blocks|key|1153962|text|你可能已经解决了这个问题，但对于其他问题--你可以按照Adam+Crume的建议，使用Windows+XP和更高版本上已经编写的脚本battstat.bat来解决。以下是结果函数的示例：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1153963|private+Boolean+runsOnBattery()+{
++++try+{
++++++++Process+proc+=+Runtime.getRuntime().exec("cmd.exe+/c+battstat.bat");

++++++++BufferedReader+stdInput+=+new+BufferedReader(
++++++++++++new+InputStreamReader(proc.getInputStream()));

++++++++String+s;
++++++++while+((s+=+stdInput.readLine())+!=+null)+{
++++++++++++if+(s.contains("mains+power"))+{
++++++++++++++++return+false;
++++++++++++}+else+if+(s.contains("Discharging"))+{
++++++++++++++++return+true;
++++++++++++}
++++++++}
++++}+catch+(IOException+ex)+{
++++++++Logger.getLogger(Main.class.getName()).log(Level.SEVERE,+null,+ex);
++++}

++++return+false;
}|code-block|syntax|javascript|1153964|或者，您可以简化脚本以直接返回True/False或任何合适的值。|1153965|entityMap|0|LINK|mutability|MUTABLE|url|http://www.robvanderwoude.com/files/battstat_xp.txt^0|1U|C|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@$A|T|B|U|1|V]]|C|$]]|$1|D|3|E|5|F|7|W|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|X|8|@]|9|@]|C|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|C|$]]]|L|$M|$5|N|O|P|C|$Q|R]]]]

You have probably already solved this problem but for the others - you can do it the way Adam Crume suggests, using an already written script <a href="http://www.robvanderwoude.com/files/battstat_xp.txt">battstat.bat</a> for Windows XP and higher.
Here is an example of the resulting function:

<pre><code>private Boolean runsOnBattery() {
 try {
 Process proc = Runtime.getRuntime().exec("cmd.exe /c battstat.bat");

 BufferedReader stdInput = new BufferedReader(
 new InputStreamReader(proc.getInputStream()));

 String s;
 while ((s = stdInput.readLine()) != null) {
 if (s.contains("mains power")) {
 return false;
 } else if (s.contains("Discharging")) {
 return true;
 }
 }
 } catch (IOException ex) {
 Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
 }

 return false;
}
</code></pre>

Or you can simplify the script to return directly True/False or whatever fits.

blocks|key|4370915|text|在linux上，您可以使用/proc/acpi/+can+/|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4370916|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

On linux, you can use /proc/acpi/battery/

blocks|key|140077|text|在谷歌上快速搜索一下，就会找到一个java+acpi+library+on+sourceforge。但自2004年以来就没有更新过。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|140078|entityMap|0|LINK|mutability|MUTABLE|url|http://sourceforge.net/projects/jacpi/^0|H|W|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

A quick google search turns up a <a href="http://sourceforge.net/projects/jacpi/" rel="nofollow noreferrer">java acpi library on sourceforge</a>. Hasn't been updated since 2004 though.

blocks|key|140085|text|处理这种情况的一种快速而棘手的方法是调用本机程序(通过Runtime.exec(...))并解析输出。在Windows上，本机程序可能是使用WMI的VBScript。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|140086|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

A quick and dirty way to handle this is call a native program (via Runtime.exec(...)) and parse the output. On Windows, the native program might be VBScript that uses WMI.

blocks|key|1439834|text|下面是使用SYSTEM_POWER_STATUS结构在Windows上运行的代码。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1439835|请注意，您需要将jna添加到您的(Maven)依赖项中，这样才能正常工作。|1439836|import+java.util.ArrayList;
import+java.util.List;

import+com.sun.jna.Native;
import+com.sun.jna.Structure;
import+com.sun.jna.win32.StdCallLibrary;

public+interface+Kernel32+extends+StdCallLibrary
{
++++public+Kernel32+INSTANCE+=+(Kernel32)+Native.loadLibrary("Kernel32",
++++++++++++Kernel32.class);

++++public+class+SYSTEM_POWER_STATUS+extends+Structure
++++{
++++++++public+byte+ACLineStatus;

++++++++@Override
++++++++protected+List<String>+getFieldOrder()
++++++++{
++++++++++++ArrayList<String>+fields+=+new+ArrayList<String>();
++++++++++++fields.add("ACLineStatus");

++++++++++++return+fields;
++++++++}

++++++++public+boolean+isPlugged()
++++++++{
++++++++++++return+ACLineStatus+==+1;
++++++++}
++++}

++++public+int+GetSystemPowerStatus(SYSTEM_POWER_STATUS+result);
}|code-block|syntax|javascript|1439837|在你的代码中，像这样调用它：|1439838|Kernel32.SYSTEM_POWER_STATUS+batteryStatus+=+new+Kernel32.SYSTEM_POWER_STATUS();
Kernel32.INSTANCE.GetSystemPowerStatus(batteryStatus);

System.out.println(batteryStatus.isPlugged());|1439839|结果：|1439840|true+if+charger+is+plugged+in+false+otherwise|1439841|这是从BalsusC's+answer派生出来的。|1439842|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/aa373232%2528VS.85%2529.aspx|1|https://github.com/twall/jna|2|https://stackoverflow.com/questions/3434719/how-to-get-the-remaining-battery-life-in-a-windows-system^0|5|J|5|J|0|0|8|3|8|3|1|0|0|0|0|0|0|3|G|2|0^^$0|@$1|2|3|4|5|6|7|18|8|@$9|19|A|1A|B|C]]|D|@$9|1B|A|1C|1|1D]]|E|$]]|$1|F|3|G|5|6|7|1E|8|@$9|1F|A|1G|B|C]]|D|@$9|1H|A|1I|1|1J]]|E|$]]|$1|H|3|I|5|J|7|1K|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|1L|8|@]|D|@]|E|$]]|$1|O|3|P|5|J|7|1M|8|@]|D|@]|E|$K|L]]|$1|Q|3|R|5|6|7|1N|8|@]|D|@]|E|$]]|$1|S|3|T|5|J|7|1O|8|@]|D|@]|E|$K|L]]|$1|U|3|V|5|6|7|1P|8|@]|D|@$9|1Q|A|1R|1|1S]]|E|$]]|$1|W|3|-4|5|6|7|1T|8|@]|D|@]|E|$]]]|X|$Y|$5|Z|10|11|E|$12|13]]|14|$5|Z|10|11|E|$12|15]]|16|$5|Z|10|11|E|$12|17]]]]

Here's code that works on Windows by using the <a href="http://msdn.microsoft.com/en-us/library/aa373232%28VS.85%29.aspx" rel="nofollow noreferrer"><code>SYSTEM_POWER_STATUS</code></a> structure.

Note that you need to add <a href="https://github.com/twall/jna" rel="nofollow noreferrer"><code>jna</code></a> to your (Maven) dependencies for this to work.

<pre><code>import java.util.ArrayList;
import java.util.List;

import com.sun.jna.Native;
import com.sun.jna.Structure;
import com.sun.jna.win32.StdCallLibrary;

public interface Kernel32 extends StdCallLibrary
{
 public Kernel32 INSTANCE = (Kernel32) Native.loadLibrary("Kernel32",
 Kernel32.class);

 public class SYSTEM_POWER_STATUS extends Structure
 {
 public byte ACLineStatus;

 @Override
 protected List&lt;String&gt; getFieldOrder()
 {
 ArrayList&lt;String&gt; fields = new ArrayList&lt;String&gt;();
 fields.add("ACLineStatus");

 return fields;
 }

 public boolean isPlugged()
 {
 return ACLineStatus == 1;
 }
 }

 public int GetSystemPowerStatus(SYSTEM_POWER_STATUS result);
}
</code></pre>

In your code call it like this:

<pre><code>Kernel32.SYSTEM_POWER_STATUS batteryStatus = new Kernel32.SYSTEM_POWER_STATUS();
Kernel32.INSTANCE.GetSystemPowerStatus(batteryStatus);

System.out.println(batteryStatus.isPlugged());
</code></pre>

Result:

<pre><code>true if charger is plugged in false otherwise
</code></pre>

This has been derived off <a href="https://stackoverflow.com/questions/3434719/how-to-get-the-remaining-battery-life-in-a-windows-system">BalsusC's answer</a>.

I am developing an application which monitors the presence of the power supply of the laptop. If there is a power cut or restoration it will intimate me over email. It will also application monitoring and controlling over email (Basically to control my laptop from my office over email). I am done with email interfacing but I have no idea on how to monitor the power supply / battery supply from java.

If any can give some pointer on this it will be of great help.

Thanks in advance ....

Monitoring battery or power supply of laptop from java

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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