authorization

corejava/corejava.iml

@@ -11,5 +11,8 @@
     </content>
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" name="Maven: org.projectlombok:lombok:1.18.8" level="project" />
+    <orderEntry type="library" name="Maven: com.alibaba:fastjson:1.2.55" level="project" />
+    <orderEntry type="library" name="Maven: com.google.code.gson:gson:2.8.5" level="project" />
   </component>
 </module>

corejava/pom.xml

@@ -11,5 +11,25 @@
 
     <artifactId>corejava</artifactId>
 
+<dependencies>
 
+    <!--lombok,简化实体类,mybatis plus和它很搭配-->
+    <dependency>
+        <groupId>org.projectlombok</groupId>
+        <artifactId>lombok</artifactId>
+        <optional>true</optional>
+    </dependency>
+    <dependency>
+        <groupId>com.alibaba</groupId>
+        <artifactId>fastjson</artifactId>
+        <version>1.2.55</version>
+    </dependency>
+
+    <dependency>
+        <groupId>com.google.code.gson</groupId>
+        <artifactId>gson</artifactId>
+    </dependency>
+
+
+</dependencies>
 </project>

corejava/src/main/java/com/zz/classdemo/ClassDTO.java

@@ -0,0 +1,16 @@
+package com.zz.classdemo;
+
+import lombok.Data;
+
+import java.util.Set;
+
+/**
+ * @Description: java类作用描述
+ * @Author: Bsea
+ * @CreateDate: 2019/9/25$ 21:44$
+ */
+@Data
+public class ClassDTO {
+    private String name;
+    private String students;
+}

corejava/src/main/java/com/zz/classdemo/ClassMaster.java

@@ -0,0 +1,18 @@
+package com.zz.classdemo;
+
+import lombok.Data;
+
+import java.util.Set;
+
+/**
+ * @Description: java类作用描述
+ * @Author: Bsea
+ * @CreateDate: 2019/9/25$ 21:42$
+ */
+@Data
+public class ClassMaster {
+    private String name;
+    private Set<Student> students;
+
+
+}

corejava/src/main/java/com/zz/classdemo/Student.java

@@ -0,0 +1,38 @@
+package com.zz.classdemo;
+
+/**
+ * @Description: java类作用描述
+ * @Author: Bsea
+ * @CreateDate: 2019/9/25$ 21:28$
+ */
+public class Student {
+
+    private String name;
+
+    private Integer age;
+
+    public Student() {
+
+    }
+
+    public Student(String name,Integer age) {
+        this.name = name;
+        this.age = age;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public Integer getAge() {
+        return age;
+    }
+
+    public void setAge(Integer age) {
+        this.age = age;
+    }
+}

corejava/src/main/java/com/zz/classdemo/Test.java

@@ -0,0 +1,148 @@
+package com.zz.classdemo;
+
+import com.zz.thread.Count;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Field;
+import java.lang.reflect.Method;
+
+/**
+ * @Description: java类作用描述
+ * @Author: Bsea
+ * @CreateDate: 2019/9/25$ 21:21$
+ */
+public class Test {
+    public static void main(String[] args) {
+//        Count count=new Count();
+//        Class c=count.getClass();
+//        //利用反射 获取一个类的所有属性
+//        Field[] fs=c.getDeclaredFields();
+//        for(Field field:fs){
+//            System.out.println(field.getName());
+//        }
+        try {
+            testConstructor();
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+
+    }
+
+
+    public static void testMethod() throws Exception {
+        Class<Student> aClass = (Class<Student>) Class.forName("com.zz.classdemo.Student");
+        //1.获取方法
+        // 获取取clazz对应类中的所有方法--方法数组（一）
+        // 不能获取private方法,并且获取从父类继承来的所有方法
+        Method[] methods = aClass.getMethods();
+        for (Method method:methods) {
+            System.out.println(method);
+        }
+        System.out.println("================================");
+        //2.获取方法
+        // 获取取clazz对应类中的所有方法--方法数组（一）
+        // 不能获取private方法,不获取从父类继承来的所有方法
+        Method[] declaredMethods = aClass.getDeclaredMethods();
+        for (Method method:declaredMethods) {
+            System.out.println(method);
+        }
+
+        System.out.println("=================================");
+        //  1.3.获取指定的方法
+        //  需要参数名称和参数列表，无参则不需要写
+        //  对于方法public void setName(String name) {  }
+        Method method = aClass.getDeclaredMethod("setName", String.class);
+        System.out.println(method);
+        //  而对于方法public void setAge(int age) {  }
+        method = aClass.getDeclaredMethod("setAge", Integer.class);
+        System.out.println(method);
+        //  这样写是获取不到的，如果方法的参数类型是int型
+        //  如果方法用于反射，那么要么int类型写成Integer： public void setAge(Integer age) {  }
+        //  要么获取方法的参数写成int.class
+
+        //2.执行方法
+        //  invoke第一个参数表示执行哪个对象的方法，剩下的参数是执行方法时需要传入的参数
+        Object obje = aClass.newInstance();
+        method.invoke(obje,2);
+
+        //如果一个方法是私有方法，第三步是可以获取到的，但是这一步却不能执行
+        //私有方法的执行，必须在调用invoke之前加上一句method.setAccessible（true）;
+    }
+
+    /**
+     *  把类对象和类方法名作为参数，执行方法
+     *
+     *  把全类名和方法名作为参数，执行方法
+     *  可变参数可以放数组
+     * @param obj: 方法执行的那个对象.
+     * @param methodName: 类的一个方法的方法名. 该方法也可能是私有方法.
+     * @param args: 调用该方法需要传入的参数
+     * @return: 调用方法后的返回值
+     *
+     */
+    public Object invoke(Object obj, String methodName, Object ... args) throws Exception{
+        //1. 获取 Method 对象
+        //   因为getMethod的参数为Class列表类型，所以要把参数args转化为对应的Class类型。
+
+        Class [] parameterTypes = new Class[args.length];
+        for(int i = 0; i < args.length; i++){
+            parameterTypes[i] = args[i].getClass();
+            System.out.println(parameterTypes[i]);
+        }
+
+        Method method = obj.getClass().getDeclaredMethod(methodName, parameterTypes);
+        //如果使用getDeclaredMethod，就不能获取父类方法，如果使用getMethod，就不能获取私有方法
+
+        //
+        //2. 执行 Method 方法
+        //3. 返回方法的返回值
+        return method.invoke(obj, args);
+    }
+
+    public static void testField() throws Exception {
+        Class<Student> aClass = (Class<Student>) Class.forName("com.zz.classdemo.Student");
+        //1.获取字段
+        //  1.1 获取所有字段 -- 字段数组
+        //     可以获取公用和私有的所有字段，但不能获取父类字段
+        Field[] declaredFields = aClass.getDeclaredFields();
+        for (Field field:declaredFields) {
+            System.out.println(field);
+        }
+        System.out.println("=============================");
+        //  1.2获取指定字段
+        Field field = aClass.getDeclaredField("name");
+        System.out.println(field.getName());
+
+        System.out.println("==============================");
+
+        Student student = new Student();
+        //如果字段是私有的，不管是读值还是写值，都必须先调用setAccessible（true）方法
+        field.setAccessible(true);
+        student.setAge(1);
+        student.setName("张三");
+        //2.使用字段
+        //  2.1获取指定对象的指定字段的值
+        Object o = field.get(student);
+        System.out.println(o);
+        System.out.println("==========================");
+        //  2.2设置指定对象的指定对象Field值
+        field.set(student, "DEF");
+        System.out.println(student.getName());
+    }
+    public static void testConstructor() throws Exception{
+        Class<Student> aClass = (Class<Student>) Class.forName("com.zz.classdemo.Student");
+        //1. 获取 Constructor 对象
+        //   1.1 获取全部
+        Constructor<?>[] constructors = aClass.getConstructors();
+        for (Constructor constructor:constructors) {
+            System.out.println(constructor);
+        }
+        System.out.println("============================");
+        //  1.2获取某一个，需要参数列表
+        Constructor<Student> constructor = aClass.getConstructor(String.class, Integer.class);
+        System.out.println(constructor);
+        System.out.println("============================");
+        //2. 调用构造器的 newInstance() 方法创建对象
+        Object obj = constructor.newInstance("zhagn", 1);
+    }
+}

corejava/src/main/java/com/zz/classdemo/Test2.java

@@ -0,0 +1,17 @@
+package com.zz.classdemo;
+
+/**
+ * @Description: java类作用描述
+ * @Author: Bsea
+ * @CreateDate: 2019/9/25$ 21:45$
+ */
+public class Test2 {
+    public static void main(String[] args) {
+        ClassDTO dto=new ClassDTO();
+        dto.setName("java10班");
+        dto.setStudents("[{name:\"张三\",age:21},{name:\"李四\",age:81}]");
+
+
+
+    }
+}

corejava/src/main/java/com/zz/proxy/HelloService.java

@@ -0,0 +1,22 @@
+package com.zz.proxy;
+
+/**
+ * @Description: java类作用描述
+ * @Author: Bsea
+ * @CreateDate: 2019/9/23$ 21:11$
+ */
+// 委托类
+public class HelloService implements IHelloService {
+
+    @Override
+    public String sayHello(String userName) {
+        System.out.println(userName + " hello");
+        return userName + " hello";
+    }
+
+    @Override
+    public String sayByeBye(String userName) {
+        System.out.println(userName + " ByeBye");
+        return userName + " ByeBye";
+    }
+}

corejava/src/main/java/com/zz/proxy/IHelloService.java

@@ -0,0 +1,25 @@
+package com.zz.proxy;
+
+/**
+ * @Description: java类作用描述
+ * @Author: Bsea
+ * @CreateDate: 2019/9/23$ 21:10$
+ */
+// 委托类接口
+public interface IHelloService {
+
+    /**
+     * 方法1
+     * @param userName
+     * @return
+     */
+    String sayHello(String userName);
+
+    /**
+     * 方法2
+     * @param userName
+     * @return
+     */
+    String sayByeBye(String userName);
+
+}

corejava/src/main/java/com/zz/proxy/JavaProxyInvocationHandler.java

@@ -0,0 +1,64 @@
+package com.zz.proxy;
+
+import java.lang.reflect.InvocationHandler;
+import java.lang.reflect.Method;
+import java.lang.reflect.Proxy;
+
+/**
+ * @Description: java类作用描述
+ * @Author: Bsea
+ * @CreateDate: 2019/9/23$ 21:11$
+ */
+// 中间类
+public class JavaProxyInvocationHandler implements InvocationHandler {
+
+    /**
+     * 中间类持有委托类对象的引用,这里会构成一种静态代理关系
+     */
+    private Object obj ;
+
+    /**
+     * 有参构造器,传入委托类的对象
+     * @param obj 委托类的对象
+     */
+    public JavaProxyInvocationHandler(Object obj){
+        this.obj = obj;
+
+    }
+
+    /**
+     * 动态生成代理类对象,Proxy.newProxyInstance
+     * @return 返回代理类的实例
+     */
+    public Object newProxyInstance() {
+        return Proxy.newProxyInstance(
+                //指定代理对象的类加载器
+                obj.getClass().getClassLoader(),
+                //代理对象需要实现的接口，可以同时指定多个接口
+                obj.getClass().getInterfaces(),
+                //方法调用的实际处理者，代理对象的方法调用都会转发到这里
+                this);
+    }
+
+
+    /**
+     *
+     * @param proxy 代理对象
+     * @param method 代理方法
+     * @param args 方法的参数
+     * @return
+     * @throws Throwable
+     */
+    @Override
+    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
+        System.out.println("invoke before");
+        Object result = method.invoke(obj, args);
+        System.out.println("invoke after");
+        return result;
+    }
+
+//    @Override
+//    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
+//        return null;
+//    }
+}

corejava/src/main/java/com/zz/proxy/MainJavaProxy.java

@@ -0,0 +1,18 @@
+package com.zz.proxy;
+
+/**
+ * @Description: java类作用描述
+ * @Author: Bsea
+ * @CreateDate: 2019/9/23$ 21:12$
+ */
+// 测试动态代理类
+public class MainJavaProxy {
+    public static void main(String[] args) {
+        JavaProxyInvocationHandler proxyInvocationHandler = new JavaProxyInvocationHandler(new HelloService());
+        IHelloService helloService = (IHelloService) proxyInvocationHandler.newProxyInstance();
+        helloService.sayByeBye("allen");
+        helloService.sayHello("jerry");
+    }
+
+}
+

corejava/src/main/java/com/zz/thread/A.java

@@ -0,0 +1,18 @@
+package com.zz.thread;
+
+/**
+ * @Description: java类作用描述
+ * @Author: Bsea
+ * @CreateDate: 2019/9/21$ 19:14$
+ */
+public class A implements Runnable {
+    Count count;
+    public A(Count count99){
+        this.count=count99;
+    }
+    @Override
+    public void run() {
+        count.t1();
+
+    }
+}

corejava/src/main/java/com/zz/thread/B.java

@@ -0,0 +1,25 @@
+package com.zz.thread;
+
+/**
+ * @Description: java类作用描述
+ * @Author: Bsea
+ * @CreateDate: 2019/9/21$ 19:14$
+ */
+public class B implements Runnable {
+
+    Count count;
+    public B(Count count55){
+        this.count=count55;
+    }
+
+
+    @Override
+    public void run() {
+        try {
+            Thread.sleep(5000);
+            this.count.t2();
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
+    }
+}

corejava/src/main/java/com/zz/thread/Count.java

@@ -0,0 +1,49 @@
+package com.zz.thread;
+
+/**
+ * @Description: java类作用描述
+ * @Author: Bsea
+ * @CreateDate: 2019/9/21$ 16:52$
+ */
+public class Count  {
+    public int balance=1000;
+    public String  name;
+
+    public int getBalance(){
+        return this.balance;
+    }
+    public  void reduce(int num)  {
+        synchronized(this) {
+        if(num<=this.balance){
+
+                System.out.println("成功取出：" + num);
+                try {
+                    Thread.sleep(3000);
+                } catch (InterruptedException e) {
+                    e.printStackTrace();
+                }
+
+                this.balance = this.balance - num;
+            }
+        }
+
+    }
+
+
+    public synchronized void t1(){
+        System.out.println("进入t1方法");
+        try {
+            wait();
+            System.out.println("t1方法被叫醒");
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
+
+    }
+
+
+    public synchronized void t2(){
+       notifyAll();
+
+    }
+}

corejava/src/main/java/com/zz/thread/Demo1.java

@@ -0,0 +1,17 @@
+package com.zz.thread;
+
+/**
+ * @Description: java类作用描述
+ * @Author: Bsea
+ * @CreateDate: 2019/9/20$ 21:16$
+ */
+public class Demo1 implements Runnable{
+    @Override
+    public void run() {
+//        System.out.println("run方法里面就是一个线程需要执行的任务");
+    for(int i=0;i<2000;i++){
+        System.out.println("**********demo1运行**********");
+    }
+
+    }
+}

corejava/src/main/java/com/zz/thread/Demo2.java

@@ -0,0 +1,17 @@
+package com.zz.thread;
+
+/**
+ * @Description: java类作用描述
+ * @Author: Bsea
+ * @CreateDate: 2019/9/20$ 21:16$
+ */
+public class Demo2 implements Runnable{
+    @Override
+    public void run() {
+//        System.out.println("run方法里面就是一个线程需要执行的任务");
+    for(int i=0;i<2000;i++){
+        System.out.println("@@@@@@@@@@@@demo2运行**********");
+    }
+
+    }
+}

corejava/src/main/java/com/zz/thread/Demo3.java

@@ -0,0 +1,22 @@
+package com.zz.thread;
+
+import java.util.Date;
+
+/**
+ * @Description: java类作用描述
+ * @Author: Bsea
+ * @CreateDate: 2019/9/20$ 21:40$
+ */
+public class Demo3  implements Runnable{
+    @Override
+    public void run() {
+        try {
+            System.out.println("开始"+new Date());
+            //让当前线程睡3秒后执行
+            Thread.sleep(3000);
+            System.out.println("结束"+new Date());
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
+    }
+}

corejava/src/main/java/com/zz/thread/Demo4.java

@@ -0,0 +1,21 @@
+package com.zz.thread;
+
+/**
+ * @Description: java类作用描述
+ * @Author: Bsea
+ * @CreateDate: 2019/9/20$ 21:16$
+ */
+public class Demo4 implements Runnable{
+    Task task;
+    public Demo4(Task task){
+        this.task=task;
+    }
+    @Override
+    public void run() {
+//        System.out.println("run方法里面就是一个线程需要执行的任务");
+    for(int i=0;i<300;i++){
+        this.task.finishtask();
+    }
+
+    }
+}

corejava/src/main/java/com/zz/thread/Demo5.java

@@ -0,0 +1,21 @@
+package com.zz.thread;
+
+/**
+ * @Description: java类作用描述
+ * @Author: Bsea
+ * @CreateDate: 2019/9/20$ 21:16$
+ */
+public class Demo5 implements Runnable{
+    Task task;
+    public Demo5(Task task){
+        this.task=task;
+    }
+    @Override
+    public void run() {
+//        System.out.println("run方法里面就是一个线程需要执行的任务");
+    for(int i=0;i<300;i++){
+        this.task.finishtask();
+    }
+
+    }
+}

corejava/src/main/java/com/zz/thread/Demo6.java

@@ -0,0 +1,14 @@
+package com.zz.thread;
+
+/**
+ * @Description: java类作用描述
+ * @Author: Bsea
+ * @CreateDate: 2019/9/21$ 16:04$
+ */
+public class Demo6 extends Thread {
+
+    public void run(){
+        System.out.println("线程demo6 运行");
+    }
+
+}

corejava/src/main/java/com/zz/thread/T1.java

@@ -0,0 +1,19 @@
+package com.zz.thread;
+
+/**
+ * @Description: java类作用描述
+ * @Author: Bsea
+ * @CreateDate: 2019/9/21$ 16:55$
+ */
+public class T1 extends Thread {
+    Count count;
+    T1(Count c){
+        this.count=c;
+    }
+
+    public void run(){
+        count.reduce(1000);
+
+        System.out.println(count.getBalance());
+    }
+}

corejava/src/main/java/com/zz/thread/Task.java

@@ -0,0 +1,19 @@
+package com.zz.thread;
+
+/**
+ * @Description: java类作用描述
+ * @Author: Bsea
+ * @CreateDate: 2019/9/20$ 21:50$
+ */
+public class Task {
+    int total=600;
+    int runtime=0;
+
+    public void finishtask(){
+        //相当于this.total=this.total-1
+        this.total--;
+        this.runtime++;
+        System.out.println("total="+total+"****runtime="+runtime);
+    }
+
+}

corejava/src/main/java/com/zz/thread/Test.java

@@ -0,0 +1,33 @@
+package com.zz.thread;
+
+/**
+ * @Description: java类作用描述
+ * @Author: Bsea
+ * @CreateDate: 2019/9/20$ 21:21$
+ */
+public class Test {
+
+    public static void main(String[] args) {
+//        Demo1 demo1=new Demo1();
+//        Thread t1=new Thread(demo1);
+//        //启动一个线程是执行start方法
+//        t1.start();
+//
+//        Demo2 demo2=new Demo2();
+//        Thread t2=new Thread(demo2);
+//        t2.start();
+
+        Task task=new Task();
+
+        Demo4 demo4=new Demo4(task);
+        Thread t2=new Thread(demo4);
+        t2.start();
+
+        Demo5 demo5=new Demo5(task);
+        Thread t3=new Thread(demo5);
+        t3.start();
+
+        System.out.println("执行次数"+task.runtime);
+        System.out.println("任务总数"+task.total);
+    }
+}

corejava/src/main/java/com/zz/thread/Test2.java

@@ -0,0 +1,14 @@
+package com.zz.thread;
+
+/**
+ * @Description: java类作用描述
+ * @Author: Bsea
+ * @CreateDate: 2019/9/21$ 16:07$
+ */
+public class Test2 {
+
+    public static void main(String[] args) {
+        Demo6 demo6=new Demo6();
+        demo6.start();
+    }
+}

corejava/src/main/java/com/zz/thread/Test3.java

@@ -0,0 +1,18 @@
+package com.zz.thread;
+
+/**
+ * @Description: java类作用描述
+ * @Author: Bsea
+ * @CreateDate: 2019/9/21$ 16:58$
+ */
+public class Test3 {
+    public static void main(String[] args) {
+        Count count=new Count();
+
+        T1 t1=new T1(count);
+        T1 t2=new T1(count);
+
+        t1.start();
+        t2.start();
+    }
+}

corejava/src/main/java/com/zz/thread/Test4.java

@@ -0,0 +1,21 @@
+package com.zz.thread;
+
+/**
+ * @Description: java类作用描述
+ * @Author: Bsea
+ * @CreateDate: 2019/9/21$ 19:21$
+ */
+public class Test4 {
+
+    public static void main(String[] args) {
+        Count count2=new Count();
+
+        A a1=new A(count2);
+        B b=new B(count2);
+
+        Thread t1=new Thread(a1);
+        Thread t2=new Thread(b);
+        t1.start();
+        t2.start();
+    }
+}

corejava/src/main/java/com/zz/thread/Test5.java

@@ -0,0 +1,49 @@
+package com.zz.thread;
+
+/**
+ * @Description: java类作用描述
+ * @Author: Bsea
+ * @CreateDate: 2019/9/21$ 20:35$
+ */
+public class Test5 {
+
+    public static void main(String[] args) {
+        Test5 test5=new Test5();
+        Thread t1=new Thread(
+            new Runnable(){
+
+                @Override
+                public void run() {
+                    test5.t1();
+                }
+            }
+            );
+
+        Thread t2=new Thread(
+                new Runnable(){
+
+                    @Override
+                    public void run() {
+                        test5.t2();
+                    }
+                }
+        );
+
+        t1.start();
+        t2.start();
+    };
+    public synchronized  void t1(){
+        try {
+            System.out.println("开始等待");
+            wait();
+            System.out.println("被叫醒");
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
+    }
+
+    public synchronized  void t2(){
+        System.out.println("开始叫醒");
+        notify();
+    }
+}