MyBatis拦截器打印不带问号的完整sql语句方法

/* Preparing: SELECT * FROM tb_user WHERE id = ? AND user_name = ?  
   目标是打印：SELECT * FROM tb_user WHERE id = 1000059081 AND user_name = '积极'
*/ 这部分代码只是拦截了查询和更新，如果想对其他语句进行拦截，在@Intercepts中添加对应方法即可

package dao.Interceptor;

import org.apache.commons.collections.CollectionUtils;
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.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 java.text.DateFormat;
import java.util.Date;
import java.util.List;
import java.util.Locale;
import java.util.Properties;
import java.util.regex.Matcher;

@Intercepts({
        @Signature(type = Executor.class, method = "update", args = {
                MappedStatement.class, Object.class }),
        @Signature(type = Executor.class, method = "query", args = {
                MappedStatement.class, Object.class, RowBounds.class,
                ResultHandler.class }) })
@SuppressWarnings({"unchecked", "rawtypes"})
public class MybatisInterceptor implements Interceptor {

    @Override
    public Object intercept(Invocation invocation) throws Throwable {
        try{
            MappedStatement mappedStatement = (MappedStatement) invocation.getArgs()[0];  // 获取xml中的一个select/update/insert/delete节点，主要描述的是一条SQL语句
            Object parameter = null;
　　　　　　　// 获取参数，if语句成立，表示sql语句有参数，参数格式是map形式
            if (invocation.getArgs().length > 1) {
                parameter = invocation.getArgs()[1];
                System.out.println("parameter = " + parameter);
            }
            String sqlId = mappedStatement.getId(); // 获取到节点的id,即sql语句的id
            System.out.println("sqlId = " + sqlId);
            BoundSql boundSql = mappedStatement.getBoundSql(parameter);  // BoundSql就是封装myBatis最终产生的sql类
            Configuration configuration = mappedStatement.getConfiguration();  // 获取节点的配置
            String sql = getSql(configuration, boundSql, sqlId); // 获取到最终的sql语句
            System.out.println("sql = " + sql);
            //log.debug(sql);
        }catch(Exception e){
           // log.error(e.getMessage(), e);
        }
        return invocation.proceed();  // 执行完上面的任务后，不改变原有的sql执行过程
    }
　　// 封装了一下sql语句，使得结果返回完整xml路径下的sql语句节点id + sql语句
    public static String getSql(Configuration configuration, BoundSql boundSql,String sqlId) {
        String sql = showSql(configuration, boundSql);
        StringBuilder str = new StringBuilder(100);
        str.append(sqlId);
        str.append(":");
        str.append(sql);
        return str.toString();
    }
　　/*
    *如果参数是String，则添加单引号， 如果是日期，则转换为时间格式器并加单引号； 对参数是null和不是null的情况作了处理
　　*/
    private static String getParameterValue(Object obj) {
        String value = null;
        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;
    }
　　// 进行？的替换
    public static String showSql(Configuration configuration, BoundSql boundSql) {
        Object parameterObject = boundSql.getParameterObject();  // 获取参数
        List<ParameterMapping> parameterMappings = boundSql
                .getParameterMappings();
        String sql = boundSql.getSql().replaceAll("[\\s]+", " ");  // sql语句中多个空格都用一个空格代替
        if (CollectionUtils.isNotEmpty(parameterMappings) && parameterObject != null) {
            TypeHandlerRegistry typeHandlerRegistry = configuration.getTypeHandlerRegistry(); // 获取类型处理器注册器，类型处理器的功能是进行java类型和数据库类型的转换
　　　　　　　// 如果根据parameterObject.getClass(）可以找到对应的类型，则替换
            if (typeHandlerRegistry.hasTypeHandler(parameterObject.getClass())) {
                sql = sql.replaceFirst("\\?", Matcher.quoteReplacement(getParameterValue(parameterObject)));

            } else {
                MetaObject metaObject = configuration.newMetaObject(parameterObject);// MetaObject主要是封装了originalObject对象，提供了get和set的方法用于获取和设置originalObject的属性值,主要支持对JavaBean、Collection、Map三种类型对象的操作
                for (ParameterMapping parameterMapping : parameterMappings) {
                    String propertyName = parameterMapping.getProperty();
                    if (metaObject.hasGetter(propertyName)) {
                        Object obj = metaObject.getValue(propertyName);
                        sql = sql.replaceFirst("\\?", Matcher.quoteReplacement(getParameterValue(obj)));
                    } else if (boundSql.hasAdditionalParameter(propertyName)) {
                        Object obj = boundSql.getAdditionalParameter(propertyName);  // 该分支是动态sql
                        sql = sql.replaceFirst("\\?", Matcher.quoteReplacement(getParameterValue(obj)));
                    }else{sql=sql.replaceFirst("\\?","缺失");}//打印出缺失，提醒该参数缺失并防止错位
                }
            }
        }
        return sql;
    }

    @Override
    public Object plugin(Object target) {
        return Plugin.wrap(target, this);
    }

    @Override
    public void setProperties(Properties properties) {

    }
}

　Mybatis配置文件如下：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">

<configuration>
　　<！--该路径是拦截器文件的路径 dao.Interceptor是拦截器文件的包名称>
    <plugins>
        <plugin interceptor="dao.Interceptor.MybatisInterceptor">
        </plugin>
    </plugins>

    <environments default="development">
        <environment id="development">
                <transactionManager type="JDBC">
                    <property name="" value=""></property>
                </transactionManager>
                <dataSource type="UNPOOLED">
                    <property name="driver" value="oracle.jdbc.driver.OracleDriver"></property>
                    <property name="url" value="jdbc:oracle:thin:@xx.xxx.xxx.xxx:端口:oratest"></property>
                    <property name="username" value="用户名"></property>
                    <property name="password" value="密码"></property>
                </dataSource>
        </environment>
    </environments>

    <mappers>  

　　　　　　<mapper resource="mybatis/UserMapper.xml"/>

    </mappers>
</configuration>