注解联合主键

package com.lyis.entity;import java.io.Serializable;import javax.persistence.Column;/** * 用户角色关联信息 * * @author Johnson * @version Tuesday March 15th, 2011 */public class RUserRoleId implements Serializable {private static final long serialVersionUID = 1L;private Long userId;private Long roleId;public RUserRoleId() {}public RUserRoleId(Long userId, Long roleId) {this.userId = userId;this.roleId = roleId;}/** * 用户编号 * * @return */@Column(name = "I_USERID", precision = 20, nullable = false)public Long getUserId() {return userId;}public void setUserId(Long userId) {this.userId = userId;}/** * 角色编号 * * @return */@Column(name = "I_ROLEID", precision = 20, nullable = false)public Long getRoleId() {return roleId;}public void setRoleId(Long roleId) {this.roleId = roleId;}} 

package com.lyis.entity;import java.io.Serializable;import javax.persistence.EmbeddedId;import javax.persistence.Entity;import javax.persistence.Table;/** * 用户角色关联信息 * * @author Johnson * @version Tuesday March 15th, 2011 */@Entity@Table(name = "R_USER_ROLE")public class RUserRole implements Serializable {private static final long serialVersionUID = 1L;private RUserRoleId id;public RUserRole() {}public RUserRole(RUserRoleId id) {this.id = id;}/** * 联合主键 * * @return */@EmbeddedIdpublic RUserRoleId getId() {return id;}public void setId(RUserRoleId id) {this.id = id;}}