我不得不做下面的事情，它告诉我错误：

https://ap5.salesforce.com/services/oauth2/token?client_id="3MVG9d8..z.hDcPJZPIzGJ5UZDuKCOqbH8CCGCPnmwQuRbwLZ_2f.thbqWMX82H7JRGx4
6VYyEkuwzQ9._ww5"&client_secret="1180508865211885204"&username="pXXXXXXXXXXXXXXX.com"&password="AgXXXXXXXX"&grant_type=password

---

您可能需要调用api来获取访问令牌

这是我在C#中获取访问令牌的代码

异步公共静态任务GetAccessTokenByUserNamePasswordAuthenticationFlowAsync（字符串用户名、字符串密码、字符串令牌、字符串consumerKey、字符串ConsumerCret） {

        HttpClient authClient = new HttpClient();


        string sfdcConsumerKey = consumerKey;
        string sfdcConsumerSecret = consumerSecret;

        string sfdcUserName = username;
        string sfdcPassword = password;
        string sfdcToken = token;



        string loginPassword = sfdcPassword + sfdcToken;

        HttpContent content = new FormUrlEncodedContent(new Dictionary<string, string>
            {
                {"grant_type","password"},
                {"client_id",sfdcConsumerKey},
                {"client_secret",sfdcConsumerSecret},
                {"username",sfdcUserName},
                {"password",loginPassword}
            }
             );
        ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls11; //tuanv2t: Salesforce has changed to use TLS 1.1 -> 
        //tuanv2t: Without, responseString will like this {"error":"unknown_error","error_description":"retry your request"}
        HttpResponseMessage message = await authClient.PostAsync("https://login.salesforce.com/services/oauth2/token", content);

        string responseString = await message.Content.ReadAsStringAsync();

        //JObject obj = JObject.Parse(responseString);
        //var oauthToken = (string)obj["access_token"];
        //var serviceUrl = (string)obj["instance_url"];

        var result = new GetAccessTokenResponse();
        result.HttpResponseMessage = message;
        //Convert json string into object
        var accessTokenAPI = JsonConvert.DeserializeObject<AccessTokenAPI>(responseString);

        if (accessTokenAPI != null)
        {
            result.AccessToken = new AccessTokenModel();
            result.AccessToken.AccessToken = accessTokenAPI.access_token;
            result.AccessToken.Id = accessTokenAPI.id;
            result.AccessToken.InstanceUrl = accessTokenAPI.instance_url;
            result.AccessToken.IssuedAt = accessTokenAPI.issued_at;
            result.AccessToken.Signature = accessTokenAPI.signature;
            result.AccessToken.TokenType = accessTokenAPI.token_type;
        }
        return result;

    }

HttpClient authClient=newhttpclient（）；
字符串sfdcConsumerKey=consumerKey；
字符串SFDCConsumerCret=ConsumerCret；
字符串sfdcUserName=用户名；
字符串sfdcPassword=密码；
字符串sfdcToken=令牌；
字符串loginPassword=sfdcPassword+sfdcToken；
HttpContent=新的FormUrlEncodedContent（新字典
{
{“授权类型”，“密码”}，
{“客户id”，sfdcConsumerKey}，
{“客户机密”，SFDCConsumerCret}，
{“用户名”，sfdcUserName}，
{“密码”，登录密码}
}
);
ServicePointManager.SecurityProtocol=SecurityProtocolType.Tls11；//tuanv2t:Salesforce已更改为使用TLS 1.1->
//tuanv2t:如果没有，responseString将像这样{“error”：“unknown\u error”，“error\u description”：“重试您的请求”}
HttpResponseMessage=等待authClient.PostAsync（“https://login.salesforce.com/services/oauth2/token“，内容）；
string responseString=wait message.Content.ReadAsStringAsync（）；
//JObject obj=JObject.Parse（responseString）；
//var oauthToken=（字符串）obj[“访问令牌”]；
//var serviceUrl=（字符串）obj[“实例url”]；
var result=new GetAccessTokenResponse（）；
result.HttpResponseMessage=消息；
//将json字符串转换为对象
var accessTokenAPI=JsonConvert.DeserializeObject
我现在理解了这个概念，感谢分享其他链接

client\u id、client\u secret、username、password和grant\u type
应在
HTTP POST
正文中发送，而不在标题中

HttpRequest req = new HttpRequest();
req.setMethod('POST');
req.setHeader('Content-Type','application/x-www-form-urlencoded');
req.setEndpoint('https://ap5.salesforce.com/services/oauth2/token');

String CLIENT_ID = 'XXXXXXXXXXXXXXXXXXXXXXXXX';
String CLIENT_SECRET = 'XXXXXXXXXXXXXXXXXXXXXXX';
String USERNAME = 'XXXXXXXXXXXXXX';
String PASSWORD = 'XXXXXXXXXXXXXX';

req.setBody('grant_type=password' + '&client_id='+CLIENT_ID + 
            '&client_secret='+CLIENT_SECRET + '&username='+USERNAME + '&password='+PASSWORD);

Http http = new Http();
HTTPResponse response = http.send(req);
System.debug('Body ' + response.getBody());
System.debug('Status ' + response.getStatus());
System.debug('Status code ' + response.getStatusCode());

非常感谢。这肯定会有帮助。如果我需要使用邮递员或rest客户端怎么办？