权限之json转化工具

第一步：pom.xml依赖

    <!--jackson-->
    <dependency>
      <groupId>org.codehaus.jackson</groupId>
      <artifactId>jackson-core-asl</artifactId>
      <version>1.9.13</version>
    </dependency>
    <dependency>
      <groupId>org.codehaus.jackson</groupId>
      <artifactId>jackson-mapper-asl</artifactId>
      <version>1.9.13</version>
    </dependency>

第二步：json转化类

package com.mall.util;

import lombok.extern.slf4j.Slf4j;
import org.codehaus.jackson.map.DeserializationConfig;
import org.codehaus.jackson.map.ObjectMapper;
import org.codehaus.jackson.map.SerializationConfig;
import org.codehaus.jackson.map.annotate.JsonSerialize;
import org.codehaus.jackson.map.ser.impl.SimpleFilterProvider;
import org.codehaus.jackson.type.TypeReference;
@Slf4j
public class JsonMapper {

    private static ObjectMapper objectMapper=new ObjectMapper();

    static{
        //config
        objectMapper.disable(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES);
        objectMapper.configure(SerializationConfig.Feature.FAIL_ON_EMPTY_BEANS,false);
        objectMapper.setFilters(new SimpleFilterProvider().setFailOnUnknownId(false));
        objectMapper.setSerializationInclusion(JsonSerialize.Inclusion.NON_EMPTY);
    }
    //对象转为字符串
    public static <T> String obj2String(T src){
        if(src==null){
            return null;
        }
        try{
            return src instanceof String ? (String)src:objectMapper.writeValueAsString(src);
        }catch(Exception e){
            log.warn("parse object to String exception,error:{}",e);
            return null;
        }
    }
    //字符串转为对象
    public static <T> T string2Obj(String src, TypeReference<T> typeReference){
        if(src==null||typeReference==null){
            return null;
        }
        try{
            return (T)(typeReference.getType().equals(String.class)? src:objectMapper.readValue(src,typeReference));
        }catch (Exception e){
            log.warn("parse String to Object exception,String:{},TypeReference<T>:{},error:{}",src,typeReference.getType());
            return null;
        }
    }
}

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