mybatis拦截器怎么实现通用权限字段添加功能

这篇文章主要讲解了“mybatis拦截器怎么实现通用权限字段添加功能”,文中的讲解内容简单清晰,易于学习与理解,下面请大家跟着小编的思路慢慢深入,一起来研究和学习“mybatis拦截器怎么实现通用权限字段添加功能”吧!

创新互联主要从事成都网站设计、网站制作、网页设计、企业做网站、公司建网站等业务。立足成都服务上蔡,10多年网站建设经验,价格优惠、服务专业,欢迎来电咨询建站服务:18982081108

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

          classpath*:xmlmapper/*.xml     classpath*:resources/xmlmapper/*.xml                

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

 contextConfigLocation     classpath*:spring-beans.xml   classpath*:spring-person.xml  

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 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;  }}

感谢各位的阅读,以上就是“mybatis拦截器怎么实现通用权限字段添加功能”的内容了,经过本文的学习后,相信大家对mybatis拦截器怎么实现通用权限字段添加功能这一问题有了更深刻的体会,具体使用情况还需要大家实践验证。这里是创新互联,小编将为大家推送更多相关知识点的文章,欢迎关注!


本文题目:mybatis拦截器怎么实现通用权限字段添加功能
本文来源:http://myzitong.com/article/joddhd.html