GeoTools——新建shapefile文件

目录

一、引言

二、代码操作

1、服务端

2、返回数据

3、客户端

三、第二种新建shp方法

四、总结

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一、引言

 

本文讲解了如何读取shp数据，如何新建shp数据，并将新建的shp数据返回到客户端进行显示。

 

 

二、代码操作

 

1、服务端

list对象是为了最后将新建的shp数据返回，pointgbk数据是源文件，pointgbkbuffer是新建文件。

    @RequestMapping("/buffer")
    @ResponseBody
    public Object buffer()
    {
        List<Map<String,Object>>list=new ArrayList<>();
        long start = System.currentTimeMillis();

        String shpfile = this.getClass().getResource("/").getFile()+"file/pointgbk.shp";
        String buffile = this.getClass().getResource("/").getFile()+"file/pointgbkbuffer.shp";

        try{
            //读取shp文件
            File file = new File(shpfile);
            ShapefileDataStore shpDataStore = null;
            shpDataStore = new ShapefileDataStore(file.toURL());
            //设置编码
            Charset charset = Charset.forName("GBK");
            shpDataStore.setCharset(charset);
            String typeName = shpDataStore.getTypeNames()[0];
            SimpleFeatureSource featureSource = null;
            featureSource =  shpDataStore.getFeatureSource (typeName);
            SimpleFeatureCollection result = featureSource.getFeatures();
            SimpleFeatureIterator itertor = result.features();

            //创建shape文件对象
            File fileBuf = new File(buffile);
            Map<String, Serializable> params = new HashMap<String, Serializable>();
            params.put( ShapefileDataStoreFactory.URLP.key, fileBuf.toURI().toURL() );
            ShapefileDataStore ds = (ShapefileDataStore) new ShapefileDataStoreFactory().createNewDataStore(params);
            //获取原shp文件字段名
            SimpleFeatureType sft = featureSource.getSchema();
            List<AttributeDescriptor> attrs = sft.getAttributeDescriptors();

            //定义图形信息和属性信息
            SimpleFeatureTypeBuilder tb = new SimpleFeatureTypeBuilder();
            //tb.setCRS(DefaultGeographicCRS.WGS84);
            tb.setName("shapefile");
            for(int i=0;i<attrs.size();i++){
                AttributeDescriptor attr = attrs.get(i);
                String fieldName = attr.getName().toString();
                if(fieldName=="the_geom"){
                    tb.add(fieldName, Polygon.class);
                }
                else{
                    tb.add(fieldName, String.class);
                }
            }
            ds.createSchema(tb.buildFeatureType());
            //设置编码
            ds.setCharset(charset);
            //设置Writer，遍历原feature，添加到新feature
            FeatureWriter<SimpleFeatureType, SimpleFeature> writer = ds.getFeatureWriter(ds.getTypeNames()[0], Transaction.AUTO_COMMIT);

            while (itertor.hasNext())
            {
                SimpleFeature feature = itertor.next();
                SimpleFeature featureBuf = writer.next();
                featureBuf.setAttributes(feature.getAttributes());
                //Object temp=feature.getAttribute("the_geom");