Answer by jursjohn

src/main/java/com/bytelegend/GitHubApiCommitObject.java

@@ -1,12 +1,14 @@
 package com.bytelegend;
 
+import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.DeserializationFeature;
 import com.fasterxml.jackson.databind.ObjectMapper;
 
 import java.io.File;
 import java.io.IOException;
 import java.nio.file.Files;
+import java.util.ArrayList;
 
 public class GitHubApiCommitObject {
     public static GitHubApiCommitObject fromJson(String json) throws JsonProcessingException {
@@ -20,4 +22,255 @@ public static void main(String[] args) throws IOException {
         String json = new String(Files.readAllBytes(new File("./commit.json").toPath()));
         GitHubApiCommitObject commit = GitHubApiCommitObject.fromJson(json);
     }
+
+    private Verification verification;
+
+    public Verification getVerification() {
+        return verification;
+    }
+
+    public void setVerification(Verification verification) {
+        this.verification = verification;
+    }
+
+    static class Verification {
+        private boolean verified;
+        private String reason;
+        private String signature;
+        private String payload;
+
+        public boolean isVerified() {
+            return verified;
+        }
+
+        public void setVerified(boolean verified) {
+            this.verified = verified;
+        }
+
+        public String getReason() {
+            return reason;
+        }
+
+        public void setReason(String reason) {
+            this.reason = reason;
+        }
+
+        public String getSignature() {
+            return signature;
+        }
+
+        public void setSignature(String signature) {
+            this.signature = signature;
+        }
+
+        public String getPayload() {
+            return payload;
+        }
+
+        public void setPayload(String payload) {
+            this.payload = payload;
+        }
+    }
+
+    public ArrayList<Parents> getParents() {
+        return parents;
+    }
+
+    public void setParents(ArrayList<Parents> parents) {
+        this.parents = parents;
+    }
+
+    private ArrayList<Parents> parents;
+
+    static class Parents {
+        private String url;
+        private String sha;
+        @JsonProperty("html_url")
+        private String htmlUrl;
+
+        public String getUrl() {
+            return url;
+        }
+
+        public void setUrl(String url) {
+            this.url = url;
+        }
+
+        public String getSha() {
+            return sha;
+        }
+
+        public void setSha(String sha) {
+            this.sha = sha;
+        }
+
+        public String getHtmlUrl() {
+            return htmlUrl;
+        }
+
+        public void setHtmlUrl(String htmlUrl) {
+            this.htmlUrl = htmlUrl;
+        }
+    }
+
+    private Committer committer;
+
+    public Committer getCommitter() {
+        return committer;
+    }
+
+    public void setCommitter(Committer committer) {
+        this.committer = committer;
+    }
+
+    private Author author;
+
+    public Author getAuthor() {
+        return author;
+    }
+
+    public void setAuthor(Author author) {
+        this.author = author;
+    }
+
+    public Tree getTree() {
+        return tree;
+    }
+
+    public void setTree(Tree tree) {
+        this.tree = tree;
+    }
+
+    private Tree tree;
+
+    static class Tree {
+        private String url;
+        private String sha;
+
+        public String getUrl() {
+            return url;
+        }
+
+        public void setUrl(String url) {
+            this.url = url;
+        }
+
+        public String getSha() {
+            return sha;
+        }
+
+        public void setSha(String sha) {
+            this.sha = sha;
+        }
+    }
+
+    private String message;
+
+    public String getMessage() {
+        return message;
+    }
+
+    public void setMessage(String message) {
+        this.message = message;
+    }
+
+    private String sha;
+    @JsonProperty("node_id")
+    private String nodeID;
+    private String url;
+    @JsonProperty("html_url")
+    private String htmlUrl;
+
+    public String getNodeID() {
+        return nodeID;
+    }
+
+    public void setNodeID(String nodeID) {
+        this.nodeID = nodeID;
+    }
+
+    public String getHtmlUrl() {
+        return htmlUrl;
+    }
+
+    public void setHtmlUrl(String htmlUrl) {
+        this.htmlUrl = htmlUrl;
+    }
+
+    public String getSha() {
+        return sha;
+    }
+
+    public void setSha(String sha) {
+        this.sha = sha;
+    }
+
+    public String getUrl() {
+        return url;
+    }
+
+    public void setUrl(String url) {
+        this.url = url;
+    }
+}
+
+class Author {
+    private String date;
+    private String name;
+    private String email;
+
+    public String getDate() {
+        return date;
+    }
+
+    public void setDate(String date) {
+        this.date = date;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
 }
+
+class Committer {
+    private String date;
+    private String name;
+    private String email;
+
+    public String getDate() {
+        return date;
+    }
+
+    public void setDate(String date) {
+        this.date = date;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
+}
+