项目中使用的MybatisPlus，要做一个基于Elastic的日志查看功能，需要统计sql相关信息。

定义一个ExecuteSqlPrintInnerInterceptor，继承 InnerInterceptor。

package com.szzj.xxx.interceptor;

import com.alibaba.druid.sql.SQLUtils;
import com.alibaba.druid.sql.ast.SQLStatement;
import com.alibaba.druid.sql.visitor.SchemaStatVisitor;
import com.alibaba.druid.stat.TableStat;
import com.alibaba.druid.util.JdbcConstants;
import com.alibaba.fastjson.JSON;
import com.baomidou.mybatisplus.extension.plugins.inner.InnerInterceptor;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.executor.Executor;
import org.apache.ibatis.mapping.BoundSql;
import org.apache.ibatis.mapping.MappedStatement;
import org.apache.ibatis.mapping.ParameterMapping;
import org.apache.ibatis.reflection.MetaObject;
import org.apache.ibatis.session.Configuration;
import org.apache.ibatis.session.ResultHandler;
import org.apache.ibatis.session.RowBounds;
import org.apache.ibatis.type.TypeHandlerRegistry;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import javax.servlet.http.HttpServletRequest;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.nio.charset.Charset;
import java.sql.SQLException;
import java.text.DateFormat;
import java.util.*;

/**
 * @description：
 * @author: zhanglao
 * @date: 2022/3/28 11:03 上午
 */
@Slf4j
public class ExecuteSqlPrintInnerInterceptor implements InnerInterceptor {

    @Override
    public void beforeQuery(Executor executor, MappedStatement ms, Object parameter, RowBounds rowBounds, ResultHandler resultHandler, BoundSql boundSql) throws SQLException {

        Configuration configuration = ms.getConfiguration();
        handleSql(configuration, boundSql, ms.getId());
    }

    @Override
    public void beforeUpdate(Executor executor, MappedStatement ms, Object parameter) throws SQLException {

        Configuration configuration = ms.getConfiguration();

        handleSql(configuration, ms.getBoundSql(parameter), ms.getId());
    }

    private static void handleSql(Configuration configuration, BoundSql boundSql, String sqlId) {
        Object parameterObject = boundSql.getParameterObject();
        List<ParameterMapping> parameterMappings = boundSql.getParameterMappings();
        //替换空格、换行、tab缩进等
        String sql = boundSql.getSql().replaceAll("[\\s]+", " ");
        if (parameterMappings.size() > 0 && parameterObject != null) {
            TypeHandlerRegistry typeHandlerRegistry = configuration.getTypeHandlerRegistry();
            if (typeHandlerRegistry.hasTypeHandler(parameterObject.getClass())) {
                sql = sql.replaceFirst("\\?", getParameterValue(parameterObject));
            } else {
                MetaObject metaObject = configuration.newMetaObject(parameterObject);
                for (ParameterMapping parameterMapping : parameterMappings) {
                    String propertyName = parameterMapping.getProperty();
                    if (metaObject.hasGetter(propertyName)) {
                        Object obj = metaObject.getValue(propertyName);
                        sql = sql.replaceFirst("\\?", getParameterValue(obj));
                    } else if (boundSql.hasAdditionalParameter(propertyName)) {
                        Object obj = boundSql.getAdditionalParameter(propertyName);
                        sql = sql.replaceFirst("\\?", getParameterValue(obj));
                    }
                }
            }
        }
        logs(sql, sqlId);
    }

    private static String getParameterValue(Object obj) {
        String value;
        if (obj instanceof String) {
            value = "'" + obj.toString() + "'";
        } else if (obj instanceof Date) {
            DateFormat formatter = DateFormat.getDateTimeInstance(DateFormat.DEFAULT, DateFormat.DEFAULT, Locale.CHINA);
            value = "'" + formatter.format(new Date()) + "'";
        } else {
            if (obj != null) {
                value = obj.toString();
            } else {
                value = "";
            }
        }
        return value.replace("$", "\\$");
    }

    /**
     * log打印
     */
    private static void logs(String sql, String sqlId) {
        ExecuteParseEntity executeParseEntity = new ExecuteParseEntity();

        HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();

        Enumeration<String> params = request.getAttributeNames();
        
        executeParseEntity.setMethodType(request.getMethod());
        executeParseEntity.setRequestAddress(getRemoteHost(request));
        executeParseEntity.setRequestURI(request.getRequestURI());
        executeParseEntity.setSqlId(sqlId);
        executeParseEntity.setSql(sql);

        parseSql(executeParseEntity);

        log.info(JSON.toJSONString(executeParseEntity));
    }

    private static void parseSql(ExecuteParseEntity executeParseEntity) {
        List<SQLStatement> sqlStatements = SQLUtils.parseStatements(executeParseEntity.getSql(), JdbcConstants.MYSQL);

        for (SQLStatement sqlStatement : sqlStatements) {
            SchemaStatVisitor schemaStatVisitor = SQLUtils.createSchemaStatVisitor(JdbcConstants.MYSQL);
            sqlStatement.accept(schemaStatVisitor);
            Map<TableStat.Name, TableStat> tables = schemaStatVisitor.getTables();
            Collection<TableStat.Column> columns = schemaStatVisitor.getColumns();

            if (Objects.nonNull(tables)) {
                List<Map<String, List<String>>> tableInfo = new ArrayList<>();
                tables.forEach(((name, tableStat) -> {
                    Map<String, List<String>> tabMap = new HashMap<>();
                    List<String> columsList = new ArrayList<>();

                    if (tableStat.getCreateCount() > 0 || tableStat.getInsertCount() > 0) {
                        log.info("update to: table[{}]", name.getName().toLowerCase());
                        columns.stream().filter(column -> Objects.equals(column.getTable().toLowerCase(), name.getName().toLowerCase())).forEach(column -> {
                            columsList.add(column.getName());
//                            log.info("to: table[{}] column[{}]", column.getTable().toLowerCase(), column.getName().toLowerCase());
                        });
                        tabMap.put(name.getName(), columsList);
                    } else  if (tableStat.getSelectCount() > 0) {
                        log.info("select from: table[{}]", name.getName().toLowerCase());
                        columns.stream().filter(column -> Objects.equals(column.getTable().toLowerCase(), name.getName().toLowerCase())).forEach(column -> {
                            columsList.add(column.getName());
//                            log.info("from: table[{}] column[{}]", column.getTable().toLowerCase(), column.getName().toLowerCase());
                        });
                        tabMap.put(name.getName(), columsList);
                    }
                    tableInfo.add(tabMap);
                }));
                executeParseEntity.setTableInfo(tableInfo);
            }
        }

    }


    /**
     * 获取请求body内容
     */
    public static String getBodyString(HttpServletRequest request) {
        StringBuilder sb = new StringBuilder();
        InputStream inputStream = null;
        BufferedReader reader = null;
        try {
            inputStream = request.getInputStream();
            reader = new BufferedReader(
                    new InputStreamReader(inputStream, Charset.forName("UTF-8")));

            char[] bodyCharBuffer = new char[1024];
            int len = 0;
            while ((len = reader.read(bodyCharBuffer)) != -1) {
                sb.append(new String(bodyCharBuffer, 0, len));
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (inputStream != null) {
                try {
                    inputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (reader != null) {
                try {
                    reader.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return sb.toString();
    }

    /**
     * 获取目标主机的ip
     * @param request
     * @return
     */
    private static String getRemoteHost(HttpServletRequest request) {
        String ip = request.getHeader("x-forwarded-for");
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
        }
        return ip.contains("0:0:0:0:0:0:0:1") ? "127.0.0.1" : ip;
    }

}

ExecuteParseEntity就是个实体接收，方便查看参数含义。

package com.xxxx.interceptor;

import com.sun.javafx.collections.MappingChange;
import lombok.Data;
import java.io.Serializable;
import java.util.List;
import java.util.Map;

/**
 * @description：
 * @author: zhanglao
 * @date: 2022/3/28 3:38 下午
 */
@Data
public class ExecuteParseEntity implements Serializable {

    private static final long serialVersionUID = -1673663624670778651L;
    /**
     * 方法类型
     */
    private String methodType;
    /**
     * 请求域名
     */
    private String requestAddress;

    /**
     * 请求api
     */
    private String requestURI;

    /**
     * sql方法
     */
    private String sqlId;

    /**
     * sql语句
     */
    private String sql;

    /**
     * 表相关信息
     */
    private List<Map<String, List<String>>> tableInfo;

    @Override
    public String toString() {
        return "ExecuteParseEntity{" +
                "requestAddress='" + requestAddress + '\'' +
                ", requestURI='" + requestURI + '\'' +
                ", sqlId='" + sqlId + '\'' +
                ", sql='" + sql + '\'' +
                ", tableInfo=" + tableInfo +
                '}';
    }
}

最后需要在MybatisPlusConfig将拦截器添加

@Bean
    public MybatisPlusInterceptor mybatisPlusInterceptor() {
        MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
        interceptor.addInnerInterceptor(new ExecuteSqlPrintInnerInterceptor());
        return interceptor;
    }

结果：

{
“requestAddress”:“127.0.0.1”,
“requestURI”:"/admin/role/permission/list",
“sql”:“SELECT id,role_id,permission_id,gmt_create,create_nick,gmt_modified,modified_nick
FROM role_permission WHERE (role_id IN (1))”,
“sqlId”:“com.xxxx.dal.mapper.RolePermissionMapper.selectList”,
“tableInfo”:[{“role_permission”:[“id”,“role_id”,“permission_id”,“gmt_create”,“create_nick”,“gmt_modified”,“modified_nick”]}]
}