Mybatis获取实际执行的sql语句并结合业务操作

向右看齐 2023-02-19 12:24 409阅读 0赞

package com.xiaoye.interceptor;
    
    import com.baomidou.mybatisplus.core.enums.IEnum;
    import com.baomidou.mybatisplus.core.toolkit.CollectionUtils;
    import com.baomidou.mybatisplus.core.toolkit.PluginUtils;
    import com.baomidou.mybatisplus.core.toolkit.StringUtils;
    import com.baomidou.mybatisplus.extension.handlers.AbstractSqlParserHandler;
    import lombok.extern.slf4j.Slf4j;
    import org.apache.ibatis.executor.statement.StatementHandler;
    import org.apache.ibatis.mapping.BoundSql;
    import org.apache.ibatis.mapping.MappedStatement;
    import org.apache.ibatis.mapping.ParameterMapping;
    import org.apache.ibatis.mapping.ParameterMode;
    import org.apache.ibatis.plugin.*;
    import org.apache.ibatis.reflection.MetaObject;
    import org.apache.ibatis.reflection.SystemMetaObject;
    import org.apache.ibatis.session.Configuration;
    import org.apache.ibatis.type.TypeHandlerRegistry;
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    import org.springframework.stereotype.Component;
    
    import java.sql.Connection;
    import java.sql.Statement;
    import java.util.*;
    
    /** * @Description : 自定义mybatis插件，实现输出实际执行sql语句 * @Author : ChenYao(https://blog.csdn.net/chenyao1994) * @Version : 1.0 * @Create : 2020/6/20 */
    @Intercepts({ 
            @Signature(type = StatementHandler.class, method = "prepare", args = { Connection.class, Integer.class}),
            @Signature(type = StatementHandler.class, method = "batch", args = { Statement.class})
    })
    @Slf4j
    @Component
    public class MybatisSqlInterceptor extends AbstractSqlParserHandler implements Interceptor { 
        private static final Logger LOGGER = LoggerFactory.getLogger(MybatisSqlInterceptor.class);
        /** * 获取配置中需要拦截的表 */
        //@Value("#{'${tmall.sync.tables:}'.split(',')}")
        private List<String> tableNames = Arrays.asList("pms_category");
    
    /* @Lazy @Autowired private ISqlLogService sqlLogService;*/
    
        /** * 忽略插入sql_log表的语句 */
        private static final String IGNORE_SQL_PREFIX = "insert into sql_log";
    
        @Override
        public Object intercept(Invocation invocation) throws Throwable { 
            if (CollectionUtils.isEmpty(tableNames)) { 
                //继续执行
                return invocation.proceed();
            }
            StatementHandler statementHandler = PluginUtils.realTarget(invocation.getTarget());
            MetaObject metaObject = SystemMetaObject.forObject(statementHandler);
            MappedStatement mappedStatement = (MappedStatement) metaObject.getValue("delegate.mappedStatement");
            BoundSql boundSql = (BoundSql) metaObject.getValue("delegate.boundSql");
            String sql = boundSql.getSql().replaceAll("\\s+", " ").toLowerCase();
            if (sql.toLowerCase().startsWith(IGNORE_SQL_PREFIX)) { 
                //忽略自己 记录 sql 语句入库的sql
                return invocation.proceed();
            }
    
            List<ParameterMapping> parameterMappings = new ArrayList<>(boundSql.getParameterMappings());
            Object parameterObject = boundSql.getParameterObject();
            if (parameterMappings.isEmpty() && parameterObject == null) { 
                log.warn("parameterMappings is empty or parameterObject is null");
                return invocation.proceed();
            }
    
            Configuration configuration = mappedStatement.getConfiguration();
            TypeHandlerRegistry typeHandlerRegistry = configuration.getTypeHandlerRegistry();
    
            try { 
                this.sqlParser(metaObject);
    
                String parameter = "null";
                MetaObject newMetaObject = configuration.newMetaObject(parameterObject);
                for (ParameterMapping parameterMapping : parameterMappings) { 
                    if (parameterMapping.getMode() == ParameterMode.OUT) { 
                        continue;
                    }
                    String propertyName = parameterMapping.getProperty();
                    if (typeHandlerRegistry.hasTypeHandler(parameterObject.getClass())) { 
                        parameter = getParameterValue(parameterObject);
                    } else if (newMetaObject.hasGetter(propertyName)) { 
                        parameter = getParameterValue(newMetaObject.getValue(propertyName));
                    } else if (boundSql.hasAdditionalParameter(propertyName)) { 
                        parameter = getParameterValue(boundSql.getAdditionalParameter(propertyName));
                    }
                    // fixme 此处不严谨，若sql语句中有❓，则替换错位。?️
                    sql = sql.replaceFirst("\\?", parameter);
                }
                // 将拦截到的sql语句插入日志表中
    
                //TODO 最后要执行的sql 语句
                LOGGER.debug("萧曵 : {}", sql);
                //sqlLogService.save(SqlLog.builder().executedSql(sql).build());
            } catch (Exception e) { 
                log.error(String.format("intercept sql error: [%s]", sql), e);
            }
            return invocation.proceed();
        }
    
        /** * 获取参数 * * @param param Object类型参数 * @return 转换之后的参数 */
        private static String getParameterValue(Object param) { 
            if (param == null) { 
                return "null";
            }
            if (param instanceof Number) { 
                return param.toString();
            }
            String value = null;
            if (param instanceof String) { 
                value = param.toString();
            } else if (param instanceof Date) { 
                //TODO 引入依赖
                //DateUtil.format((Date) param, "yyyy-MM-dd HH:mm:ss");
            } else if (param instanceof IEnum) { 
                value = String.valueOf(((IEnum) param).getValue());
            } else { 
                value = param.toString();
            }
            return StringUtils.quotaMark(value);
        }
    
    
        @Override
        public Object plugin(Object o) { 
            if (o instanceof StatementHandler) { 
                return Plugin.wrap(o, this);
            }
            return o;
        }
    
        @Override
        public void setProperties(Properties properties) { 
    
        }
    
    }