利用动态配置表、反射来动态给Model类添加属性

利用动态配置表、反射来动态给Model类添加属性

1.给model添加对应的映射属性

import com.alibaba.fastjson.JSON;
import com.chinadep.paidan.dataroute.mappingBean.Person;
import lombok.Data;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;import flect.Field;
import java.util.*;@Data
public class ReflectAttrUtil {private static final Logger logger = Logger(ReflectAttrUtil.class);public String source_type;public String case_no;public String origin_case_no;public String origin_id;public String address; //public String level; //public String leve2; //public String leve3; //public String leve4; //public Person person;private static final Map<String, Class<?>> primitiveToWrappers = new HashMap();// 反射动态属性添加Classstatic{primitiveToWrappers.put("boolean", Boolean.class);primitiveToWrappers.put("char", Character.class);primitiveToWrappers.put("double", Double.class);primitiveToWrappers.put("float", Float.class);primitiveToWrappers.put("int", Integer.class);primitiveToWrappers.put("long", Long.class);primitiveToWrappers.put("string", Long.class);primitiveToWrappers.put("list", ArrayList.class);primitiveToWrappers.put("string", String.class);}private final static Class<?> getClassBytype(String type){OrDefault(type, String.class);}/**** 配置表中去除，字段映射关系  attrname->attrtype->mappingname->attrvalue*/private final static HashMap<String, String> map = new HashMap<String, String>() {{put("a1", "source_type");put("a2", "case_no");put("a3", "origin_case_no");put("a4", "origin_id");put("a5", "address");put("a6", "level");put("a7", "leve2");put("a8", "leve3");put("a9", "leve6");}};/**** 组装model* @param object* @param valueMap* @return*/private static Object componentModel(Object object, Map<String, Object> valueMap){// 不存在的属性, 动态添加HashMap addClzMap = new HashMap();HashMap addValMap = new HashMap();for (String key : valueMap.keySet()) {String attrName = (key);try {Field field = Class().getDeclaredField(attrName);// 值为 true 则指示反射的对象在使用时应该取消 Java 语言访问检查。值为 false 则指示反射的对象应该实施 Java 语言访问检查;// 实际上setAccessible是启用和禁用访问安全检查的开关,并不是为true就能访问为false就不能访问 ；// 由于JDK的安全检查耗时较多.所以通过setAccessible(true)的方式关闭安全检查就可以达到提升反射速度的目的 field.setAccessible(true);// 存在的属性映射,直接setvalfield.set(object, (key));} catch (Exception e) {// 原始model中不存在属性，动态添加addClzMap.put(attrName, getClassBytype("string"));addValMap.put(attrName, attrName);logger.info("属性-" + attrName + "不存在");}}//        System.out.println(object);System.out.JSONString(object));System.out.println("---------------------");Object res = null;try {Null(addClzMap)) {// 核心方法dynamicClass() 动态添加属性res = DynamicAttrUtil.dynamicClass(object, addClzMap, addValMap);}}catch (Exception e){e.printStackTrace();}return res;}public static void main(String[] args) {Map<String, Object> map1 = new HashMap<>();map1.put("a1", "a1");map1.put("a2", "a2");map1.put("a3", "a3");map1.put("a4", "a4");map1.put("a5", "a5");map1.put("a6", "a6");map1.put("a7", "a7");map1.put("a8", "a8");map1.put("a9", "a9");ReflectAttrUtil reflectAttrUtil = new ReflectAttrUtil();Person person = new Person();person.setId("personid");person.setName("personname");reflectAttrUtil.setPerson(person);//        Field[] fields = Class().getDeclaredFields();
//        for(Field field : fields) {
//            System.out.Name());
//            System.out.Type());
//            System.out.AnnotatedType());
//            System.out.println("---------------------");
//        }Object res = componentModel(reflectAttrUtil, map1);//        System.out.println(res);System.out.JSONString(res));}}

2.动态添加属性值

import lib.beans.BeanGenerator;
import lib.beans.BeanMap;import java.beans.BeanInfo;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import flect.Method;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;public class DynamicAttrUtil {/**** @param object   旧的对象带值* @param addMap   动态需要添加的属性和属性类型* @param addValMap  动态需要添加的属性和属性值* @return  新的对象* @throws Exception*/public static Object dynamicClass(Object object, HashMap addMap, HashMap addValMap) throws Exception {HashMap returnMap = new HashMap();HashMap typeMap = new HashMap();Class<?> type = Class();BeanInfo beanInfo = BeanInfo(type);PropertyDescriptor[] propertyDescriptors = PropertyDescriptors();for (int i = 0; i < propertyDescriptors.length; i++) {PropertyDescriptor descriptor = propertyDescriptors[i];String propertyName = Name();if (!propertyName.equals("class")) {Method readMethod = ReadMethod();Object result = readMethod.invoke(object);//可以判断为 NULL不赋值returnMap.put(propertyName, result);typeMap.put(propertyName, PropertyType());}}returnMap.putAll(addValMap);typeMap.putAll(addMap);//map转换成实体对象DynamicBean bean = new DynamicBean(typeMap);//赋值Set keys = typeMap.keySet();for (Iterator it = keys.iterator(); it.hasNext(); ) {String key = (String) it.next();bean.setValue(key, (key));}Object obj = Object();return obj;}
}class DynamicBean {private Object object = null; //动态生成的类private BeanMap beanMap = null; //存放属性名称以及属性的类型public DynamicBean() {super();}public DynamicBean(Map propertyMap) {this.object = generateBean(propertyMap);this.beanMap = ate(this.object);}/*** @param propertyMap* @return*/private Object generateBean(Map propertyMap) {BeanGenerator generator = new BeanGenerator();Set keySet = propertyMap.keySet();for (Iterator i = keySet.iterator(); i.hasNext(); ) {String key = (String) i.next();generator.addProperty(key, (Class) (key));}ate();}/*** 给bean属性赋值** @param property 属性名* @param value    值*/public void setValue(Object property, Object value) {beanMap.put(property, value);}/*** 通过属性名得到属性值** @param property 属性名* @return 值*/public Object getValue(String property) {(property);}/*** 得到该实体bean对象** @return*/public Object getObject() {return this.object;}
}