mybatis拦截器实现通用权限字段添加的方法

mybatis-实现通用权限字段添加的方法

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

-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 budvxUbuilder =

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());

buudvxUbilder.resultSetType(ms.getResultSetType());

builder.cache(ms.getCache());

builder.flushCacheRequired(ms.isFlushttp://hCacheRequired());

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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