使用GeoTools修改shp文件某条记录时shp文件里的中文数据都变成了乱码，debug发现使文件内容发生改变的代码非常迷惑，请问这段代码为什么能使文件数据发生变化？

通过debug最后定位到了断点A和断点B之间，当代码从断点A运行到断点B时，文件中的所有中文数据都变成了乱码，但是这段代码啥也没干啊（断点B那一行代码没有执行），为什么会使文件数据发生变化呢？唯一的线索就是当代码从catch那一行执行到断点B时卡顿了一下然后文件数据就乱码了，可能这中间发生了什么吧

上图代码所在的方法commit()完整代码如下，我就是调用的这个方法完成对shp文件某条记录的修改，上图代码在下面代码的73~79行

     * @see org.geotools.data.Transaction.State#commit()
     */
    public synchronized void commit() throws IOException {
        if (diff.isEmpty()) {
            return; // nothing to do
        }
        ContentEntry entry = state.getEntry();
        Name name = entry.getName();
        ContentDataStore dataStore = entry.getDataStore();
        ContentFeatureSource source = (ContentFeatureSource) dataStore.getFeatureSource(name);
        SimpleFeature feature;
        SimpleFeature update;

        Throwable cause = null;
        try (FeatureWriter<SimpleFeatureType, SimpleFeature> writer =
                getWriter(name, dataStore, source)) {
            while (writer.hasNext()) {
                feature = writer.next();
                String fid = feature.getID();

                if (diff.getModified().containsKey(fid)) {
                    update = diff.getModified().get(fid);

                    if (update == Diff.NULL) {
                        writer.remove();

                    } else {
                        try {
                            feature.setAttributes(update.getAttributes());
                            writer.write();

                        } catch (IllegalAttributeException e) {
                            throw new DataSourceException("Could update " + fid, e);
                        }
                    }
                }
            }

            SimpleFeature addedFeature;
            SimpleFeature nextFeature;

            synchronized (diff) {
                for (String fid : diff.getAddedOrder()) {
                    addedFeature = diff.getAdded().get(fid);

                    nextFeature = writer.next();

                    if (nextFeature == null) {
                        throw new DataSourceException("Could not add " + fid);
                    } else {
                        try {
                            nextFeature.setAttributes(addedFeature.getAttributes());
                            // if( Boolean.TRUE.equals(
                            // addedFeature.getUserData().get(Hints.USE_PROVIDED_FID)) ){
                            nextFeature.getUserData().put(Hints.USE_PROVIDED_FID, true);
                            if (addedFeature.getUserData().containsKey(Hints.PROVIDED_FID)) {
                                String providedFid =
                                        (String) addedFeature.getUserData().get(Hints.PROVIDED_FID);
                                nextFeature.getUserData().put(Hints.PROVIDED_FID, providedFid);
                            } else {
                                nextFeature
                                        .getUserData()
                                        .put(Hints.PROVIDED_FID, addedFeature.getID());
                            }
                            // }
                            writer.write();

                        } catch (IllegalAttributeException e) {
                            throw new DataSourceException("Could update " + fid, e);
                        }
                    }
                }
            }
        } catch (IOException | RuntimeException e) {
            cause = e;
            throw e;
        } finally {
            try {
                state.fireBatchFeatureEvent(true);
                diff.clear();
            } catch (RuntimeException e) {
                if (cause != null) {
                    e.initCause(cause);
                }
                throw e;
            }
        }
    }

乱码的数据如下，在arcgis中展示的

再贴一点代码
我构造文件存储对象datastore并设置GBK编码的方法：

    public static ShapefileDataStore buildDataStore(String shpFilePath) {
        ShapefileDataStoreFactory factory = new ShapefileDataStoreFactory();
        try {
            ShapefileDataStore dataStore = (ShapefileDataStore) factory
                    .createDataStore(new File(shpFilePath).toURI().toURL());
            if (dataStore != null) {
                dataStore.setCharset(Charset.forName("GBK"));
            }
            return dataStore;
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        return null;
    }

更新文件某条数据记录的方法（在这里调用了上述commit()方法）

    public static void updateShpValue(ShapefileDataStore dataStore, String fid, String propertyName, String value) throws IOException {
        Transaction transaction = new DefaultTransaction("change_"+propertyName+"_"+fid);
        String typeName = dataStore.getTypeNames()[0];
        SimpleFeatureStore store = (SimpleFeatureStore) dataStore.getFeatureSource(typeName);
        store.setTransaction(transaction);
        FilterFactory ff = CommonFactoryFinder.getFilterFactory( GeoTools.getDefaultHints() );
        Filter filter = ff.id(Collections.singleton(ff.featureId(fid)));
        try {
            store.modifyFeatures(propertyName, value, filter);
            transaction.commit();
        } catch(Exception eek){
            transaction.rollback();
            System.out.println("change_"+propertyName+"_"+fid+"：转换错误");
        }
    }