使用ObjectMapper 序列化Json

使用ObjectMapper 序列化Json

import java.io.IOException;
import java.io.InputStream;
import java.text.SimpleDateFormat;

import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.core.JsonParser.Feature;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;

/**
 * json序列化工具类
 */
public class JsonUtil {
    private static final ObjectMapper mapper = new ObjectMapper();
     static {
        mapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
        mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
        mapper.configure(Feature.ALLOW_SINGLE_QUOTES, true);
        mapper.setDateFormat(new SimpleDateFormat("yyyy.MM.dd HH:mm"));

    }
    public static String object2Json(Object obj) throws JsonProcessingException {
        return mapper.writeValueAsString(obj);
    }
    public static <T> T jsonStr2Object(String jsonStr, Class<T> clazz) throws IOException {
        return mapper.readValue(jsonStr, clazz);
    }
    public static <T> T jsonNode2Object(JsonNode jsonNode, Class<T> clazz) throws JsonProcessingException {
        return mapper.treeToValue(jsonNode, clazz);
    }
    public static JsonNode jsonStr2JsonNode(String jsonStr) throws IOException {
        return mapper.readTree(jsonStr);
    }
    public static JsonNode Object2JsonNode(Object obj) {
        return mapper.valueToTree(obj);
    }
    public static JsonNode inputStreamJsonNode(InputStream inputStream) throws JsonProcessingException, IOException {
        return mapper.readTree(inputStream);
    }
    public static <T> T jsonStr2TypeReference(String jsonStr, TypeReference<T> valueTypeRef) throws JsonParseException, JsonMappingException, IOException {
        return mapper.readValue(jsonStr, valueTypeRef);
    }

}