动态生成类属性
package com.hisense.smartroad.saf.educatiotraining.test;
import java.util.Map;
import net.sf.cglib.beans.BeanGenerator;
import net.sf.cglib.beans.BeanMap;
public class DynamicBean {
/**
* 目标对象
*/
private Object target;
/**
* 属性集合
*/
private BeanMap beanMap;
public DynamicBean(Class superclass, Map<String, Class> propertyMap){
this.target = generateBean(superclass, propertyMap);
this.beanMap = BeanMap.create(this.target);
}
/**
* bean 添加属性和值
*
* @param property
* @param value
*/
public void setValue(String property, Object value) {
beanMap.put(property, value);
}
/**
* 获取属性值
*
* @param property
* @return
*/
public Object getValue(String property) {
return beanMap.get(property);
}
/**
* 获取对象
*
* @return
*/
public Object getTarget() {
return this.target;
}
/**
* 根据属性生成对象
*
* @param superclass
* @param propertyMap
* @return
*/
private Object generateBean(Class superclass, Map<String, Class> propertyMap) {
BeanGenerator generator = new BeanGenerator();
if (null != superclass) {
generator.setSuperclass(superclass);
}
BeanGenerator.addProperties(generator, propertyMap);
return generator.create();
}
}
package com.hisense.smartroad.saf.educatiotraining.test;
import java.beans.PropertyDescriptor;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import org.apache.commons.beanutils.PropertyUtilsBean;
/**
* @className:ReflectUtil
* @description:动态生成类的属性、并且赋值
* @date:2018年4月3日 下午2:33:10
*/
public class ReflectUtil {
@SuppressWarnings("rawtypes")
public static Object getTarget(Object dest, Map<String, Object> addProperties) {
PropertyUtilsBean propertyUtilsBean = new PropertyUtilsBean();
PropertyDescriptor[] descriptors = propertyUtilsBean.getPropertyDescriptors(dest);
Map<String, Class> propertyMap = new HashMap<String, Class>();
for (PropertyDescriptor d : descriptors) {
if (!"class".equalsIgnoreCase(d.getName())) {
propertyMap.put(d.getName(), d.getPropertyType());
}
}
// add extra properties
Set<Entry<String, Object>> entrySet = addProperties.entrySet();
for (Entry<String, Object> entry : entrySet) {
propertyMap.put(entry.getKey(),entry.getValue().getClass());
}
// new dynamic bean
DynamicBean dynamicBean = new DynamicBean(dest.getClass(), propertyMap);
for (Entry<String, Class> entry : propertyMap.entrySet()) {
try {
if (!addProperties.containsKey(entry.getKey())) {
dynamicBean.setValue(entry.getKey(), propertyUtilsBean.getNestedProperty(dest, entry.getKey()));
}
} catch (Exception e) {
}
}
for (Entry<String, Object> entry : addProperties.entrySet()) {
dynamicBean.setValue(entry.getKey(), entry.getValue());
}
Object target = dynamicBean.getTarget();
return target;
}
public static void main(String[] args) {
TestClazz entity = new TestClazz();
Map<String, Object> addProperties = new HashMap<String,Object>();
addProperties.put("day31", "aa");
addProperties.put("day30", "bb");
addProperties.put("day29", "cc");
addProperties.put("day28", "dd");
addProperties.put("day27", "ee");
TestClazz newVo = (TestClazz) getTarget(entity, addProperties);
System.out.println(newVo);
}
}