content: package com.alibaba.fastjson.support.spring;
  
  import java.io.ByteArrayOutputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.OutputStream;
  import java.nio.charset.Charset;
  
  import org.springframework.http.HttpInputMessage;
  import org.springframework.http.HttpOutputMessage;
  import org.springframework.http.converter.AbstractHttpMessageConverter;
  import org.springframework.http.converter.HttpMessageNotReadableException;
  import org.springframework.http.converter.HttpMessageNotWritableException;
  
  import com.alibaba.fastjson.JSON;
  import com.alibaba.fastjson.serializer.SerializerFeature;
  
  public class FastJsonHttpMessageConverter extends AbstractHttpMessageConverter<Object> {
  
      public final static Charset UTF8    = Charset.forName("UTF-8");
  
      private Charset             charset = UTF8;
  
      private SerializerFeature[] serializerFeature;
  
      @Override
      protected boolean supports(Class<? extends Object> clazz) {
          return true;
      }
  
      @SuppressWarnings("rawtypes")
  	@Override
      protected Object readInternal(Class clazz, HttpInputMessage inputMessage) throws IOException,
                                                                                       HttpMessageNotReadableException {
  
          ByteArrayOutputStream baos = new ByteArrayOutputStream();
  
          InputStream in = inputMessage.getBody();
  
          byte[] buf = new byte[1024];
          for (;;) {
              int len = in.read(buf);
              if (len == -1) {
                  break;
              }
  
              if (len > 0) {
                  baos.write(buf, 0, len);
              }
          }
  
          byte[] bytes = baos.toByteArray();
          if (charset == UTF8) {
              return JSON.parseObject(bytes, clazz);
          } else {
              return JSON.parseObject(bytes, 0, bytes.length, charset.newDecoder(), clazz);
          }
      }
  
      @Override
      protected void writeInternal(Object obj, HttpOutputMessage outputMessage) throws IOException,
                                                                               HttpMessageNotWritableException {
  
          OutputStream out = outputMessage.getBody();
          byte[] bytes;
          
          if (charset == UTF8) {
              if (serializerFeature != null) {
                  bytes = JSON.toJSONBytes(obj, serializerFeature);
              } else {
                  bytes = JSON.toJSONBytes(obj);
              }
              
          } else {
              String text;
              if (serializerFeature != null) {
                  text = JSON.toJSONString(obj, serializerFeature);
              } else {
                  text = JSON.toJSONString(obj);
              }
              bytes = text.getBytes(charset);
          }
          
          out.write(bytes);
      }
  
  
  }
  