java 使用JPQL投影进行查询（需要使用构造函数）

Posted 2021-05-08

public List<GoalReport> findAllGoalReports() {
		Query query = em.createQuery("Select new com.pluralsight.model.GoalReport(g.minutes, e.minutes, e.activity)"
				+ "from Goal g, Exercise e where g.id = e.goal.id");
		return query.getResultList();
	}

package com.pluralsight.model;

public class GoalReport {
	private int goalMinutes;
	private int exerciseMinutes;
	private String exerciseActivity;
	
	public GoalReport(int goalMinutes, int exerciseMinutes, String exerciseActivity){
		this.goalMinutes = goalMinutes;
		this.exerciseMinutes = exerciseMinutes;
		this.exerciseActivity = exerciseActivity;
	}
	
	public int getGoalMinutes() {
		return goalMinutes;
	}
	public void setGoalMinutes(int goalMinutes) {
		this.goalMinutes = goalMinutes;
	}
	public int getExerciseMinutes() {
		return exerciseMinutes;
	}
	public void setExerciseMinutes(int exerciseMinutes) {
		this.exerciseMinutes = exerciseMinutes;
	}
	public String getExerciseActivity() {
		return exerciseActivity;
	}
	public void setExerciseActivity(String exerciseActivity) {
		this.exerciseActivity = exerciseActivity;
	}

}