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网站信息报送制度建设,群晖中使用wordpress,宜春建设局官方网站,wordpress登录qqJPA教程 - JPA查询日期参数示例 我们可以在查询中使用日期类型值。 以下代码使用EntityManager创建具有两个参数的查询。 然后它传递两个日期类型值。 em.createQuery(SELECT e FROM Professor e WHERE e.startDate BETWEEN :start AND :en…JPA教程 - JPA查询日期参数示例 我们可以在查询中使用日期类型值。 以下代码使用EntityManager创建具有两个参数的查询。 然后它传递两个日期类型值。 em.createQuery(SELECT e FROM Professor e WHERE e.startDate BETWEEN :start AND :end).setParameter(start, new Date(), TemporalType.DATE).setParameter(end, new Date(), TemporalType.DATE).getResultList();例子 以下代码来自Professor.java。 package cn.w3cschool.common;import java.util.ArrayList; import java.util.Collection; import java.util.Date;import javax.persistence.Entity; import javax.persistence.Id; import javax.persistence.ManyToMany; import javax.persistence.ManyToOne; import javax.persistence.NamedNativeQuery; import javax.persistence.OneToMany; import javax.persistence.OneToOne; import javax.persistence.Table; import javax.persistence.Temporal; import javax.persistence.TemporalType;Entity Table(name EMP) public class Professor {Idprivate int id;private String name;private long salary;Temporal(TemporalType.DATE)private Date startDate;OneToOneprivate Address address;OneToMany(mappedByemployee)private CollectionPhone phones new ArrayListPhone();ManyToOneprivate Department department;ManyToOneprivate Professor manager;OneToMany(mappedBymanager)private CollectionProfessor directs new ArrayListProfessor();ManyToMany(mappedByemployees)private CollectionProject projects new ArrayListProject();public int getId() {return id;}public void setId(int empNo) {this.id empNo;}public String getName() {return name;}public void setName(String name) {this.name name;}public long getSalary() {return salary;}public void setSalary(long salary) {this.salary salary;}public Date getStartDate() {return startDate;}public void setStartDate(Date startDate) {this.startDate startDate;}public CollectionPhone getPhones() {return phones;}public void addPhone(Phone phone) {if (!getPhones().contains(phone)) {getPhones().add(phone);if (phone.getProfessor() ! null) {phone.getProfessor().getPhones().remove(phone);}phone.setProfessor(this);}}public Department getDepartment() {return department;}public void setDepartment(Department department) {if (this.department ! null) {this.department.getProfessors().remove(this);}this.department department;this.department.getProfessors().add(this);}public CollectionProfessor getDirects() {return directs;}public void addDirect(Professor employee) {if (!getDirects().contains(employee)) {getDirects().add(employee);if (employee.getManager() ! null) {employee.getManager().getDirects().remove(employee);}employee.setManager(this);}}public Professor getManager() {return manager;}public void setManager(Professor manager) {this.manager manager;}public CollectionProject getProjects() {return projects;}public void addProject(Project project) {if (!getProjects().contains(project)) {getProjects().add(project);}if (!project.getProfessors().contains(this)) {project.getProfessors().add(this);}}public Address getAddress() {return address;}public void setAddress(Address address) {this.address address; }public String toString() {return Professor getId() : name: getName() , salary: getSalary() , phones: getPhones() , managerNo: ((getManager() null) ? null : getManager().getId()) , deptNo: ((getDepartment() null) ? null : getDepartment().getId());}}以下代码来自Project.java。 package cn.w3cschool.common;import java.util.ArrayList; import java.util.Collection;import javax.persistence.Entity; import javax.persistence.Id; import javax.persistence.Inheritance; import javax.persistence.ManyToMany;Entity Inheritance public class Project {Idprotected int id;protected String name;ManyToManyprotected CollectionProfessor employees new ArrayListProfessor();public int getId() {return id;}public void setId(int projectNo) {this.id projectNo;}public String getName() {return name;}public void setName(String projectName) {this.name projectName;}public CollectionProfessor getProfessors() {return employees;}public void addProfessor(Professor employee) {if (!getProfessors().contains(employee)) {getProfessors().add(employee);}if (!employee.getProjects().contains(this)) {employee.getProjects().add(this);}}public String toString() {return getClass().getName().substring(getClass().getName().lastIndexOf(.)1) no: getId() , name: getName();} }下面的代码来自Department.java。 package cn.w3cschool.common;import java.util.HashSet; import java.util.Set;import javax.persistence.Entity; import javax.persistence.Id; import javax.persistence.OneToMany;Entity public class Department {Idprivate int id;private String name;OneToMany(mappedBydepartment)private SetProfessor employees new HashSetProfessor();public int getId() {return id;}public void setId(int deptNo) {this.id deptNo;}public String getName() {return name;}public void setName(String deptName) {this.name deptName;}public SetProfessor getProfessors() {return employees;}public String toString() {return Department no: getId() , name: getName();} }以下代码来自Phone.java。 package cn.w3cschool.common;import javax.persistence.Entity; import javax.persistence.Id; import javax.persistence.ManyToOne;Entity public class Phone {Idprivate long id;private String number;private String type;ManyToOneProfessor employee;public long getId() {return id;}public void setId(long id) {this.id id;}public String getNumber() {return number;}public void setNumber(String phoneNo) {this.number phoneNo;}public String getType() {return type;}public void setType(String phoneType) {this.type phoneType;}public Professor getProfessor() {return employee;}public void setProfessor(Professor employee) {this.employee employee;}public String toString() {return Phone id: getId() , no: getNumber() , type: getType();} }以下代码来自Address.java。 package cn.w3cschool.common;import javax.persistence.Entity; import javax.persistence.Id;Entity public class Address {Idprivate int id;private String street;private String city;private String state;private String zip;public int getId() {return id;}public void setId(int id) {this.id id;}public String getStreet() {return street;}public void setStreet(String address) {this.street address;}public String getCity() {return city;}public void setCity(String city) {this.city city;}public String getState() {return state;}public void setState(String state) {this.state state;}public String getZip() {return zip;}public void setZip(String zip) {this.zip zip;}public String toString() {return Address id: getId() , street: getStreet() , city: getCity() , state: getState() , zip: getZip();}}下面的代码来自PersonDaoImpl.java。 package cn.w3cschool.common;import java.util.Collection; import java.util.Date; import java.util.Iterator;import javax.persistence.EntityManager; import javax.persistence.PersistenceContext; import javax.persistence.TemporalType;import org.springframework.transaction.annotation.Transactional;Transactional public class PersonDaoImpl {public void test() {prepareData();CollectionProfessor c em.createQuery(SELECT e FROM Professor e WHERE e.startDate BETWEEN :start AND :end).setParameter(start, new Date(), TemporalType.DATE).setParameter(end, new Date(), TemporalType.DATE).getResultList();for (Iterator i c.iterator(); i.hasNext();) {Professor u (Professor) i.next();printResult(u);}}private void prepareData() {Address address new Address();address.setState(BC);Professor p new Professor();p.setId(0);p.setName(TOM);p.setSalary(1111L);p.setAddress(address);Department d new Department();d.setId(1);d.setName(Design);p.setDepartment(d);d.getProfessors().add(p);Phone phone new Phone();phone.setId(1);phone.setNumber(111-111-1111);phone.setProfessor(p);em.persist(p);em.persist(phone);em.persist(address);em.persist(d);}private static void printResult(Object result) {if (result null) {System.out.print(NULL);} else if (result instanceof Object[]) {Object[] row (Object[]) result;System.out.print([);for (int i 0; i row.length; i) {printResult(row[i]);}System.out.print(]);} else if (result instanceof Long || result instanceof Double|| result instanceof String) {System.out.print(result.getClass().getName() : result);} else {System.out.print(result);}System.out.println();}PersistenceContextprivate EntityManager em; }下载 Query_Date_Parameters.zip 以下是数据库转储。 Table Name: ADDRESSRow:Column Name: ID,Column Type: INTEGER:Column Value: 0Column Name: CITY,Column Type: VARCHAR:Column Value: nullColumn Name: STATE,Column Type: VARCHAR:Column Value: BCColumn Name: STREET,Column Type: VARCHAR:Column Value: nullColumn Name: ZIP,Column Type: VARCHAR:Column Value: nullTable Name: DEPARTMENTRow:Column Name: ID,Column Type: INTEGER:Column Value: 1Column Name: NAME,Column Type: VARCHAR:Column Value: DesignTable Name: EMPRow:Column Name: ID,Column Type: INTEGER:Column Value: 0Column Name: NAME,Column Type: VARCHAR:Column Value: TOMColumn Name: SALARY,Column Type: BIGINT:Column Value: 1111Column Name: STARTDATE,Column Type: DATE:Column Value: nullColumn Name: ADDRESS_ID,Column Type: INTEGER:Column Value: 0Column Name: DEPARTMENT_ID,Column Type: INTEGER:Column Value: 1Column Name: MANAGER_ID,Column Type: INTEGER:Column Value: nullTable Name: PHONERow:Column Name: ID,Column Type: BIGINT:Column Value: 1Column Name: NUMBER,Column Type: VARCHAR:Column Value: 111-111-1111Column Name: TYPE,Column Type: VARCHAR:Column Value: nullColumn Name: EMPLOYEE_ID,Column Type: INTEGER:Column Value: 0Table Name: PROJECTTable Name: PROJECT_EMP