新增反射生成实例方法

panda-beans/src/main/java/org/panda/beans/util/BeanUtil.java

@@ -6,6 +6,7 @@ import org.slf4j.LoggerFactory;
 
 import java.beans.IntrospectionException;
 import java.beans.PropertyDescriptor;
+import java.lang.reflect.Constructor;
 import java.lang.reflect.Field;
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
@@ -208,4 +209,52 @@ public class BeanUtil {
         return fieldObjectMap;
     }
 
+    /**
+     *  通过无参数构造函数返回实例
+     * @param clazz
+     * @param <T>
+     * @return
+     */
+    public static  <T> T instantiateClass(Class<T> clazz){
+        T t = null;
+        try {
+            t = clazz.newInstance();
+        } catch (InstantiationException e) {
+            e.printStackTrace();
+        } catch (IllegalAccessException e) {
+            e.printStackTrace();
+        }
+
+        return t;
+    }
+
+    /**
+     *  通过有参数构造函数返回实例
+     * @param clazz
+     * @param params
+     * @param <T>
+     * @return
+     */
+    public static  <T> T instantiateClass(Class<T> clazz,Object... params){
+        T t = null;
+        Class[] classes = new Class[params.length];
+        for (int i=0;i<params.length;i++){
+            classes[i] = params[i].getClass();
+        }
+        try {
+          Constructor constructor = clazz.getConstructor(classes);
+          t =(T)constructor.newInstance(params);
+        } catch (NoSuchMethodException e) {
+            e.printStackTrace();
+        } catch (IllegalAccessException e) {
+            e.printStackTrace();
+        } catch (InstantiationException e) {
+            e.printStackTrace();
+        } catch (InvocationTargetException e) {
+            e.printStackTrace();
+        }
+
+        return t;
+    }
+
 }

panda-beans/src/test/java/org/panda/beans/entity/SysUser.java

@@ -17,6 +17,16 @@ public class SysUser {
 
     private Date updateTime;
 
+    public SysUser() {
+    }
+
+    public SysUser(Long id, String name, Date createTime, Date updateTime) {
+        this.id = id;
+        this.name = name;
+        this.createTime = createTime;
+        this.updateTime = updateTime;
+    }
+
     public Long getId() {
         return id;
     }
@@ -48,4 +58,14 @@ public class SysUser {
     public void setUpdateTime(Date updateTime) {
         this.updateTime = updateTime;
     }
+
+    @Override
+    public String toString() {
+        return "SysUser{" +
+                "id=" + id +
+                ", name='" + name + '\'' +
+                ", createTime=" + createTime +
+                ", updateTime=" + updateTime +
+                '}';
+    }
 }

panda-beans/src/test/java/org/panda/beans/util/BeanUtilTest.java

@@ -3,6 +3,7 @@ package org.panda.beans.util;
 import org.junit.Test;
 import org.panda.beans.entity.SysUser;
 
+import java.lang.reflect.Constructor;
 import java.lang.reflect.Method;
 import java.util.Date;
 
@@ -30,4 +31,14 @@ public class BeanUtilTest {
         }
     }
 
+
+    @Test
+    public void test(){
+
+//        SysUser sysUser = BeanUtil.instantiateClass(SysUser.class);
+        SysUser sysUser = BeanUtil.instantiateClass(SysUser.class,1L,"qi",new Date(),new Date());
+        System.out.println(sysUser);
+     //   System.out.println(sysUser);
+    }
+
 }