Groovy Swing buider fileChooser

Question

我试图使用groovy swing builder的fileChooser而没有运气。 当我从groovy网站复制以下示例时：

def openExcelDialog  = SwingBuilder.fileChooser(dialogTitle:"Choose an excel file", 
                               id:"openExcelDialog", fileSelectionMode :         JFileChooser.FILES_ONLY, 
                               //the file filter must show also directories, in order to be able to look into them
                               fileFilter: [getDescription: {-> "*.xls"}, accept:{file-> file ==~ /.*?\.xls/ || file.isDirectory() }] as FileFilter) {

}

但是我收到了一条错误消息：

groovy.lang.MissingMethodException: No signature of method: static groovy.swing.SwingBuilder.fileChooser() is applicable for argument types: (java.util.LinkedHashMap, ConsoleScript19$_run_closure1) values

Answer 1

你不能在SwingBuilder之外使用fileChooser。相反，你需要使用普通的非swingBuilder JFileChooser。这是一个完整的工作示例：

import javax.swing.filechooser.FileFilter
import javax.swing.JFileChooser

def openExcelDialog = new JFileChooser(
                            dialogTitle: "Choose an excel file",
                            fileSelectionMode: JFileChooser.FILES_ONLY, 
                            //the file filter must show also directories, in order to be able to look into them
                            fileFilter: [getDescription: {-> "*.xls"}, accept:{file-> file ==~ /.*?\.xls/ || file.isDirectory() }] as FileFilter)

openExcelDialog.showOpenDialog()

请注意，new JFileChooser只是以右括号结束 - 没有尾随闭包。

Answer 2

OverZealous'解决方案因NPE而失败。

Exception in thread "Basic L&F File Loading Thread" java.lang.NullPointerException
    at java.util.regex.Matcher.getTextLength(Unknown Source)
    at java.util.regex.Matcher.reset(Unknown Source)
    at java.util.regex.Matcher.<init>(Unknown Source)
    at java.util.regex.Pattern.matcher(Unknown Source)
    at org.codehaus.groovy.runtime.InvokerHelper.matchRegex(InvokerHelper.java:335)
    at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.matchRegex(ScriptBytecodeAdapter.java:722)
    at ExcelChooser2$_run_closure2.doCall(ExcelChooser2.groovy:13)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
    at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:233)
    at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:272)
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:884)
    at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:39)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116)
    at FileFilter_groovyProxy.accept(Script1.groovy:7)
    at javax.swing.JFileChooser.accept(Unknown Source)
    at javax.swing.plaf.basic.BasicDirectoryModel$LoadFilesThread.run0(Unknown Source)
    at javax.swing.plaf.basic.BasicDirectoryModel$LoadFilesThread.run(Unknown Source)

<强>解决方案：

OLD：fileFilter: [getDescription: {-> "*.xls"}, accept:{file -> file ==~ /.*?\.xls/ || file.isDirectory() }] as FileFilter

新：fileFilter: [getDescription: {-> "*.xls"}, accept:{file -> file.toString() ==~ /.*?\.xls/ || file.isDirectory() }] as FileFilter

[Win7（x64）Groovy版本：1.8.3 JVM：1.6.0_29）]

Answer 3

我认为你需要先创建一个SwingBuilder对象。这对我有用：

def swing = new SwingBuilder()
def dialog = swing.fileChooser(dialogTitle: "Open A File")
if (dialog.showOpenDialog() == JFileChooser.APPROVE_OPTION) {
    println dialog.selectedFile
}

查看here以获取完整的属性列表。