JSP获取CPU使用率、系统内存、虚拟机内存等情况(不用JNI)(2)

    public int getTotalThread() {
        return totalThread;
    }

    public void setTotalThread(int totalThread) {
        this.totalThread = totalThread;
    }

    public long getUsedMemory() {
        return usedMemory;
    }

    public void setUsedMemory(long usedMemory) {
        this.usedMemory = usedMemory;
    }

    public double getCpuRatio() {
        return cpuRatio;
    }

    public void setCpuRatio(double cpuRatio) {
        this.cpuRatio = cpuRatio;
    }
}
接着编写一个获得当前的监控信息的接口，该类的代码如下所示：
package performance;

/**
 * 获取系统信息的业务逻辑类接口.
 */
public interface IMonitorService {
    /**
     * 获得当前的监控对象.
     *
     * @return 返回构造好的监控对象
     * @throws Exception
     */
    public MonitorInfoBean getMonitorInfoBean() throws Exception;
}
该类的实现类MonitorServiceImpl如下所示：
package performance;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.LineNumberReader;
import java.util.StringTokenizer;
import sun.management.ManagementFactory;
import com.sun.management.OperatingSystemMXBean;

/**
 *
 * 获取系统信息的业务逻辑实现类.
 *
 * @author GuoHuang
 */
public class MonitorServiceImpl implements IMonitorService {
    private static final int CPUTIME = 30;
    private static final int PERCENT = 100;
    private static final int FAULTLENGTH = 10;
    private static String linuxVersion = null;

    /**
     * 获得当前的监控对象.
     *
     * @return 返回构造好的监控对象
     * @throws Exception
     * @author GuoHuang
     */
    public MonitorInfoBean getMonitorInfoBean() throws Exception {
        int kb = 1024;
        // 可使用内存
        long totalMemory = Runtime.getRuntime().totalMemory() / kb;