| 提交 | 用户 | age | ||
| c64e12 | 1 | package com.hx.mybatis.aes.springbean; |
| C | 2 | |
| 3 | import org.apache.ibatis.executor.statement.StatementHandler; | |
| 4 | import org.apache.ibatis.mapping.BoundSql; | |
| 5 | import org.apache.ibatis.mapping.MappedStatement; | |
| 6 | import org.apache.ibatis.mapping.ParameterMapping; | |
| 7 | import org.apache.ibatis.mapping.SqlCommandType; | |
| 8 | import org.apache.ibatis.plugin.*; | |
| 9 | import org.apache.ibatis.reflection.DefaultReflectorFactory; | |
| 10 | import org.apache.ibatis.reflection.MetaObject; | |
| 11 | import org.apache.ibatis.reflection.SystemMetaObject; | |
| 12 | import org.apache.ibatis.session.Configuration; | |
| 13 | import org.springframework.stereotype.Component; | |
| 14 | ||
| 15 | import java.lang.reflect.Field; | |
| 16 | import java.sql.Connection; | |
| 17 | import java.util.List; | |
| 18 | import java.util.Properties; | |
| 19 | ||
| 20 | ||
| 21 | @Component | |
| 22 | @Intercepts({ | |
| 23 | @Signature( | |
| 24 | type = StatementHandler.class, method = "prepare", args = {Connection.class, Integer.class | |
| 25 | }) | |
| 26 | }) | |
| 27 | public class MySqlInterceptor implements Interceptor { | |
| 28 | @Override | |
| 29 | public Object intercept(Invocation invocation) throws Throwable { | |
| 30 | ||
| 31 | // 方法一 | |
| 32 | StatementHandler statementHandler = (StatementHandler) invocation.getTarget(); | |
| 33 | MetaObject metaObject = MetaObject.forObject(statementHandler, SystemMetaObject.DEFAULT_OBJECT_FACTORY, SystemMetaObject.DEFAULT_OBJECT_WRAPPER_FACTORY, new DefaultReflectorFactory()); | |
| 34 | //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 | |
| 35 | MappedStatement mappedStatement = (MappedStatement) metaObject.getValue("delegate.mappedStatement"); | |
| 36 | //id为执行的mapper方法的全路径名，如com.uv.dao.UserMapper.insertUser | |
| 37 | //String id = mappedStatement.getId(); | |
| 38 | //sql语句类型 select、delete、insert、update | |
| 39 | SqlCommandType sqlCommandType = mappedStatement.getSqlCommandType(); | |
| 40 | BoundSql boundSql = statementHandler.getBoundSql(); | |
| 41 | ||
| 42 | // 获取节点的配置 | |
| 43 | Configuration configuration = mappedStatement.getConfiguration(); | |
| 44 | // 获取参数 | |
| 45 | Object parameterObject = boundSql.getParameterObject(); | |
| 46 | // 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 | |
| 47 | // MetaObject metaObject1 = configuration.newMetaObject(parameterObject); | |
| 48 | //获取sql中问号的基本信息 | |
| 49 | List<ParameterMapping> parameterMappings = boundSql | |
| 50 | .getParameterMappings(); | |
| 51 | ||
| 52 | /*for (ParameterMapping parameterMapping : parameterMappings) { | |
| 53 | String propertyName = parameterMapping.getProperty(); | |
| 54 | System.out.println("propertyName："+ propertyName); | |
| 55 | System.out.println("parameterObject："+ parameterObject); | |
| 56 | }*/ | |
| 57 | ||
| 58 | //这里可以进行sql修改 | |
| 59 | //获取到原始sql语句 | |
| 60 | String sql = boundSql.getSql(); | |
| 61 | ||
| 62 | //新增 | |
| 63 | if(sqlCommandType == SqlCommandType.INSERT){ | |
| 64 | sql = SqlUtils.insertSql(sql, VariableAesKey.aesKeysTable); | |
| 65 | }else if(sqlCommandType == SqlCommandType.UPDATE){ | |
| 66 | sql = SqlUtils.updateSql(sql, VariableAesKey.aesKeysTable); | |
| 67 | }else if(sqlCommandType == SqlCommandType.SELECT){ | |
| 68 | if(VariableAesKey.isRun == 1){ | |
| 69 | sql = SqlUtils.selectSql(sql, VariableAesKey.aesKeysTable); | |
| 70 | } | |
| 71 | }else if(sqlCommandType == SqlCommandType.DELETE){ | |
| 72 | sql = SqlUtils.deleteSql(sql, VariableAesKey.aesKeysTable); | |
| 73 | } | |
| 346eb2 | 74 | |
| c64e12 | 75 | //通过反射修改sql语句 |
| C | 76 | Field field = boundSql.getClass().getDeclaredField("sql"); |
| 77 | field.setAccessible(true); | |
| 78 | field.set(boundSql, sql); | |
| 79 | return invocation.proceed(); | |
| 80 | ||
| 81 | } | |
| 82 | ||
| 83 | @Override | |
| 84 | public Object plugin(Object target) { | |
| 85 | if (target instanceof StatementHandler) { | |
| 86 | return Plugin.wrap(target, this); | |
| 87 | } else { | |
| 88 | return target; | |
| 89 | } | |
| 90 | ||
| 91 | } | |
| 92 | ||
| 93 | @Override | |
| 94 | public void setProperties(Properties properties) { | |
| 95 | ||
| 96 | } | |
| 97 | } | |
