首先，我有這個(gè)工作代碼：import java.io.FileWriter;import java.io.IOException;public class TestPolicy {    public static void main(String[] args) {        FileWriter writer;        try {            writer = new FileWriter("testPolicy.txt");            writer.write("hello1");            writer.close();        } catch (IOException e) {            e.printStackTrace();        }    }}它運(yùn)行良好D:\Documents\myproject\mynet\mytest\java\security\target\classes>java -classpath . TestPolic它將生成一個(gè)名為 [testPolicy.txt] 的新文件然后我添加了一個(gè) ../../src/myPolicy.txt 內(nèi)容：grant codeBase "file:D:\Documents\myproject\mynet\mytest\java\security\target\classes*" {    permission java.io.FilePermission "testPolicy.txt", "read,write";};我預(yù)計(jì)，只要我指定“讀、寫(xiě)”權(quán)限，它也應(yīng)該運(yùn)行良好。但它運(yùn)行異常：D:\Documents\myproject\mynet\mytest\java\security\target\classes>java -classpath . -Djava.security.manager -Djava.security.policy=../../src/myPolicy.txt TestPolicyException in thread "main" java.security.AccessControlException: access denied ("java.io.FilePermission" "testPolicy.txt" "write")        at java.security.AccessControlContext.checkPermission(Unknown Source)        at java.security.AccessController.checkPermission(Unknown Source)        at java.lang.SecurityManager.checkPermission(Unknown Source)        at java.lang.SecurityManager.checkWrite(Unknown Source)        at java.io.FileOutputStream.<init>(Unknown Source)        at java.io.FileOutputStream.<init>(Unknown Source)        at java.io.FileWriter.<init>(Unknown Source)        at TestPolicy.main(TestPolicy.java:8)我哪里出錯(cuò)了，如何解決？非常感謝。