zvm-jvm，使用java完成对jvm的设计，这个也是我的毕业设计的初稿.zip

package com.zvm.classfile; import com.zvm.basestruct.U1; import com.zvm.basestruct.U2; import com.zvm.basestruct.U4; import com.zvm.classfile.attribute.*; import com.zvm.classfile.attribute.LocalVariableTable.LocalVariable; import com.zvm.classfile.attribute.LocalVariableTypeTable.LocalVariableType; import com.zvm.classfile.attribute.RuntimeVisibleParameterAnnotations.ParameterAnnotation; import com.zvm.classfile.attribute.code.ExceptionTable; import com.zvm.classfile.attribute.innerClasses.Classes; import com.zvm.classfile.attribute.lineNumberTable.LineNumber; import com.zvm.classfile.attribute.runtimeVisibleAnnotations.*; import com.zvm.classfile.attribute.stackmaptable.*; import com.zvm.classfile.attribute.stackmaptable.verificationtypeinfo.*; import com.zvm.classfile.constantpool.*; import com.zvm.utils.TypeUtils; @SuppressWarnings("AlibabaCommentsMustBeJavadocFormat") public class ClassFile { public U4 magic; public U2 minorVersion; public U2 majorVersion; public U2 constantPoolCount; public CpInfo constantPool = new CpInfo(); public U2 accessFlags; public U2 thisClass; public U2 superClass; public U2 interfaceCount; public U2[] interfaces; public U2 fieldCount; public FieldInfo[] fields ; public U2 methodsCount; public MethodInfo[] methods ; public U2 attributesCount; public AttributeBase[] attributes ; /** * 将字节码转换为ClassFile * @param bytecode */ public void processByteCode(byte[] bytecode){ IOUtils.bytecode = bytecode; IOUtils.index = 0; magic = IOUtils.readU4(); minorVersion = IOUtils.readU2(); majorVersion = IOUtils.readU2(); constantPoolCount = IOUtils.readU2(); Integer poolSize = TypeUtils.byteArr2Int(constantPoolCount.u2); /*读取常量池*/ processConstantPool(constantPool, poolSize); accessFlags = IOUtils.readU2(); thisClass = IOUtils.readU2(); superClass = IOUtils.readU2(); interfaceCount = IOUtils.readU2(); Integer interfaceCountInteger = TypeUtils.byteArr2Int(interfaceCount.u2); interfaces = new U2[interfaceCountInteger]; for(Integer i = 0; i < interfaceCountInteger; i ++){ interfaces[i] = IOUtils.readU2(); } fieldCount = IOUtils.readU2(); Integer fieldCountInteger = TypeUtils.byteArr2Int(fieldCount.u2); fields = processFields( fieldCountInteger); methodsCount = IOUtils.readU2(); Integer methodsCountInteger = TypeUtils.byteArr2Int(methodsCount.u2); methods = processMethods( methodsCountInteger); attributesCount = IOUtils.readU2(); Integer tempAttributesCount = TypeUtils.byteArr2Int(attributesCount.u2); attributes = new AttributeBase[tempAttributesCount]; for(Integer i = 0; i < tempAttributesCount; i ++){ processAttribute( i, attributes); } } /** * 解析字节码中的方法 * @param methodsCountInteger * @return */ private MethodInfo[] processMethods(Integer methodsCountInteger) { MethodInfo[] methodInfos = new MethodInfo[methodsCountInteger]; for(Integer i = 0; i < methodsCountInteger; i ++){ methodInfos[i] = new MethodInfo(); methodInfos[i].accessFlags = IOUtils.readU2(); methodInfos[i].nameIndex = IOUtils.readU2(); methodInfos[i].descriptorIndex = IOUtils.readU2(); methodInfos[i].attributeCount = IOUtils.readU2(); Integer tempAttributesCount = TypeUtils.byteArr2Int(methodInfos[i].attributeCount.u2); methodInfos[i].attributes = new AttributeBase[tempAttributesCount]; for(Integer j = 0; j < tempAttributesCount; j ++){ processAttribute( j, methodInfos[i].attributes); } } return methodInfos; } /** * 解析字节码中的字段 * @param fieldCountInteger * @return */ private FieldInfo[] processFields(Integer fieldCountInteger) { FieldInfo[] fieldInfos = new FieldInfo[fieldCountInteger]; for(Integer i = 0; i < fieldCountInteger; i ++){ fieldInfos[i] = new FieldInfo(); fieldInfos[i].accessFlags = IOUtils.readU2(); fieldInfos[i].nameIndex = IOUtils.readU2(); fieldInfos[i].descriptorIndex = IOUtils.readU2(); fieldInfos[i].attributeCount = IOUtils.readU2(); Integer tempAttributesCount = TypeUtils.byteArr2Int(fieldInfos[i].attributeCount.u2); fieldInfos[i].attributes = new AttributeBase[tempAttributesCount]; for(Integer j = 0; j < tempAttributesCount; j ++){ processAttribute( j, fieldInfos[i].attributes); } } return fieldInfos; } /** * 解析字节码中的常量池 * @param constantPool * @param poolSize */ private void processConstantPool(CpInfo constantPool, Integer poolSize) { constantPool.cpInfo = new ConstantBase[poolSize]; for(Integer i = 0; i < poolSize - 1; i++){ U1 tag = IOUtils.readU1(); Integer integerTag = TypeUtils.byteArr2Int(tag.u1); if(integerTag == 1){ ConstantUtf8 constantUtf8 = new ConstantUtf8(); constantUtf8.tag = tag; constantUtf8.length = IOUtils.readU2(); Integer utf8Len = TypeUtils.byteArr2Int( constantUtf8.length.u2); constantUtf8.bytes = new U1[utf8Len]; for(Integer j = 0; j < utf8Len; j ++){ constantUtf8.bytes[j] = IOUtils.readU1(); } constantPool.cpInfo[i] = constantUtf8; } else if(integerTag == 3){ ConstantInteger constantInteger = new ConstantInteger(); constantInteger.tag = tag; constantInteger.bytes = IOUtils.readU4(); constantPool.cpInfo[i] = constantInteger; } else if(integerTag == 4){ ConstantFloat constantFloat = new ConstantFloat(); constantFloat.tag = tag; constantFloat.bytes = IOUtils.readU4(); constantPool.cpInfo[i] = constantFloat; }else if (integerTag == 5){ ConstantLong constantLong = new ConstantLong(); constantLong.tag = tag; constantLong.highBytes = IOUtils.readU4(); constantLong.lowBytes = IOUtils.readU4(); /*double和long类型会跳过一个常量标识*/ constantPool.cpInfo[i ++] = constantLong; }else if(integerTag == 6){ ConstantDouble constantDouble = new ConstantDouble(); constantDouble.tag = tag; constantDouble.highBytes = IOUtils.readU4(); constantDouble.lowBytes = IOUtils.readU4(); /*double和long类型会跳过一个常量标识*/ constantPool.cpInfo[i ++] = constantDouble; }else if(integerTag == 7){ ConstantClass constantClass = new ConstantClass(); constantClass.tag = tag; constantClass.nameIndex = IOUtils.readU2(); constantPool.cpInfo[i] = constantClass; }else if(integerTag == 8){ ConstantString constantString = new ConstantString(); constantString.tag = tag; constantString.stringIndex = IOUtils.readU2(); constantPool.cpInfo[i] = constantString; }else if(integerTag == 9){ ConstantFieldref constantFieldref = new ConstantFieldref(); constantFieldref.tag = tag; constantFieldref.classIndex = IOUtils.readU2(); constantFieldref.nameAndTypeIndex = IOUtils.readU2(); constantPool.cpInfo[i] = constantFieldref; }else if(int