Question

每当循环中的迭代变得更高时，我就会得到StackOverflowError。我正在写这样的逻辑：

public List<Vehicle> seacrhCar(Integer from, SearchDto searchDto,List<String> coveredZipcodes) {
    String q = "from Vehicle where 1=1";
    int i=1;

    if(StringUtils.isNotBlank(searchDto.getFromYear()))
        q+=" and year>='"+StringUtils.replace(searchDto.getFromYear().trim(), "'", "''")+"'";

    if(StringUtils.isNotBlank(searchDto.getToYear()))
        q+=" and year<='"+StringUtils.replace(searchDto.getToYear().trim(), "'", "''")+"'";

    if(StringUtils.isNotBlank(searchDto.getManufacturer()))
        q+=" and make='"+StringUtils.replace(searchDto.getManufacturer().trim(), "'", "''")+"'";

    if(StringUtils.isNotBlank(searchDto.getCarModel()))
        q+=" and model='"+StringUtils.replace(searchDto.getCarModel(), "'", "''")+"'";

    if(StringUtils.isNotBlank(searchDto.getTrim()))
        q+=" and trim='"+StringUtils.replace(searchDto.getTrim().trim(), "'", "''")+"'";

    if(StringUtils.isNotBlank(searchDto.getMinPrice()))
        q+=" and priceBaseMsrp>="+searchDto.getMinPrice().trim();

    if(StringUtils.isNotBlank(searchDto.getMaxPrice()))
        q+=" and priceBaseMsrp<="+searchDto.getMaxPrice().trim();

    if(coveredZipcodes.size()>0) {
        q+=" and (";
        for(String zip : coveredZipcodes) {
            q+="zipcode LIKE '%"+zip+"'";
            q+=(i==coveredZipcodes.size())?")":" or ";
            i++;
        }
    }
    q+=" group by vehicle";


    List<Vehicle> vehicles = sessionFactory.getCurrentSession().createQuery(q).setFirstResult(from).setMaxResults(10).setFlushMode(FlushMode.ALWAYS).list();
    return vehicles;

这是导致问题的上述代码中的部分：

if(coveredZipcodes.size()>0) {
        q+=" and (";
        for(String zip : coveredZipcodes) {
            q+="zipcode LIKE '%"+zip+"'";
            q+=(i==coveredZipcodes.size())?")":" or ";
            i++;
        }
    }

以上逻辑用于根据多个参数从Vehicle表中搜索车辆，其中一个参数是zipcodes。 zipcodes的值列在一个列表中，需要迭代并添加到查询中。

zipcodeList（coveredZipcodes）的大小取决于用户从他当前的邮政编码中选择的半径（距离），例如：当用户从他当前的邮政编码中选择10英里半径时，邮政编码的数量将为200，并且随着里程数的增加，邮政编码的数量也会增加。高达80-90英里，我没有得到任何错误，但当我选择100英里或更多时，它会抛出StackOverflowError。

这是堆栈跟踪：

org.springframework.web.util.NestedServletException: Handler processing failed; nested exception is java.lang.StackOverflowError
org.springframework.web.servlet.DispatcherServlet.triggerAfterCompletionWithError(DispatcherServlet.java:1284)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:965)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:876)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:852)
javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118)
org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:103)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:154)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilter(BasicAuthenticationFilter.java:150)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:199)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:110)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:50)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192)
org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160)
org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:344)
org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:261)

根本原因

java.lang.StackOverflowError的 org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanOp（SqlGeneratorBase.java:2654） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanExpr（SqlGeneratorBase.java:840） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanOp（SqlGeneratorBase.java:2685） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanExpr（SqlGeneratorBase.java:840） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanOp（SqlGeneratorBase.java:2685） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanExpr（SqlGeneratorBase.java:840） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanOp（SqlGeneratorBase.java:2685） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanExpr（SqlGeneratorBase.java:840） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanOp（SqlGeneratorBase.java:2685） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanExpr（SqlGeneratorBase.java:840） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanOp（SqlGeneratorBase.java:2685） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanExpr（SqlGeneratorBase.java:840） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanOp（SqlGeneratorBase.java:2685） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanExpr（SqlGeneratorBase.java:840） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanOp（SqlGeneratorBase.java:2685） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanExpr（SqlGeneratorBase.java:840） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanOp（SqlGeneratorBase.java:2685） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanExpr（SqlGeneratorBase.java:840） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanOp（SqlGeneratorBase.java:2685） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanExpr（SqlGeneratorBase.java:840） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanOp（SqlGeneratorBase.java:2685） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanExpr（SqlGeneratorBase.java:840） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanOp（SqlGeneratorBase.java:2685） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanExpr（SqlGeneratorBase.java:840） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanOp（SqlGeneratorBase.java:2685） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanExpr（SqlGeneratorBase.java:840） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanOp（SqlGeneratorBase.java:2685） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanExpr（SqlGeneratorBase.java:840） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanOp（SqlGeneratorBase.java:2685） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanExpr（SqlGeneratorBase.java:840） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanOp（SqlGeneratorBase.java:2685） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanExpr（SqlGeneratorBase.java:840） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanOp（SqlGeneratorBase.java:2685） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanExpr（SqlGeneratorBase.java:840） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanOp（SqlGeneratorBase.java:2685） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanExpr（SqlGeneratorBase.java:840） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanOp（SqlGeneratorBase.java:2685） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanExpr（SqlGeneratorBase.java:840） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanOp（SqlGeneratorBase.java:2685） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanExpr（SqlGeneratorBase.java:840） org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanOp（SqlGeneratorBase.java:2685）

经过一番研究后我才明白这个问题，但我该如何解决这个问题呢？

Answer 1

感谢大家提出的好建议，特别是@Pratik。最后，这是一段对我有用的代码。

if(coveredZipcodes.size()>0) {
        q.append(" and substring(zipcode,5,9) in (:zipcodes)");
    }
    q.append(" group by vehicle");

    Query query = sessionFactory.getCurrentSession().createQuery(q.toString());
    if(coveredZipcodes.size()>0)
        query.setParameterList("zipcodes", coveredZipcodes);

    List<Vehicle> vehicles = query.setFirstResult(from).setMaxResults(10).list();
    return vehicles;

但是我要替换＆＃39; substring（zipcode，5,9）＆＃39;仅使用＆＃39; zipcode＆＃39;并将以xxxxx格式（例如12345）在数据库中插入zipcode，而不是将其保存为USA-xxxxx格式，以使查询更简单，并提高搜索性能。

Answer 2

如果您可以将效果较差的LIKE更改为IN，则可以切换到条件。在这种情况下，您可以解析邮政编码列表，而无需自己进行任何循环。

List<Vehicle> vehicles = sessionFactory.getCurrentSession().createCriteria(Vehicle.class)
    .add(Restrictions.in("zipcode ", coveredZipcodes)).list();

如何在形成HQL查询时解决由于递归引起的java.lang.StackOverflowError

2 个答案: