Mybatis日志工厂 limit分页查询

注意，在核心配置中语法一定不能出错（大小写和空格是否有多加都可能导致运行出错）
如:

STDOUT_LOGGING标准日志工厂

<settings>
        <setting name="logImpl" value="STDOUT_LOGGING"/>
    </settings>

若在/前面多加了一个空格都会导致输出出错。

加上settings之后输出：

关键部分：

Opening JDBC Connection
Created connection 1629687658.
Setting autocommit to false on JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@61230f6a]
> Preparing: select * from data1.user where id = ?
> Parameters: 2(Integer)
< Columns: id, name, pwd
< Row: 2, 两个孔, 341
<== Total: 1
User{id=2, name=‘两个孔’, password=‘341’}

LOG4J的日志实现

先导入jar包
log4j.properties

log4j.rootLogger = debug,D,E,info

log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
log4j.appender.D.File = logs.txt
log4j.appender.D.Append = true
log4j.appender.D.Threshold = DEBUG 
log4j.appender.D.layout = org.apache.log4j.PatternLayout
log4j.appender.D.layout.ConversionPattern = [%-5p]%d{yyyy-MM-dd HH:mm:ss} method:%l%n%m%n
log4j.appender.D.filter.infoFilter = org.apache.log4j.varia.LevelRangeFilter
log4j.appender.D.filter.infoFilter.LevelMin=DEBUG
log4j.appender.D.filter.infoFilter.LevelMax=DEBUG

log4j.appender.E = org.apache.log4j.DailyRollingFileAppender
log4j.appender.E.File = ./log/kuang.log
log4j.appender.E.Append = true
log4j.appender.E.Threshold = DEBUG 
log4j.appender.E.layout = org.apache.log4j.PatternLayout
log4j.appender.E.layout.ConversionPattern = [%-5p]%d{yyyy-MM-dd HH:mm:ss} method:%l%n%m%n 
log4j.appender.E.filter.infoFilter = org.apache.log4j.varia.LevelRangeFilter
log4j.appender.E.filter.infoFilter.LevelMin=ERROR
log4j.appender.E.filter.infoFilter.LevelMax=ERROR

log4j.appender.info=org.apache.log4j.RollingFileAppender
log4j.appender.info.Threshold=INFO
log4j.appender.info.File=logs.txt
log4j.appender.info.MaxFileSize=200MB
log4j.appender.info.MaxBackupIndex=5
log4j.appender.info.layout=org.apache.log4j.PatternLayout
log4j.appender.info.layout.ConversionPattern=[%-5p]%d{yyyy-MM-dd HH:mm:ss} method:%l%n%m%n 
log4j.appender.info.filter.infoFilter = org.apache.log4j.varia.LevelRangeFilter
log4j.appender.info.filter.infoFilter.LevelMin=INFO
log4j.appender.info.filter.infoFilter.LevelMax=INFO

xml:

<settings>
        <setting name="logImpl" value="LOG4J"/>
    </settings>

测试使用

注意!!导包时要导apache下的包:

import org.apache.log4j.Logger;

运行测试类:

public class UserDaotest {
    
    
    static  Logger logger =   Logger.getLogger(UserDaotest.class);
 @Test
    public void testlog(){
    
    
        logger.info("进入log4j:");

    }
    @Test
    public void query(){
    
    

        SqlSession sqlSession = MybatisUtils.getSqlSession();
            UserDao que = sqlSession.getMapper(UserDao.class);
        User user = que.query(2);

            System.out.println(user);
        sqlSession.close();
    }
    }

运行:
发现目录下多了一个文件：

查看文件内容:

分页查询

测试类：

 @Test
    public void getuserbylimit(){
    
    

        SqlSession sqlSession = MybatisUtils.getSqlSession();
        UserDao getbylimt = sqlSession.getMapper(UserDao.class);
       HashMap<String,Integer>map = new HashMap<String,Integer>();
       map.put("startindex",0);
       map.put("pagesize",6);
        List<User>userList = getbylimt.getuserbylimit(map);
        for(User user:userList){
    
    
            System.out.println(user);
        }
        sqlSession.close();
    }

UserDao接口：

  List<User>getuserbylimit(Map<String,Integer>map);

sql语句:

  <select id="getuserbylimit" parameterType="map" resultType="Usera">
        select * from data1.user limit #{startindex},#{pagesize}
    </select>