先上一个基本的封装：
/**
* 获取classType
*
* @param type
* @param provinceCode
* @param cityCode
* @return
* @throws Exception
*/
public Class<?> getClassType(String type, String provinceCode, String cityCode, String suffix) throws Exception {
Class<?> classType = Class.forName("com.lkb.sb." + type + "." + provinceCode + "." + cityCode + suffix);
return classType;
} /**
* 获取base
*
* @param className
* @return
* @throws Exception
*/
public Class<?> getClassType(String className) throws Exception {
Class<?> classType = Class.forName(className);
return classType;
} /**
* @param classType
* @return
* @throws Exception
*/
public Object getClassInstance(Class<?> classType) throws Exception {
return getClassInstance(classType, null, null);
} /**
* 获取对象client
*
* @param classType
* @param classes
* @param objects
* @return
* @throws Exception
*/
public Object getClassInstance(Class<?> classType, Class[] classes, Object[] objects) throws Exception {
Object client = classType.getConstructor(classes).newInstance(objects);
return client;
} /**
* 执行不带参数的方法
*
* @param classType
* @param instance
* @param method
* @return
* @throws Exception
*/
public Object implementMethod(Class<?> classType, Object instance, String method) throws Exception {
return implementMethod(classType, instance, method, null, null);
} /**
* 执行方法
*
* @param classType
* @param instance
* @param method
* @param paramTypes
* @param params
* @return
* @throws Exception
*/
public Object implementMethod(Class<?> classType, Object instance, String method, Class[] paramTypes, Object[] params) throws Exception {
Method getStrMethod;
Object result;
if (paramTypes == null) {
getStrMethod = classType.getMethod(method);
result = getStrMethod.invoke(instance);
} else {
getStrMethod = classType.getMethod(method, paramTypes);
result = getStrMethod.invoke(instance, params);
}
return result;
}
进一步封装，通过实现接口的形式调用，这样就省略了每次反射方法时还要写上参数类型数组：
package com.lkb.autoCode.util; import com.lkb.autoCode.constant.AutoCodeConstant; import java.lang.reflect.Method; /**
* DefultClassLoader 默认的类加载器
*
* @author Lilin
* @date 2016/5/24
*/
public class DefultClassLoader<T> { private Class<?> classType = null;
private T reflectClass = null; /**
* @param fullClassName 全包路径
* @throws Exception
*/
public DefultClassLoader(String fullClassName) throws Exception {
classType = getClassType(fullClassName);
} /**
* @param type 模板类型
* @param provinceCode 省Id
* @param cityCode 市Id
* @param className 类名称
* @throws Exception
*/
public DefultClassLoader(String type, String provinceCode, String cityCode, String className) throws Exception {
classType = getClassType(type, provinceCode, cityCode, className);
} /**
* 获取classType
*
* @param type
* @param provinceCode
* @param cityCode
* @return
* @throws Exception
*/
public Class<?> getClassType(String type, String provinceCode, String cityCode, String suffix) throws Exception {
Class<?> classType = Class.forName(AutoCodeConstant.BASE_SB_PACKAGE + "." + type + "." + provinceCode + "." + cityCode + suffix);
return classType;
} /**
* 获取base
*
* @param fullClassName
* @return
* @throws Exception
*/
public Class<?> getClassType(String fullClassName) throws Exception {
Class<?> classType = Class.forName(fullClassName);
return classType;
} /**
* 获取对象client
* @return
* @throws Exception
*/
public T getClassInstance() throws Exception {
return getClassInstance(null, null);
} /**
* 获取对象client
*
* @param classes
* @param objects
* @return
* @throws Exception
*/
public T getClassInstance(Class[] classes, Object[] objects) throws Exception {
T client = (T) classType.getConstructor(classes).newInstance(objects);
return client;
} /**
* 执行不带参数的方法(忽略)
*
* @param classType
* @param instance
* @param method
* @return
* @throws Exception
*/
public Object implementMethod(Class<?> classType, Object instance, String method) throws Exception {
return implementMethod(classType, instance, method, null, null);
} /**
* 执行方法（忽略）
*
* @param classType
* @param instance
* @param method
* @param paramTypes
* @param params
* @return
* @throws Exception
*/
public Object implementMethod(Class<?> classType, Object instance, String method, Class[] paramTypes, Object[] params) throws Exception {
Method getStrMethod;
Object result;
if (paramTypes == null) {
getStrMethod = classType.getMethod(method);
result = getStrMethod.invoke(instance);
} else {
getStrMethod = classType.getMethod(method, paramTypes);
result = getStrMethod.invoke(instance, params);
}
return result;
}
}
路漫漫其修远兮！！！
缺点：构造器的创建还得传递参数类型数组