1.基于jackson实现的json操作工具类
import org.codehaus.jackson.JsonFactory; import org.codehaus.jackson.JsonGenerator; import org.codehaus.jackson.JsonParseException; import org.codehaus.jackson.map.JsonMappingException; import org.codehaus.jackson.map.ObjectMapper; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.io.IOException; import java.io.StringWriter; public class JacksonUtil { private static Logger logger = LoggerFactory.getLogger(JacksonUtil.class); public static final ObjectMapper mapper = new ObjectMapper(); public static String toJson(Object obj) { StringWriter writer = new StringWriter(); JsonGenerator gen; try { gen = new JsonFactory().createJsonGenerator(writer); mapper.writeValue(gen, obj); gen.close(); String json = writer.toString(); writer.close(); return json; } catch (IOException e) { logger.warn(e.getMessage(),e); } return null; } public static <T> T fromJson(String json, Class<T> classOfT) { Object object; try { object = mapper.readValue(json, classOfT); return (T) object; } catch (JsonParseException e) { logger.error(e.getMessage(), e); } catch (JsonMappingException e) { logger.error(e.getMessage(), e); } catch (IOException e) { logger.error(e.getMessage(),e); } return null; } }