環境
OS:windows7
開発ツール:STS-3.9.4
Spring:4.0.0
問題
Criteria APIを利用して、データベースのデータを全件取得する処理を書いていますが、
MyPersonDataDaoImpl.javaのgetAllEntity()の☆マークのあたりで
「型パラメーター MyPersonData のクラス・リテラルが正しくありません」というエラーが出てしまいます。
どれだけ調べても、以下の記述が正しそうなので解決法がわかりません。
ぜひ、ご教授よろしくお願い致します。
問題のソースコード
MyPersonDataServlet.java(サーブレット)
package jp.tuyano.spring.data1; import java.io.IOException; import java.util.List; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.beans.factory.annotation.Autowired; /** * Servlet implementation class MyPersonDataServlet */ public class MyPersonDataServlet extends BeanAutoWiringFilterServlet { private static final long serialVersionUID = 1L; @Autowired private MyPersonDataDaoImpl dao; /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { List<MyPersonData> list = dao.getAllEntity(); request.setAttribute("entities", list); request.getRequestDispatcher("/index.jsp").forward(request, response); } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String name = request.getParameter("name"); String mail = request.getParameter("mail"); List<MyPersonData> list = repository.findByNameLikeOrMailLike("%" + name + "%", "%" + mail + "%"); request.setAttribute("entities", list); request.getRequestDispatcher("/index.jsp").forward(request, response); } }
MyPersonDataDaoImpl.java
package jp.tuyano.spring.data1; import java.util.List; import javax.persistence.EntityManager; import javax.persistence.EntityTransaction; import javax.persistence.PersistenceContext; import javax.persistence.Query; import javax.persistence.criteria.CriteriaBuilder; import javax.persistence.criteria.CriteriaQuery; import javax.persistence.criteria.Root; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.context.ApplicationContext; import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean; import org.springframework.stereotype.Service; import jp.tuyano.spring.data1.MyPersonData; @Service public class MyPersonDataDaoImpl<MyPersonData> extends AbstractMyPersonDataDao { private static final int MyPersonData = 0; @Autowired private ApplicationContext context; @Autowired private LocalContainerEntityManagerFactoryBean factory; @PersistenceContext private EntityManager manager; public MyPersonDataDaoImpl() { init(); } public List<MyPersonData> getAllEntity() { CriteriaBuilder builder = manager.getCriteriaBuilder(); CriteriaQuery<MyPersonData> query = builder.createQuery(MyPersonData.class); //☆ここでエラー Root<MyPersonData> root = query.from(MyPersonData.class);//☆ここでもエラー query.select(root); List<MyPersonData> list = (List<MyPersonData>)manager.createQuery(query).getResultList(); return list; } public List<MyPersonData> findByField(String field, String find) { Query query = manager.createQuery("from MyPersonData where " + field + " = '" + find + "'"); return query.getResultList(); } public void addEntity(Object entity) { EntityManager manager = factory.getNativeEntityManagerFactory().createEntityManager(); EntityTransaction transaction = manager.getTransaction(); transaction.begin(); manager.persist(entity); System.out.println("add:" + entity); manager.flush(); transaction.commit(); } public void updateEntity(Object entity) { EntityManager manager = factory.getNativeEntityManagerFactory().createEntityManager(); EntityTransaction transaction = manager.getTransaction(); transaction.begin(); manager.merge(entity); manager.flush(); transaction.commit(); } public void removeEntity(Object data) { EntityManager manager = factory.getNativeEntityManagerFactory().createEntityManager(); EntityTransaction transaction = manager.getTransaction(); transaction.begin(); manager.remove(data); manager.flush(); transaction.commit(); } public void removeEntity(Long id) { jp.tuyano.spring.data1.MyPersonData entity = manager.find(jp.tuyano.spring.data1.MyPersonData.class, 1L); this.removeEntity(entity); //dao.removeEntity(entity) } }
MyPersonData.java
package jp.tuyano.spring.data1; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; import javax.persistence.Table; @Entity @Table(name="mypersondata") public class MyPersonData { @Id @Column @GeneratedValue(strategy = GenerationType.AUTO) private long id; @Column(length=50, nullable=false) private String name; @Column(length=100, nullable=true) private String mail; @Column(nullable=true) private int age; public MyPersonData() {} public MyPersonData(String name, String mail, int age) { this(); this.name = name; this.mail = mail; this.age = age; } public long getId() { return id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getMail() { return mail; } public void setMail(String mail) { this.mail = mail; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } @Override public String toString() { return "MyPersonData [id=" + id + ", name=" + name + ", mail=" + mail + ", age=" + age + "]"; } }
やってみたこと
MyPersonDataDaoImpl.javaで以下の記述をして見ましたが、同じエラーがでました。
そもそもSpringの問題ではなく、Javaの問題かと感じています。
Class<MyPersonData> myPersonDataClass = MyPersonData.class;
参考にしたURL
https://waman.hatenablog.com/entry/20101003/1286102501
http://enterprisegeeks.hatenablog.com/entry/2015/03/16/075859
https://docs.oracle.com/javaee/6/api/javax/persistence/criteria/CriteriaQuery.html
https://docs.oracle.com/javaee/6/api/javax/persistence/criteria/Root.html