Access restriction錯誤的處理

1、開發環境

import java.math.BigInteger;
import java.security.KeyFactory;
import java.security.PublicKey;
import java.security.spec.RSAPublicKeySpec;

import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;

import com.sun.org.apache.xml.internal.security.utils.Base64;

/*
 * This Java source file was generated by the Gradle 'init' task.
 */
public class Library {
	public boolean someLibraryMethod() {
		return true;
	}

	static SecretKeySpec sk = new SecretKeySpec("propsoft".getBytes(), "DES");

	public static String dencry(String password) {
		try {
			byte[] dec = new sun.misc.BASE64Decoder().decodeBuffer(password);
			Cipher c1 = Cipher.getInstance("DES");
			c1.init(Cipher.DECRYPT_MODE, sk);
			byte[] cipherByte = c1.doFinal(dec);
			return new String(cipherByte, "utf-8");
		} catch (Exception e) {

		}
		return null;
	}

	public static String encryptByPublicKey(String str, String module, String exponentString) {
		try {
			byte[] modulusBytes = com.sun.org.apache.xml.internal.security.utils.Base64.decode(module.getBytes("UTF-8"));
			byte[] exponentBytes = com.sun.org.apache.xml.internal.security.utils.Base64.decode(exponentString.getBytes("UTF-8"));
			BigInteger modulus = new BigInteger(1, modulusBytes);
			BigInteger exponent = new BigInteger(1, exponentBytes);
			RSAPublicKeySpec rsaPubKey = new RSAPublicKeySpec(modulus, exponent);
			KeyFactory fact = KeyFactory.getInstance("RSA");
			PublicKey publicKey = fact.generatePublic(rsaPubKey);
			Cipher cipher = Cipher.getInstance("RSA");
			cipher.init(Cipher.ENCRYPT_MODE, publicKey);
			byte[] cipherData = cipher.doFinal(str.getBytes("UTF-8"));
			return Base64.encode(cipherData);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return null;

	}
}

在開發工具，如eclipse中調用時，報錯

Access restriction: The type 'Base64' is not API (restriction on required library 'D:\Program Files\jdk1.8.0_72\jre\lib\rt.jar')

解決方法：

方法一、項目右鍵->Build Path ->Libraries -> 加載默認JDK便可

方法二、將Error 改成 Warning

 

2、編譯環境

一、使用gradle編譯，build會報錯

D:\develop\workspace\demo\src\main\java\Library.java:9: 錯誤: 程序包com.sun.org.apache.xml.internal.security.utils不存在
import com.sun.org.apache.xml.internal.security.utils.Base64;
                                                     ^
D:\develop\workspace\demo\src\main\java\Library.java:23: 警告: BASE64Decoder是內部專用 API, 可能會在將來發行版中刪除
                        byte[] dec = new sun.misc.BASE64Decoder().decodeBuffer(password);
                                                 ^
D:\develop\workspace\demo\src\main\java\Library.java:36: 錯誤: 找不到符號
                        byte[] modulusBytes = Base64.decode(module.getBytes("UTF-8"));
                                              ^
  符號:   變量 Base64
  位置: 類 Library
D:\develop\workspace\demo\src\main\java\Library.java:37: 錯誤: 找不到符號
                        byte[] exponentBytes = Base64.decode(exponentString.getBytes("UTF-8"));
                                               ^

解決方法：

在build.gradle中添加

import org.apache.tools.ant.taskdefs.condition.Os
tasks.withType(JavaCompile) {    
    def sep = ':'
    if (Os.isFamily(Os.FAMILY_WINDOWS)) {
      sep = ';'
    }
    
    options.bootClasspath = "$System.env.JAVA_HOME/jre/lib/rt.jar"+sep+"$System.env.JAVA_HOME/jre/lib/jce.jar"
}

 

二、在maven中報錯

解決方法：

pom.xml中添加編譯參數

<build>
		<plugins>
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-compiler-plugin</artifactId>
				<version>2.3.2</version>
				<configuration>
					<source>1.7</source>
					<target>1.7</target>
					<encoding>${project.build.sourceEncoding}</encoding>
					<compilerArguments>
						<verbose />
						<bootclasspath>${java.home}/lib/rt.jar;${java.home}/lib/jce.jar</bootclasspath>
					</compilerArguments>
				</configuration>
			</plugin>
		</plugins>
	</build>