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Spring 如何注入此类类功能。春季公开赛_Spring_Jakarta Ee_Struts2_Dependency Injection_Openjpa Maven Plugin - Fatal编程技术网

Spring 如何注入此类类功能。春季公开赛

Spring 如何注入此类类功能。春季公开赛,spring,jakarta-ee,struts2,dependency-injection,openjpa-maven-plugin,Spring,Jakarta Ee,Struts2,Dependency Injection,Openjpa Maven Plugin,如何在这种语句中注入类UserProfile?这是使用Struts2-Spring插件 (UserProfile UserProfile=em.find(UserProfile.class,“1”);)——>我不知道如何在spring中更改这个for injection样式 package tester; /** * * @author god-gavedmework */ import javax.persistence.EntityManager; import javax.pe

如何在这种语句中注入类UserProfile?这是使用Struts2-Spring插件

(UserProfile UserProfile=em.find(UserProfile.class,“1”);)——>我不知道如何在spring中更改这个for injection样式

package tester;

/**
 *
 * @author god-gavedmework
 */


import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.EntityTransaction;
import javax.persistence.Persistence;
import lotmovement.business.entity.UserProfile;



/**
 *
 * @author god-gavedmework
 */
public class Record_exist {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {

        EntityManagerFactory entityManagerFactory = 
        Persistence.createEntityManagerFactory("LotMovementPU");

        EntityManager em = entityManagerFactory.createEntityManager();

        EntityTransaction userTransaction = em.getTransaction();
        userTransaction.begin();
        UserProfile userProfile = em.find(UserProfile.class,"1");

        if(userProfile.getUserId().equals("tok"))
        {
            System.out.println("find");
            System.out.println("write successful");
        }


        entityManagerFactory.close();


    }
}
我的弹簧注射不起作用。 我已经使用setter注入了UserProfile实体,但我认为存在一个问题,因为它无法检索任何数据

private UserProfile userProfile; --> it does inject.

entityStart.em.find(UserProfile.class, userId)--> will not work in the sense that no values are retrieved.
全班

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package lotmovement.business.crud;

import lotmovement.business.entity.UserProfile;

/**
 *
 * @author god-gavedmework
 */
public class RecordExistUserProfile {

    private EntityStart entityStart;
    private UserProfile userProfile;


    public boolean checkrecordexist(String userId) {
        entityStart.StartDbaseConnection();
        entityStart.em.find(UserProfile.class, userId); ---> this one will not work.

        if (userId.equals(userProfile.getUserId())) {
            return true;
        } else {
            return false;
        }
    }

    public boolean CheckPasswordCorrect(String userId, String password) {
        entityStart.StartDbaseConnection();

        UserProfile up = entityStart.em.find(UserProfile.class, userId); --> this one will work but it is not injected...


        if (password.equals(up.getPassword())) {
            return true;
        } else {
            return false;
        }

    }



    public UserProfile getUserProfile() {
        return userProfile;
    }

    public void setUserProfile(UserProfile userProfile) {
        this.userProfile = userProfile;
    }

    public EntityStart getEntityStart() {
        return entityStart;
    }

    public void setEntityStart(EntityStart entityStart) {
        this.entityStart = entityStart;
    }



}

最后我找到了问题的根本原因和解决办法

根本原因:

UserProfile UserProfile;-->它将注入UserProfile实体

entityStart.em.find(UserProfile.class,userId);-->这将不起作用,因为未将其传递给类变量userProfile

解决方案:

UserProfile UserProfile;-->注入UserProfile实体


userProfile=entityStart.em.find(userProfile.class,userId);-->find()现在可以使用find。

您到底想注入什么以及注入到哪里?而不是这样做:UserProfile up=entityStart.em.find(UserProfile.class,userId);在srping中应该做什么@aleksandr M你希望它是什么?你到底想注射什么!?为了脱钩。。这就是我在这个程序中使用spring的原因。。。。或者可能我没有得到它?我试图通过这个注入实体用户配置文件。但是,此代码不起作用。entityStart.em.find(UserProfile.class,userId);原始代码是:UserProfile UserProfile=em.find(UserProfile.class,userId)@Aleksandr M你现在明白了吗?