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package com.hx.mybatis.aes.springbean; |
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import org.apache.ibatis.executor.statement.StatementHandler; |
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import org.apache.ibatis.mapping.BoundSql; |
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import org.apache.ibatis.mapping.MappedStatement; |
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import org.apache.ibatis.mapping.ParameterMapping; |
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import org.apache.ibatis.mapping.SqlCommandType; |
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import org.apache.ibatis.plugin.*; |
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import org.apache.ibatis.reflection.DefaultReflectorFactory; |
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import org.apache.ibatis.reflection.MetaObject; |
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import org.apache.ibatis.reflection.SystemMetaObject; |
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import org.apache.ibatis.session.Configuration; |
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import org.slf4j.Logger; |
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import org.slf4j.LoggerFactory; |
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import org.springframework.stereotype.Component; |
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import java.lang.reflect.Field; |
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import java.sql.Connection; |
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import java.util.List; |
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import java.util.Properties; |
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@Component |
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@Intercepts({ |
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@Signature( |
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type = StatementHandler.class, method = "prepare", args = {Connection.class, Integer.class |
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}) |
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}) |
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public class MySqlInterceptor implements Interceptor { |
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private static Logger logger = LoggerFactory.getLogger(MySqlInterceptor.class.getName()); |
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@Override |
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public Object intercept(Invocation invocation) throws Throwable { |
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// 方法一 |
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StatementHandler statementHandler = (StatementHandler) invocation.getTarget(); |
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MetaObject metaObject = MetaObject.forObject(statementHandler, SystemMetaObject.DEFAULT_OBJECT_FACTORY, SystemMetaObject.DEFAULT_OBJECT_WRAPPER_FACTORY, new DefaultReflectorFactory()); |
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//先拦截到RoutingStatementHandler,里面有个StatementHandler类型的delegate变量,其实现类是BaseStatementHandler,然后就到BaseStatementHandler的成员变量mappedStatement |
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MappedStatement mappedStatement = (MappedStatement) metaObject.getValue("delegate.mappedStatement"); |
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//id为执行的mapper方法的全路径名,如com.uv.dao.UserMapper.insertUser |
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//String id = mappedStatement.getId(); |
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//sql语句类型 select、delete、insert、update |
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SqlCommandType sqlCommandType = mappedStatement.getSqlCommandType(); |
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BoundSql boundSql = statementHandler.getBoundSql(); |
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// 获取节点的配置 |
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Configuration configuration = mappedStatement.getConfiguration(); |
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// 获取参数 |
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Object parameterObject = boundSql.getParameterObject(); |
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// 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 |
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// MetaObject metaObject1 = configuration.newMetaObject(parameterObject); |
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//获取sql中问号的基本信息 |
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List<ParameterMapping> parameterMappings = boundSql |
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.getParameterMappings(); |
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/*for (ParameterMapping parameterMapping : parameterMappings) { |
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String propertyName = parameterMapping.getProperty(); |
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System.out.println("propertyName:"+ propertyName); |
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System.out.println("parameterObject:"+ parameterObject); |
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}*/ |
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//这里可以进行sql修改 |
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//获取到原始sql语句 |
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String sql = boundSql.getSql(); |
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//新增 |
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if(sqlCommandType == SqlCommandType.INSERT){ |
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sql = SqlUtils.insertSql(sql, VariableAesKey.aesKeysTable); |
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}else if(sqlCommandType == SqlCommandType.UPDATE){ |
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sql = SqlUtils.updateSql(sql, VariableAesKey.aesKeysTable); |
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}else if(sqlCommandType == SqlCommandType.SELECT){ |
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if(VariableAesKey.isRun == 1){ |
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sql = SqlUtils.selectSql(sql, VariableAesKey.aesKeysTable); |
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} |
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}else if(sqlCommandType == SqlCommandType.DELETE){ |
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sql = SqlUtils.deleteSql(sql, VariableAesKey.aesKeysTable); |
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} |
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//通过反射修改sql语句 |
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Field field = boundSql.getClass().getDeclaredField("sql"); |
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field.setAccessible(true); |
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field.set(boundSql, sql); |
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return invocation.proceed(); |
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} |
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@Override |
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public Object plugin(Object target) { |
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if (target instanceof StatementHandler) { |
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return Plugin.wrap(target, this); |
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} else { |
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return target; |
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} |
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} |
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@Override |
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public void setProperties(Properties properties) { |
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} |
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} |