BeanUtils.copyProperties()-个人总结

实体类

package com.zdc.entity;import java.math.BigDecimal;import java.util.Date;public class Employee {private String id;private String name;private Date birthday;private Integer age;private Boolean gender;private Double  myDouble;private Short myShort;private char mychar;private float myfloat;private Object myObj;private Date myDate;private BigDecimal myBigDecimal;public Employee(){}@Overridepublic String toString() {return "Employee [id=" + id + ", name=" + name + ", birthday="+ birthday + ", age=" + age + ", gender=" + gender+ ", myDouble=" + myDouble + ", myShort=" + myShort+ ", mychar=" + mychar + ", myfloat=" + myfloat + ", myObj="+ myObj + ", myDate=" + myDate + ", myBigDecimal="+ myBigDecimal + "]";}public Employee(String id, String name, Date birthday, Integer age,Boolean gender, Double myDouble, Short myShort) {super();this.id = id;this.name = name;this.birthday = birthday;this.age = age;this.gender = gender;this.myDouble = myDouble;this.myShort = myShort;}public String getId() {return id;}public void setId(String id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public Date getBirthday() {return birthday;}public void setBirthday(Date birthday) {this.birthday = birthday;}public Integer getAge() {return age;}public void setAge(Integer age) {this.age = age;}public Boolean getGender() {return gender;}public void setGender(Boolean gender) {this.gender = gender;}public Double getMyDouble() {return myDouble;}public void setMyDouble(Double myDouble) {this.myDouble = myDouble;}public Short getMyShort() {return myShort;}public void setMyShort(Short myShort) {this.myShort = myShort;}public char getMychar() {return mychar;}public void setMychar(char mychar) {this.mychar = mychar;}public float getMyfloat() {return myfloat;}public void setMyfloat(float myfloat) {this.myfloat = myfloat;}public Object getMyObj() {return myObj;}public void setMyObj(Object myObj) {this.myObj = myObj;}public Date getMyDate() {return myDate;}public void setMyDate(Date myDate) {this.myDate = myDate;}public BigDecimal getMyBigDecimal() {return myBigDecimal;}public void setMyBigDecimal(BigDecimal myBigDecimal) {this.myBigDecimal = myBigDecimal;}}

Srping 测试 和总结

package com.zdc.test;import java.lang.reflect.InvocationTargetException;import java.util.Date;import org.apache.commons.beanutils.PropertyUtils;import org.springframework.beans.BeanUtils;import com.zdc.entity.Employee;/** * 关于使用BeanUtils.copyProperties 的总结 *  1. 引入的包不同，使用方法不同 *        提供BeanUtils包 本人暂时知道的有两个 ： Spring提供 和 apache 提供 *        Spring提供的 BeanUtils 不需要考虑空值问题 *        apache 提供的需要考虑空值  尤其是 java.util.Date,   java.math.BigDecimal 等类型。如果是空值得话，就会抛出异常 *         因此需要 使用BeanUtilsBean 进行转换处理 *  2. BeanUtils.copyProperties(这里指的是apache 提供的)    与 PropertyUtils.copyProperties() 比较 *             PropertyUtils.copyProperties()  仅仅对属性和名称进行转换  ，如果类型匹配不成功，就会抛出异常 *             效率方面 PropertyUtils.copyProperties()  的效率要比 BeanUtils.copyProperties() 强的多 *  3.灵活度上，个人认为apache 提供的稍微好一点，只要继承BeanUtilsBean 就可以实现对一般需要的处理 *         *          *          * @author  * */public class copyBeanUtilsBySpring {public static void main(String[] args) {Employee sourceEmployee=new Employee("122", "zhangsan",new Date(), 23, true, 3.3, (short)1);Employee newEmployee=new Employee();Employee propertyUtilsEmployee=new Employee();BeanUtils.copyProperties(sourceEmployee, newEmployee);System.out.println(newEmployee.toString());try {PropertyUtils.copyProperties(propertyUtilsEmployee, sourceEmployee);System.out.println(propertyUtilsEmployee.toString());} catch (IllegalAccessException | InvocationTargetException| NoSuchMethodException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}

apache提供

package com.zdc.test;import java.lang.reflect.InvocationTargetException;import java.math.BigDecimal;import java.util.Date;import org.apache.commons.beanutils.BeanUtilsBean;import com.zdc.entity.Employee;public class copyJavaBean { public static void main(String[] args) {Employee sourceEmployee=new Employee("122", "zuodengchao",new Date(), 23, true, 3.3, (short)1);Employee newEmployee=new Employee();BeanUtilsBean beanUtils=new BeanUtilsBean();beanUtils.getConvertUtils().register(new org.apache.commons.beanutils .converters.BigDecimalConverter(null),  BigDecimal.class);beanUtils.getConvertUtils().register(new org.apache.commons.beanutils.converters.DateConverter(null),            java.util.Date.class);try {beanUtils.copyProperties(newEmployee, sourceEmployee);} catch (IllegalAccessException | InvocationTargetException e) {// TODO Auto-generated catch blocke.printStackTrace();}System.out.println(newEmployee.toString());System.out.println("执行成功");}}