In this post i’ll show how to build simple rest backend using by java spring and jdbctemplate

In this project we have an ER Diagram for specific requirements.

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I created some Models in java for our objects and mappings.

Created 2 controllers for two different situtations. My case these was Admins and users.

@PreAuthorize("hasAuthority('Admin')")
@PostMapping("/author/add")
public ResponseEntity<Author>addAuthor(@RequestBody Author author){
    return new ResponseEntity<>(authorService.addAuthor(author),HttpStatus.OK);
    }

Using preauthorize annotations for giving access to admins. Others cannot access these links.

After that i have to define services and repositories.

Used interfaces to understand and show better view of editing and reviewing.

Repos looks like these:

Sample code for AuthorRepository

public List<Author> getAllAuthors() {
        List<Author> tmp = jdbcTemplate.query("select authorID,authorName,authorLastName from FAHRI2.AUTHOR ORDER BY authorID"
                ,(rs,rowNum) ->new Author(rs.getInt("authorID"),rs.getString("authorName"),rs.getString("authorLastName")));
    return tmp;
    }

Used Oracle DB 11g for this project and Spring JDBCTemplate for db connections.

Codes in my github repo check out all codes here. https://github.com/ffahri/LibraryAutomationBackend

When we login the system using Postman

localhost:8090/oauth/token

We should use basic auth for getting oAuth token.

{
    "access_token": "your_access_token_will_be_here",
    "token_type": "bearer",
    "expires_in": 36000,
    "scope": "read write",
    "jti": "your-jti-will-be-here"
}

Using this token to list all authors.

Specify Get method because we used @GetMapping in our code. And we show our authorlist

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