{"id":848,"date":"2018-01-15T15:54:05","date_gmt":"2018-01-15T07:54:05","guid":{"rendered":"https:\/\/www.ray650128.com\/wordpress\/?p=52"},"modified":"2021-09-05T13:02:58","modified_gmt":"2021-09-05T05:02:58","slug":"gson%e5%ba%8f%e5%88%97%e5%8c%96%e8%b3%87%e6%96%99","status":"publish","type":"post","link":"https:\/\/blog.ray650128.com\/?p=848","title":{"rendered":"[Android]\u4f7f\u7528Gson\u5e8f\u5217\u5316\/\u53cd\u5e8f\u5217\u5316JSON\u8cc7\u6599"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">\u524d\u8a00<\/h2>\n\n\n\n<p>\u76f8\u4fe1\u5f88\u591a\u4eba\u5728\u4e32\u63a5\u7db2\u8def\u7372\u5f97\u7684\u8cc7\u6599\uff0c\u591a\u5c11\u6703\u78b0\u5230JSON\u683c\u5f0f\u7684\u89e3\u6790\u5427\uff1f<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u95dc\u65bcJSON<\/h3>\n\n\n\n<p>JSON\u662f\u4e00\u7a2e\u8f15\u91cf\u7d1a\u7684\u8cc7\u6599\u4ea4\u63db\u683c\u5f0f\uff0c\u5167\u5bb9\u70bakey-value\u7684\u5f62\u5f0f\u8868\u793a\uff0c\u4e5f\u56e0\u6b64\u5177\u5099\u5bb9\u6613\u95b1\u8b80\u3001\u8655\u7406\u7684\u512a\u52e2\u3002<\/p>\n\n\n\n<p>JSON\u662f\u7368\u7acb\u5728\u7a0b\u5f0f\u8a9e\u8a00\u4e4b\u5916\u7684\u8cc7\u6599\u683c\u5f0f\uff0c\u76ee\u524d\u5df2\u6709\u8a31\u591a\u7684\u7a0b\u5f0f\u8a9e\u8a00\u80fd\u5920\u5c0d\u5b83\u9032\u884c\u89e3\u6790\u3002<\/p>\n\n\n\n<p>JSON\u652f\u63f4\u7684\u8cc7\u6599\u985e\u578b\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u6578\u503c\uff1a10\u9032\u4f4d\u6578\uff0c\u53ef\u5305\u542b\u6b63\u8ca0\u865f\u53ca\u5c0f\u6578\u9ede\u53ca\u6307\u6578(e)<\/li><li>\u5b57\u4e32\uff1a\u4ee5\u96d9\u5f15\u865f\u5c07\u5b57\u4e32\u7684\u524d\u5f8c\u5305\u8d77\u4f86\u8868\u793a<\/li><li>\u5e03\u6797\u503c\uff1atrue\u6216false<\/li><li>\u9663\u5217\uff1a\u4f7f\u7528\u4e2d\u62ec\u5f27<code>[]<\/code>\u5305\u4f4f\uff0c\u5143\u7d20\u4e4b\u9593\u4f7f\u7528\u9017\u865f<code>,<\/code>\u8868\u793a\u5340\u9694<\/li><li>\u7269\u4ef6\uff1a\u4f7f\u7528\u5927\u62ec\u5f27<code>{}<\/code>\u5305\u4f4f\uff0c\u5143\u7d20\u4e4b\u9593\u4f7f\u7528\u9017\u865f<code>,<\/code>\u8868\u793a\u5340\u9694<\/li><li>\u7a7a\u503c\uff1a\u6578\u503c\u4ee5null\u8868\u793a<\/li><\/ul>\n\n\n\n<p><\/p>\n\n\n\n<p>\u9019\u88e1\u7528\u4e00\u500bJSON\u683c\u5f0f\u7684\u8cc7\u6599\u4f86\u793a\u7bc4\uff0c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"json\" class=\"language-json line-numbers\">{\n    \"name\": \"\u738b\u5c0f\u660e\",\n    \"age\": 18,\n    \"grade_number\": 3,\n    \"class_number\": 10,\n    \"student_id\": \"11012345\",\n    \"gender\": \"\u7537\",\n    \"subject_grades\": [\n        {\n\u00a0           \"subject\": \"\u570b\u6587\",\n            \"score\": 95\n        },\n\n        {\n\u00a0           \"subject\": \"\u82f1\u6587\",\n            \"score\": 99\n        },\n\n        {\n\u00a0           \"subject\": \"\u6578\u5b78\",\n            \"score\": 85\n        },\n\n        {\n\u00a0           \"subject\": \"\u7269\u7406\",\n            \"score\": 83\n        },\n\n        {\n\u00a0           \"subject\": \"\u5316\u5b78\",\n            \"score\": 91\n        },\n\n        {\n\u00a0           \"subject\": \"\u751f\u7269\",\n            \"score\": 93\n        }\n\u00a0   ]\n}<\/code><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<p>\u95dc\u65bc\u66f4\u591aJSON\u683c\u5f0f\u7684\u4ecb\u7d39\uff0c\u8acb\u53c3\u8003<a rel=\"noreferrer noopener\" href=\"https:\/\/zh.wikipedia.org\/wiki\/JSON\" data-type=\"URL\" data-id=\"https:\/\/zh.wikipedia.org\/wiki\/JSON\" target=\"_blank\">\u7dad\u57fa\u767e\u79d1<\/a>\u3002<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5e8f\u5217\u5316\/\u53cd\u5e8f\u5217\u5316<\/h3>\n\n\n\n<p>\u6240\u8b02\u7684\u5e8f\u5217\u5316\uff0c\u662f\u5c07\u8cc7\u6599\u7d50\u69cb\u8f49\u63db\u6210\u6211\u5011\u53ef\u53d6\u7528\u7684\u683c\u5f0f\u3002<\/p>\n\n\n\n<p>\u800c\u53cd\u5e8f\u5217\u5316\u5247\u662f\u5c07\u6211\u5011\u53ef\u53d6\u7528\u7684\u6771\u897f\uff0c\u8f49\u63db\u56de\u8cc7\u6599\u7d50\u69cb\u3002<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>\u5c31\u62ffJSON\u4f86\u89e3\u91cb\u597d\u4e86\uff0c\u6211\u5011\u5f9eWebAPI\u53d6\u5f97\u7684\u8cc7\u6599\u901a\u5e38\u6703\u662f\u4ee5JSON\u683c\u5f0f\u7684\u8cc7\u6599\u5448\u73fe\u3002<\/p>\n\n\n\n<p>\u5728\u7a0b\u5f0f\u8a9e\u8a00\u7684\u4e16\u754c\u88e1\uff0c\u6211\u5011\u62ff\u5230\u7684\u9019\u5305JSON\u8cc7\u6599\u5be6\u969b\u4e0a\u662f\u4e00\u4e32\u9577\u5b57\u4e32\u3002<\/p>\n\n\n\n<p>\u56e0\u6b64\u6211\u5011\u5fc5\u9808\u8981\u900f\u904e\u5e8f\u5217\u5316\u7684\u65b9\u5f0f\u5c07\u8cc7\u6599\u8f49\u63db\u6210\u6211\u5011\u53ef\u53d6\u7528\u7684\u683c\u5f0f\uff0c\u4f8b\u5982\u81ea\u5b9a\u7fa9\u7684data model class\u3002<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4f7f\u7528Gson\u5e8f\u5217\u5316<\/h2>\n\n\n\n<p>\u524d\u9762\u5df2\u7d93\u63d0\u5230\uff0c \u6211\u5011\u5fc5\u9808\u8981\u900f\u904e\u5e8f\u5217\u5316\u7684\u65b9\u5f0f\u5c07JSON\u8cc7\u6599\u8f49\u63db\u6210\u6211\u5011\u53ef\u53d6\u7528\u7684\u683c\u5f0f\u3002<\/p>\n\n\n\n<p>\u5728JAVA\u7684\u4e16\u754c\u4e2d\uff0cJSON\u5be6\u969b\u4e0a\u6709\u597d\u5e7e\u7a2e\u5957\u4ef6\u53ef\u4ee5\u5354\u52a9\u6211\u5011\u9032\u884c\u5e8f\u5217\u5316\u8655\u7406\u3002<\/p>\n\n\n\n<p>\u5728\u9019\u88e1\u6211\u5011\u4f7f\u7528Google\u7684Gson\u4f86\u5c07JSON\u8cc7\u6599\u5e8f\u5217\u5316\/\u53cd\u5e8f\u5217\u5316\u3002<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>1.\u5728app\u6a21\u7d44\u4e2d\u7684build.gradle\u52a0\u5165gson\u5957\u4ef6\u5eab\uff0c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\" line-numbers\">dependencies {\n  compile 'com.google.code.gson:gson:2.8.2'\n}<\/code><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<p>2.\u5c0d\u7167JSON\u8cc7\u6599\uff0c\u751f\u6210\u81ea\u8a02\u7684data model class\uff0c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"java\" class=\"language-java\">\/\/ Student.java\nimport com.google.gson.annotations.SerializedName;\n\nimport java.io.Serializable;\nimport java.util.List;\n\npublic class Student implements Serializable {\n    private String name;\n    private int age;\n    @SerializedName(\"grade_number\") private int gradeNumber;\n    @SerializedName(\"class_number\") private int classNumber;\n    @SerializedName(\"student_id\") private String studentID;\n    private String gender;\n    @SerializedName(\"subject_grades\") private List&lt;SubjectGrade> subjectGrades;\n\n    public String getName() { return name; }\n    public void setName(String value) { this.name = value; }\n\n    public int getAge() { return age; }\n    public void setAge(int value) { this.age = value; }\n\n    public int getGradeNumber() { return gradeNumber; }\n    public void setGradeNumber(int value) { this.gradeNumber = value; }\n\n    public int getClassNumber() { return classNumber; }\n    public void setClassNumber(int value) { this.classNumber = value; }\n\n    public String getStudentID() { return studentID; }\n    public void setStudentID(String value) { this.studentID = value; }\n\n    public String getGender() { return gender; }\n    public void setGender(String value) { this.gender = value; }\n\n    public List&lt;SubjectGrade> getSubjectGrades() { return subjectGrades; }\n    public void setSubjectGrades(List&lt;SubjectGrade> value) { this.subjectGrades = value; }\n}\n\n\/\/ SubjectGrade.java\nimport java.io.Serializable;\n\npublic class SubjectGrade implements Serializable {\n    private String subject;\n    private int score;\n\n    public String getSubject() { return subject; }\n    public void setSubject(String value) { this.subject = value; }\n\n    public int getScore() { return score; }\n    public void setScore(int value) { this.score = value; }\n}\n<\/code><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5e8f\u5217\u5316 <\/h3>\n\n\n\n<p>\u5e8f\u5217\u5316\u7528\u6cd5\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"java\" class=\"language-java line-numbers\">Gson gson = new Gson();\n\nStudent student = gson.fromJson(jsonStr, Student.class);\n\nSystem.out.println(\"\u59d3\u540d: \" + student.getName() + \", \u5e74\u9f61: \" + student.getAge() + \", \u5b78\u865f: \" + student.getStudentID());\nSystem.out.println(student.getGradeNumber() + \"\u5e74\" + student.getClassNumber() + \"\u73ed\");\n\nfor (SubjectGrade subjectGrade : student.getSubjectGrades()) {\n    System.out.println(\"\u79d1\u76ee: \" + subjectGrade.getSubject() + \", \u5206\u6578: \" + subjectGrade.getScore());\n}<\/code><\/pre>\n\n\n\n<p>\u4ee5\u4e0b\u70ba\u57f7\u884c\u7d50\u679c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"\">System.out: \u59d3\u540d: \u738b\u5c0f\u660e, \u5e74\u9f61: 18, \u5b78\u865f: 11012345\nSystem.out: 3\u5e7410\u73ed\nSystem.out: \u79d1\u76ee: \u570b\u6587, \u5206\u6578: 95\nSystem.out: \u79d1\u76ee: \u82f1\u6587, \u5206\u6578: 99\nSystem.out: \u79d1\u76ee: \u6578\u5b78, \u5206\u6578: 85\nSystem.out: \u79d1\u76ee: \u7269\u7406, \u5206\u6578: 83\nSystem.out: \u79d1\u76ee: \u5316\u5b78, \u5206\u6578: 91\nSystem.out: \u79d1\u76ee: \u751f\u7269, \u5206\u6578: 93<\/code><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u53cd\u5e8f\u5217\u5316<\/h3>\n\n\n\n<p>\u7528\u6cd5\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"java\" class=\"language-java line-numbers\">String deserializeStr = gson.toJson(student, Student.class);<\/code><\/pre>\n\n\n\n<p> \u4ee5\u4e0b\u70ba\u57f7\u884c\u7d50\u679c\uff1a <\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"\">System.out: \u53cd\u5e8f\u5217\u5316\u7d50\u679c: {\"age\":18,\"class_number\":10,\"gender\":\"\u7537\",\"grade_number\":3,\"name\":\"\u738b\u5c0f\u660e\",\"student_id\":\"11012345\",\"subject_grades\":[{\"score\":95,\"subject\":\"\u570b\u6587\"},{\"score\":99,\"subject\":\"\u82f1\u6587\"},{\"score\":85,\"subject\":\"\u6578\u5b78\"},{\"score\":83,\"subject\":\"\u7269\u7406\"},{\"score\":91,\"subject\":\"\u5316\u5b78\"},{\"score\":93,\"subject\":\"\u751f\u7269\"}]}<\/code><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u7d50\u5c3e<\/h2>\n\n\n\n<p>\u4ee5\u4e0a\u662f\u4f7f\u7528Gson\u5c07JSON\u8cc7\u6599\u5e8f\u5217\u5316\/\u53cd\u5e8f\u5217\u5316\u7684\u57fa\u672c\u7528\u6cd5\u3002<\/p>\n\n\n\n<p>JSON\u76ee\u524d\u662f\u6700\u5ee3\u6cdb\u4f7f\u7528\u7684\u8cc7\u6599\u4ea4\u63db\u683c\u5f0f\uff0c\u5c24\u5176\u662f\u8207\u5f8c\u7aef\u4f3a\u670d\u5668\u4ea4\u63db\u8cc7\u6599\u6642\u90fd\u662f\u900f\u904eJSON\u3002<\/p>\n\n\n\n<p>\u56e0\u6b64\u5b78\u6703\u8655\u7406JSON\u662f\u4e00\u4ef6\u975e\u5e38\u91cd\u8981\u7684\u4e8b\u3002<\/p>\n\n\n\n<p>\u4e5f\u611f\u8b1dGoogle\u63d0\u4f9b\u4e86Gson\u9019\u500b\u65b9\u4fbf\u7684\u5957\u4ef6\uff0c\u8b93\u6211\u5011\u53ef\u4ee5\u5f88\u8f15\u9b06\u5730\u5c07JSON\u8cc7\u6599\u8f49\u63db\u6210\u6211\u5011\u53ef\u4ee5\u8655\u7406\u7684\u683c\u5f0f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u524d\u8a00 \u76f8\u4fe1\u5f88\u591a\u4eba\u5728\u4e32\u63a5\u7db2\u8def\u7372\u5f97\u7684\u8cc7\u6599\uff0c\u591a\u5c11\u6703\u78b0\u5230JSON\u683c\u5f0f\u7684\u89e3\u6790\u5427\uff1f \u95dc\u65bcJSON JSON\u662f\u4e00\u7a2e\u8f15\u91cf\u7d1a\u7684\u8cc7 &hellip; <\/p>\n","protected":false},"author":1,"featured_media":299,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[32],"class_list":["post-848","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-2","tag-32"],"_links":{"self":[{"href":"https:\/\/blog.ray650128.com\/index.php?rest_route=\/wp\/v2\/posts\/848","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.ray650128.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.ray650128.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.ray650128.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.ray650128.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=848"}],"version-history":[{"count":6,"href":"https:\/\/blog.ray650128.com\/index.php?rest_route=\/wp\/v2\/posts\/848\/revisions"}],"predecessor-version":[{"id":1183,"href":"https:\/\/blog.ray650128.com\/index.php?rest_route=\/wp\/v2\/posts\/848\/revisions\/1183"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.ray650128.com\/index.php?rest_route=\/"}],"wp:attachment":[{"href":"https:\/\/blog.ray650128.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=848"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.ray650128.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=848"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.ray650128.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=848"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}