Export Crystal Report to PDF by using Java Program

Here I am using some crystal report which will connect to database and fetch the data to create report.
It will expect username and password from the calling function.
Also it will expect some parameter(Name) from the calling function. Below is the code
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.util.Date;
import com.crystaldecisions.sdk.occa.report.application.ReportClientDocument;
import com.crystaldecisions.*;
import com.crystaldecisions.sdk.occa.report.data.Connections;
import com.crystaldecisions.sdk.occa.report.data.Fields;
import com.crystaldecisions.sdk.occa.report.data.IConnection;
import com.crystaldecisions.sdk.occa.report.data.ParameterField;
import com.crystaldecisions.sdk.occa.report.exportoptions.ReportExportFormat;
public [...]

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