Mybatis打印替换占位符后的完整Sql教程

import org.apache.ibatis.cache.CacheKey;
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.mapping.ParameterMode;
import org.apache.ibatis.plugin.*;
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.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.annotation.Profile;
import org.springframework.stereotype.Component;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Properties;
/**
 * 打印sql
 *
 * @date 2019/1/14 20:13
 */
@Component
@Profile({"dev", "test"})
@Intercepts({
  @Signature(type = Executor.class, method = "query", args = {MappedStatement.class, Object.class, RowBounds.class, ResultHandler.class}),
  @Signature(type = Executor.class, method = "query", args = {MappedStatement.class, Object.class, RowBounds.class, ResultHandler.class, CacheKey.class, BoundSql.class}),
  @Signature(type = Executor.class, method = "update", args = {MappedStatement.class, Object.class})}
)
public class SqlInterceptor implements Interceptor {
 private static ThreadLocal<SimpleDateFormat> dateTimeFormatter = new ThreadLocal<SimpleDateFormat>() {
  @Override
  protected SimpleDateFormat initialValue() {
   return new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
  }
 };
 @Override
 public Object intercept(Invocation invocation) throws Throwable {
  Object result = null;
  //捕获掉异常，不要影响业务
  try {
   MappedStatement mappedStatement = (MappedStatement) invocation.getArgs()[0];
   Object parameter = null;
   if (invocation.getArgs().length > 1) {
    parameter = invocation.getArgs()[1];
   }
   String sqlId = mappedStatement.getId();
   BoundSql boundSql = mappedStatement.getBoundSql(parameter);
   Configuration configuration = mappedStatement.getConfiguration();
   long startTime = System.currentTimeMillis();
   try {
    result = invocation.proceed();
   } finally {
    long endTime = System.currentTimeMillis();
    long sqlCostTime = endTime - startTime;
    String sql = this.getSql(configuration, boundSql);
    this.formatSqlLog(sqlId, sql, sqlCostTime, result);
   }
   return result;
  } catch (Exception e) {
   return result;
  }
 }
 @Override
 public Object plugin(Object target) {
  if (target instanceof Executor) {
   return Plugin.wrap(target, this);
  }
  return target;
 }
 @Override
 public void setProperties(Properties properties) {
 }
 /**
  * 获取完整的sql语句
  *
  * @param configuration
  * @param boundSql
  * @return
  */
 private String getSql(Configuration configuration, BoundSql boundSql) {
  // 输入sql字符串空判断
  String sql = boundSql.getSql();
  if (StringUtil.isEmpty(sql)) {
   return "";
  }
  return formatSql(sql, configuration, boundSql);
 }
 /**
  * 将占位符替换成参数值
  *
  * @param sql
  * @param configuration
  * @param boundSql
  * @return
  */
 private String formatSql(String sql, Configuration configuration, BoundSql boundSql) {
  //美化sql
  sql = beautifySql(sql);
  //填充占位符, 目前基本不用mybatis存储过程调用,故此处不做考虑
  Object parameterObject = boundSql.getParameterObject();
  List<ParameterMapping> parameterMappings = boundSql.getParameterMappings();
  TypeHandlerRegistry typeHandlerRegistry = configuration.getTypeHandlerRegistry();
  List<String> parameters = new ArrayList<>();
  if (parameterMappings != null) {
   MetaObject metaObject = parameterObject == null ? null : configuration.newMetaObject(parameterObject);
   for (int i = 0; i < parameterMappings.size(); i++) {
    ParameterMapping parameterMapping = parameterMappings.get(i);
    if (parameterMapping.getMode() != ParameterMode.OUT) {
     // 参数值
     Object value;
     String propertyName = parameterMapping.getProperty();
     // 获取参数名称
     if (boundSql.hasAdditionalParameter(propertyName)) {
      // 获取参数值
      value = boundSql.getAdditionalParameter(propertyName);
     } else if (parameterObject == null) {
      value = null;
     } else if (typeHandlerRegistry.hasTypeHandler(parameterObject.getClass())) {
      // 如果是单个值则直接赋值
      value = parameterObject;
     } else {
      value = metaObject == null ? null : metaObject.getValue(propertyName);
     }
     if (value instanceof Number) {
      parameters.add(String.valueOf(value));
     } else {
      StringBuilder builder = new StringBuilder();
      builder.append("'");
      if (value instanceof Date) {
       builder.append(dateTimeFormatter.get().format((Date) value));
      } else if (value instanceof String) {
       builder.append(value);
      }
      builder.append("'");
      parameters.add(builder.toString());
     }
    }
   }
  }
  for (String value : parameters) {
   sql = sql.replaceFirst("\\?", value);
  }
  return sql;
 }
 /**
  * 格式化sql日志
  *
  * @param sqlId
  * @param sql
  * @param costTime
  * @return
  */
 private void formatSqlLog(String sqlId, String sql, long costTime, Object obj) {
  String sqlLog = "==> " + sql;
  StringBuffer result = new StringBuffer();
  if (obj instanceof List) {
   List list = (List) obj;
   int count = list.size();
   result.append("<==  Total: " + count);
  } else if (obj instanceof Integer) {
   result.append("<==  Total: " + obj);
  }
  result.append("  Spend Time ==> " + costTime + " ms");
  Logger log = LoggerFactory.getLogger(sqlId);
  log.info(sqlLog);
  log.info(result.toString());
 }
 public static String beautifySql(String sql) {
  sql = sql.replaceAll("[\\s\n ]+", " ");
  return sql;
 }
}

<configuration>
<!--
 | 全局配置设置
 |
 | 可配置选项     默认值,  描述
 |
 | aggressiveLazyLoading  true,  当设置为‘true'的时候，懒加载的对象可能被任何懒属性全部加载。否则，每个属性都按需加载。
 | multipleResultSetsEnabled true,  允许和不允许单条语句返回多个数据集（取决于驱动需求）
 | useColumnLabel    true,  使用列标签代替列名称。不同的驱动器有不同的作法。参考一下驱动器文档，或者用这两个不同的选项进行测试一下。
 | useGeneratedKeys   false, 允许JDBC 生成主键。需要驱动器支持。如果设为了true，这个设置将强制使用被生成的主键，有一些驱动器不兼容不过仍然可以执行。
 | autoMappingBehavior   PARTIAL, 指定MyBatis 是否并且如何来自动映射数据表字段与对象的属性。PARTIAL将只自动映射简单的，没有嵌套的结果。FULL 将自动映射所有复杂的结果。
 | defaultExecutorType   SIMPLE, 配置和设定执行器，SIMPLE 执行器执行其它语句。REUSE 执行器可能重复使用prepared statements 语句，BATCH执行器可以重复执行语句和批量更新。
 | defaultStatementTimeout  null,  设置一个时限，以决定让驱动器等待数据库回应的多长时间为超时
 | -->
<settings>
 <!-- 这个配置使全局的映射器启用或禁用缓存 -->
 <setting name="cacheEnabled" value="true"/>
 <!-- 全局启用或禁用延迟加载。当禁用时，所有关联对象都会即时加载 -->
 <setting name="lazyLoadingEnabled" value="false"/>
 <setting name="multipleResultSetsEnabled" value="true"/>
 <setting name="useColumnLabel" value="true"/>
 <setting name="logImpl" value="STDOUT_LOGGING" />
 <setting name="defaultExecutorType" value="REUSE"/>
 <setting name="defaultStatementTimeout" value="25000"/>
 <setting name="aggressiveLazyLoading" value="true"/>
 
</settings> 
</configuration>

<!-- 性能拦截器，兼打印sql，不生产环境配置 -->
<bean id="performanceInterceptor" class="com.baomidou.mybatisplus.plugins.PerformanceInterceptor">
 <!-- SQL 执行最大时长，超过自动停止运行，有助于发现问题。 -->
 <property name="maxTime" value="100"></property>
</bean>