如何在不提示的情况下使用com4j API保存excel工作簿

我正在尝试保存已自动修改的工作簿。这是一个例子:
import excel.*;
import com4j.Variant;
import static com4j.Variant.MISSING; 


public class ExcelDemo {
    public static void main(String[] args) {
    _Application app = excel.ClassFactory.createApplication();
    app.visible(0,false);

    //Variant readOnly = new Variant(Variant.Type.VT_BOOL);
    //readOnly.set(0);
    //Variant ignoreReadOnly = new Variant(Variant.Type.VT_BOOL);
    //ignoreReadOnly.set(1);
    //Variant saveBeforeExit = new Variant(Variant.Type.VT_BOOL);
    //saveBeforeExit.set(1);

    app.workbooks().open(
        "C:/dev/test.xlsx",
        MISSING, 
        MISSING, 
        MISSING, 
        MISSING,    
        MISSING,    
        MISSING,    
        MISSING, 
        MISSING,    
        MISSING,    
        MISSING,    
        MISSING, 
        MISSING,    
        MISSING,    
        MISSING,    
        0);
    app.calculate(0);
    app.save(MISSING,0);
    app.workbooks().close(0);
    //app.workbooks().close(saveBeforeExit,MISSING,MISSING);
}
} 上面的代码是从一个ant文件运行并产生以下错误:
run:
 [java] Exception in thread "main" com4j.ComException: 800a03ec (Unknown error) : The file could not be accessed. Try one of the following:
 [java]
 [java] ò Make sure the specified folder exists.
 [java] ò Make sure the folder that contains the file is not read-only.
 [java] ò Make sure the file name does not contain any of the following characters:  <  >  ?  [  ]  :  | or  *
 [java] ò Make sure the file/path name doesn't contain more than 218 characters. : .invoke.cpp:460
 [java]     at com4j.Wrapper.invoke(Wrapper.java:122)
 [java]     at $Proxy5.save(Unknown Source)
 [java]     at ExcelDemo.main(ExcelDemo.java:36)
 [java] Caused by: com4j.ComException: 800a03ec (Unknown error) : The file could not be accessed. Try one of the following:
 [java]
 [java] ò Make sure the specified folder exists.
 [java] ò Make sure the folder that contains the file is not read-only.
 [java] ò Make sure the file name does not contain any of the following characters:  <  >  ?  [  ]  :  | or  *
 [java] ò Make sure the file/path name doesn't contain more than 218 characters. : .invoke.cpp:460
 [java]     at com4j.Native.invoke(Native Method)
 [java]     at com4j.StandardComMethod.invoke(StandardComMethod.java:95)
 [java]     at com4j.Wrapper$InvocationThunk.call(Wrapper.java:258)
 [java]     at com4j.Task.invoke(Task.java:44)
 [java]     at com4j.ComThread.run0(ComThread.java:149)
 [java]     at com4j.ComThread.run(ComThread.java:125)
 [java] Java Result: 1
我尝试了以下的事情,没有一个成功: 将readOnly参数设置为false 将ignoreReadOnly参数设置为true 同时做1和2 将saveBeforeExit对象传递给save方法 有没有提示保存工作簿的方法?请注意,上面的代码会打开文件,并计算公式而不会出现任何错误。 谢谢     
已邀请:
好的,这是解决方案:
import excel.*;
import com4j.Variant;
import static com4j.Variant.MISSING; 


public class ExcelDemo {
    public static void main(String[] args) {
    _Application app = excel.ClassFactory.createApplication();
    app.visible(0,false);

 Variant saveBeforeExit = new Variant(Variant.Type.VT_BOOL);
 saveBeforeExit.set(1);

 _Workbook wb = app.workbooks().open(
    "C:/dev/test.xlsx",
    MISSING, //0
    MISSING, //false
    MISSING, //5
    MISSING, //"" 
    MISSING, //"" 
    MISSING, //true 
    MISSING, //true 
    MISSING, //obj 
    MISSING, //false 
    MISSING, //false 
    MISSING, //obj
    MISSING, 
    MISSING, 
    MISSING, 
 0);
 app.calculate(0);
 wb.close(saveBeforeExit, MISSING,MISSING, 0);
 app.quit();
}
}     

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