GeoTools支持中文的解决方法

本文介绍如何使用 GeoTools 2.4 版本解决读取 shp 文件时遇到的中文乱码问题,并提供两种示例代码。

【网址】:http://www.blogjava.net/sinoly/archive/2007/09/30/geotools_shape.html 

困扰了好几天,一直在尝试各种方法解决Geotools读取shp格式对中文编码的问题。可是昨天一个无意的举动居然让我发觉自己做了太多的无用之功。仔细的看了JavaDoc以及shapefile源代码之后,可以可以明显的看到ShapefileDataStore的构造函数已经发生了很大的变化:
    

public static final Charset DEFAULT_STRING_CHARSET = Charset.forName("ISO-8859-1");


    这个是ShapefileDataStore对象中定义的字符编码。也正是由于其使用ISO-8859-1编码作为默认编码,所以一直以来,解决geotools抑或geoserver的中文问题总是连绵不绝。
   来看看我在2.4中看到的ShapefileDataStore的新的构造函数(当然,贝塔和我聊天说过好像2.3也是作出了同样修改的,可惜我没下2.3的源码,呵呵,但是2.2以前的版本这一块貌似是不同的。权当其是2.4中的“新增”之处吧)

 1     public ShapefileDataStore(URL url, boolean useMemoryMappedBuffer)
 2         throws MalformedURLException
 3     {
 4         this(url, useMemoryMappedBuffer, DEFAULT_STRING_CHARSET);
 5     }
 6
 7     public ShapefileDataStore(URL url, boolean useMemoryMappedBuffer, Charset dbfCharset)
 8         throws MalformedURLException
 9     {
10         readWriteLock = new Lock();
11         namespace = null;
12         this.useMemoryMappedBuffer = true;
13         String filename = null;
14         shpURL = ShapefileDataStoreFactory.toShpURL(url);
15         dbfURL = ShapefileDataStoreFactory.toDbfURL(url);
16         shxURL = ShapefileDataStoreFactory.toShxURL(url);
17         prjURL = ShapefileDataStoreFactory.toPrjURL(url);
18         xmlURL = ShapefileDataStoreFactory.toXmlURL(url);
19         this.dbfCharset = dbfCharset;
20     }

     
   



     列下使用Geotools 2.4操作shp格式的代码如下:
    代码1:

 1 public class ReadShape  {
 2     public static void main(String[] args) 
 3         throws FileNotFoundException,MalformedURLException,IOException{
 4         
 5         File shpFile=new File("shp/市区地物_point.dbf");
 6         ShapefileDataStore shpDataStore=new ShapefileDataStore(shpFile.toURL());
 7         shpDataStore.setStringCharset(Charset.forName("GBK"));
 8         FeatureSource fs=shpDataStore.getFeatureSource();
 9         FeatureCollection collection = fs.getFeatures();
10         FeatureIterator iterator = collection.features();
11         int numOfAttr=0;
12         try {
13            while( iterator.hasNext() ){
14                 Feature feature = iterator.next();
15                 numOfAttr = feature.getNumberOfAttributes();
16                 for(int i=0;i < numOfAttr ;i++){
17                     String temp =feature.getAttribute(i).toString();
18                      System.out.print(temp+"/t");
19                 }
20                 
21                 System.out.println();
22            }
23         }
24         finally {
25            iterator.close();
26         }
27     }
28 }

    代码2:

 1 public class ReadSHP  {
 2     public static void main(String[] args) 
 3         throws FileNotFoundException,MalformedURLException,IOException{
 4
 5         //初始化FileChannel对象
 6         FileChannel in = new FileInputStream("shp/市区地物_point.dbf").getChannel();
 7         DbaseFileReader dr=new DbaseFileReader(in, true,Charset.forName("UTF-8"));
 8         DbaseFileHeader dh = dr.getHeader();
 9         int fields = dh.getNumFields();
10         for(int i=0;i < fields ;i++){
11             System.out.print(dh.getFieldName(i)+" ");//打印当前属性名
12         }
13         System.out.print("/n");
14         while(dr.hasNext()){
15             DbaseFileReader.Row row  = dr.readRow();
16              for (int i =0;i<fields;i++){
17                      Object data  = row.read(i);
18                      if(dh.getFieldName(i).equals("NAME")){
19                             System.out.print(data);
20                     }else{
21                             System.out.print(data);
22                     }
23                     System.out.print("/t");
24             }
25             System.out.println();
26         }
27         dr.close();
28     }
29 }
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