Merge pull request #46 from zhaohuXing/master

第五次

group11/1178243325/week07/build.gradle

@@ -0,0 +1,13 @@
+apply plugin: 'java'
+
+repositories {
+	mavenCentral()
+}
+
+dependencies {
+	compile("commons-io:commons-io:2.4")
+	//compile("commons-lang:commons-lang:2.6")
+	compile("org.apache.commons:commons-lang3:3.4")
+	testCompile("junit:junit:4.12")
+}
+

group11/1178243325/week07/readme.md

@@ -0,0 +1,12 @@
+## 讲课内容：
+- 17-03-29 ：JVM之classLoader
+
+## 第七周作业（04-03 至 04-09)
+- 实现对一个.class文件的常量池读取
+- 实现StackUtil
+- [文章](http://www.jianshu.com/p/502c1e5caa97)
+## 完成情况：
+
+
+## 我的收获：
+

group11/1178243325/week07/src/main/java/com/sprint/jvm/clz/AccessFlag.java

@@ -0,0 +1,25 @@
+package com.sprint.jvm.clz;
+
+public class AccessFlag {
+	private int flagValue; 
+
+	public AccessFlag(int value) {
+		this.flagValue = value;
+	}
+
+	public int getFlagValue() {
+		return flagValue;
+	}
+
+	public void setFlagValue(int flagValue) {
+		this.flagValue = flagValue;
+	}
+
+	public boolean isPublicClass() {
+		return (this.flagValue & 0x0001) != 0;
+	}
+
+	public boolean isFinalClass() {
+		return (this.flagValue & 0x0010) != 0;
+	}
+}

group11/1178243325/week07/src/main/java/com/sprint/jvm/clz/ClassFile.java

@@ -0,0 +1,71 @@
+package com.sprint.jvm.clz;
+
+import com.sprint.jvm.constant.ConstantPool;
+import com.sprint.jvm.constant.ClassInfo;
+public class ClassFile {
+	private int minorVersion;
+	private int majorVersion;
+
+	private AccessFlag accessFlag;
+	private ClassIndex clzIndex;
+	private ConstantPool pool;
+
+	public int getMinorVersion() {
+		return minorVersion;
+	}
+
+	public void setMinorVersion(int minorVersion) {
+		this.minorVersion = minorVersion;
+	}
+
+	public int getMajorVersion() {
+		return majorVersion;
+	}
+
+	public void setMajorVersion(int majorVersion) {
+		this.majorVersion = majorVersion;
+	}
+
+	public AccessFlag getAccessFlag() {
+		return accessFlag;
+	}
+
+	public void setAccessFlag(AccessFlag accessFlag) {
+		this.accessFlag = accessFlag;
+	} 
+
+	public ClassIndex getClassIndex() {
+		return clzIndex;
+	}
+
+	public void setClassIndex(ClassIndex clzIndex) {
+		this.clzIndex = clzIndex;
+	}
+
+	public ConstantPool getConstantPool() {
+		return pool;
+	}
+
+	public void setConstantPool(ConstantPool pool) {
+		this.pool = pool;
+	}
+
+	public void print() {
+		if (this.accessFlag.isPublicClass()) {
+			System.out.println("Access flag : public ");
+		}
+		System.out.println("Class Name:" + getClassName() );
+		System.out.println("Super Class Name:" + getSuperClassName());
+	}
+
+	private String getClassName() {
+		int thisClassIndex = this.clzIndex.getThisClassIndex();
+		ClassInfo thisClass = (ClassInfo)this.getConstantPool().getConstantInfo(thisClassIndex);	
+		return thisClass.getClassName();
+	}
+
+	private String getSuperClassName() {
+		ClassInfo superClass = (ClassInfo)this.getConstantPool().getConstantInfo(this.clzIndex.getSuperClassIndex());
+		return superClass.getClassName();
+	}
+}

group11/1178243325/week07/src/main/java/com/sprint/jvm/clz/ClassIndex.java

@@ -0,0 +1,22 @@
+package com.sprint.jvm.clz;
+
+public class ClassIndex {
+	private int thisClassIndex;
+	private int superClassIndex;
+
+	public int getThisClassIndex() {
+		return thisClassIndex;
+	}
+
+	public void setThisClassIndex(int index) {
+		this.thisClassIndex = index;
+	}
+
+	public int getSuperClassIndex() {
+		return superClassIndex;
+	}
+
+	public void setSuperClassIndex(int index) {
+		this.superClassIndex = index;
+	}
+}

group11/1178243325/week07/src/main/java/com/sprint/jvm/constant/ClassInfo.java

@@ -0,0 +1,28 @@
+package com.sprint.jvm.constant;
+
+public class ClassInfo extends ConstantInfo {
+	private int type = ConstantInfo.CLASS_INFO;
+	private int utf8Index;
+
+	public ClassInfo(ConstantPool pool) {
+		super(pool);
+	}
+
+	public void setUtf8Index(int index) {
+		this.utf8Index = index;
+	}
+
+	public int getUtf8Index() {
+		return utf8Index;
+	}
+
+	public int getType() {
+		return type;
+	}
+
+	public String getClassName() {
+		int index = getUtf8Index();
+		UTF8Info utf8Info = (UTF8Info)constantPool.getConstantInfo(index);
+		return utf8Info.getValue();
+	}
+}

group11/1178243325/week07/src/main/java/com/sprint/jvm/constant/ConstantInfo.java

@@ -0,0 +1,29 @@
+package com.sprint.jvm.constant;
+
+public abstract class ConstantInfo {
+	public static final int UTF8_INFO = 1;
+	public static final int FLOAT_INFO = 4;
+	public static final int CLASS_INFO = 7;
+	public static final int STRING_INFO = 8;
+	public static final int FIELD_INFO = 9;
+	public static final int METHOD_INFO = 10;
+	public static final int NAME_AND_TYPE_INFO = 12;
+	protected ConstantPool constantPool;
+
+	public ConstantInfo() {}
+
+	public ConstantInfo(ConstantPool pool) {
+		this.constantPool = pool;
+	}
+
+	public abstract int getType();
+
+	public ConstantPool getConstantPool() {
+		return constantPool;
+	}
+
+	public ConstantInfo getConstantInfo(int index) {
+		return this.constantPool.getConstantInfo(index);
+	}
+
+}

group11/1178243325/week07/src/main/java/com/sprint/jvm/constant/ConstantPool.java

@@ -0,0 +1,28 @@
+package com.sprint.jvm.constant;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class ConstantPool {
+	private List<ConstantInfo> constantInfos = new ArrayList<ConstantInfo>(); 
+
+	public ConstantPool() {
+
+	}
+
+	public void addConstantInfo(ConstantInfo info) {
+		this.constantInfos.add(info);
+	}
+
+	public ConstantInfo getConstantInfo(int index) {
+		return this.constantInfos.get(index);
+	}
+
+	public String getUTF8String(int index) {
+		return ((UTF8Info)this.constantInfos.get(index)).getValue();
+	}	
+
+	public Object getSize() {
+		return this.constantInfos.size() - 1;
+	}
+} 

group11/1178243325/week07/src/main/java/com/sprint/jvm/constant/FieldRefInfo.java

@@ -0,0 +1,52 @@
+package com.sprint.jvm.constant;
+
+public class FieldRefInfo extends ConstantInfo {
+	private int type = ConstantInfo.FIELD_INFO;
+	private int classInfoIndex;
+	private int nameAndTypeIndex;
+
+	public FieldRefInfo(ConstantPool pool) {
+		super(pool);
+	}
+
+	public int getType() {
+		return type;
+	}
+
+	public int getClassInfoIndex() {
+		return classInfoIndex;
+	}
+
+	public void setClassInfoIndex(int classInfoIndex) {
+		this.classInfoIndex = classInfoIndex;
+	}
+
+	public int getNameAndTypeIndex() {
+		return nameAndTypeIndex;
+	}
+
+	public void setNameAndTypeIndex(int nameAndTypeIndex) {
+		this.nameAndTypeIndex = nameAndTypeIndex;
+	}
+
+	public String toString() {
+		NameAndTypeInfo typeInfo = (NameAndTypeInfo)this.getConstantInfo(this.getNameAndTypeIndex());
+		return getClassName() + ":" + typeInfo.getName() + ":" + typeInfo.getTypeInfo() + "]"; 
+	}
+
+	public String getClassName() {
+		ClassInfo classInfo = (ClassInfo)this.getConstantInfo(this.getClassInfoIndex());
+		UTF8Info utf8Info = (UTF8Info)this.getConstantInfo(classInfo.getUtf8Index());
+		return utf8Info.getValue();
+	}
+
+	public String getFieldName() {
+		NameAndTypeInfo typeInfo = (NameAndTypeInfo)this.getConstantInfo(this.getNameAndTypeIndex());
+		return typeInfo.getName();
+	}
+
+	public String getFieldType() {
+		NameAndTypeInfo typeInfo = (NameAndTypeInfo)this.getConstantInfo(this.getNameAndTypeIndex());
+		return typeInfo.getTypeInfo();
+	}
+}

group11/1178243325/week07/src/main/java/com/sprint/jvm/constant/MethodRefInfo.java

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+package com.sprint.jvm.constant;
+
+public class MethodRefInfo extends ConstantInfo {
+	private int type = ConstantInfo.METHOD_INFO;
+
+	private int classInfoIndex;
+	private int nameAndTypeIndex;
+
+	public MethodRefInfo(ConstantPool pool) {
+		super(pool);
+	}
+
+	public int getType() {
+		return type;
+	}
+
+	public int getClassInfoIndex() {
+		return classInfoIndex;
+	}
+
+	public void setClassInfoIndex(int classInfoIndex) {
+		this.classInfoIndex = classInfoIndex;
+	}
+
+	public int getNameAndTypeIndex() {
+		return nameAndTypeIndex;
+	}
+
+	public void setNameAndTypeIndex(int nameAndTypeIndex) {
+		this.nameAndTypeIndex = nameAndTypeIndex;
+	}
+
+	public String toString() {
+		return getClassName() + ":" + this.getMethodName() + ":" + this.getParamAndReturnType(); 
+	}
+
+	public String getClassName() {
+		ConstantPool pool = this.getConstantPool();
+		ClassInfo clzInfo = (ClassInfo)pool.getConstantInfo(this.getClassInfoIndex());
+		return clzInfo.getClassName();
+	}
+
+	public String getMethodName() {
+		ConstantPool pool = this.getConstantPool();
+		NameAndTypeInfo typeInfo = (NameAndTypeInfo)pool.getConstantInfo(this.getNameAndTypeIndex());
+		return typeInfo.getName();
+	}
+
+	public String getParamAndReturnType() {
+		ConstantPool pool = this.getConstantPool();
+		NameAndTypeInfo typeInfo = (NameAndTypeInfo)pool.getConstantInfo(this.getNameAndTypeIndex());
+		return typeInfo.getTypeInfo();
+	}
+}
+

group11/1178243325/week07/src/main/java/com/sprint/jvm/constant/NameAndTypeInfo.java

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+package com.sprint.jvm.constant;
+
+public class NameAndTypeInfo extends ConstantInfo {
+	public int type = ConstantInfo.NAME_AND_TYPE_INFO;
+
+	private int index1;
+	private int index2;
+
+	public NameAndTypeInfo(ConstantPool pool) {
+		super(pool);
+	}
+
+	public int getType() {
+		return type;
+	}
+
+	public int getIndex1() {
+		return index1;
+	}
+
+	public void setIndex1(int index1) {
+		this.index1 = index1;
+	}
+
+	public int getIndex2() {
+		return index2;
+	}
+
+	public void setIndex2(int index2) {
+		this.index2 = index2;
+	}
+
+	public String getName() {
+		ConstantPool pool = this.getConstantPool();
+		UTF8Info utf8Info1 = (UTF8Info)pool.getConstantInfo(index1);
+		return utf8Info1.getValue(); 
+	}
+
+	public String getTypeInfo() {
+		ConstantPool pool = this.getConstantPool();
+		UTF8Info utf8Info2 = (UTF8Info)pool.getConstantInfo(index2);
+		return utf8Info2.getValue();
+	}
+
+	public String toString() {
+		return "(" + getName() + "," + getTypeInfo() + ")";
+	}
+
+
+}
+
+