实现效果
日常sql中直接使用权限字段实现权限内数据筛选，无需入参，直接使用，使用形式为：
select * from crh_snp.channelinfo where short_code in (${commonEnBranchNo})
注意事项说明
1、添加插件若使用xml形式mybatis可在配置文件中plugins标签中添加，本项目实际使用的为注解形式mybatis，需要通过SqlSessionFactoryBean代码方式添加或者SqlSessionFactoryBean的xml配置形式，代码在jar包中无法操作，只能使用xml配置形式，故需要覆盖SqlSessionFactoryBean配置
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> <property name="mapperLocations"> <list> <value>classpath*:xmlmapper/*.xml</value> <value>classpath*:resources/xmlmapper/*.xml</value> </list> </property> <property name="plugins"> <array> <bean class="com.cairh.xpe.snp.backend.interceptor.MybatisInterceptor"/> </array> </property></bean>
2、jdbc的jar包中配置了sqlSessionFactory，本项目中配置进行覆盖，注意spring中同名类后加载的会覆盖先加载的类，需要保证本项目配置的类后加载。spring配置文件扫描会先加载本工程项目bean，可通过新增额外的配置文件放在原配置文件后实现后加载，如
<context-param> <param-name>contextConfigLocation</param-name> <param-value> classpath*:spring-beans.xml classpath*:spring-person.xml </param-value></context-param>
3、注意添加的参数需要${}形式使用，#{}会经过预编译获取到的sql参数为问号，无法直接替换
拦截器实现类
@Intercepts({ @Signature(type = Executor.class, method = "query", args = {MappedStatement.class, Object.class, RowBounds.class, ResultHandler.class})})public class MybatisInterceptor implements Interceptor {// private Logger logger = LoggerFactory.getLogger(getClass()); @Override public Object intercept(Invocation invocation) throws Throwable { if (invocation.getTarget() instanceof Executor && invocation.getArgs().length==4) { String sql = getSqlByInvocation(invocation); //将操作员可操作的渠道、用户id及营业部作通用字段放到sql中统一解析 if(sql.contains("commonEnShortCode")){ sql = addPremissionParam(sql); resetSql2Invocation(invocation, sql); } } return invocation.proceed(); } @Override public Object plugin(Object target) { return Plugin.wrap(target, this); } @Override public void setProperties(Properties properties) {} /** * 通用权限字段添加，目前支持：commonEnShortCode、commonEnBrokerUserId、commonEnBranchNo * @param sql * @return */ private String addPremissionParam(String sql) { CrhUser crhUser = (CrhUser) RequestUtil.getRequest().getAttribute(CrhUser.CRH_USER_SESSION); BackendRoleServiceImpl backendRoleService = (BackendRoleServiceImpl)SpringContext.getBean("backendRoleServiceImpl"); if(sql.contains("commonEnBranchNo")){ List<String> enBranchNoList = backendRoleService.getEnBranchNo(crhUser.getUser_id()); String enBranchNoSql = "select to_char(column_value) from TABLE(SELECT F_TO_T_IN('"+ StringUtils.join(enBranchNoList,",")+"') FROM DUAL)"; sql = sql.replace("${commonEnBranchNo}", enBranchNoSql); } return sql; } /** * 获取当前sql * @param invocation * @return */ private String getSqlByInvocation(Invocation invocation) { final Object[] args = invocation.getArgs(); MappedStatement ms = (MappedStatement) args[0]; Object parameterObject = args[1]; BoundSql boundSql = ms.getBoundSql(parameterObject); return boundSql.getSql(); } /** * 将sql重新设置到invocation中 * @param invocation * @param sql * @throws SQLException */ private void resetSql2Invocation(Invocation invocation, String sql) throws SQLException { final Object[] args = invocation.getArgs(); MappedStatement statement = (MappedStatement) args[0]; Object parameterObject = args[1]; BoundSql boundSql = statement.getBoundSql(parameterObject); MappedStatement newStatement = newMappedStatement(statement, new BoundSqlSource(boundSql)); MetaObject msObject = MetaObject.forObject(newStatement, new DefaultObjectFactory(), new DefaultObjectWrapperFactory(),new DefaultReflectorFactory()); msObject.setValue("sqlSource.boundSql.sql", sql); args[0] = newStatement; } private MappedStatement newMappedStatement(MappedStatement ms, SqlSource newSqlSource) { MappedStatement.Builder builder = new MappedStatement.Builder(ms.getConfiguration(), ms.getId(), newSqlSource, ms.getSqlCommandType()); builder.resource(ms.getResource()); builder.fetchSize(ms.getFetchSize()); builder.statementType(ms.getStatementType()); builder.keyGenerator(ms.getKeyGenerator()); if (ms.getKeyProperties() != null && ms.getKeyProperties().length != 0) { StringBuilder keyProperties = new StringBuilder(); for (String keyProperty : ms.getKeyProperties()) { keyProperties.append(keyProperty).append(","); } keyProperties.delete(keyProperties.length() - 1, keyProperties.length()); builder.keyProperty(keyProperties.toString()); } builder.timeout(ms.getTimeout()); builder.parameterMap(ms.getParameterMap()); builder.resultMaps(ms.getResultMaps()); builder.resultSetType(ms.getResultSetType()); builder.cache(ms.getCache()); builder.flushCacheRequired(ms.isFlushCacheRequired()); builder.useCache(ms.isUseCache()); return builder.build(); }}
public class BoundSqlSource implements SqlSource { private BoundSql boundSql; public BoundSqlSource(BoundSql boundSql) { this.boundSql = boundSql; } @Override public BoundSql getBoundSql(Object parameterObject) { return boundSql; }}
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本文标题: mybatis拦截器实现通用权限字段添加的方法
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