Hibernate查询练习小例子

package yitian.bean; import javax.persistence.Basic; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.Id; import java.util.Objects; @Entity public class Country { private String code; private String name; private String continent; private String region; private double surfaceArea; private Short indepYear; private int population; private Double lifeExpectancy; private Double gnp; private Double gnpOld; private String localName; private String governmentForm; private String headOfState; private Integer capital; private String code2; @Id @Column(name = "Code") public String getCode() { return code; } public void setCode(String code) { this.code = code; } @Basic @Column(name = "Name") public String getName() { return name; } public void setName(String name) { this.name = name; } @Basic @Column(name = "Continent") public String getContinent() { return continent; } public void setContinent(String continent) { this.continent = continent; } @Basic @Column(name = "Region") public String getRegion() { return region; } public void setRegion(String region) { this.region = region; } @Basic @Column(name = "SurfaceArea") public double getSurfaceArea() { return surfaceArea; } public void setSurfaceArea(double surfaceArea) { this.surfaceArea = surfaceArea; } @Basic @Column(name = "IndepYear") public Short getIndepYear() { return indepYear; } public void setIndepYear(Short indepYear) { this.indepYear = indepYear; } @Basic @Column(name = "Population") public int getPopulation() { return population; } public void setPopulation(int population) { this.population = population; } @Basic @Column(name = "LifeExpectancy") public Double getLifeExpectancy() { return lifeExpectancy; } public void setLifeExpectancy(Double lifeExpectancy) { this.lifeExpectancy = lifeExpectancy; } @Basic @Column(name = "GNP") public Double getGnp() { return gnp; } public void setGnp(Double gnp) { this.gnp = gnp; } @Basic @Column(name = "GNPOld") public Double getGnpOld() { return gnpOld; } public void setGnpOld(Double gnpOld) { this.gnpOld = gnpOld; } @Basic @Column(name = "LocalName") public String getLocalName() { return localName; } public void setLocalName(String localName) { this.localName = localName; } @Basic @Column(name = "GovernmentForm") public String getGovernmentForm() { return governmentForm; } public void setGovernmentForm(String governmentForm) { this.governmentForm = governmentForm; } @Basic @Column(name = "HeadOfState") public String getHeadOfState() { return headOfState; } public void setHeadOfState(String headOfState) { this.headOfState = headOfState; } @Basic @Column(name = "Capital") public Integer getCapital() { return capital; } public void setCapital(Integer capital) { this.capital = capital; } @Basic @Column(name = "Code2") public String getCode2() { return code2; } public void setCode2(String code2) { this.code2 = code2; } @Override public boolean equals(Object o) { if (this == o) return true; if (o == null || getClass() != o.getClass()) return false; Country country = (Country) o; return Double.compare(country.surfaceArea, surfaceArea) == 0 && population == country.population && Objects.equals(code, country.code) && Objects.equals(name, country.name) && Objects.equals(continent, country.continent) && Objects.equals(region, country.region) && Objects.equals(indepYear, country.indepYear) && Objects.equals(lifeExpectancy, country.lifeExpectancy) && Objects.equals(gnp, country.gnp) && Objects.equals(gnpOld, country.gnpOld) && Objects.equals(localName, country.localName) && Objects.equals(governmentForm, country.governmentForm) && Objects.equals(headOfState, country.headOfState) && Objects.equals(capital, country.capital) && Objects.equals(code2, country.code2); } @Override public int hashCode() { return Objects.hash(code, name, continent, region, surfaceArea, indepYear, population, lifeExpectancy, gnp, gnpOld, localName, governmentForm, headOfState, capital, code2); } @Override public String toString() { return "Country{" + "code='" + code + '\'' + ", name='" + name + '\'' + ", continent='" + continent + '\'' + ", region='" + region + '\'' + ", surfaceArea=" + surfaceArea + ", indepYear=" + indepYear + ", population=" + population + ", lifeExpectancy=" + lifeExpectancy + ", gnp=" + gnp + ", gnpOld=" + gnpOld + ", localName='" + localName + '\'' + ", governmentForm='" + governmentForm + '\'' + ", headOfState='" + headOfState + '\'' + ", capital=" + capital + ", code2='" + code2 + '\'' + '}'; } }