关于java：如何将ArrayList转换为Array

How to convert an ArrayList to Array

本问题已经有最佳答案，请猛点这里访问。

我无法实现将整个AARYLIST传递给Java程序中的一个方法。我在论坛中搜索并尝试了一些其他程序员能够解决的解决方案，但在我的程序中，我无法实现相同的解决方案。

我在这里附加了代码，并突出显示了我所面对的问题所在的行。

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import java.io.File;
import java.util.Calendar;
import java.util.GregorianCalendar;
import java.util.Iterator;
import java.sql.*;
import java.util.ArrayList;
import java.util.List;

import org.apache.axiom.om.OMElement;
import org.apache.axis2.context.ConfigurationContext;
import org.apache.axis2.context.ConfigurationContextFactory;

import com.mercury.itg.ws.dm.client.AddRequestNotesDocument;
import com.mercury.itg.ws.dm.client.AddRequestNotesResponseDocument;
import com.mercury.itg.ws.dm.client.Column;
import com.mercury.itg.ws.dm.client.CreateRequestDocument;
import com.mercury.itg.ws.dm.client.CreateRequestResponseDocument;
import com.mercury.itg.ws.dm.client.DeleteRequestsDocument;
import com.mercury.itg.ws.dm.client.DeleteRequestsResponseDocument;
import com.mercury.itg.ws.dm.client.DemandServiceStub;
import com.mercury.itg.ws.dm.client.ExecuteWFTransitionsDocument;
import com.mercury.itg.ws.dm.client.ExecuteWFTransitionsResponseDocument;
import com.mercury.itg.ws.dm.client.GetRequestsDocument;
import com.mercury.itg.ws.dm.client.GetRequestsResponseDocument;
import com.mercury.itg.ws.dm.client.Identifier;
import com.mercury.itg.ws.dm.client.Note;
import com.mercury.itg.ws.dm.client.RemoteReference;
import com.mercury.itg.ws.dm.client.Request;
import com.mercury.itg.ws.dm.client.SetRequestFieldsDocument;
import com.mercury.itg.ws.dm.client.SetRequestFieldsResponseDocument;
import com.mercury.itg.ws.dm.client.SetRequestRemoteReferenceStatusDocument;
import com.mercury.itg.ws.dm.client.SetRequestRemoteReferenceStatusResponseDocument;
import com.mercury.itg.ws.dm.client.SimpleField;
import com.mercury.itg.ws.dm.client.Table;
import com.mercury.itg.ws.dm.client.URLReference;

import oracle.jdbc.OracleTypes;
import oracle.jdbc.OracleDriver;

public class PMCDeleteRequest {

protected ConfigurationContext ctx = null;

public PMCDeleteRequest() {
final String repositoryPath = System.getProperty("client.repository.dir");
final String axis2 = repositoryPath +"/conf/client-axis2.xml";
final File file = new File(axis2);
if (file.exists()) {
try {
this.ctx = ConfigurationContextFactory.createConfigurationContextFromFileSystem(repositoryPath, axis2);
} catch (final Exception e) {
e.printStackTrace();
System.exit(1);
}
}
}
String name;
public void setName(String name) {
this.name = name;
}
/**
* The main program Parameter: args[0] - service URL. e.g.
* http://server:port/itg/ppmservices/DemandService
*/

public static void main(final String[] args) throws Exception {

String URL = args[0];
String username = args[1];
String password = args[2];
String requestids = args[3];
Class.forName("oracle.jdbc.driver.OracleDriver");
Connection con = DriverManager.getConnection(URL, username, password);
String request_ids = requestids;
String commaSeparateRequestIds = request_ids.replaceAll("#@#",",");
String request_delete_sql ="SELECT REQUEST_ID FROM (SELECT KFMP.REQUEST_ID FROM KCRT_FG_MASTER_PROJ_REF KFMP, PM_PROJECTS PP WHERE KFMP.REF_MASTER_PROJECT_ID = PP.PROJECT_ID AND PP.PROJECT_ID IN ("
+ commaSeparateRequestIds +"))";
PreparedStatement sgStmt = con.prepareStatement(request_delete_sql);
ResultSet rs = sgStmt.executeQuery();
List<String> delete = new ArrayList<String>();
try {
while (rs.next()) {

final String serviceURL ="https://.../DemandService";
String requestId = Integer.toString(rs.getInt(1));

delete.add(requestId);

}
System.out.println("arraylist:"+delete);

pmc.deleteRequests(serviceURL,delete); // Here i am unable to pass the entire arraylist

}

catch (final Exception e) {
if (e instanceof org.apache.axis2.AxisFault) {
final org.apache.axis2.AxisFault xe = (org.apache.axis2.AxisFault) e;
System.out.println(xe.getMessage());
System.out.println("---detail---");
final Iterator iter = xe.getDetail().getChildElements();
while (iter.hasNext()) {
final OMElement item = (OMElement) iter.next();
System.out.println(item.getText());
}
System.out.println("------------");
} else {
throw e;

}
System.exit(1);
}

rs.close();
con.close();

}

private void deleteRequests(final String serviceURL, final String[] requestIds) throws Exception {

// construct the Identifier array
final Identifier[] ids = new Identifier[requestIds.length];

for (int i = 0; i < requestIds.length; i++) {

ids[i] = Identifier.Factory.newInstance();
ids[i].setId(requestIds[i]);

}

// get Webservice handle

final DemandServiceStub stub = new DemandServiceStub(this.ctx, serviceURL);

// Construct message to send
final DeleteRequestsDocument inDoc = DeleteRequestsDocument.Factory.newInstance();

final DeleteRequestsDocument.DeleteRequests deletes = inDoc.addNewDeleteRequests();

deletes.setRequestIdsArray(ids);

//Set the path for cacerts for searching certificate before invoking web service
System.setProperty("javax.net.ssl.trustStore","C:\\Java\\jdk1.7.0_80\\jre\\lib\\security\\cacerts");
// Invoke web service
final DeleteRequestsResponseDocument outDoc = stub.deleteRequests(inDoc);

// Process the return request
final int returnCode = outDoc.getDeleteRequestsResponse().getReturn();
System.out.println("Delete Requests Succeeded. Return Code:" + returnCode);
}

}

在将整个arraylist传递给方法时，我所面对的问题所在的行：

1	pmc.deleteRequests(serviceURL,delete);

这里，deleteRequests参数可以有(String,String[])。

任何指导/建议都将非常有用。

谢谢和问候，萨梅特