com.google.api.client.json.jackson.JacksonFactory; missing in Google Drive example

问题

I tried running the quickstart-sample, and this dependency:

<dependency>
      <groupId>com.google.apis</groupId>
      <artifactId>google-api-services-drive</artifactId>
<version>v2-rev78-1.15.0-rc</version>
</dependency>

from Drive wiki API page

Yet when I try to compile the code com.google.api.client.json.jackson.JacksonFactory; is missing.
To verify this you just need to do Step 2 & 3! Where can I find this class or how can I replace it in the sample?

回答1:

Jackson library can be found at http://repo2.maven.org/maven2/com/google/http-client/google-http-client-jackson/

For July 7, last version can be obtained by Maven

<dependency>
    <groupId>com.google.http-client</groupId>
    <artifactId>google-http-client-jackson</artifactId>
    <version>1.15.0-rc</version>
</dependency>

You may also need

<dependency>
    <groupId>com.google.oauth-client</groupId>
    <artifactId>google-oauth-client-java6</artifactId>
    <version>1.15.0-rc</version>
</dependency>

回答2:

Use this class for JacksonFactory instead of the previous one.

com.google.api.client.json.jackson2.JacksonFactory

回答3:

Since version 1.11, jackson library has been moved out to separate jar to provide developers better choice of versions of each library. Please check readme.html of zip file you downloaded from google-api-java-client and you can check which specific jar file you want to include in your project.

回答4:

http://mvnrepository.com/artifact/com.google.api.client/google-api-client/1.4.1-beta

This dependency will solve your problem:

<dependency>
<groupId>com.google.api.client</groupId>
<artifactId>google-api-client</artifactId>
<version>1.4.1-beta</version>
</dependency>

回答5:

For gradle.build =

compile group: 'com.google.http-client', name: 'google-http-client-jackson2', version: '1.11.0-beta' 

来源：https://stackoverflow.com/questions/17231722/com-google-api-client-json-jackson-jacksonfactory-missing-in-google-drive-examp