Question

我想使用contains函数获取title或question包含特定值的所有值。但是，我收到了这个错误：

java.sql.SQLException：几何字节字符串必须是小端。在com.mysql.jdbc.SQLError.createSQLException（SQLError.java:1074）在com.mysql.jdbc.MysqlIO.checkErrorPacket（MysqlIO.java:4120）在com.mysql.jdbc.MysqlIO.nextRowFast（MysqlIO.java:2076）在com.mysql.jdbc.MysqlIO.nextRow（MysqlIO.java:1932）在com.mysql.jdbc.MysqlIO.readSingleRowSet（MysqlIO.java:3426）在com.mysql.jdbc.MysqlIO.getResultSet（MysqlIO.java:488）在com.mysql.jdbc.MysqlIO.readResultsForQueryOrUpdate（MysqlIO.java:3131）在com.mysql.jdbc.MysqlIO.readAllResults（MysqlIO.java:2299）在com.mysql.jdbc.MysqlIO.sqlQueryDirect（MysqlIO.java:2722）在com.mysql.jdbc.ConnectionImpl.execSQL（ConnectionImpl.java:2794）在com.mysql.jdbc.PreparedStatement.executeInternal（PreparedStatement.java:2155）在com.mysql.jdbc.PreparedStatement.executeQuery（PreparedStatement.java:2322）在SQL.Select.getRecentQuestions（Select.java:447）在org.apache.jsp.Questions_jsp._jspService（Questions_jsp.java:198）在org.apache.jasper.runtime.HttpJspBase.service（HttpJspBase.java:111）在javax.servlet.http.HttpServlet.service（HttpServlet.java:790）在org.apache.jasper.servlet.JspServletWrapper.service（JspServletWrapper.java:411） at org.apache.jasper.servlet.JspServlet.serviceJspFile（JspServlet.java:473）在org.apache.jasper.servlet.JspServlet.service（JspServlet.java:377）在javax.servlet.http.HttpServlet.service（HttpServlet.java:790）在org.apache.catalina.core.StandardWrapper.service（StandardWrapper.java:1682）在org.apache.catalina.core.StandardWrapperValve.invoke（StandardWrapperValve.java:318） at org.apache.catalina.core.StandardContextValve.invoke（StandardContextValve.java:160）在org.apache.catalina.core.StandardPipeline.doInvoke（StandardPipeline.java:734）在org.apache.catalina.core.StandardPipeline.invoke（StandardPipeline.java:673）在com.sun.enterprise.web.WebPipeline.invoke（WebPipeline.java:99）在org.apache.catalina.core.StandardHostValve.invoke（StandardHostValve.java:174）在org.apache.catalina.connector.CoyoteAdapter.doService（CoyoteAdapter.java:416）在org.apache.catalina.connector.CoyoteAdapter.service（CoyoteAdapter.java:283） at com.sun.enterprise.v3.services.impl.ContainerMapper $ HttpHandlerCallable.call（ContainerMapper.java:459） at com.sun.enterprise.v3.services.impl.ContainerMapper.service（ContainerMapper.java:167）在org.glassfish.grizzly.http.server.HttpHandler.runService（HttpHandler.java:206）在org.glassfish.grizzly.http.server.HttpHandler.doHandle（HttpHandler.java:180）在org.glassfish.grizzly.http.server.HttpServerFilter.handleRead（HttpServerFilter.java:235）在org.glassfish.grizzly.filterchain.ExecutorResolver $ 9.execute（ExecutorResolver.java:119）在org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter（DefaultFilterChain.java:283）在org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart（DefaultFilterChain.java:200）在org.glassfish.grizzly.filterchain.DefaultFilterChain.execute（DefaultFilterChain.java:132）在org.glassfish.grizzly.filterchain.DefaultFilterChain.process（DefaultFilterChain.java:111）在org.glassfish.grizzly.ProcessorExecutor.execute（ProcessorExecutor.java:77）在org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent（TCPNIOTransport.java:536）在org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent（AbstractIOStrategy.java:112）在org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0（WorkerThreadIOStrategy.java:117）在org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access $ 100（WorkerThreadIOStrategy.java:56）在org.glassfish.grizzly.strategies.WorkerThreadIOStrategy $ WorkerThreadRunnable.run（WorkerThreadIOStrategy.java:137）在org.glassfish.grizzly.threadpool.AbstractThreadPool $ Worker.doWork（AbstractThreadPool.java:591）在org.glassfish.grizzly.threadpool.AbstractThreadPool $ Worker.run（AbstractThreadPool.java:571）在java.lang.Thread.run（Thread.java:748）

这是代码：

public String getRecentQuestions(String search) throws SQLException {
        PreparedStatement ps=con.prepareStatement("select title, question_id from questions where contains(title, ?) or contains(question, ?) limit 20");
        ps.setString(1, search);
        ps.setString(2, search);
        ResultSet rs=ps.executeQuery();
        StringBuilder sb=new StringBuilder("");
        while (rs.next()) {
            sb.append("<a href='Question.jsp?question=").append(rs.getInt(2)).append("'><h2>");
            sb.append(rs.getString(1));
            sb.append("</h2></a>");
        }
        return sb.toString();
    }

我的PreparedStatement有效，title列数据类型为varchar，question列数据类型也为varchar。提前谢谢。

Answer 1

mysql使用 instr（str，substr）而不是包含

也许你可以尝试 instr 或喜欢

Answer 2

肖恩·许是对的。您可以使用“ INSTR（str，substr）”对文本进行模糊查询。例如：其中INSTR（content，“ test”）> 0 ， “ INSTR”比“ like”更有效

java.sql.SQLException：几何字节字符串必须是小端

2 个答案: