mybatis 3 -枚举

定义枚举：

public static enum AppStateEnum 
    {
        Valid("有效"), Virtual("虚拟"), Hide("隐藏");

        public String toString() {
            return this.appState;
        }
        

        private String appState;

        private AppStateEnum(String str) {
            this.appState = str;
        }
    }

实体：

public class SysApp {
    
     public int getAppId() {
        return appId;
    }
    public void setAppId(int appId) {
        this.appId = appId;
    }
    public String getAppName() {
        return appName;
    }
    public void setAppName(String appName) {
        this.appName = appName;
    }
    public String getAppCode() {
        return appCode;
    }
    public void setAppCode(String appCode) {
        this.appCode = appCode;
    }
    public int getSorting() {
        return sorting;
    }
    public void setSorting(int sorting) {
        sorting = sorting;
    }
    public SysAppConstant.AppStateEnum getAppState() {
        return appState;
    }
    public void setAppState(SysAppConstant.AppStateEnum appState) {
        this.appState = appState;
    }
    private int appId;
     private String appName;
     private String appCode;
     private int sorting;
     private SysAppConstant.AppStateEnum appState;
         
     
}

XML配置：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.mamaguwen.dao.SysAppDao" >
  <resultMap id="BaseResultMap" type="com.mamaguwen.entity.SysApp" >
    <id column="AppId" property="appId"   jdbcType="BIGINT" />
    <result column="AppName" property="appName" jdbcType="VARCHAR" />
    <result column="AppCode" property="appCode" jdbcType="VARCHAR" />
    <result column="Sorting" property="sorting" jdbcType="VARCHAR" />
    <result column="AppState" property="appState" jdbcType="VARCHAR" />
  </resultMap>

  <select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Long" >
     Select AppId,AppName,AppCode,Sorting,AppState from sys_app
      Where  AppId=#{appId}
  </select>
  
  <delete id="deleteByPrimaryKey" parameterType="java.lang.Long" >
    delete from sys_app
    where AppId = #{appId}
  </delete>
  
  <insert id="insert" parameterType="com.mamaguwen.entity.SysApp"   useGeneratedKeys="true"  keyProperty="appId">
      insert into  sys_app (AppName,AppCode,Sorting,AppState)
      values (#{appName},#{appCode},#{sorting},#{appState})
  </insert>
  
  <update id="updateSorting" parameterType="com.mamaguwen.entity.SysApp" >
    update sys_app
    set appstate=#{appState}
    where appId = #{appId}
  </update>
</mapper>

测试：

@RunWith(value = SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = { "classpath:spring.xml",
        "classpath:spring-mybatis.xml" })
public class TestSysAppDao {
    
    private static final Logger logger = Logger.getLogger(Test_SysUser.class);

    private SysAppDao appDao;
    
    public SysAppDao getAppDao() {
        return appDao;
    }

     @Autowired
    public void setAppDao(SysAppDao appDao) {
        this.appDao = appDao;
    }

    @Test
    public void insert() {
      SysApp model=new  SysApp();
         model.setAppCode("001");
         model.setAppName("王坤");
         model.setAppState(AppStateEnum.Valid);
         appDao.insert(model);
         
         System.out.println(String.format("appId:%s", model.getAppId()));
    }
    
    @Test
    public void selectByPrimaryKey() {
        SysApp model=      appDao.selectByPrimaryKey(1);
        System.out.println("调整状态:"+model.getAppState());
    }
}

需要注意的是 定义枚举时候，定义一个toString方法则 ：

  比如 

AppStateEnum.Valid  存如数据库为 Valid
读取出来在页面显示则可以显示成：

  有效