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實體對象之間相互傳值，如：VO對象的值賦給Entity對象，是代碼中常用功能，如果通過get、set相互賦值，則很麻煩，借助工具類BeanUtils可以輕松地完成操作。

BeanUtils依賴包導(dǎo)入

BeanUtils 是 Apache commons組件的成員之一，主要用于簡化JavaBean封裝數(shù)據(jù)的操作。使用BeanUtils必須導(dǎo)入相應(yīng)的jar包，BeanUtils的maven坐標(biāo)為

				?

									<dependency>

									    <groupId>commons-beanutils</groupId>

									    <artifactId>commons-beanutils</artifactId>

									    <version>1.9.4</version>

									</dependency>

示例

將前端傳來的學(xué)生排名信息（StudentVo對象）分別賦給學(xué)生對象（StudentEntity）和排名對象（RankingEntity），這三個類代碼如下：

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									@Data

									public class StudentVo {

									    private String sno;

									    private String sname;

									    private Integer ranking;

									    private String schoolTerm;

									    public String toString(){

									        return "studentVo對象的值  sno:"+getSno()+" sname:"+getSname()+" ranking:"+getRanking().toString()+" schoolTerm:"+getSchoolTerm();

									    }

									}

									@Data

									public class StudentEntity {

									    private String sno;

									    private String sname;

									    private Integer sage;

									    public String toString(){

									        return "studentEntity對象的值 sno:"+getSno()+" sname:"+getSname()+" sage:"+getSage();

									    }

									}

									@Data

									public class RankingEntity {

									    private String sno;

									    private Integer ranking;

									    private String schoolTerm;

									    public String toString(){

									        return "rankingEntity對象的值 學(xué)號："+getSno()+" 名次："+getRanking().toString()+" 學(xué)期："+getSchoolTerm();

									    }

									}

將VO對象的值賦給實體對象，通過BeanUtils.copyProperties(目標(biāo),源)，將源實體對象的數(shù)據(jù)賦給目標(biāo)對象，只把屬性名相同的數(shù)據(jù)賦值，目標(biāo)中的屬性如果在源中不存在，給null值，測試代碼如下：

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									public class App 

									{

									    public static void main( String[] args ) throws InvocationTargetException, IllegalAccessException {

									        StudentVo studentVo = new StudentVo();

									        studentVo.setSno("1");

									        studentVo.setRanking(20);

									        studentVo.setSname("胡成");

									        studentVo.setSchoolTerm("第三學(xué)期");

									        System.out.println(studentVo.toString());

									        StudentEntity studentEntity = new StudentEntity();

									        BeanUtils.copyProperties(studentEntity,studentVo);

									        System.out.println(studentEntity.toString());

									        RankingEntity rankingEntity = new RankingEntity();

									        BeanUtils.copyProperties(rankingEntity,studentVo);

									        System.out.println(rankingEntity.toString());

									    }

									}