JAVA简便解析json文件

JAVA简便解析json文件

首先放上我要解析的json文件：

{ "resultcode":"200", "reason":"Success", "result":{ "data":[ { "id":"14", "title":"红烧肉", "tags":"家常菜;老年人;咸;半小时-1小时;青少年;白领;红烧;1-2人;炒锅", "imtro":"加了鹌鹑蛋，祝大家岁岁平“鹌”。", "ingredients":"五花肉,250g;萝卜,100g;鹌鹑蛋,20个", "burden":"油,适量;盐,适量", "albums":[ "http:\/\/juheimg.oss-cn-hangzhou.aliyuncs.com\/cookbook\/t\/0\/14_359794.jpg" ], "steps":[ { "img":"http:\/\/juheimg.oss-cn-hangzhou.aliyuncs.com\/cookbook\/s\/1\/14_706ca81e0bbecefe.jpg", "step":"1.带皮五花肉 ，鹌鹑蛋，白萝卜备用。" }, { "img":"http:\/\/juheimg.oss-cn-hangzhou.aliyuncs.com\/cookbook\/s\/1\/14_dc89a7e8f2823202.jpg", "step":"2.配料备用。" }, { "img":"http:\/\/juheimg.oss-cn-hangzhou.aliyuncs.com\/cookbook\/s\/1\/14_ae5efcd7698c7a51.jpg", "step":"3.鹌鹑蛋煮熟后去皮，备用。" }, { "img":"http:\/\/juheimg.oss-cn-hangzhou.aliyuncs.com\/cookbook\/s\/1\/14_6246ae9cde95a443.jpg", "step":"4.白萝卜洗净，切大块。" }, { "img":"http:\/\/juheimg.oss-cn-hangzhou.aliyuncs.com\/cookbook\/s\/1\/14_fa36e18ba88ba812.jpg", "step":"5.五花肉，洗净切大块。" }, { "img":"http:\/\/juheimg.oss-cn-hangzhou.aliyuncs.com\/cookbook\/s\/1\/14_fb6017cd9ea66698.jpg", "step":"6.焯水后备用。" }, { "img":"http:\/\/juheimg.oss-cn-hangzhou.aliyuncs.com\/cookbook\/s\/1\/14_79b1cc9fb722b4dd.jpg", "step":"7.油锅烧热，下入肉块。" }, { "img":"http:\/\/juheimg.oss-cn-hangzhou.aliyuncs.com\/cookbook\/s\/1\/14_0a45336653b0eb33.jpg", "step":"8.煎到微黄。" }, { "img":"http:\/\/juheimg.oss-cn-hangzhou.aliyuncs.com\/cookbook\/s\/1\/14_cb483431930bb8cd.jpg", "step":"9.加入白糖。" }, { "img":"http:\/\/juheimg.oss-cn-hangzhou.aliyuncs.com\/cookbook\/s\/1\/14_93eababb3d6f328a.jpg", "step":"10.炒到金黄色。" }, { "img":"http:\/\/juheimg.oss-cn-hangzhou.aliyuncs.com\/cookbook\/s\/1\/14_b1672001decab1dc.jpg", "step":"11.加入料酒和老抽，炒均匀。" }, { "img":"http:\/\/juheimg.oss-cn-hangzhou.aliyuncs.com\/cookbook\/s\/1\/14_03ce88cb45776456.jpg", "step":"12.放入干红椒，生姜， 八角， 香叶，花椒，炒出香味后，后加入适量的水。" }, { "img":"http:\/\/juheimg.oss-cn-hangzhou.aliyuncs.com\/cookbook\/s\/1\/14_5e067f35b2297a47.jpg", "step":"13.煮十几分钟后，加入萝卜和鹌鹑蛋。" }, { "img":"http:\/\/juheimg.oss-cn-hangzhou.aliyuncs.com\/cookbook\/s\/1\/14_7f8a56f9b8498703.jpg", "step":"14.再煮上十几分钟，肉和萝卜软烂，大火收汁加入适量的盐即可。" } ] } ], "totalNum":1, "pn":0, "rn":1 }, "error_code":0 }

结构大概如下：

调用api后返回的json文件就是这样，很长很乱。这份文件是一份菜谱，我现在只需要用到这里面菜名，食材，做法等信息。

先放上解析json的代码：

JSONObject object = JSONObject.fromObject(result);
            JSONObject ob=object.getJSONObject("result");
            JSONArray ob1=ob.getJSONArray("data");
            JSONObject o2=ob1.getJSONObject(0);
            JSONArray po=o2.getJSONArray("steps");

            if(object.getInt("error_code")==0){
                System.out.println(o2.getString("title"));
                System.out.println(o2.getString("ingredients"));
                System.out.println(o2.getString("burden"));
                 for(int i=0;i<po.size();i++){

                     JSONObject u=po.getJSONObject(i);

                     System.out.println(u.get("step"));
                 }

 通俗一点讲，解析过程分析起来就只有两点：

第一种，大括号前面的看成是JSONObject

第二种，中括号前面的看成是JSONArray

结果如下图：