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

Question

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

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;

这是上面代码中导致问题的部分:

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

上述逻辑用于基于多个参数从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,邮政编码的数量将是200,并且随着里程增加所以是否有zipcodes数量.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.intern al.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.b ooleanExpr(SqlGeneratorBase.java:840)org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanOp(SqlGeneratorBase.java:2685)org.hibernate.hql.internal.antlr.SqlGeneratorBase.booleanExpr(SqlGeneratorBase.java:840)组织. 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)

经过一些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

感谢大家的好建议，特别是@Pratik。最后，这是对我有用的代码。

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，我将用“zipcode”替换“substring(zipcode,5,9)”部分，并将邮政编码以 xxxxx 格式（例如 12345）插入数据库，而不是将其保留为 USA-xxxxx 格式以进行查询更简单并提高搜索性能。