mybatis 自定义日志实现类

快来打我* 2021-09-28 12:58 358阅读 0赞

**参考文档**  
[https://www.mybatis.org/mybatis-3/zh/logging.html][https_www.mybatis.org_mybatis-3_zh_logging.html]

项目需要引用log4j，所有配置文件与log4j一致。

package connTest.conn;
    
    import org.apache.log4j.Logger;
    import org.apache.log4j.Level;
    
    public class NbLog implements org.apache.ibatis.logging.Log { 
    
    	private static final String FQCN = NbLog.class.getName();
    	private Logger log;
    
    	private static String preparingTemp;
    	
    	public NbLog(String clazz) { 
    		this.log = Logger.getLogger(clazz);
    	}
    
    	public boolean isDebugEnabled() { 
    		return this.log.isDebugEnabled();
    	}
    
    	public boolean isTraceEnabled() { 
    		return this.log.isTraceEnabled();
    	}
    
    	public void error(String s, Throwable e) { 
    		this.log.log(FQCN, Level.ERROR, s, e);
    	}
    
    	public void error(String s) { 
    		this.log.log(FQCN, Level.ERROR, s, null);
    	}
    
    	public void debug(String s) { 
    		this.log.log(FQCN, Level.DEBUG, s, null);
    		if(s != null && s.contains("Preparing")){ 
    			preparingTemp = s;
    			return;
    		}
    		if(s != null && s.contains("Parameters")){ 
    			String preparing = preparingTemp.substring("==> Preparing: ".length());
    			preparingTemp = null;
    			String parameters = s.substring("==> Parameters: ".length());
    			if(preparing.contains(" ?")){ 
    				formatLog(preparing, parameters);
    				return;
    			}
    		}
    	}
    	
    	private void formatLog(String preparing, String parameters){ 
    		String[] params = parameters.split(", ");
    		for(String param: params){ 
    			if(param != null && param.length() != 0 && preparing != null && preparing.length() != 0 && param.indexOf("(") != -1){ 
    				preparing = preparing.replaceFirst(" \\?", " '" + param.substring(0, param.indexOf("(")) + "'");
    			}else if(param != null && param.length() != 0 && preparing != null && preparing.length() != 0){ 
    				preparing = preparing.replaceFirst(" \\?", " null");
    			}
    		}
    		System.out.println(preparing);
    	}
    
    	public void trace(String s) { 
    		this.log.log(FQCN, Level.TRACE, s, null);
    	}
    
    	public void warn(String s) { 
    		this.log.log(FQCN, Level.WARN, s, null);
    	}
    
    }

加入日志配置

*  目前存在的问题  
    正则方法比较简陋，无法应对所有情况。  
    多用户下可能会出错，只能在本地测试时使用。

[https_www.mybatis.org_mybatis-3_zh_logging.html]: https://www.mybatis.org/mybatis-3/zh/logging.html