所有
我在SAP的页面上找到了一个“ Crystal Report PDF转换器”的示例。它在“简单”报告中工作正常，但是当报告包含数据库连接时，它会失败。这是我得到的：
import com.crystaldecisions.sdk.occa.report.lib.*;
import com.crystaldecisions.sdk.occa.report.application.ReportClientDocument;
import com.crystaldecisions.sdk.occa.report.exportoptions.*;
//Java imports.
import java.io.*;
public class Reader {
// static final String REPORT_NAME = "C:\\works_fine.rpt";
static final String REPORT_NAME = "C:\\problematic.rpt";
static final String EXPORT_FILE = "C:\\myExportedReport.pdf";
public static void main(String[] args) {
try {
// Open report.
ReportClientDocument reportClientDoc = new ReportClientDocument();
reportClientDoc.open(REPORT_NAME, 0);
// NOTE: If parameters or database login credentials are required,
// they need to be set before.
// calling the export() method of the PrintOutputController.
// Export report and obtain an input stream that can be written to
// disk.
// See the Java Reporting Component Developer's Guide for more
// information on the supported export format enumerations
// possible with the JRC.
ByteArrayInputStream byteArrayInputStream = (ByteArrayInputStream) reportClientDoc
.getPrintOutputController().export(ReportExportFormat.PDF);
// Release report.
reportClientDoc.close();
// Use the Java I/O libraries to write the exported content to the
// file system.
byte byteArray[] = new byte[byteArrayInputStream.available()];
// Create a new file that will contain the exported result.
File file = new File(EXPORT_FILE);
FileOutputStream fileOutputStream = new FileOutputStream(file);
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream(
byteArrayInputStream.available());
int x = byteArrayInputStream.read(byteArray, 0,
byteArrayInputStream.available());
byteArrayOutputStream.write(byteArray, 0, x);
byteArrayOutputStream.writeTo(fileOutputStream);
// Close streams.
byteArrayInputStream.close();
byteArrayOutputStream.close();
fileOutputStream.close();
System.out
.println("Successfully exported report to " + EXPORT_FILE);
} catch (ReportSDKException ex) {
ex.printStackTrace();
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
import com.crystaldecisions.sdk.occa.report.lib.*;
import com.crystaldecisions.sdk.occa.report.application.ReportClientDocument;
import com.crystaldecisions.sdk.occa.report.exportoptions.*;
//Java imports.
import java.io.*;
public class Reader {
// static final String REPORT_NAME = "C:\\works_fine.rpt";
static final String REPORT_NAME = "C:\\problematic.rpt";
static final String EXPORT_FILE = "C:\\myExportedReport.pdf";
public static void main(String[] args) {
try {
// Open report.
ReportClientDocument reportClientDoc = new ReportClientDocument();
reportClientDoc.open(REPORT_NAME, 0);
// NOTE: If parameters or database login credentials are required,
// they need to be set before.
// calling the export() method of the PrintOutputController.
// Export report and obtain an input stream that can be written to
// disk.
// See the Java Reporting Component Developer's Guide for more
// information on the supported export format enumerations
// possible with the JRC.
ByteArrayInputStream byteArrayInputStream = (ByteArrayInputStream) reportClientDoc
.getPrintOutputController().export(ReportExportFormat.PDF);
// Release report.
reportClientDoc.close();
// Use the Java I/O libraries to write the exported content to the
// file system.
byte byteArray[] = new byte[byteArrayInputStream.available()];
// Create a new file that will contain the exported result.
File file = new File(EXPORT_FILE);
FileOutputStream fileOutputStream = new FileOutputStream(file);
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream(
byteArrayInputStream.available());
int x = byteArrayInputStream.read(byteArray, 0,
byteArrayInputStream.available());
byteArrayOutputStream.write(byteArray, 0, x);
byteArrayOutputStream.writeTo(fileOutputStream);
// Close streams.
byteArrayInputStream.close();
byteArrayOutputStream.close();
fileOutputStream.close();
System.out
.println("Successfully exported report to " + EXPORT_FILE);
} catch (ReportSDKException ex) {
ex.printStackTrace();
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
我甚至在导出调用之前添加了以下内容，但它仍然失败：
oracle.jdbc.pool.OracleDataSource ds
= new oracle.jdbc.pool.OracleDataSource();
ds.setDriverType("thin");
ds.setServerName("server");
ds.setPortNumber(123);
ds.setDatabaseName("database");
ds.setPassword("password");
ds.setUser("user");
如前所述，当我使用“works_fine”报告时，它就像一个冠军，但是一旦我使用“有问题”的报告，就会发生这种情况：
oracle.jdbc.pool.OracleDataSource ds
= new oracle.jdbc.pool.OracleDataSource();
ds.setDriverType("thin");
ds.setServerName("server");
ds.setPortNumber(123);
ds.setDatabaseName("database");
ds.setPassword("password");
ds.setUser("user");
值得一提的是，我是Crystal Reports的新手并创建了JNDI名称。
非常感谢任何形式的帮助。感谢。
答案 0 :(得分：0)
我通过覆盖连接属性解决了这个问题：
package com.org;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import com.crystaldecisions.sdk.occa.report.application.ReportClientDocument;
import com.crystaldecisions.sdk.occa.report.data.ConnectionInfoKind;
import com.crystaldecisions.sdk.occa.report.data.IConnectionInfo;
import com.crystaldecisions.sdk.occa.report.data.ITable;
import com.crystaldecisions.sdk.occa.report.exportoptions.ReportExportFormat;
import com.crystaldecisions.sdk.occa.report.lib.PropertyBag;
import com.crystaldecisions.sdk.occa.report.lib.ReportSDKException;
public class YetAnotherReader {
public static void main(String[] args) {
try {
//Overwrite any existing properties with updated values.
//information Oracle database
String DBUSERNAME = "user";
String DBPASSWORD = "password";
String SERVERNAME = "server";
String PORT = "1521";
String DATABASE_NAME = "databaseName"; // SID or Instance
String URI = "!oracle.jdbc.driver.OracleDriver!jdbc:oracle:thin:{userid}/{password}@" + SERVERNAME + ":" + PORT + "/" + DATABASE_NAME; //1521/ or :1521
String DATABASE_DLL = "crdb_jdbc.dll";
//end
String report_name = "C:\\myReport.rpt";
String exportFileName = "C:\\fileName.pdf";
ReportClientDocument clientDoc = new ReportClientDocument();
clientDoc.open(report_name, ReportExportFormat._PDF);
// Obtain collection of tables from this database controller.
ITable table = clientDoc.getDatabaseController().getDatabase().getTables().getTable(0);
IConnectionInfo connectionInfo = table.getConnectionInfo();
PropertyBag propertyBag = connectionInfo.getAttributes();
propertyBag.clear();
//Overwrite any existing properties with updated values.
propertyBag.put("Trusted_Connection", "false");
propertyBag.put("Server Name", SERVERNAME); //Optional property.
propertyBag.put("Database Name", DATABASE_NAME);
propertyBag.put("Server Type", "JDBC (JNDI)");
propertyBag.put("URI", URI);
propertyBag.put("Use JDBC", "true");
propertyBag.put("Database DLL", DATABASE_DLL);
connectionInfo.setAttributes(propertyBag);
//Set database username and password.
//NOTE: Even if these the username and password properties don't change when switching databases, the
//database password is *not* saved in the report and must be set at runtime if the database is secured.
connectionInfo.setUserName(DBUSERNAME);
connectionInfo.setPassword(DBPASSWORD);
connectionInfo.setKind(ConnectionInfoKind.SQL);
table.setConnectionInfo(connectionInfo);
//Update old table in the report with the new table.
clientDoc.getDatabaseController().setTableLocation(table, table);
clientDoc.getDataDefController().getParameterFieldController().setCurrentValue("", "pk_id", 14);
//Writing into PDF file
ByteArrayInputStream bais = (ByteArrayInputStream) clientDoc.getPrintOutputController().export(ReportExportFormat.PDF);
int size = bais.available();
byte[] barray = new byte[size];
FileOutputStream fos = new FileOutputStream(new File(exportFileName));
ByteArrayOutputStream baos = new ByteArrayOutputStream(size);
int bytes = bais.read(barray, 0, size);
baos.write(barray, 0, bytes);
baos.writeTo(fos);
clientDoc.close();
bais.close();
baos.close();
fos.close();
//dbConn.close();
} catch (ReportSDKException ex) {
System.out.println("ReportSDKException" + ex);
} catch (Exception ex) {
System.out.println("Exception" + ex);
}
}
}
另外，请注意使用主键（您可能也想更改它）：
clientDoc.getDataDefController().getParameterFieldController().setCurrentValue("", "pk_id", 14);
“pk_id”是报告中使用的参数。示例：
SELECT * FROM myTableOrView WHERE id < {?pk_id}
来源：Here