Answer by chesterbachelor

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

@@ -1,23 +1,266 @@
 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.List;
 
-public class GitHubApiCommitObject {
-    public static GitHubApiCommitObject fromJson(String json) throws JsonProcessingException {
-        ObjectMapper mapper =
-                new ObjectMapper()
-                        .configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
-        return mapper.readValue(json, GitHubApiCommitObject.class);
-    }
+    private String sha;
+    @JsonProperty("node_id")
+    private String nodeId;
+    private String url;
+    @JsonProperty("html_url")
+    private String htmlUrl;
+    private Author author;
+    private Committer committer;
+    private String message;
+    private Tree tree;
+    private List<Parent> parents;
+    private Verification verification;
 
     public static void main(String[] args) throws IOException {
         String json = new String(Files.readAllBytes(new File("./commit.json").toPath()));
         GitHubApiCommitObject commit = GitHubApiCommitObject.fromJson(json);
+        System.out.println(commit);
+    }
+
+    public static GitHubApiCommitObject fromJson(String json) throws JsonProcessingException {
+        ObjectMapper mapper = new ObjectMapper().configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
+        return mapper.readValue(json, GitHubApiCommitObject.class);
+    }
+
+    public String getSha() {
+        return sha;
+    }
+
+    public void setSha(String sha) {
+        this.sha = sha;
+    }
+
+    public String getNodeId() {
+        return nodeId;
+    }
+
+    public void setNodeId(String nodeId) {
+        this.nodeId = nodeId;
+    }
+
+    public String getUrl() {
+        return url;
+    }
+
+    public void setUrl(String url) {
+        this.url = url;
+    }
+
+    public String getHtmlUrl() {
+        return htmlUrl;
+    }
+
+    public void setHtmlUrl(String htmlUrl) {
+        this.htmlUrl = htmlUrl;
+    }
+
+    public Author getAuthor() {
+        return author;
+    }
+
+    public void setAuthor(Author author) {
+        this.author = author;
+    }
+
+    public Committer getCommitter() {
+        return committer;
+    }
+
+    public void setCommitter(Committer committer) {
+        this.committer = committer;
+    }
+
+    public String getMessage() {
+        return message;
+    }
+
+    public void setMessage(String message) {
+        this.message = message;
+    }
+
+    public Tree getTree() {
+        return tree;
+    }
+
+    public void setTree(Tree tree) {
+        this.tree = tree;
+    }
+
+    public List<Parent> getParents() {
+        return parents;
+    }
+
+    public void setParents(List<Parent> parents) {
+        this.parents = parents;
+    }
+
+    public Verification getVerification() {
+        return verification;
+    }
+
+    public void setVerification(Verification verification) {
+        this.verification = verification;
+    }
+
+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;
     }
 }
+
+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 Parent {
+    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;
+    }
+}
+
+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;
+    }
+}
+
+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;
+    }
+}