BeanUtils.copyProperties()方法的使用

在Java中如果要将一个对象的值赋给另外一个对象，那么使用BeanUtils.copyProperties方法是极其方便的。下面介绍简单使用方法。
例：有两个类Emp和EmpVo，要将Emp对象的值赋给EmpVo对象（注意：只能对两个对象的相同属性进行赋值，如果某个属性只有EmpVo类包含，赋值后EmpVo该属性的值依然为空）。
Emp类：

public class Emp {
    private String id;
    
    private String empname;
    
    private BigDecimal salary;
    
    private Date birth;
    
    private Integer age;
    
    private Integer depID;
    
    public String getId() {
        return id;
    }
    
    public void setId(String id) {
        this.id = id == null ? null : id.trim();
    }
    
    public String getEmpname() {
        return empname;
    }
    
    public void setEmpname(String empname) {
        this.empname = empname == null ? null : empname.trim();
    }
    
    public BigDecimal getSalary() {
        return salary;
    }
    
    public void setSalary(BigDecimal salary) {
        this.salary = salary;
    }
    
    public Date getBirth() {
        return birth;
    }
    
    public void setBirth(Date birth) {
        this.birth = birth;
    }
    
    public Integer getAge() {
        return age;
    }
    
    public void setAge(Integer age) {
        this.age = age;
    }
    
    public Integer getDepID() {
        return depID;
    }
    
    public void setDepID(Integer depID) {
        this.depID = depID;
    }
}

EmpVo类：

public class EmpVo {
    private String id;
    
    private String empname;
    
    private BigDecimal salary;
    
    private Date birth;
    
    private Integer age;
    
    private Integer depID;
    
    private String depName;
    
    public EmpVo() {
    }
    
    public EmpVo(String id, String empname, BigDecimal salary, Date birth, Integer age, Integer depID, String depName) {
        this.id = id;
        this.empname = empname;
        this.salary = salary;
        this.birth = birth;
        this.age = age;
        this.depID = depID;
        this.depName = depName;
    }
    
    public String getId() {
        return id;
    }
    
    public void setId(String id) {
        this.id = id;
    }
    
    public String getEmpname() {
        return empname;
    }
    
    public void setEmpname(String empname) {
        this.empname = empname;
    }
    
    public BigDecimal getSalary() {
        return salary;
    }
    
    public void setSalary(BigDecimal salary) {
        this.salary = salary;
    }
    
    public Date getBirth() {
        return birth;
    }
    
    public void setBirth(Date birth) {
        this.birth = birth;
    }
    
    public Integer getAge() {
        return age;
    }
    
    public void setAge(Integer age) {
        this.age = age;
    }
    
    public Integer getDepID() {
        return depID;
    }
    
    public void setDepID(Integer depID) {
        this.depID = depID;
    }
    
    public String getDepName() {
        return depName;
    }
    
    public void setDepName(String depName) {
        this.depName = depName;
    }
}

测试类：

public class Demo
{
    public void test(){
        Emp emp=new Employee();
        EmpVo empVo=new EmpVo ();
        BeanUtil.copyProperties(emp, empVo);
    }
}

这样就可以将Emp对象的值赋给EmpVo了。

理想和现实总是有差距的，幸好有差距，不然，谁还稀罕理想。