1 | /* Preparing: SELECT * FROM tb_user WHERE id = ? AND user_name = ? <br> 目标是打印：SELECT * FROM tb_user WHERE id = 1000059081 AND user_name = ‘积极‘<br>*/ 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 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 | <br>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(); } /*<br> *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<br> */ 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<br> // 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>