Note
utility hypertext mark will navigate to respective motes.md file
| Utility | Package Name | Topics covered |
|---|---|---|
| Json Paring | src/main/java/jsonParsing | - JSONObject, POJO, serialization - deserialization - Object Mapper - Jackson API, - org.json.JSONObject - org.json.simple - Json to Excel |
| Database Connection | src/main/java/DataBaseConnection | - how to establish DB connection link - Fetching data from DB - Storing fetched Data into *.json - Execute query, ExecuteUpdate -Prepared Statements -setAutoCommit - Hikari CP |
| Password Protection | src/main/java/Password_Protection | - Password encryption & description - Use char[] instead of String to store Passwords |
| Unix Commands | src/main/java/unix_commands | - Basic Unix commands |
| Unix Playground | src/main/java/unix_playground | - Shell script execution(using process builder , using plexus utils, Using JSCH) |
| Docker | src/main/java/docker | - How to create docker images - Docker compose yaml example |
| Maven | src/main/java/maven | - maven notes |
| Http Client | src/main/java/httpClientLibrary | - Http client Sync and Async |
Important
Points to remember:
| Topics | Link |
|---|---|
| @JsonProperty("field_name") | - https://stackoverflow.com/questions/53191468/no-creators-like-default-construct-exist-cannot-deserialize-from-object-valu - https://www.concretepage.com/jackson-api/jackson-jsonproperty-and-jsonalias-example |
| org.json.JSONObject | is best in converting string to json object, json array on the fly |
| Password Protection | Never store password in String in java instead use char[] video_link, Oracle_recommendation |