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coderzyjcoderzyj
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注解，反射
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‎.idea/misc.xml

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‎.idea/modules.xml

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‎.idea/uiDesigner.xml

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‎.idea/vcs.xml

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‎java-annotation/java-annotation.iml

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<?xml version="1.0" encoding="UTF-8"?>
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<module type="JAVA_MODULE" version="4">
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<component name="NewModuleRootManager" inherit-compiler-output="true">
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<exclude-output />
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<content url="file://$MODULE_DIR$">
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<sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
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</content>
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<orderEntry type="inheritedJdk" />
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<orderEntry type="sourceFolder" forTests="false" />
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</component>
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</module>

‎java-annotation/src/com/zyj/annotation/AynasAnnotation.java

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package com.zyj.annotation;
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import java.lang.annotation.Annotation;
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import java.lang.reflect.Field;
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/**
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* 版权声明：CopyRight (c) 2018 ucarinc. All Rights Reserved.
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*
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* @author : 张勇杰
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* @date : 2018/11/10 17:38
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* @Version : v1.0
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* @description 使用反射读取注解的信息，模拟处理注解信息的流程
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**/
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public class AynasAnnotation {
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public static void main(String[] args) {
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try {
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Class clazz = Class.forName("com.zyj.annotation.Student");
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//获得类所有有效注解
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Annotation[] annotations = clazz.getAnnotations();
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for(Annotation a : annotations){
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/*ZyjTable zyjTable = (ZyjTable)a;
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System.out.println(zyjTable.value());*/
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System.out.println(a);
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}
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//获得类制定的注解
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ZyjTable zyjTable = (ZyjTable) clazz.getAnnotation(ZyjTable.class);
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System.out.println(zyjTable.value());
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Field[] fields = clazz.getDeclaredFields();
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for(Field f:fields){
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ZyjField zyjField = f.getAnnotation(ZyjField.class);
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System.out.println(zyjField.columnName()+"--"+zyjField.type()+"--"+zyjField.length());
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}
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//根据获得的表明，字段信息，拼出DDL语句，然后，使用JDBC执行这个SQL，在数据库种生成相关的表
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} catch (ClassNotFoundException e) {
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e.printStackTrace();
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}
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}
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}

‎java-annotation/src/com/zyj/annotation/Student.java

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package com.zyj.annotation;
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/**
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* 版权声明：CopyRight (c) 2018 ucarinc. All Rights Reserved.
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*
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* @author : 张勇杰
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* @date : 2018/11/10 17:26
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* @Version : v1.0
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* @description
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**/
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@ZyjTable("tb_Student")
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@ZyjTable1("tb_Student1111")
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public class Student {
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@ZyjField(columnName = "id",type="int",length=10)
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private int id;
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@ZyjField(columnName = "age",type="int",length = 3)
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private int age;
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@ZyjField(columnName = "sname",type="String",length = 10)
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private String name;
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public int getId() {
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return id;
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}
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public void setId(int id) {
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this.id = id;
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}
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public int getAge() {
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return age;
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}
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public void setAge(int age) {
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this.age = age;
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}
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public String getName() {
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return name;
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}
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public void setName(String name) {
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this.name = name;
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}
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}

‎java-annotation/src/com/zyj/annotation/ZyjField.java

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package com.zyj.annotation;
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import java.lang.annotation.ElementType;
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import java.lang.annotation.Retention;
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import java.lang.annotation.RetentionPolicy;
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import java.lang.annotation.Target;
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@Target({ElementType.FIELD})
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@Retention(RetentionPolicy.RUNTIME)
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public @interface ZyjField {
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String columnName();
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String type();
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int length();
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}

‎java-annotation/src/com/zyj/annotation/ZyjTable.java

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package com.zyj.annotation;
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import java.lang.annotation.ElementType;
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import java.lang.annotation.Retention;
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import java.lang.annotation.RetentionPolicy;
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import java.lang.annotation.Target;
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@Target(value = {ElementType.TYPE})
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@Retention(RetentionPolicy.RUNTIME)
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public @interface ZyjTable {
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String value();
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}

‎java-annotation/src/com/zyj/annotation/ZyjTable1.java

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package com.zyj.annotation;
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import java.lang.annotation.ElementType;
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import java.lang.annotation.Retention;
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import java.lang.annotation.RetentionPolicy;
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import java.lang.annotation.Target;
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@Target(value = {ElementType.TYPE})
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@Retention(RetentionPolicy.RUNTIME)
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public @interface ZyjTable1 {
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String value();
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}

‎java-base.iml

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<?xml version="1.0" encoding="UTF-8"?>
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<module type="JAVA_MODULE" version="4">
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<component name="NewModuleRootManager" inherit-compiler-output="true">
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<exclude-output />
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<content url="file://$MODULE_DIR$">
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<sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
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</content>
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<orderEntry type="inheritedJdk" />
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<orderEntry type="sourceFolder" forTests="false" />
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</component>
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</module>

‎java-reflect/java-reflect.iml

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<?xml version="1.0" encoding="UTF-8"?>
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<module type="JAVA_MODULE" version="4">
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<component name="NewModuleRootManager" inherit-compiler-output="true">
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<exclude-output />
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<content url="file://$MODULE_DIR$">
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<sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
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</content>
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<orderEntry type="inheritedJdk" />
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<orderEntry type="sourceFolder" forTests="false" />
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</component>
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</module>

‎java-reflect/src/com/zyj/bean/User.java

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package com.zyj.bean;
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/**
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* 版权声明：CopyRight (c) 2018 ucarinc. All Rights Reserved.
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*
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* @author : 张勇杰
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* @date : 2018/11/10 18:02
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* @Version : v1.0
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* @description
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**/
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public class User {
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private int id;
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private int age;
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private String name;
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public User() {
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}
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public User(int id, int age, String name) {
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this.id = id;
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this.age = age;
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this.name = name;
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}
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public int getId() {
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return id;
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}
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public void setId(int id) {
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this.id = id;
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}
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public int getAge() {
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return age;
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}
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public void setAge(int age) {
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this.age = age;
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}
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public String getName() {
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return name;
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}
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public void setName(String name) {
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this.name = name;
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}
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}

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