package aresoft.controller.test;
import java.lang.annotation.Annotation;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;
public class Demo3 {
@SuppressWarnings("unchecked")
public static <T> void test(){
try {
//1,加载类
Class clazz=Class.forName("aresoft.controller.test.DemoBean");
//2、根据构造器参数类型获取相应的构造器对象
Constructor csr = clazz.getConstructor(String[].class);
String str[]={"1","testname","man"};
//3、创建实体对象
T t1 = (T)csr.newInstance((Object)str);
List<Field> fieldList=getFields(clazz);
int flag=0;
Object obj=null;
for(Field f:fieldList){
if(isClassType(f)){
flag=flag+1;
Method method=commonMethod(Meiju.GET.getName(),clazz,f);
// System.out.println(method.getReturnType());
if(!method.getReturnType().toString().equals("void")){
obj=method.invoke(t1,new Object[]{});
}
System.out.println(obj.toString());
if(flag>2){
break;
}
Annotation[] as=f.getAnnotations(); //每个Field 的注释
if(as.length >=0){
for(Annotation a:as){
// System.out.println("annotation:"+a.toString());
}
}
}
}
//方法注解
Zhujie zjmethod=clazz.getMethod(commonMethod(Meiju.GET.getName(),clazz,fieldList.get(1)).getName(),new Class[]{}).getAnnotation(Zhujie.class);
System.out.println("getName()方法的注解："+zjmethod.name());
//字段注解
Zhujie zjfield=clazz.getDeclaredField((fieldList.get(1)).getName()).getAnnotation(Zhujie.class);
System.out.println("name字段的注解："+zjfield.name());
//利用枚举获得方法的前面是get还是set
Method setmethod=commonMethod(Meiju.SET.getName(),clazz,fieldList.get(3));
if(setmethod.getReturnType().toString().equals("void")){ //如果返回类型 void
System.out.println("无返回类型");
}
Integer i=new Integer(1);
setmethod.invoke(t1,i);
} catch (Exception e) {
e.printStackTrace();
}
}
//得到所有的Field包括父类的
public static List<Field> getFields(Class<?> clazz){
List<Field> fieldList=new ArrayList<Field>();
do{
Field[] fields=clazz.getDeclaredFields();
for(Field f:fields){
fieldList.add(f);
}
clazz=clazz.getSuperclass();
}while(clazz != Object.class && clazz!=null);
return fieldList;
}
//判断Field是否是基本类型
public static Boolean isClassType(Field field){
Class<?> type=field.getType();
Boolean isBaseClass=false;
if(type.isPrimitive() || type.getPackage() !=null
|| type.getPackage().getName().equals("java.lang")
|| type.getPackage().getName().equals("java.math")
|| type.getPackage().getName().equals("java.math")){
isBaseClass=true;
}else if(type.isArray()){
isBaseClass=false;
}
return isBaseClass;
}
//Method get
public static Method getMethod(Class<?> clazz,Field field){
StringBuffer sb =new StringBuffer();
sb.append(Meiju.GET.getName());
Method method=null;
try {
String firstChar=field.getName().substring(0, 1).toUpperCase();
sb.append(firstChar);
sb.append(field.getName().substring(1, field.getName().length()));
method=clazz.getDeclaredMethod(sb.toString(),new Class[]{});
} catch (Exception e) {
e.printStackTrace();
}
return method;
}
//Method set
public static Method setMethod(Class<?> clazz,Field field){
StringBuffer sb =new StringBuffer();
sb.append(Meiju.SET.getName());
Method method=null;
try {
String firstChar=field.getName().substring(0, 1).toUpperCase();
sb.append(firstChar);
sb.append(field.getName().substring(1, field.getName().length()));
method=clazz.getDeclaredMethod(sb.toString(),field.getType());
} catch (Exception e) {
e.printStackTrace();
}
return method;
}
//Method common
public static Method commonMethod(String gsmethod,Class<?> clazz,Field field){
StringBuffer sb =new StringBuffer();
sb.append(gsmethod);//get or set
Method method=null;
try {
String firstChar=field.getName().substring(0, 1).toUpperCase();
sb.append(firstChar);
sb.append(field.getName().substring(1, field.getName().length()));
if(gsmethod.equals(Meiju.GET.getName())){
method=clazz.getDeclaredMethod(sb.toString(),new Class[]{});
}else if(gsmethod.equals(Meiju.SET.getName())){
method=clazz.getDeclaredMethod(sb.toString(),field.getType());
}
} catch (Exception e) {
e.printStackTrace();
}
return method;
}
public static void main(String[] args) {
test();
}
}
//实体类
package aresoft.controller.test;
import javax.persistence.Column;
@Zhujie(name="jeecg_demo")
public class DemoBean {
/**id*/
@Zhujie(name="id")
private String id;
/**姓名*/
@Zhujie(name="name")
private String name;
/**性别*/
private String sex;
/**年龄*/
private Integer age;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
@Zhujie(name="jeecg_demo_method")
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
public DemoBean(String[] string) {
super();
this.id = string[0];
this.name = string[1];
this.sex = string[2];
}
public DemoBean() {
super();
// TODO Auto-generated constructor stub
}
}
//注解
package aresoft.controller.test;
import static java.lang.annotation.ElementType.CONSTRUCTOR;
import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.LOCAL_VARIABLE;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.ElementType.PARAMETER;
import static java.lang.annotation.ElementType.TYPE;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
@Target({TYPE, FIELD, METHOD, PARAMETER, CONSTRUCTOR, LOCAL_VARIABLE})
@Retention(RetentionPolicy.RUNTIME)
public @interface Zhujie {
String name() default "test";
}
//枚举
package aresoft.controller.test;
public enum Meiju {
GET("get"),SET("set");
private String name;
private Meiju(String name) {
this.name = name;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}