Question

我在jsp中有两个按钮，即Start和Stop。

预期：只有点击一下开始按钮，才会开始计数，按下停止按钮时应停止计数。

（参考代码，当按下停止按钮时，应调用 stop_action（），布尔 stopOperation 设置为true， **迭代应该在start_action（）**中停止。）

实际：只要单击“开始”按钮，就会开始新的计数。即使多次按下“停止按钮”，也无法停止计数。

代码如下：

在faces-config.xml中， FunctionExit（class，abcwar.FunctionExit）有请求范围。

和类FunctionExit是：

package abcwar;

import com.sun.rave.web.ui.appbase.AbstractPageBean;
import javax.faces.FacesException;

public class FunctionExit extends AbstractPageBean {

    private boolean stopOperation = false;

    private void _init() throws Exception {
    }

    public FunctionExit() {
    }

    @Override
    public void init() {
        try {
            _init();
        } catch (Exception e) {
            log("FunctionExit Initialization Failure", e);
            throw e instanceof FacesException ? (FacesException) e : new FacesException(e);
        }

    @Override
    public void preprocess() {
    }

    @Override
    public void prerender() {
    }

    @Override
    public void destroy() {
    }

    public String stop_action() {
        setStopOperation(true);
        System.out.println("getStopOperation() :" + getStopOperation());
        return "true";
    }

    public String start_action() {
        long steps = 0;
        while (!getStopOperation()) {
            steps++;
            System.out.println("Step Count :" + steps + ", getStopOperation() :" + getStopOperation());
        }
        return null;
    }

    public boolean getStopOperation() {
        return stopOperation;
    }


    public void setStopOperation(boolean stopOperation) {
        this.stopOperation = stopOperation;
    }
}

Answer 1

在
（i）在Session Scoped Class，SessionBean1中定义函数start_action（），stop_action（）和类变量boolean stopOperation （ii）制作停止按钮的禁用属性=！启动按钮的禁用属性

预期的行为已经实现。

代码如下：

package abcwar;

import com.sun.rave.web.ui.appbase.AbstractSessionBean;
import javax.faces.FacesException;

public class SessionBean1 extends AbstractSessionBean {
    private boolean stopOperation = false;
    private long steps = 0;

    private void _init() throws Exception {
    }

    public SessionBean1() {
    }

    @Override
    public void init() {

        try {
            _init();
        } catch (Exception e) {
            log("SessionBean1 Initialization Failure", e);
            throw e instanceof FacesException ? (FacesException) e : new FacesException(e);
        }


    }

    @Override
    public void passivate() {
    }


    @Override
    public void activate() {
    }

    @Override
    public void destroy() {
    }

    protected ApplicationBean1 getApplicationBean1() {
        return (ApplicationBean1) getBean("ApplicationBean1");
    }

    public boolean isStopOperation() {
        return stopOperation;
    }

    public void setStopOperation(boolean stopOperation) {
        this.stopOperation = stopOperation;
    }

    public String stop_action() {
        setStopOperation(true);
        System.out.println("getStopOperation() :" + isStopOperation());
        return null;
    }

    public String start_action() {
        if (steps <= 0) {
            steps = 0;
        }
        setStopOperation(false);
        while (!isStopOperation()) {
            steps++;
            System.out.println("Step Count :" + steps + ", getStopOperation() :" + isStopOperation());
        }
        return null;
    }
}

在java中干扰另一个函数的一个函数

1 个答案: