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我有一個插入數據庫的表單，但是在執行插入操作前我檢查是否存在現有記錄。我無法插入記錄，我得到一個StackOverFlow錯誤。春季MVC堆棧溢出錯誤 - 試圖從數據庫中獲取數據
有人能告訴我是什麼原因導致了這個錯誤，我能做些什麼來擺脫它。如果我刪除檢查hasRecords代碼預製形式罰款。它幾乎就像代碼現在不想訪問數據庫一樣。我創建不同類型的功能瓶坯，他在這裏獲得的記錄，但在這一點上我不斷收到同樣的錯誤計算器
代碼
com.crimetrack.service.MonitoringManager.getMonitoringStDate（MonitoringManager的.java：60）
public String getMonitoringStDate(Integer crimeRecNo,
Integer socialSecurityNumber) throws Exception {
return this.getMonitoringStDate(crimeRecNo, socialSecurityNumber);
}
DAO爲getMonitoringStDate
public String getMonitoringStDate(Integer crimeRecNo, Integer socialSecurityNumber){
//select the minimum start date in event there is several records although this will not be allowed
String sql = "select IFNULL(min(monitoringStDate),'0') as monitoringStDate from tblmonitoring where crimeRecNo = ? and socialSecurityNumber = ?";
String monitoringStDate = (String)getJdbcTemplate().queryForObject(sql, new Object[]{crimeRecNo,socialSecurityNumber}, String.class);
return monitoringStDate;
}
我也註冊了以下監聽：
聽衆
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<listener>
<listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
</listener>
代碼
DAO
public boolean hasMonitoringRecord(Integer crimeRecNo, Integer socialSecurityNumber){
//select a count of monitoring records there should be only one monitoring record
String sql = "select count(*) as monitoringStDate from tblmonitoring where crimeRecNo = ? and socialSecurityNumber = ?";
Integer count = (Integer)getJdbcTemplate().queryForObject(sql, new Object[]{crimeRecNo,socialSecurityNumber}, Integer.class);
if(count > 0){
return true;
}else{
return false;
}
}
控制器
if(result.hasErrors()){
myMonitoringTypeList.put("monitoringTypeList",this.monitoringTypeManager.getListOfMonitoringType());
model.addAttribute("icon", "ui-icon ui-icon-circle-close");
model.addAttribute("results", "Error: Unable to Save Record!");
model.addAttribute("monitoringType",myMonitoringTypeList);
model.addAttribute("monitoring",monitoring);
model.addAttribute("records", session.getAttribute("records"));
model.addAttribute("crimeRecNo",session.getAttribute("crimeRecNo"));
//return the user to the page they were on initially not the first page but the one with the error
return new ModelAndView("monitoringList","page",session.getAttribute("page"));
}else{
int crimeRecNo = monitoring.getCrimeRecNo();
int socialSecurityNumber = monitoring.getSocialSecurityNumber();
logger.info("No errors going to process records");
logger.info("CrimeRecNo is " + monitoring.getCrimeRecNo());
logger.info("SocialSecurity Number is " + monitoring.getSocialSecurityNumber());
//check if a record already exists. if one exist do an update else do an insert
//to check if the record exists we can simply get the start date
String dbMonitoringStDate = monitoringManager.getMonitoringStDate(crimeRecNo,socialSecurityNumber);
logger.info("The dbMonitoringStDate is " + dbMonitoringStDate);
if(monitoringManager.hasMonitoringRecord(crimeRecNo, socialSecurityNumber)){
logger.info("Has monitoring record");
//do an update
monitoringManager.updateMonitoringRecord(monitoring);
model.addAttribute("icon", "ui-icon ui-icon-circle-check");
model.addAttribute("results", "Record Was Updated");
}else {
logger.info("Does not have monitoring record");
//do an insert
monitoringManager.saveMonitoringRecord(monitoring);
model.addAttribute("icon", "ui-icon ui-icon-circle-check");
model.addAttribute("results", "Record Was Saved");
}
錯誤
7035 [http-bio-8084-exec-1] DEBUG org.springframework.web.servlet.DispatcherServlet - Cleared thread-bound request context: [email protected]
7035 [http-bio-8084-exec-1] DEBUG org.springframework.web.servlet.DispatcherServlet - Could not complete request
org.springframework.web.util.NestedServletException: Handler processing failed; nested exception is java.lang.StackOverflowError
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:972)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:789)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.StackOverflowError
at com.crimetrack.service.MonitoringManager.getMonitoringStDate(MonitoringManager.java:60)
at com.crimetrack.service.MonitoringManager.getMonitoringStDate(MonitoringManager.java:60)
at com.crimetrack.service.MonitoringManager.getMonitoringStDate(MonitoringManager.java:60)
at com.crimetrack.service.MonitoringManager.getMonitoringStDate(MonitoringManager.java:60)
at com.crimetrack.service.MonitoringManager.getMonitoringStDate(MonitoringManager.java:60)
向我們展示相關代碼。由於堆棧跟蹤指出，錯誤是在com.crimetrack.service.MonitoringManager.getMonitoringStDate（），在第60行。 – 2013-05-04 21:49:51
@JBNizet問題已更新 – devdar 2013-05-04 21:54:07