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2018-08-14 06:45
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Java如何导出不同版本的DXF

现在导出的是默认2013版的,最终需要的是2007版的,如何在导出DXF时转换成
2007版本的类型,不需要再手动由高转低,导出后直接可以用2007版打开。

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  • qq_42835472 2018-08-14 09:04
    最佳回答

    ASCII 格式的DXF文件可以用java利用组码实现,每个部分可进行封装。组码的书写需要注意空格,每行组码结束不能有空格,不然无法解析

    1.header实现,getBoundX getBoundY是定义当前画布的左上角XY坐标,getBoundWidth(),getBoundHeight()是画布长宽
    private void writeHeader ()
    throws IOException
    {
    writeBufferLine ( " 0" ) ;
    writeBufferLine ( "SECTION" ) ;
    writeBufferLine ( " 2" ) ;
    writeBufferLine ( "HEADER" ) ;

        writeBufferLine ( "  9" ) ;
        writeBufferLine ( "$EXTMIN" ) ;
        writeBufferLine ( " 10" ) ;
        writeBufferLine ( new Double ( getBoundX () ).toString () ) ;
        writeBufferLine ( "20" ) ;
        writeBufferLine ( new Double ( getBoundY () ).toString () ) ;
        writeBufferLine ( "30" ) ;
        writeBufferLine ( "0.0" ) ;
        writeBufferLine ( "  9" ) ;
        writeBufferLine ( "$EXTMAX" ) ;
        writeBufferLine ( " 10" ) ;
        writeBufferLine ( new Double ( convertXToPaper ( getBoundX () + getBoundWidth () ) ).
                          toString () ) ;
        writeBufferLine ( "20" ) ;
        writeBufferLine ( new Double ( convertYToPaper ( getBoundY () + getBoundHeight () ) ).
                          toString () ) ;
    
        writeBufferLine ( "  9" ) ;
        writeBufferLine ( "$LIMMIN" ) ;
        writeBufferLine ( " 10" ) ;
        writeBufferLine ( new Double ( convertXToPaper ( getBoundX () ) ).toString () ) ;
        writeBufferLine ( "  20" ) ;
        writeBufferLine ( new Double ( convertYToPaper ( getBoundY () ) ).toString () ) ;
        writeBufferLine ( "  9" ) ;
        writeBufferLine ( "$LIMMAX" ) ;
        writeBufferLine ( " 10" ) ;
        writeBufferLine ( new Double ( convertXToPaper ( getBoundX () + getBoundWidth () ) ).
                          toString () ) ;
        writeBufferLine ( "  20" ) ;
        writeBufferLine ( new Double ( convertYToPaper ( getBoundY () + getBoundHeight () ) ).
                          toString () ) ;
    
        writeBufferLine ( "  9" ) ;
        writeBufferLine ( "$PEXTMIN" ) ;
        writeBufferLine ( " 10" ) ;
        writeBufferLine ( new Double ( convertXToPaper ( getBoundX () ) ).toString () ) ;
        writeBufferLine ( "20" ) ;
        writeBufferLine ( new Double ( convertYToPaper ( getBoundY () ) ).toString () ) ;
        writeBufferLine ( "30" ) ;
        writeBufferLine ( "0.0" ) ;
        writeBufferLine ( "  9" ) ;
        writeBufferLine ( "$PEXTMAX" ) ;
        writeBufferLine ( " 10" ) ;
        writeBufferLine ( new Double ( convertXToPaper ( getBoundX () + getBoundWidth () ) ).
                          toString () ) ;
        writeBufferLine ( "20" ) ;
        writeBufferLine ( new Double ( convertYToPaper( getBoundY () + getBoundHeight () ) ).
                          toString () ) ;
        writeBufferLine ( "30" ) ;
        writeBufferLine ( "0.0" ) ;
    
        writeBufferLine ( "  0" ) ;
        writeBufferLine ( "ENDSEC" ) ;
    }
        2.定义图层和类型
         private void writeTables ()
        throws IOException
    {
        writeBufferLine ( "  0" ) ;
        writeBufferLine ( "SECTION" ) ;
        writeBufferLine ( "  2" ) ;
        writeBufferLine ( "TABLES" ) ;
    
        writeTableLAYER () ;
        writeTableLTYPE () ;
    
        writeBufferLine ( "  0" ) ;
        writeBufferLine ( "ENDSEC" ) ;
    }
        3.具体的资源
    
     资源一般是点,线,多条线,面,面资源也是无数条线组成,所以就点、线结构
    
     可对写点,写线,和点线的标注进行封装,写入资源的方式很重要,1种是直接写入ENTITIES中,
    
     这种写法当用mapinfo转成tab格式时,每个图层可用表展现,但是表里不会带入点、线的属性。
    

    a:写线
    private void writePolylineAD ( Point2D[] _pts , int _color ,
    String _lineStyle , String _layerName )
    throws IOException
    {
    if ( _pts.length > 2 )
    {
    for ( int i = 0 ; i <= _pts.length - 1 ; i++ )
    {
    if ( i < _pts.length - 1 )
    {
    Point2D[] pts = new Point2D.Double[2 ] ;
    pts[ 0 ] = _pts[ i ] ;
    pts[ 1 ] = _pts[ i + 1 ] ;
    writePolylineAD ( pts , _color , _lineStyle , _layerName ) ;
    }
    }
    return ;
    }
    writeBufferLine ( " 0" ) ;
    writeBufferLine ( "POLYLINE" ) ;
    writeBufferLine ( " 8" ) ;
    writeBufferLine ( _layerName ) ;
    writeBufferLine ( " 62" ) ;
    writeBufferLine ( new Integer ( _color ).toString () ) ;
    writeBufferLine ( " 6" ) ;
    writeBufferLine ( _lineStyle ) ;
    writeBufferLine ( " 66" ) ;
    writeBufferLine ( " 1" ) ;
    writeBufferLine ( " 10" ) ;
    writeBufferLine ( "0.0" ) ;
    writeBufferLine ( " 20" ) ;
    writeBufferLine ( "0.0" ) ;
    writeBufferLine ( " 30" ) ;
    writeBufferLine ( "0.0" ) ;

        for ( int j = 0 ; j < _pts.length ; j++ )
        {
            writeBufferLine ( "  0" ) ;
            writeBufferLine ( "VERTEX" ) ;
            writeBufferLine ( "  8" ) ;
            writeBufferLine ( _layerName ) ;
            writeBufferLine ( " 10" ) ;
            writeBufferLine ( new Double ( _pts[ j ].getX () ).toString () ) ;
            writeBufferLine ( " 20" ) ;
            writeBufferLine ( new Double ( _pts[ j ].getY () ).toString () ) ;
            writeBufferLine ( " 30" ) ;
            writeBufferLine ( "0.0" ) ;
        }
    
        writeBufferLine ( "  0" ) ;
        writeBufferLine ( "SEQEND" ) ;
        writeBufferLine ( "  8" ) ;
        writeBufferLine ( _layerName ) ;
    }
        b:写标注
          private void writeText ( double _x , double _y , double _fontSize ,
                             int _color , String _text , int Align ,
                             String _layerName , double _angle,double xOffset,double yOffset )
        throws IOException
    {
        if(_text.contains("<br>"))
        {
            ArrayList<String> textA=splitBR(_text);
            for(int j=0;j<textA.size();j++)
            {
                double tY;
                tY=_y-j*_fontSize;
                writeText(_x,tY,_fontSize,_color,textA.get(j).toString(),Align,_layerName,_angle,xOffset,yOffset);
            }
        }else
        {
            Rectangle2D rect = new Rectangle2D.Double ( getBoundX () , getBoundY () ,
                    getBoundWidth () , getBoundHeight () ) ;
                int out = rect.outcode ( _x , _y ) ;
                if ( out != 0 )
                {
                     return ;
                }
    
                if ( _text == null || _text.equals ( "" ) )
                    return ;
                writeBufferLine ( "  0" ) ;
                writeBufferLine ( "TEXT" ) ;
                writeBufferLine ( "  8" ) ;
    

    // if ( m_bLabelMerge )
    // writeBufferLine ( "label" ) ;
    // else
    writeBufferLine ( _layerName ) ;
    writeBufferLine ( " 10" ) ;
    writeBufferLine ( new Double ( convertX ( _x ) +xOffset).toString () ) ;
    writeBufferLine ( " 20" ) ;
    writeBufferLine ( new Double ( convertY ( _y )+yOffset ).toString () ) ;
    writeBufferLine ( " 30" ) ;
    writeBufferLine ( "0.0" ) ;
    writeBufferLine ( " 11" ) ;
    writeBufferLine ( new Double ( convertX ( _x ) +xOffset).toString () ) ;
    writeBufferLine ( " 21" ) ;
    writeBufferLine ( new Double ( convertY ( _y )+yOffset ).toString () ) ;
    writeBufferLine ( " 31" ) ;
    writeBufferLine ( "0.0" ) ;
    writeBufferLine ( " 40" ) ;
    writeBufferLine ( new Double ( _fontSize ).toString () ) ;
    writeBufferLine ( " 41" ) ;
    writeBufferLine ( "0.78" ) ;
    writeBufferLine ( " 50" ) ;
    writeBufferLine ( new Double ( _angle ).toString () ) ;
    if ( false )
    {
    //文字颜色,暂时不实现
    writeBufferLine ( " 62" ) ;
    writeBufferLine ( new Integer ( _color ).toString () ) ;
    }
    writeBufferLine ( " 1" ) ;
    //去掉换行符,该版本不支持
    _text = _text.replace ( "\r" , "" ) ;
    _text = _text.replace ( "\n" , "" ) ;

                writeBufferLine ( _text ) ;
                writeBufferLine ( " 72" ) ;
                writeBufferLine ( new Integer ( Align ).toString () ) ;
                writeBufferLine ( " 73" ) ;
                writeBufferLine ( "3" ) ;
        }
    
    }
          第二种是把点线以BLOCKS包装,属于带属性的导出。
    
      点属性导出
             private void writeGisPointSingleAtt(IMapVertex v,String layerName,int blockNum,int objNum)
     throws IOException
     {
        writeBufferLine ( "  0" ) ;
        writeBufferLine ( "BLOCK" ) ;
        writeBufferLine ( "  8" ) ;
        writeBufferLine ( layerName ) ;            
        writeBufferLine ( "  2" ) ;
        //组码 block 名称
        writeBufferLine ( "BLKP"+String.valueOf(blockNum)+"p"+String.valueOf(objNum) ) ;
        writeBufferLine ( " 70" ) ;
        writeBufferLine ( "  2" ) ;
        writeBufferLine ( "  10" ) ;
        writeBufferLine ( "0.0" ) ;
        writeBufferLine ( "  20" ) ;
        writeBufferLine ( "0.0" ) ;
        writeBufferLine ( "  30" ) ;
        writeBufferLine ( "0.0" ) ;
        writeBufferLine ( "  0" ) ;
        writeBufferLine ( "POINT" ) ;
        writeBufferLine ( "  8" ) ;
        writeBufferLine ( layerName ) ;
        writeBufferLine ( "  62" ) ;
        writeBufferLine ( "  1" ) ;
        writeBufferLine ( "  10" ) ;
        writeBufferLine ( new Double(v.getX()).toString() ) ;
        writeBufferLine ( "  20" ) ;
        writeBufferLine ( new Double(v.getY()).toString() ) ;
        writeBufferLine ( "  30" ) ;
        writeBufferLine ( "0.0" ) ;
        ArrayList<String> attr=new ArrayList<String>();
        attr.add("Name");
        attr.add("Longitude");
        attr.add("Latitude");
        attr.add("Planid");
        attr.add("IsVirtual");
        attr.add("Isabpoint");
        attr.add("Iskeyres");
        attr.add("Cutpoints");
        writeAttrInVertex(attr,layerName);
    
        writeBufferLine ( "  0" ) ;
        writeBufferLine ( "ENDBLK" ) ;
     }
        //每个点带属性导出至DXF,便于mapinfo的转换
    //20121221
    private void writeGisPointWithAtt(ArrayList<IMapVertex> res,ArrayList<String> layerNameRes) 
    throws IOException
    {
        for(int i=0;i<res.size();i++)
        {
             YVertexReduce v=(YVertexReduce)res.get(i).getID();
              writeBufferLine ( "  0" ) ;
              writeBufferLine ( "BLOCK" ) ;
              writeBufferLine ( "  8" ) ;
              writeBufferLine ( layerNameRes.get(i) ) ;            
              writeBufferLine ( "  2" ) ;
              //组码 block 名称
              writeBufferLine ( "BLK"+String.valueOf(i) ) ;
              writeBufferLine ( " 70" ) ;
              writeBufferLine ( "  2" ) ;
              writeBufferLine ( "  10" ) ;
              writeBufferLine ( "0.0" ) ;
              writeBufferLine ( "  20" ) ;
              writeBufferLine ( "0.0" ) ;
              writeBufferLine ( "  30" ) ;
              writeBufferLine ( "0.0" ) ;
              writeBufferLine ( "  0" ) ;
              writeBufferLine ( "POINT" ) ;
              writeBufferLine ( "  8" ) ;
              writeBufferLine ( layerNameRes.get(i) ) ;
              writeBufferLine ( "  62" ) ;
              writeBufferLine ( "  1" ) ;
              writeBufferLine ( "  10" ) ;
              writeBufferLine ( new Double(v.geoX).toString() ) ;
              writeBufferLine ( "  20" ) ;
              writeBufferLine ( new Double(v.geoY).toString() ) ;
              writeBufferLine ( "  30" ) ;
              writeBufferLine ( "0.0" ) ;
              ArrayList<String> attr=new ArrayList<String>();
              attr.add("Name");
              attr.add("Longitude");
              attr.add("Latitude");
              attr.add("Planid");
              attr.add("IsVirtual");
              attr.add("Isabpoint");
              attr.add("Iskeyres");
              attr.add("Cutpoints");
              writeAttrInVertex(attr,layerNameRes.get(i));
    
              writeBufferLine ( "  0" ) ;
              writeBufferLine ( "ENDBLK" ) ;
        }
    }
         4.结尾
        private void writeTail ()
        throws IOException
    {
        writeBufferLine ( "  0" ) ;
        writeBufferLine ( "EOF" ) ;
    }
    
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