java 字符串转map map转对象

1、方法

import com.alibaba.fastjson.JSON;

    //字符串传map
    Map<Object,Object> parse = (Map) JSON.parse("...");
    //map转对象
    ApiHomeVipLevelLog obj = (ApiHomeVipLevelLog)JsonUtils.getMapToObject(parse, ApiHomeVipLevelLog.class);

2、自定义JsonUtils工具类

JsonUtils.java

package com.home.app.common.utils;

import com.fasterxml.jackson.annotation.JsonInclude.Include;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;

import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.util.LinkedHashMap;
import java.util.Map;

/**
 * @author <a href="https://github.com/binarywang">Binary Wang</a>
 */
public class JsonUtils {
    private static final ObjectMapper JSON = new ObjectMapper();

    static {
        JSON.setSerializationInclusion(Include.NON_NULL);
        JSON.configure(SerializationFeature.INDENT_OUTPUT, Boolean.TRUE);
    }

    public static String toJson(Object obj) {
        try {
            return JSON.writeValueAsString(obj);
        } catch (JsonProcessingException e) {
            e.printStackTrace();
        }

        return null;
    }

    /**
     * Object转Map
     * @param obj
     * @return
     */
    public static Map<String, Object> getObjectToMap(Object obj) {
        Map<String, Object> map = new LinkedHashMap<String, Object>();
        Class<?> clazz = obj.getClass();
        System.out.println(clazz);
        for (Field field : clazz.getDeclaredFields()) {
            field.setAccessible(true);
            String fieldName = field.getName();
            Object value = null;
            try {
                value = field.get(obj);
            } catch (IllegalAccessException e) {
                e.printStackTrace();
            }
            if (value == null){
                value = "";
            }
            map.put(fieldName, value);
        }
        return map;
    }

    //Map转Object
    public static Object getMapToObject(Map<Object, Object> map, Class<?> beanClass) {
        if (map == null)
            return null;
        Object obj = null;
        try {
            obj = beanClass.newInstance();
        } catch (InstantiationException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }
        Field[] fields = obj.getClass().getDeclaredFields();
        for (Field field : fields) {
            int mod = field.getModifiers();
            if (Modifier.isStatic(mod) || Modifier.isFinal(mod)) {
                continue;
            }
            field.setAccessible(true);
            if (map.containsKey(field.getName())) {
                try {
                    field.set(obj, map.get(field.getName()));
                } catch (IllegalAccessException e) {
                    e.printStackTrace();
                }
            }
        }
        return obj;
    }
}