我有一个要求，我需要通过java代码启动和停止postgreSQL服务。我写了下面的代码，但我收到了以下错误：
package frontend.guifx.pginstallation;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.StandardCopyOption;
import common.core.Logger;
import frontend.guifx.util.ConstPG;
public class StartAndStopPostgres {
public static String version = "9.5";
public static void main(String[] args){
try {
System.out.println("Execution starts");
copyPostgreSqlConfFileAndRestartPg();
System.out.println("Execution finished");
} catch (IOException | InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private static void copyPostgreSqlConfFileAndRestartPg() throws IOException, InterruptedException {
// TODO Auto-generated method stub
Path path = Paths.get("data/PGLogs");
//if directory exists?
if (!Files.exists(path)) {
try {
Files.createDirectories(path);
} catch (IOException e) {
//fail to create directory
e.printStackTrace();
}
}
Logger.print(StartAndStopPostgres.class, new String[] { "Copying postgresql.conf file ........" });
Path source = Paths.get("data/postgresql.windows.conf");
String copyConfFileTo = getInstallationPath(version);
copyConfFileTo = copyConfFileTo.substring(0, copyConfFileTo.lastIndexOf("\\"));
Path outputDirectoryPath = Paths.get(copyConfFileTo+File.separator+"data");
Files.copy(source, outputDirectoryPath.resolve(outputDirectoryPath.getFileSystem().getPath("postgresql.conf")), StandardCopyOption.REPLACE_EXISTING);
Logger.print(StartAndStopPostgres.class, new String[] { "Tunning datbase starts........" });
Runtime rt = Runtime.getRuntime();
final File file = new File(System.getProperty("java.io.tmpdir") + File.separator + ConstPG.CREATE_RESTART_PG_BAT_FILE);
PrintWriter writer = new PrintWriter(file, "UTF-8");
writer.println("net stop postgresql-x64-"+version);
writer.println("net start postgresql-x64-"+version);
writer.close();
String executeSqlCommand = file.getAbsolutePath();
Process process = rt.exec(executeSqlCommand);
/*final List<String> commands = new ArrayList<String>();
commands.add("cmd.exe");
commands.add("/C");
commands.add("net stop postgresql-x64-9.5");
commands.add("net start postgresql-x64-9.5");
ProcessBuilder b = new ProcessBuilder(commands);
Process process = b.start();*/
//public static final String PG_RESTART_PG_LOG_FILE = PG_LOGS+"/pgRestartProcess.log";
File createPgRestartProcessFile = new File(ConstPG.PG_RESTART_PG_LOG_FILE);
redirectProcessExecutionOutput(process, createPgRestartProcessFile);
int exitVal = process.waitFor();
Logger.print(StartAndStopPostgres.class, new String[] { "EXIT VALUE after tunning the PostgreSql database :::::::::::::::::::::" + exitVal + " Logs written to file at: " + createPgRestartProcessFile.getAbsolutePath() });
}
public static String getInstallationPath( String version) {
//public static final String PROGRAMME_FILES = "C:\\Program Files\\";
// public static final String PROGRAMME_FILES_X86 = "C:\\Program Files (x86)\\";
// public static final String POSTGRESQL = "PostgreSQL";
// public static final String PSQL_PATH = "\\bin\\psql.exe";
//Const values used below are as above
String psql = findFile(ConstPG.PROGRAMME_FILES, ConstPG.POSTGRESQL + "\\" + version + ConstPG.PSQL_PATH);
if (psql == null) {
psql = findFile(ConstPG.PROGRAMME_FILES_X86, ConstPG.POSTGRESQL + "\\" + version + ConstPG.PSQL_PATH);
}
if(psql != null){
psql = psql.substring(0, psql.lastIndexOf("\\"));
}
return psql;
}
public static String findFile(String directoryName, String fileName) {
File directory = new File(directoryName);
// get all the files from a directory
File[] fList = directory.listFiles();
String absolutePath;
if (fList != null) {
for (File file : fList) {
if (file.isFile()) {
absolutePath = file.getAbsolutePath();
if (absolutePath.contains(fileName))
return (absolutePath);
} else if (file.isDirectory()) {
absolutePath = findFile(file.getAbsolutePath(), fileName);
if (absolutePath != null)
return (absolutePath);
}
}
}
return (null);
}
private static void redirectProcessExecutionOutput(Process process, File processFile) throws IOException {
BufferedReader reader = new BufferedReader(new InputStreamReader(process.getErrorStream()));
String line = null;
FileWriter fw = new FileWriter(processFile.getAbsoluteFile());
BufferedWriter bw = new BufferedWriter(fw);
while ((line = reader.readLine()) != null) {
Logger.print(StartAndStopPostgres.class, new String[] { line });
bw.write(line);
bw.newLine();
}
bw.close();
}
}
以下是我的代码：
public class BroadcastService extends Service {
private static final String TAG = "BroadcastService";
public static final String BROADCAST_ACTION = "com.example.activity.displayevent";
private final Handler handler = new Handler();
Intent intentBS;
int counter = 0;
@Override
public void onCreate() {
super.onCreate();
intentBS = new Intent(BROADCAST_ACTION);
}
@Override
public void onStart(Intent intentBS, int startId) {
handler.removeCallbacks(sendUpdatesToUI);
handler.postDelayed(sendUpdatesToUI, 1000); // 1 second
}
private Runnable sendUpdatesToUI = new Runnable() {
public void run() {
getShiftCode();
handler.postDelayed(this, 10000); // 10 seconds
}
};
private void getShiftCode() {
List<Header> headers = new ArrayList<Header>();
headers.add(new BasicHeader("Accept", "application/json"));
EmployeeRestClient.get(BroadcastService.this, "RestExample/shiftcode",
headers.toArray(new Header[headers.size()]),null,
new JsonHttpResponseHandler() {
@Override
public void onSuccess(int statusCode, Header[] headers, JSONArray response) {
ArrayList<String> scArray = new ArrayList<String>();
for (int i = 0; i < response.length(); i++) {
try {
String Sc_array = c.getString("shift_Code");
scArray.add(Sc_array);
} catch (JSONException e) {
e.printStackTrace();
}
}
shift_Code1= scArray.get(0);
intentBS.putExtra("shift_Code1", shift_Code1);
getEmployees();
sendBroadcast(intentBS);
}
});
}
private void getEmployees() {
List<Header> headers = new ArrayList<Header>();
headers.add(new BasicHeader("Accept", "application/json"));
EmployeeRestClient.get(BroadcastService.this, "RestExample/employee",
headers.toArray(new Header[headers.size()]),null,
new JsonHttpResponseHandler() {
@Override
public void onSuccess(int statusCode, Header[] headers, JSONArray response) {
ArrayList<String> employeeArray1 = new ArrayList<String>();
ArrayList<String> employeeArray2 = new ArrayList<String>();
for (int i = 0; i < response.length(); i++) {
try {
String First_NameArray = c.getString("first_Name");
String Second_NameArray = c.getString("second_name");
employeeArray1.add(First_NameArray );
employeeArray2.add(Second_NameArray );
} catch (JSONException e) {
e.printStackTrace();
}
}
intentBS.putExtra("employee_Array1", employeeArray1);
intentBS.putExtra("employee_Array2", employeeArray2);
}
});
}
如果我以管理员身份开始我的日食，那么这很好用。此外，如果我在命令提示符下运行启动和停止命令（以管理员身份打开，即右键单击命令提示符图标并单击“以管理员身份运行”），则它们会成功执行。但是如果我在正常命令提示符下运行命令（不是以管理员身份打开），那么我也会遇到相同的错误。
请告知是否有任何解决方案或任何方法来解决此问题。
答案 0 :(得分：0)
在java中，有一个以管理员身份运行Windows cmd的选项
使用以下代码替换您的代码“commands.add("cmd.exe");”并尝试
commands.add("runas /profile /user:ADMINUSERNAME \"cmd.exe");