访问被拒绝(“java.io.FilePermission"“执行") [英] access denied ("java.io.FilePermission" "execute")

问题描述

我是初学者，这是我写的第一个小程序

我想用小程序运行 exe 应用程序

java代码

 包小程序示例；导入 java.io.*;导入 java.awt.*;导入 java.applet.Applet;公共类欢迎扩展小程序{公共无效初始化(){String execommand = "C:\\windows\\notepad.exe" ;尝试 {Process proc = Runtime.getRuntime().exec(execommand);}捕捉(IOException ieo){System.out.println("问题开始" + execommand) ;}}}

java.policy.applet

grant {权限 java.security.AllPermission;};

我在 Eclipse 中运行此代码 Run As->Java Applet 工作并打开 NotePade但是当 Export->Jar File(with .classPath,.project,java.policy.applet)并在

中使用

HTML

解决方案
我假设您只是想练习如何编写小程序.出于开发目的，您可以创建一个密钥库，然后使用它对您的 applet.jar 进行签名.
前往:开始菜单 > 执行 > cmd.exe
输入:
cd/keytool -genkey -dname "cn=CN, ou=OU, o=O, l=L, st=ST, c=C" -alias mykey -keypass mypass -keystore mystore -validity 3650 -storepass mypassjarsigner -keystore c:\mystore -storepass mypass C:\path\to\applet.jar mykey
那么:
刷新您的 HTML 页面.
I am beginner.it is first applet that i writing

i want run exe application with applet

java code
 package appletexample;

import java.io.*;
import java.awt.*;
import java.applet.Applet;

public class Welcome extends Applet {

    public void init() {
        String execommand = "C:\\windows\\notepad.exe" ;
        try {
            Process proc =  Runtime.getRuntime().exec(execommand) ;
        }
        catch(IOException ieo) {
            System.out.println("Problem starting " + execommand) ;
        }
    }
} 
java.policy.applet
grant {
  permission java.security.AllPermission;
};
i run this code in eclipse Run As->Java Applet worked and opened NotePade
but when Export->Jar File(with .classPath,.project,java.policy.applet)
and use in 

Html
<applet archive="test.jar" code="appletexample/Welcome.class"  width=550 height=300>
in firefox say error access denied ("java.io.FilePermission" "execute")?
how can fix this problem?


download my java and Html code
解决方案
I assume that you just want to practice how to write a applet.
For development purpose,  you can create a keystore and then use it to sign your applet.jar.

Go: Start Menu > Execute > cmd.exe

Input: 
cd /
keytool -genkey -dname "cn=CN, ou=OU, o=O, l=L, st=ST, c=C" -alias mykey -keypass mypass -keystore mystore -validity 3650 -storepass mypass
jarsigner -keystore c:\mystore -storepass mypass C:\path\to\applet.jar mykey
Then:

Refresh your HTML page.

                        
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