Web开发为了java端程序能删除文件的解决办法

Web开发为了java端程序能删除文件，必须在.../jre/lib/security/java.policy文件中添加以下两个中的任何一段代码进去。

注：必须是服务器的本地文件，局域网内的其他机器文件根本不能访问。

一，

grant codeBase "file:/d:/-" {permission java.io.FilePermission "D://*", "read,delete";};

 

 

二，

//created by mepermission java.lang.RuntimePermission "createClassLoader";permission java.io.FilePermission "D://*", "read,delete";permission java.lang.RuntimePermission "getProtectionDomain";

 

 

例：

// Standard extensions get all permissions by default

grant codeBase "file:${{java.ext.dirs}}/*" { permission java.security.AllPermission;};

//一的位置

grant codeBase "file:/d:/-" {permission java.io.FilePermission "D://*", "read,delete";};

// default permissions granted to all domains

grant {  // Allows any thread to stop itself using the java.lang.Thread.stop() // method that takes no argument. // Note that this permission is granted by default only to remain // backwards compatible. // It is strongly recommended that you either remove this permission // from this policy file or further restrict it to code sources // that you specify, because Thread.stop() is potentially unsafe. // See "http://java.sun.com/notes" for more information. permission java.lang.RuntimePermission "stopThread";

 // allows anyone to listen on un-privileged ports permission java.net.SocketPermission "localhost:1024-", "listen";

  //二的位置

 permission java.lang.RuntimePermission "createClassLoader"; permission java.io.FilePermission "D://*", "read,delete"; permission java.lang.RuntimePermission "getProtectionDomain"; // "standard" properies that can be read by anyone

 permission java.util.PropertyPermission "java.version", "read"; permission java.util.PropertyPermission "java.vendor", "read"; permission java.util.PropertyPermission "java.vendor.url", "read"; permission java.util.PropertyPermission "java.class.version", "read"; permission java.util.PropertyPermission "os.name", "read"; permission java.util.PropertyPermission "os.version", "read"; permission java.util.PropertyPermission "os.arch", "read"; permission java.util.PropertyPermission "file.separator", "read"; permission java.util.PropertyPermission "path.separator", "read"; permission java.util.PropertyPermission "line.separator", "read";

 permission java.util.PropertyPermission "java.specification.version", "read"; permission java.util.PropertyPermission "java.specification.vendor", "read"; permission java.util.PropertyPermission "java.specification.name", "read";

 permission java.util.PropertyPermission "java.vm.specification.version", "read"; permission java.util.PropertyPermission "java.vm.specification.vendor", "read"; permission java.util.PropertyPermission "java.vm.specification.name", "read"; permission java.util.PropertyPermission "java.vm.version", "read"; permission java.util.PropertyPermission "java.vm.vendor", "read"; permission java.util.PropertyPermission "java.vm.name", "read"; };