Mybatis的增删改和log4j的基础配置

带条件查询

mapper文件的内容:

 <select id="getSelectElectron" resultType="electron">
        select * from electron where date > #{date}
    </select>

　　

select的实现:

 public void getSelectElectron() throws Exception {
            Date date =new SimpleDateFormat("yyyy-MM-dd").parse("2015-12-31");
            List<electron> getalluser = sqlSession.getMapper(ElectronDao.class).getSelectElectron(date);
            for (electron user: getalluser) {
                System.out.println(user.getType());
            }
 
        }

　　

增加操作

mapper文件的内容:

 <insert id="InsElectronDao"  useGeneratedKeys="true" keyProperty="id" parameterType="electron">
        insert into electron (id,type,price,date) values (#{id},#{type},#{price},#{date})
    </insert>

insert的实现:

//添加操作
        public void InsElectronDao() throws Exception {
            BigDecimal decimal =new BigDecimal("2356.23");
            Date date =new SimpleDateFormat("yyyy-MM-dd").parse("2016-10-25");
            electron elect = new electron(5,"CDMA-2", decimal,date);
            Integer integer = sqlSession.getMapper(ElectronDao.class).InsElectronDao(elect);
            System.out.println("id："+elect.getId());
            if (integer>0){
                sqlSession.commit();
                System.out.println("添加成功！");
            }else{
                System.out.println("添加失败!");
            }
        }

修改操作

mapper文件的内容:

  <update id="UpdateElectronDao" parameterType="electron">
        update electron set type=#{type},price=#{price},date=#{date} where id=#{id}
    </update>

　　

update的实现：

//修改操作
        public void UpdateElectronDao() throws Exception {
            BigDecimal decimal =new BigDecimal("2356.23");
            Date date =new SimpleDateFormat("yyyy-MM-dd").parse("2016-10-25");
            electron elect = new electron(2,"CDMA-2", decimal,date);
            Integer integer = sqlSession.getMapper(ElectronDao.class).UpdateElectronDao(elect);
            if (integer>0){
                sqlSession.commit();
                System.out.println("修改成功！");
            }else{
                System.out.println("修改失败!");
            }
        }

删除的操作：

mapper文件的内容:

 <delete id="DelElectronDao">
        delete from  electron where id=#{id}
    </delete>

delete的实现:

//删除操作
        public void DelElectronDao() throws Exception {
            Integer integer = sqlSession.getMapper(ElectronDao.class).DelElectronDao(4);
            if (integer>0){
                sqlSession.commit();
                System.out.println("删除成功！");
            }else{
                System.out.println("删除失败!");
            }
        }

log4j:
1.pom文件下添加依赖

<dependency>
			<groupId>log4j</groupId>
			<artifactId>log4j</artifactId>
			<version>1.2.14</version>
		</dependency>

2.log4j.properties放入正确的位置

没有目录需要新建目录，并在项目中标记成resource

3.log4j.properties 配置

#log4j.appender.Stdout=org.apache.log4j.ConsoleAppender
#log4j.appender.Stdout.layout=org.apache.log4j.PatternLayout
#log4j.appender.Stdout.layout.conversionPattern=%-5p - %-26.26c{1} - %m\n
#
#log4j.rootLogger=INFO,Stdout
#
#log4j.logger.org.apache.wicket=INFO
#log4j.logger.org.apache.wicket.protocol.http.HttpSessionStore=INFO
#log4j.logger.org.apache.wicket.version=INFO
#log4j.logger.org.apache.wicket.RequestCycle=INFO
### 设置###
log4j.rootLogger = debug,stdout,D,E
 
### 输出信息到控制抬 ###
log4j.appender.stdout = org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target = System.out
log4j.appender.stdout.layout = org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern = [%-5p] %d{yyyy-MM-dd HH:mm:ss,SSS} method:%l%n%m%n
 
### 输出DEBUG 级别以上的日志到=E://logs/error.log ###
log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
log4j.appender.D.File = D://logs/debug.log
log4j.appender.D.Append = true
log4j.appender.D.Threshold = DEBUG
log4j.appender.D.layout = org.apache.log4j.PatternLayout
log4j.appender.D.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss}  [ %t:%r ] - [ %p ]  %m%n
 
### 输出ERROR 级别以上的日志到=E://logs/error.log ###
log4j.appender.E = org.apache.log4j.DailyRollingFileAppender
log4j.appender.E.File =D://logs/error.log
log4j.appender.E.Append = true
log4j.appender.E.Threshold = ERROR
log4j.appender.E.layout = org.apache.log4j.PatternLayout
log4j.appender.E.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss}  [ %t:%r ] - [ %p ]

4.在mybatis-config.xml文件中填写