JAVA JSON Connector

In this article you will learn, how to integrate JSON data to JAVA without coding in few clicks (Live / Bi-directional connection to JSON). JSON Connector can be used to extract and output JSON data stored in local JSON files, JSON data coming from REST API web service calls (Web URL) or direct JSON String (variables or DB columns). JSON Connector also supports JSONPath to filter data from nested array/sub-documents. This Connector is optimized to work with very large files.

Using JSON API Connector you will be able to connect, read and write data from within JAVA. Let's take a look at the steps below to see how exactly to accomplish that.

Download  Help File  Buy 

Create Data Source in ZappySys Data Gateway based on ZappySys JSON Driver

  1. Download and install ZappySys ODBC PowerPack.

  2. Search for gateway in start menu and Open ZappySys Data Gateway:
    Open ZappySys Data Gateway

  3. Go to Users Tab to add our first Gateway user. Click Add; we will give it a name tdsuser and enter password you like to give. Check Admin option and click OK to save. We will use these details later when we create linked server:
    ZappySys Data Gateway - Add User

  4. Now we are ready to add a data source. Click Add, give data source a name (Copy this name somewhere, we will need it later) and then select Native - ZappySys JSON Driver. Finally, click OK.

    ZappySys Data Gateway - Add JSON Data Source

  5. Select Url or File and paste the following Url for this example.
    NOTE: Here for demo, I'm using odata API, but you need to refer your own API documentation and based on that you need to use your own API URL and need to configure connection based on API Authentication type

  6. Now enter JSONPath expression in Array Filter textbox to extract only specific part of JSON file as below ($.value[*] will get content of value attribute from JSON document. Value attribute is array of JSON documents so we have to use [*] to indicate we want all records of that array)
    NOTE: Here, I'm using my desired filter, but you need to select your desired filter based on your requirement.
    Click on Test Connection button to view whether the Test Connection is SUCCESSFUL or Not.

    $.value[*]
    ZappySys ODBC Driver - Configure JSON Driver
  7. Once you configured a data source, you can preview data. Hit Preview tab, and use similar settings to preview data:
    ZappySys ODBC Driver - Preview JSON Driver

  8. Click OK to finish creating the data source

Read data in Java from the DSN

  1. Java code to get the data:

    "jdbc:sqlserver://localhost:5000;databasename=JsonDSN;user=tdsuser;password=test"
    Java code to Make ZappySys Driver Data Source Call

  2. When you run the code it will make the API call and read the data:
    Java code ZappySys Driver Data Source Results

  3. Here is Java program's code in text format:

    
        //Step-1: Install ZappySys ODBC PowerPack and Configure Data Gateway
    
        //Step-2:Assuming the Microsoft SQL Server Jdbc Driver is in below folder
        //C:\Program Files\Microsoft Jdbc Driver 6.0 for SQL Server\sqljdbc_6.0\enu\auth\x64
    
        package padaone;
    
        import java.sql.*;
    
        public class zappy {
    
        public static void main(String[] args) {
    
        // Create a variable for the connection string.
        String connectionUrl = "jdbc:sqlserver://localhost:5000;databasename=JsonDSN;user=test;password=test";
    
        // Declare the JDBC objects.
        Connection con = null;
        Statement stmt = null;
        ResultSet rs = null;
    
        try {
        // Establish the connection.
        Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
        con = DriverManager.getConnection(connectionUrl);
    
        // Create and execute an SQL statement that returns some data.
        String SQL = "SELECT Country , SUM(UnitPrice * Quantity) Total "
        + "FROM value "
        + "GROUP BY Country "
        + "WITH (SRC='https://services.odata.org/V3/Northwind/Northwind.svc/Invoices?$format=json')";
        stmt = con.createStatement();
        rs = stmt.executeQuery(SQL);
    
        // Iterate through the data in the result set and display it.
        while (rs.next()) {
        System.out.println(rs.getString(1) + " " + rs.getString(2));
        }
        }
    
        // Handle any errors that may have occurred.
        catch (Exception e) {
        e.printStackTrace();
        }
    
        finally {
        if (rs != null) try { rs.close(); } catch(Exception e) {}
        if (stmt != null) try { stmt.close(); } catch(Exception e) {}
        if (con != null) try { con.close(); } catch(Exception e) {}
        }
        }
        }
    
    

Create Custom Store Procedure in ZappySys Driver

You can create procedures to encapsulate custom logic and then only pass handful parameters rather than long SQL to execute your API call.

Steps to create Custom Store Procedure in ZappySys Driver. You can insert Placeholders anywhere inside Procedure Body. Read more about placeholders here

  1. Go to Custom Objects Tab and Click on Add button and Select Add Procedure:
    ZappySys Driver - Add Store Procedure

  2. Enter the desired Procedure name and click on OK:
    ZappySys Driver - Add Store Procedure Name

  3. Select the created Store Procedure and write the your desired store procedure and Save it and it will create the custom store procedure in the ZappySys Driver:
    Here is an example stored procedure for ZappySys Driver. You can insert Placeholders anywhere inside Procedure Body. Read more about placeholders here

    CREATE PROCEDURE [usp_get_orders]
    @fromdate = '<<yyyy-MM-dd,FUN_TODAY>>'
    AS
    SELECT * FROM Orders where OrderDate >= '<@fromdate>'

    ZappySys Driver - Create Custom Store Procedure

  4. That's it now go to Preview Tab and Execute your Store Procedure using Exec Command. In this example it will extract the orders from the date 1996-01-01:

    Exec usp_get_orders '1996-01-01'

    ZappySys Driver - Execute Custom Store Procedure

Create Custom Virtual Table in ZappySys Driver

ZappySys API Drivers support flexible Query language so you can override Default Properties you configured on Data Source such as URL, Body. This way you dont have to create multiple Data Sources if you like to read data from multiple EndPoints. However not every application support supplying custom SQL to driver so you can only select Table from list returned from driver.

Many applications like MS Access, Informatica Designer wont give you option to specify custom SQL when you import Objects. In such case Virtual Table is very useful. You can create many Virtual Tables on the same Data Source (e.g. If you have 50 URLs with slight variations you can create virtual tables with just URL as Parameter setting.

  1. Go to Custom Objects Tab and Click on Add button and Select Add Table:
    ZappySys Driver - Add Table

  2. Enter the desired Table name and click on OK:
    ZappySys Driver - Add Table Name

  3. And it will open the New Query Window Click on Cancel to close that window and go to Custom Objects Tab.

  4. Select the created table, Select Text Type AS SQL and write the your desired SQL Query and Save it and it will create the custom table in the ZappySys Driver:
    Here is an example SQL query for ZappySys Driver. You can insert Placeholders also. Read more about placeholders here

    SELECT
    "ShipCountry",
    "OrderID",
    "CustomerID",
    "EmployeeID",
    "OrderDate",
    "RequiredDate",
    "ShippedDate",
    "ShipVia",
    "Freight",
    "ShipName",
    "ShipAddress",
    "ShipCity",
    "ShipRegion",
    "ShipPostalCode"
    FROM "Orders"
    Where "ShipCountry"='USA'

    ZappySys Driver - Create Custom Table

  5. That's it now go to Preview Tab and Execute your custom virtual table query. In this example it will extract the orders for the USA Shipping Country only:

    SELECT * FROM "vt__usa_orders_only"

    ZappySys Driver - Execute Custom Virtual Table Query

Conclusion

In this article we discussed how to connect to JSON in JAVA and integrate data without any coding. Click here to Download JSON Connector for JAVA and try yourself see how easy it is. If you still have any question(s) then ask here or simply click on live chat icon below and ask our expert (see bottom-right corner of this page).

Documentation 

Other App Integration scenarios for JSON

Other API Connectors for JAVA


Documentation 

  • How to connect JSON in JAVA?

  • How to get JSON data in JAVA?

  • How to read JSON data in JAVA?

  • How to load JSON data in JAVA?

  • How to import JSON data in JAVA?

  • How to pull JSON data in JAVA?

  • How to push data to JSON in JAVA?

  • How to write data to JSON in JAVA?

  • How to POST data to JSON in JAVA?

  • Call JSON API in JAVA

  • Consume JSON API in JAVA

  • JSON JAVA Automate

  • JSON JAVA Integration

  • Integration JSON in JAVA

  • Consume real-time JSON data in JAVA

  • Consume realtime JSON API data in JAVA

  • JSON ODBC Driver | ODBC Driver for JSON | ODBC JSON Driver | SSIS JSON Source | SSIS JSON Destination

  • Connect JSON in JAVA

  • Load JSON in JAVA

  • Load JSON data in JAVA

  • Read JSON data in JAVA

  • JSON API Call in JAVA