项目开发中将mysql开发的系统转成oracle开发时，出现CLOB转型的错误
抛出的异常
[org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver] - Resolving exception from handler [public com.waysoft.common.ResponseData com.waysoft.modules.common.query.controller.CommonController.getPageList(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)]: org.springframework.http.converter.HttpMessageNotWritableException: Could not write JSON: No serializer found for class oracle.jdbc.driver.OracleClobReader and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) ) (through reference chain: com.waysoft.common.ResponseData["data"]->com.waysoft.common.mybitis.page.Page["list"]->java.util.ArrayList[0]->java.util.HashMap["operate_url_params_"]->com.alibaba.druid.proxy.jdbc.ClobProxyImpl["characterStream"]); nested exception is com.fasterxml.jackson.databind.JsonMappingException: No serializer found for class oracle.jdbc.driver.OracleClobReader and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) ) (through reference chain: com.waysoft.common.ResponseData["data"]->com.waysoft.common.mybitis.page.Page["list"]->java.util.ArrayList[0]->java.util.HashMap["operate_url_params_"]->com.alibaba.druid.proxy.jdbc.ClobProxyImpl["characterStream"])
解决方案
public Page getPageList(String sqlId,Page page,Map<String,Object> map) throws SQLException { map.put("page", page);List<Map<String,Object>> list=getSqlSession().selectList(sqlId, map); for(Map<String,Object> data:list){ for (String key : data.keySet()) { if (data.get(key) instanceof Clob){ Clob clob = (Clob) data.get(key); data.put(key, clob.getSubString((long)1,(int)clob.length())); } } } page.setList(list); return page; }
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