Hibernate的注解

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Hibernate的注解就是我们不要写持久化类的映射文件了，只不过要导入相应的jia包

例如：

package entity;import java.util.HashSet;import java.util.Set;import java.io.Serializable;import javax.persistence.*;@Entitypublic class District implements Serializable {private static final long serialVersionUID = 1L;@Idprivate int id;@Column(name="name")private String name;@OneToMany(mappedBy="district",cascade={CascadeType.ALL})private Set<Street> streets=new HashSet<Street>();public District(){}public District(int id,String name){this.id=id;this.name=name;}public int getId() {return id;}public void setId(int id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public Set<Street> getStreets() {return streets;}public void setStreets(Set<Street> streets) {this.streets = streets;}}

@Id 代表表示列 @Column(name="对应表里列名" @Persister表示不做相应映

这表示表与表之间关联

@OneToMany(mappedBy="district",cascade={CascadeType.ALL})

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