mysql大量数据java
public void Get_WayId_Ref_isWay() throws IOException
{
<code> PreparedStatement ps = null; Connection con=null; BufferedReader br=new BufferedReader(new FileReader(Path.path_read_beijing)); StringBuffer s=null; StringBuffer wayId=null; StringBuffer isWay=new StringBuffer("false"); String regex_nd="\\d+"; //用匹配<way id string regex_id="(?<=id=\" try class.forname con="DriverManager.getConnection(url,user,pwd);" con.setautocommit int count="0;" batchcount="1;" while stringbuffer arraylist> tmp=new ArrayList<stringbuffer>(); //找出way类的信息 if(batchCount%100==0) { ps.clearBatch(); } if(s.indexOf("<way>0) { //获得每一组WayId Pattern p1=Pattern.compile(regex_id); Matcher m1=p1.matcher(s); if(m1.find()) { wayId=new StringBuffer(m1.group()); } while (s.indexOf("</way>") 0) { System.out.println("所在行数:"+count); Pattern p=Pattern.compile(regex_nd); Matcher m=p.matcher(s); if(m.find()) { tmp.add(new StringBuffer(m.group())); } } //判断该way是否为道路 if(s.indexOf("<tag k='\"highway\"")'>0||s.indexOf("<tag k='\"cycleway\"")'>0||s.indexOf("<tag k='\"bridge\"")'>0) { isWay=new StringBuffer("true"); } } for(int i=0;i<tmp.size if batchcount stringbuffer sql1="new" sql1.append into test_wayid values ps="con.prepareStatement(sql1.toString());" ps.addbatch></tmp.size></tag></tag></tag></stringbuffer></way></code>
ps=con.prepareStatement(sql1.toString());
ps.addBatch();
<code> } ps.executeBatch(); if(batchCount%100==0) { con.commit(); } } } } con.commit(); } catch (Exception e) { e.printStackTrace(); // TODO: handle exception }finally{ try { if(ps!=null) ps.close(); if(con!=null) con.close(); } catch (Exception e2) { e2.printStackTrace(); } } }</code>
报的错误是:
java.sql.SQLException: java.lang.OutOfMemoryError: Java heap space
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1055)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:926)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:430)
at com.mysql.jdbc.PreparedStatement.getInstance(PreparedStatement.java:561)
at com.mysql.jdbc.ConnectionImpl.clientPrepareStatement(ConnectionImpl.java:1395)
at com.mysql.jdbc.ConnectionImpl.prepareStatement(ConnectionImpl.java:4178)
at com.mysql.jdbc.ConnectionImpl.prepareStatement(ConnectionImpl.java:4077)
at Wayid_To_Sql.Get_Map_Line_beta.Get_WayId_Ref_isWay(Get_Map_Line_beta.java:128)
at Wayid_To_Sql.Get_Map_Line_beta.main(Get_Map_Line_beta.java:35)