用JAVA实现一个ASN数据结构
时间: 2023-03-05 18:33:05 浏览: 165
ASN(Abstract Syntax Notation)是一种用于描述数据结构的标准格式,通常用于网络协议中。在Java中,可以使用Java ASN.1 API实现ASN数据结构。以下是一个简单的示例:
```java
import java.io.IOException;
import java.math.BigInteger;
import java.util.Arrays;
import org.bn.CoderFactory;
import org.bn.IEncoder;
import org.bn.types.BitString;
public class ASNExample {
public static void main(String[] args) throws IOException {
// 定义一个Sequence类型的ASN数据结构
MySequence mySequence = new MySequence();
mySequence.setMyInteger(new BigInteger("123456789"));
mySequence.setMyBoolean(true);
mySequence.setMyOctetString(new byte[] { 0x01, 0x02, 0x03 });
mySequence.setMyBitString(new BitString(new byte[] { 0x01, 0x02, 0x03 }, 2));
mySequence.setMySequenceOf(Arrays.asList(new BigInteger[] { new BigInteger("1"), new BigInteger("2"), new BigInteger("3") }));
// 使用ASN.1编码器将ASN数据结构转换为字节数组
IEncoder encoder = CoderFactory.getInstance().newEncoder("BER");
byte[] encoded = encoder.encode(mySequence);
// 打印字节数组
for (byte b : encoded) {
System.out.printf("%02x ", b);
}
System.out.println();
}
// 定义一个Sequence类型的ASN数据结构
public static class MySequence {
private BigInteger myInteger;
private boolean myBoolean;
private byte[] myOctetString;
private BitString myBitString;
private java.util.List<BigInteger> mySequenceOf;
public BigInteger getMyInteger() {
return myInteger;
}
public void setMyInteger(BigInteger value) {
this.myInteger = value;
}
public boolean isMyBoolean() {
return myBoolean;
}
public void setMyBoolean(boolean value) {
this.myBoolean = value;
}
public byte[] getMyOctetString() {
return myOctetString;
}
public void setMyOctetString(byte[] value) {
this.myOctetString = value;
}
public BitString getMyBitString() {
return myBitString;
}
public void setMyBitString(BitString value) {
this.myBitString = value;
}
public java.util.List<BigInteger> getMySequenceOf() {
return mySequenceOf;
}
public void setMySequenceOf(java.util.List<BigInteger> value) {
this.mySequenceOf = value;
}
}
}
```
这个示例定义了一个MySequence类,表示一个包含多个不同类型的成员的Sequence类型的ASN数据结构。该示例使用了Java ASN.1 API中的Encoder类,将MySequence对象编码为字节数组,并打印结果。
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