在最原始的ssh開發中Hibernate須要配置hbm.xml實體映射文件,遇到表較多及表關係複雜時極其麻煩;java
如今通常都會經過JAR包中的配置好的註解代替原來的這種配置:app
在beans.xml配置文件(applicationContext.xml)中將ssh
<property name="mappingResources">
<list>
<value>cw/test/bean/Employee.hbm.xml</value>
</list>
</property>this
的映射關係刪除,改爲:.net
<property name="annotatedClasses">
<list><value>cw.test.bean.Employee</value></list>
</property>code
其中cw.test.bean.Employee爲實體類xml
具體的實體類改爲以下形式,加入註解:blog
@Entity @Table(name="employee") public class Employee implements java.io.Serializable{ @Id @Column(name="username") private String username; @Column(name="password") private String password; @Enumerated(EnumType.STRING) private Gender gender = Gender.MAN; public Employee(){} public Employee(String username, String password){ this.username = username; this.password = password; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public Gender getGender() { return gender; } public void setGender(Gender gender) { this.gender = gender; } }
須要注意的是若是某個字段是用的枚舉類型,那麼須要用到Enumerated註解,而且在實體類上要實現java.io.Serializable類。
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引用:https://blog.csdn.net/cw370008359/article/details/41720275 開發