我正在使用Scala，但我找不到能从Processname中获取PrcoessID的东西。无论是Java，Scala还是Winapi。
目前我正在使用FindWindowA和GetWindowThreadProcessId，但我更喜欢能给我一个阵列的东西
val process: Array[Int] = GetProcessIdFromExeName("Notepad")
因此，如果我有10个记事本实例，我可以使用process(0-9)
我知道.NET中存在这样的东西，但是在WINAPI或Java / Scala中是否存在类似内容？
答案 0 :(得分：1)
最简单的方法是运行tasklist并解析输出。请参阅此资源以供参考：
您也可以使用WMI。编写执行WMI查询并打印输出的JScript或VBScript非常简单，因此您可以从java或Scala进程运行它并解析输出。 WMI提供的选项多于tasklist。
如果您选择WMI，您也可以使用现有的java-to-com库之一来调用它，例如JaWin，Jintegra，JInterop。
答案 1 :(得分：0)
public class TaskList {
public static final String PROCESS_NAME = "tasklist";
private static final String LINE_FORMAT = "%-25s %14s %-16s %14s %15s\n";
public static Process getTaskListProcess() throws IOException {
return Runtime.getRuntime().exec(PROCESS_NAME);
}
List<TaskListEntry> taskListEntries;
boolean hasRun;
public TaskList() {
taskListEntries = new ArrayList<>();
}
public void run() {
if (hasRun) {
// intentions of running this twice is not clear so throw exception
String err = "TaskList can only be run once";
throw new IllegalStateException(err);
}
try {
Process proc = getProcess();
List<String> lines = Processes.getAllLines(proc);
String[] seperators = lines.get(2).split(" ");
if (seperators.length < 5) {
throw new IllegalStateException("Incorrect number of seperators parsed");
}
// Remove header and separators
lines = lines.subList(4, lines.size() - 1);
for (String line : lines) {
taskListEntries.add(new TaskListEntry(seperators, line));
}
} catch (IOException e) {
String err = "Error resolving process";
throw new IllegalStateException(err, e);
}
}
Process getProcess() throws IOException {
return getTaskListProcess();
}
public List<TaskListEntry> getTaskListEntries() {
return Collections.unmodifiableList(taskListEntries);
}
@Override
public String toString() {
String sep = "============================";
String headers = String.format(LINE_FORMAT, "Image Name", "PID", "Session Name", "Session#", "Mem Usage");
StringBuilder builder = new StringBuilder(headers);
builder.append(sep).append(" ")
.append(sep.substring(17)).append(" ")
.append(sep.substring(9)).append(" ")
.append(sep.substring(17)).append(" ")
.append(sep.substring(13)).append('\n');
for(TaskListEntry entry : getTaskListEntries()) {
builder.append(entry.toString());
}
return builder.toString();
}
public class TaskListEntry {
private TaskListEntry(String[] seperators, String line) {
try {
int start = 0;
int end = start + seperators[0].length() + 1;
this.image = line.substring(start, end).trim();
start = end;
end = start + seperators[1].length() + 1;
this.pid = Integer.parseInt(line.substring(start, end).trim());
start = end;
end = start + seperators[2].length() + 1;
this.sessionName = line.substring(start, end).trim();
start = end;
end = start + seperators[3].length() + 1;
this.sessionNum = Integer.parseInt(line.substring(start, end).trim());
start = end;
end = start + seperators[4].length();
this.memUsage = line.substring(start, end).trim();
} catch (NullPointerException e) {
throw e;
} catch (RuntimeException e) {
String format = "Unable to parse line {%s} with seperator {%s}";
String msg = String.format(format, line, Arrays.toString(seperators));
throw new IllegalArgumentException(msg, e);
}
}
String image;
int pid;
String sessionName;
int sessionNum;
String memUsage;
@Override
public String toString() {
return String.format(LINE_FORMAT, image, pid, sessionName, sessionNum, memUsage);
}
public String getImage() {
return image;
}
public void setImage(String image) {
this.image = image;
}
public int getPid() {
return pid;
}
public void setPid(int pid) {
this.pid = pid;
}
public String getSessionName() {
return sessionName;
}
public void setSessionName(String sessionName) {
this.sessionName = sessionName;
}
public int getSessionNum() {
return sessionNum;
}
public void setSessionNum(int sessionNum) {
this.sessionNum = sessionNum;
}
public String getMemUsage() {
return memUsage;
}
public void setMemUsage(String memUsage) {
this.memUsage = memUsage;
}
}
public static void main(String [] args){
TaskList tasks = new TaskList();
tasks.run();
tasks.getTaskListEntries();
Optional<TaskListEntry> entry = tasks.getTaskListEntries()
.stream()
.filter(p -> p.getImage().equals("notepad++.exe"))
.findFirst();
if(entry.isPresent()) {
logger.info(entry.get());
}
}
}
这是引用的Processes类
public class Processes {
public static BufferedReader getProcessReader(Process p) {
InputStream in = p.getInputStream();
InputStreamReader reader = new InputStreamReader(in);
return new BufferedReader(reader);
}
public static List<String> getAllLines(Process p) {
try (BufferedReader reader = getProcessReader(p)) {
List<String> lines = new ArrayList<>();
String line;
while ((line = reader.readLine()) != null) {
lines.add(line);
}
return lines;
} catch (IOException e) {
String msg = "Reader is not in a readable state";
throw new IllegalStateException(msg, e);
}
}
private Processes() {
// This is a utility method
}
}