jdk1.8中使用aspectjweaver报错 Invalid byte tag in constant pool 18

背景

（1）jdk 1.8

（2）aspectjweaver 1.6.10

<dependency><groupId>org.aspectj</groupId><artifactId>aspectjweaver</artifactId><version>1.6.10</version>
</dependency>

（3）在方法中使用jdk1.8新特性lambda表达式后，执行方法报错，报错如下：

org.aspectj.apache.bcel.classfile.ClassFormatException: Invalid byte tag in constant pool: 18
at org.aspectj.apache.bcel.classfile.ClassParser.readConstantPool(ClassParser.java:192)
at org.aspectj.apache.bcel.classfile.ClassParser.parse(ClassParser.java:131)

分析

查看源码发现 1.6.10版本的aspectjweaver，读取class文件中的常量池出错，

不支持读取class文件常量池中的数据项：CONSTANT_InvokeDynamic_info（类型标志：18）

 static final Constant readConstant(DataInputStream dis) throws IOException, ClassFormatException {byte b = dis.readByte();switch(b) {case 1:return new ConstantUtf8(dis);case 2:default:throw new ClassFormatException("Invalid byte tag in constant pool: " + b);case 3:return new ConstantInteger(dis);case 4:return new ConstantFloat(dis);case 5:return new ConstantLong(dis);case 6:return new ConstantDouble(dis);case 7:return new ConstantClass(dis);case 8:return new ConstantString(dis);case 9:return new ConstantFieldref(dis);case 10:return new ConstantMethodref(dis);case 11:return new ConstantInterfaceMethodref(dis);case 12:return new ConstantNameAndType(dis);}}

解决办法

升级aspectjweaver，使其支持读取新的数据项：CONSTANT_InvokeDynamic_info（类型标志：18）。比如升级到 1.8.9

<dependency><groupId>org.aspectj</groupId><artifactId>aspectjweaver</artifactId><version>1.8.9</version>
</dependency>

public abstract class Constant implements Cloneable, Node {protected byte tag;Constant(byte tag) {this.tag = tag;}public final byte getTag() {return this.tag;}public String toString() {return Constants.CONSTANT_NAMES[this.tag] + "[" + this.tag + "]";}public abstract void accept(ClassVisitor var1);public abstract void dump(DataOutputStream var1) throws IOException;public abstract Object getValue();public Constant copy() {try {return (Constant)super.clone();} catch (CloneNotSupportedException var2) {return null;}}public Object clone() throws CloneNotSupportedException {return super.clone();}static final Constant readConstant(DataInputStream dis) throws IOException, ClassFormatException {byte b = dis.readByte();switch(b) {case 1:return new ConstantUtf8(dis);case 2:case 13:case 14:case 17:default:throw new ClassFormatException("Invalid byte tag in constant pool: " + b);case 3:return new ConstantInteger(dis);case 4:return new ConstantFloat(dis);case 5:return new ConstantLong(dis);case 6:return new ConstantDouble(dis);case 7:return new ConstantClass(dis);case 8:return new ConstantString(dis);case 9:return new ConstantFieldref(dis);case 10:return new ConstantMethodref(dis);case 11:return new ConstantInterfaceMethodref(dis);case 12:return new ConstantNameAndType(dis);case 15:return new ConstantMethodHandle(dis);case 16:return new ConstantMethodType(dis);case 18:return new ConstantInvokeDynamic(dis);}}

参考文献

https://blog.csdn.net/chen051318/article/details/68927464

https://zhuanlan.zhihu.com/p/54755387?from_voters_page=true

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