Spring Data Jpa 查詢返回自定義對象

轉載請注明出處：http://www.wangyongkui.com/java-jpa-query。

今天使用Jpa遇到一個問題，發現查詢多個字段時返回對象不能自動轉換成自定義對象。代碼如下：

//User 實體對象
@Entity
@Table(name="t_user")
public class User {
    private Integer id;
    private String name;
    public Integer getId() {
        return id;
    }
    public void setId(Integer id) {
        this.id = id;
    }
    public Strng getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
}

package com.project.user.dto
//查詢返回對象
public class UserDto{
    private Integer count;
    private String name;
    public UserDto(Integer count, String name) {
        this.count = count;
        this.name = name;
    }
    public Integer getCount() {
        return count;
    }
    public void setCount(Integer count) {
        this.count = count;
    }
    public Strng getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
}

好了，這回查詢直接返回的就是UserDto對象了。