JSON\u7684\u89c4\u5219\u5f88\u7b80\u5355\uff1a\u5bf9\u8c61\u662f\u4e00\u4e2a\u65e0\u5e8f\u7684\u201c\u2018\u540d\u79f0\/\u503c\u2019\u5bf9\u201d\u96c6\u5408\u3002
\n\u4e00\u4e2a\u5bf9\u8c61\u4ee5\u201c{\u201d\uff08\u5de6\u62ec\u53f7\uff09\u5f00\u59cb\uff0c\u201c}\u201d\uff08\u53f3\u62ec\u53f7\uff09\u7ed3\u675f \u6bcf\u4e2a\u201c\u540d\u79f0\u201d\u540e\u8ddf\u4e00\u4e2a\u201c:\u201d\uff08\u5192\u53f7\uff09 \u201c\u2018\u540d\u79f0\/\u503c\u2019\u5bf9\u201d\u4e4b\u95f4\u4f7f\u7528\u201c,\u201d\uff08\u9017\u53f7\uff09\u5206\u9694\u3002<\/p>\n
<\/p>\n \u89c4\u5219\u5982\u4e0b: \u4f8b\u5b50<\/strong><\/p>\n [java]\u4f8b1\u3001{ "name": "Obama"}<\/p>\n \u4f8b2\u3001{ "name": "Romney","age": 56}<\/p>\n \u4f8b3\u3001{ "city":{"name": "bj"},"weatherinfo":{"weather": "sunny"}}<\/p>\n \u4f8b4\u3001{ \u4f8b6\u3001 \u5728Android\u4e2d\u4f7f\u7528json<\/strong><\/p>\n JSONObject\u89e3\u6790\u4e3e\u4f8b [java] \u89e3\u6790\u6b65\u9aa4 [java] 2\u3001\u901a\u8fc7\u6784\u9020\u51fd\u6570\u5c06json\u5b57\u7b26\u4e32\u8f6c\u6362\u6210json\u5bf9\u8c61<\/p>\n [java]JSONObject jsonObject=new JSONObject(jsonStr)\uff1b[\/java]<\/p>\n 3\u3001\u4ecejson\u5bf9\u8c61\u4e2d\u83b7\u53d6\u4f60\u6240\u9700\u8981\u7684\u952e\u6240\u5bf9\u5e94\u7684\u503c<\/p>\n [java] JSONArray\u89e3\u6790\u4e3e\u4f8b [java][ \u89e3\u6790\u6b65\u9aa4 [java]String jsonStr = DataUtil.Stream2String(in);[\/java]<\/p>\n 2\u3001\u901a\u8fc7\u6784\u9020\u51fd\u6570\u5c06json\u5b57\u7b26\u4e32\u8f6c\u6362\u6210json\u6570\u7ec4<\/p>\n [java]JSONArray array = new JSONArray(jsonStr);[\/java]<\/p>\n 3\u3001\u904d\u5386\u6570\u7ec4\uff0c\u83b7\u53d6\u6570\u7ec4\u4e2d\u6bcf\u4e00\u4e2ajson\u5bf9\u8c61\uff0c\u540c\u65f6\u53ef\u4ee5\u83b7\u53d6json\u5bf9\u8c61\u4e2d\u952e\u5bf9\u5e94\u7684\u503c<\/p>\n [java] \u6ce8\u610f\uff1a 1\u3001json\u6570\u7ec4\u5e76\u975e\u5168\u662f\u7531json\u5bf9\u8c61\u7ec4\u6210\u7684\u6570\u7ec4 \u5982\u4f55\u5c06\u4e00\u4e2ajson\u5bf9\u8c61\u8f6c\u6362\u6210json\u5b57\u7b26\u4e32\uff1f<\/strong><\/p>\n [java] \tJSONObject j2 = new JSONObject(); \tJSONArray array = new JSONArray(); \tLogs.d("=========\u89e3\u6790json\u6570\u7ec4========================"); \t} }<\/p>\n fastjson\u751f\u6210\u548c\u89e3\u6790json\u6570\u636e<\/strong><\/p>\n (\u4e3e\u4f8b\uff1a4\u79cd\u5e38\u7528\u7c7b\u578b:JavaBean,List,List,List<Map<String,Object>)<\/p>\n fastjson\u7b80\u4ecb\uff1a \u4e00. fastjson\u751f\u6210json\u5b57\u7b26\u4e32(JavaBean,List,List,List<Map<String,Object>)<\/p>\n [java]\u00a0\u00a0 String jsonStrng = JSON.toJSONString(object);[\/java]<\/p>\n \u4e8c. fastjson \u89e3\u6790json\u5b57\u7b26\u4e32\u4e3a\u56db\u79cd\u7c7b\u578b<\/p>\n [java]\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Person person = JSON.parseObject(jsonString, Person.class);<\/p>\n \u00a0\u00a0\u00a0\u00a0\u00a0 2. List<JavaBean><\/p>\n \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 List<Person> listPerson =JSON.parseArray(jsonString, Person.class);<\/p>\n \u00a0\u00a0\u00a0\u00a0\u00a0 3. List<String><\/p>\n \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 List<String> listString = JSON.parseArray(jsonString, String.class);<\/p>\n \u00a0\u00a0\u00a0\u00a0\u00a0 4. List<Map<String,Object>>[\/java]<\/p>\n <\/p>\n \u53c2\u8003\uff1a <\/p>\n Consider the following JSON.<\/p>\n The JSON object shown above comprise two authors and two books. The books have a reference to the authors through their ids as in this example the books\u2019 field <\/p>\n","protected":false},"excerpt":{"rendered":" Json\u662f\u4e00\u79cd\u8f7b\u91cf\u7ea7\u7684\u6570\u636e\u4ea4\u6362\u683c\u5f0f,\u91c7\u7528\u5b8c\u5168\u72ec\u7acb\u4e8e\u8bed\u8a00\u7684\u6587\u672c\u683c\u5f0f.\u6613\u4e8e\u9605\u8bfb\u548c\u7f16\u5199\uff0c\u540c\u65f6\u4e5f\u6613\u4e8e\u673a\u5668\u89e3\u6790\u548c\u751f\u6210.\u652f […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[8],"tags":[],"_links":{"self":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/942"}],"collection":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=942"}],"version-history":[{"count":11,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/942\/revisions"}],"predecessor-version":[{"id":3237,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/942\/revisions\/3237"}],"wp:attachment":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=942"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=942"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=942"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}![\"\u256c\u0432\u2568\u253c\u255c\u256a\u2550\u255d_20210412105246\"](\"https:\/\/ai.zhousir.top\/wp-content\/uploads\/2015\/08\/\u256c\u0432\u2568\u253c\u255c\u256a\u2550\u255d_20210412105246.png\")
<\/a><\/p>\n
\n1\uff09 \u6620\u5c04\u7528\u5192\u53f7\uff08\u201c\uff1a\u201d\uff09\u8868\u793a\u3002\u540d\u79f0:\u503c
\n2\uff09 \u5e76\u5217\u7684\u6570\u636e\u4e4b\u95f4\u7528\u9017\u53f7\uff08\u201c\uff0c\u201d\uff09\u5206\u9694\u3002\u540d\u79f01:\u503c1,\u540d\u79f02:\u503c2
\n3\uff09 \u6620\u5c04\u7684\u96c6\u5408\uff08\u5bf9\u8c61\uff09\u7528\u5927\u62ec\u53f7\uff08\u201c{}\u201d\uff09\u8868\u793a\u3002{\u540d\u79f01:\u503c,\u540d\u79f02:\u503c2}
\n4\uff09 \u5e76\u5217\u6570\u636e\u7684\u96c6\u5408\uff08\u6570\u7ec4\uff09\u7528\u65b9\u62ec\u53f7(\u201c[]\u201d)\u8868\u793a\u3002
\n[
\n{\u540d\u79f01:\u503c,\u540d\u79f02:\u503c2},
\n{\u540d\u79f01:\u503c,\u540d\u79f02:\u503c2}
\n]
\n5\uff09\u5143\u7d20\u503c\u53ef\u5177\u6709\u7684\u7c7b\u578b\uff1astring, number, object, array, true, false, null<\/p>\n
\n"city":{"name": "\u5317\u4eac",\u201ccity_id\u201d:"101010100"},
\n"weatherinfo":{"weather": "sunny","temp":"29\u5ea6"}
\n}
\n\u4f8b5\u3001
\n[
\n { "name": "\u5f20\u4e09", "age":22, "email": "zhangsan@qq.com" },
\n { "name": "\u674e\u56db", "age":23, "email": "lisi@qq.com"},
\n { "name": "\u738b\u4e94", "age":24, "email": "wangwu@qq.com" }
\n]<\/p>\n
\n{ "student":
\n [
\n { "name": "\u5f20\u4e09", "age":22, "email": "zhangsan@qq.com" },
\n { "name": "\u674e\u56db", "age":23, "email": "lisi@qq.com"},
\n { "name": "\u738b\u4e94", "age":24, "email": "wangwu@qq.com" }
\n ]
\n}
\n[\/java]<\/p>\n
\n\u5728\u670d\u52a1\u5668\u4e0a\u6709\u4e00\u4e2ahtml\u6587\u4ef6http:\/\/www.weather.com.cn\/data\/sk\/101010100.html
\nhtml\u5185\u5bb9\u5982\u4e0b\uff1a<\/p>\n
\n{"weatherinfo":
\n {"city":"\u5317\u4eac","cityid":"101010100","temp":"21","WD":"\u4e1c\u5357\u98ce"
\n ,"WS":"2 \u7ea7","SD":"78%","WSE":"2","time":"21:10","isRadar":"1"
\n ,"Radar":"JC_RADAR_AZ9010_JB"}
\n}
\n[\/java]<\/p>\n
\n1\u3001\u8bfb\u53d6html\u6587\u4ef6\u6e90\u4ee3\u7801\uff0c\u83b7\u53d6\u4e00\u4e2ajson\u5b57\u7b26\u4e32<\/p>\n
\nInputStream in = conn.getInputStream();
\nString jsonStr = DataUtil.Stream2String(in);\/\/\u5c06\u6d41\u8f6c\u6362\u6210\u5b57\u7b26\u4e32\u7684\u5de5\u5177\u7c7b[\/java]<\/p>\n
\nJSONObject json=jsonObject.getJSONObject("weatherinfo");
\nString city=json.getString("city");
\nString temp=json.getString("temp")[\/java]<\/p>\n
\n\u5728\u670d\u52a1\u5668\u4e0a\u6709\u4e00\u4e2ajs\u6587\u4ef6http:\/\/192.168.1.101\/Web\/news.js\u6587\u4ef6\u5185\u5bb9\u5982\u4e0b\uff1a<\/p>\n
\n {
\n title : "\u56fd\u5bb6\u53d1\u6539\u59d4\uff1a\u53f0\u6e7e\u964d\u6cb9\u4ef7\u548c\u5927\u9646\u6ca1\u53ef\u6bd4\u6027",
\n description : "\u56fd\u5bb6\u53d1\u6539\u59d4\u526f\u4e3b\u4efb\u6731\u4e4b\u946b",
\n image : "http:\/\/192.168.1.101\/Web\/img\/a.jpg",
\n comment : 163
\n },
\n {
\n title : "\u56fd\u5bb6\u53d1\u6539\u59d4\uff1a\u53f0\u6e7e\u964d\u6cb9\u4ef7\u548c\u5927\u9646\u6ca1\u53ef\u6bd4\u6027",
\n description : "\u56fd\u5bb6\u53d1\u6539\u59d4\u526f\u4e3b\u4efb\u6731\u4e4b\u946b",
\n image : "http:\/\/192.168.1.101\/Web\/img\/b.jpg",
\n comment : 0
\n },
\n {
\n title : "\u56fd\u5bb6\u53d1\u6539\u59d4\uff1a\u53f0\u6e7e\u964d\u6cb9\u4ef7\u548c\u5927\u9646\u6ca1\u53ef\u6bd4\u6027",
\n description : "\u56fd\u5bb6\u53d1\u6539\u59d4\u526f\u4e3b\u4efb\u6731\u4e4b\u946b",
\n image : "http:\/\/192.168.1.101\/Web\/img\/c.jpg",
\n comment : 0
\n }
\n];[\/java]<\/p>\n
\n1\u3001\u8bfb\u53d6\u6587\u4ef6\u6e90\u4ee3\u7801\uff0c\u83b7\u53d6\u4e00\u4e2ajson\u5b57\u7b26\u4e32<\/p>\n
\nfor (int i = 0; i < array.length(); i++) {
\n JSONObject obj = array.getJSONObject(i);
\n String title=obj.getString("title");
\n String description=obj.getString("description");
\n}
\n[\/java]<\/p>\n
\n2\u3001json\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e00\u4e2a\u5143\u7d20\u6570\u636e\u7c7b\u578b\u53ef\u4ee5\u4e0d\u76f8\u540c<\/p>\n
\n Logs.d("=========\u751f\u6210json\u6570\u7ec4\u5b57\u7b26\u4e32========================");
\n\tJSONObject j1 = new JSONObject();
\n\tj1.put("userName", "\u5f20\u4e09");
\n\tj1.put("passWord", "123456");<\/p>\n
\n\tj2.put("userName", "\u674e\u56db");
\n\tj2.put("passWord", "abcd");<\/p>\n
\n\tarray.put(0, j1);
\n\tarray.put(1, j2);
\n\tLogs.v(array.toString());<\/p>\n
\n\tfor(int i = 0; i<array.length(); i++){
\n\t\tJSONObject jsonObject = array.getJSONObject(i);
\n\t\tString userName = jsonObject.getString("userName");
\n\t String passWord = jsonObject.getString("passWord");
\n\t\tLogs.v("userName :"+userName+", passWord :"+passWord);<\/p>\n
\n[\/java]<\/p>\n
\nFastjson\u662f\u4e00\u4e2aJava\u8bed\u8a00\u7f16\u5199\u7684\u9ad8\u6027\u80fd\u529f\u80fd\u5b8c\u5584\u7684JSON\u5e93\u3002fastjson\u91c7\u7528\u72ec\u521b\u7684\u7b97\u6cd5\uff0c\u5c06parse\u7684\u901f\u5ea6\u63d0\u5347\u5230\u6781\u81f4\uff0c\u8d85\u8fc7\u6240\u6709json\u5e93\uff0c\u5305\u62ec\u66fe\u7ecf\u53f7\u79f0\u6700\u5feb\u7684jackson\u3002\u5e76\u4e14\u8fd8\u8d85\u8d8a\u4e86google\u7684\u4e8c\u8fdb\u5236\u534f\u8baeprotocol buf\u3002Fastjson\u5b8c\u5168\u652f\u6301http:\/\/json.org\u7684\u6807\u51c6\uff0c\u4e5f\u662f\u5b98\u65b9\u7f51\u7ad9\u6536\u5f55\u7684\u53c2\u8003\u5b9e\u73b0\u4e4b\u4e00\u3002\u652f\u6301\u5404\u79cdJDK\u7c7b\u578b\u3002\u5305\u62ec\u57fa\u672c\u7c7b\u578b\u3001JavaBean\u3001Collection\u3001Map\u3001Enum\u3001\u6cdb\u578b\u7b49\u3002\u652f\u6301JDK 5\u3001JDK 6\u3001Android\u3001\u963f\u91cc\u4e91\u624b\u673a\u7b49\u73af\u5883\u3002<\/p>\n
\n 1. JavaBean<\/p>\n
\n JSON\u5b98\u7f51<\/a>
\nFastJson<\/a><\/p>\nObject References<\/h2>\n
{\n 'authors': [\n {\n 'id': 1,\n 'name': 'Joshua Bloch'\n },\n {\n 'id': 2,\n 'name': 'Neal Gafter'\n }\n ]<\/span>,\n 'books': [\n {\n 'title': 'Java Puzzlers: Traps, Pitfalls, and Corner Cases',\n 'isbn': '032133678X',\n 'authors':[1, 2]<\/span>\n },\n {\n 'title': 'Effective Java (2nd Edition)',\n 'isbn': '0321356683', \n 'authors':[1]<\/span>\n }\n ]\n}\n<\/pre>\nauthors<\/code> only contains the authors\u2019 ids. This is quite a common scenario as this approach will reduce the size of the JSON object as duplicate objects are referred to by their id. The following image captures the new JSON object hierarchy.<\/p>\n