{"id":2713,"date":"2020-05-31T19:09:01","date_gmt":"2020-05-31T11:09:01","guid":{"rendered":"http:\/\/170.106.148.50\/2713"},"modified":"2020-05-31T19:13:20","modified_gmt":"2020-05-31T11:13:20","slug":"b09fd27334","status":"publish","type":"post","link":"https:\/\/www.195440.com\/2713","title":{"rendered":"JSON.stringify() \u7684 5 \u4e2a\u7279\u6027"},"content":{"rendered":"
\n
\n

JSON.stringify() \u65b9\u6cd5\u80fd\u5c06\u4e00\u4e2a JavaScript \u5bf9\u8c61\u6216\u503c\u8f6c\u6362\u6210\u4e00\u4e2a JSON \u5b57\u7b26\u4e32\u3002<\/p>\n<\/blockquote>\n

JSON.stringify() \u662f\u7528\u4e8e\u8c03\u8bd5\u7684\u6700\u5e38\u89c1\u51fd\u6570\u3002<\/p>\n

    \n
  1. \n

    \/\/\u521d\u59cb\u5316\u4e00\u4e2a user \u5bf9\u8c61<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

  2. \n

    const\u00a0<\/span> user <\/span>=<\/span> {<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

  3. \n

    \"name\"<\/span> :<\/span> \"Prateek Singh\"<\/span>,<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

  4. \n

    \"age\"<\/span> :<\/span> 26<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

  5. \n

    }<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

  6. \n

    \n<\/li>\n

  7. \n

    console<\/span>.<\/span>log<\/span>(<\/span>user<\/span>);<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

  8. \n

    \n<\/li>\n

  9. \n

    \/\/ \u7ed3\u679c<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

  10. \n

    \/\/ [object Object]<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n<\/ol>\n

    \u54e6\uff01console.log() \u6ca1\u6709\u5e2e\u52a9\u6211\u4eec\u6253\u5370\u51fa\u671f\u671b\u7684\u7ed3\u679c\u3002\u5b83\u8f93\u51fa [object Object]\uff0c\u56e0\u4e3a\u4ece\u5bf9\u8c61\u5230\u5b57\u7b26\u4e32\u7684\u9ed8\u8ba4\u8f6c\u6362\u662f [object Object]\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u4f7f\u7528 JSON.stringify() \u9996\u5148\u5c06\u5bf9\u8c61\u8f6c\u6362\u6210\u5b57\u7b26\u4e32\uff0c\u7136\u540e\u5728\u63a7\u5236\u53f0\u4e2d\u6253\u5370\uff0c\u5982\u4e0b\u6240\u793a\u3002<\/p>\n

      \n
    1. \n

      const<\/span>\u00a0user <\/span>=<\/span> {<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

    2. \n

      \"name\"<\/span> :<\/span> \"Prateek Singh\"<\/span>,<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

    3. \n

      \"age\"<\/span> :<\/span> 26<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

    4. \n

      }<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

    5. \n

      \n<\/li>\n

    6. \n

      console<\/span>.<\/span>log<\/span>(<\/span>JSON<\/span>.<\/span>stringify<\/span>(<\/span>user<\/span>));<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

    7. \n

      \n<\/li>\n

    8. \n

      \/\/ \u7ed3\u679c<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

    9. \n

      \/\/ \"{ \"name\" : \"Prateek Singh\", \"age\" : 26 }\"<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n<\/ol>\n

      \u4e00\u822c\u6765\u8bf4\uff0c\u5f00\u53d1\u4eba\u5458\u4f7f\u7528 stringify \u51fd\u6570\u7684\u573a\u666f\u8f83\u4e3a\u666e\u904d\uff0c\u5c31\u50cf\u6211\u4eec\u5728\u4e0a\u9762\u505a\u7684\u90a3\u6837\u3002\u4f46\u6211\u8981\u544a\u8bc9\u4f60\u4e00\u4e9b\u9690\u85cf\u7684\u79d8\u5bc6\uff0c\u8fd9\u4e9b\u5c0f\u79d8\u5bc6\u4f1a\u8ba9\u4f60\u5f00\u53d1\u8d77\u6765\u66f4\u52a0\u8f7b\u677e\u3002<\/p>\n

      \u7b2c\u4e8c\u4e2a\u53c2\u6570\uff08\u6570\u7ec4\uff09<\/h4>\n

      \u662f\u7684\uff0cstringify \u51fd\u6570\u4e5f\u53ef\u4ee5\u6709\u7b2c\u4e8c\u4e2a\u53c2\u6570\u3002\u5b83\u662f\u8981\u5728\u63a7\u5236\u53f0\u4e2d\u6253\u5370\u7684\u5bf9\u8c61\u7684\u952e\u6570\u7ec4\u3002\u770b\u8d77\u6765\u5f88\u7b80\u5355\uff1f\u8ba9\u6211\u4eec\u66f4\u6df1\u5165\u4e00\u70b9\u3002\u6211\u4eec\u6709\u4e00\u4e2a\u5bf9\u8c61 product \u5e76\u4e14\u6211\u4eec\u60f3\u77e5\u9053 product \u7684 name \u5c5e\u6027\u503c\u3002\u5f53\u6211\u4eec\u5c06\u5176\u6253\u5370\u51fa\u6765\uff1a<\/p>\n

        \n
      1. \n

        console<\/span>.<\/span>log<\/span>(<\/span>JSON<\/span>.<\/span>stringify<\/span>(<\/span>product<\/span>));<\/span><\/span><\/code><\/span><\/p>\n<\/li>\n<\/ol>\n

        \u5b83\u4f1a\u8f93\u51fa\u4e0b\u9762\u7684\u7ed3\u679c\u3002<\/p>\n

          \n
        1. \n

          {<\/span>\"id\"<\/span>:<\/span>\"0001\"<\/span>,<\/span>\"type\"<\/span>:<\/span>\"donut\"<\/span>,<\/span>\"name\"<\/span>:<\/span>\"Cake\"<\/span>,<\/span>\"ppu\"<\/span>:<\/span>0.55<\/span>,<\/span>\"batters\"<\/span>:{<\/span>\"batter\"<\/span>:[{<\/span>\"id\"<\/span>:<\/span>\"1001\"<\/span>,<\/span>\"type\"<\/span>:<\/span>\"Regular\"<\/span>},{<\/span>\"id\"<\/span>:<\/span>\"1002\"<\/span>,<\/span>\"type\"<\/span>:<\/span>\"Chocolate\"<\/span>},{<\/span>\"id\"<\/span>:<\/span>\"1003\"<\/span>,<\/span>\"type\"<\/span>:<\/span>\"Blueberry\"<\/span>},{<\/span>\"id\"<\/span>:<\/span>\"1004\"<\/span>,<\/span>\"type\"<\/span>:<\/span>\"Devil\u2019s Food\"<\/span>}]},<\/span>\"topping\"<\/span>:[{<\/span>\"id\"<\/span>:<\/span>\"5001\"<\/span>,<\/span>\"type\"<\/span>:<\/span>\"None\"<\/span>},{<\/span>\"id\"<\/span>:<\/span>\"5002\"<\/span>,<\/span>\"type\"<\/span>:<\/span>\"Glazed\"<\/span>},{<\/span>\"id\"<\/span>:<\/span>\"5005\"<\/span>,<\/span>\"type\"<\/span>:<\/span>\"Sugar\"<\/span>},{<\/span>\"id\"<\/span>:<\/span>\"5007\"<\/span>,<\/span>\"type\"<\/span>:<\/span>\"Powdered Sugar\"<\/span>},{<\/span>\"id\"<\/span>:<\/span>\"5006\"<\/span>,<\/span>\"type\"<\/span>:<\/span>\"Chocolate with Sprinkles\"<\/span>},{<\/span>\"id\"<\/span>:<\/span>\"5003\"<\/span>,<\/span>\"type\"<\/span>:<\/span>\"Chocolate\"<\/span>},{<\/span>\"id\"<\/span>:<\/span>\"5004\"<\/span>,<\/span>\"type\"<\/span>:<\/span>\"Maple\"<\/span>}]}<\/span><\/span><\/code><\/span><\/p>\n<\/li>\n<\/ol>\n

          \u5728\u65e5\u5fd7\u4e2d\u5f88\u96be\u627e\u5230 name \u952e\uff0c\u56e0\u4e3a\u63a7\u5236\u53f0\u4e0a\u663e\u793a\u4e86\u5f88\u591a\u6ca1\u7528\u7684\u4fe1\u606f\u3002\u5f53\u5bf9\u8c61\u53d8\u5927\u65f6\uff0c\u67e5\u627e\u5c5e\u6027\u7684\u96be\u5ea6\u589e\u52a0\u3002stringify \u51fd\u6570\u7684\u7b2c\u4e8c\u4e2a\u53c2\u6570\u8fd9\u65f6\u5c31\u6709\u7528\u4e86\u3002\u8ba9\u6211\u4eec\u91cd\u5199\u4ee3\u7801\u5e76\u67e5\u770b\u7ed3\u679c\u3002<\/p>\n

            \n
          1. \n

            console<\/span>.<\/span>log<\/span>(<\/span>JSON<\/span>.<\/span>stringify<\/span>(<\/span>product<\/span>,[<\/span>'name'<\/span> ]);<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

          2. \n

            \n<\/li>\n

          3. \n

            \/\/ \u7ed3\u679c<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

          4. \n

            {<\/span>\"name\"<\/span> :<\/span> \"Cake\"<\/span>}<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n<\/ol>\n

            \u95ee\u9898\u89e3\u51b3\u4e86\uff0c\u4e0e\u6253\u5370\u6574\u4e2a JSON \u5bf9\u8c61\u4e0d\u540c\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u7b2c\u4e8c\u4e2a\u53c2\u6570\u4e2d\u5c06\u6240\u9700\u7684\u952e\u4f5c\u4e3a\u6570\u7ec4\u4f20\u9012\uff0c\u4ece\u800c\u53ea\u6253\u5370\u6240\u9700\u7684\u5c5e\u6027\u3002<\/p>\n

            \u7b2c\u4e8c\u4e2a\u53c2\u6570\uff08\u51fd\u6570\uff09<\/h4>\n

            \u6211\u4eec\u8fd8\u53ef\u4ee5\u4f20\u5165\u51fd\u6570\u4f5c\u4e3a\u7b2c\u4e8c\u4e2a\u53c2\u6570\u3002\u5b83\u6839\u636e\u51fd\u6570\u4e2d\u5199\u5165\u7684\u903b\u8f91\u6765\u8ba1\u7b97\u6bcf\u4e2a\u952e\u503c\u5bf9\u3002\u5982\u679c\u8fd4\u56de undefined\uff0c\u5219\u4e0d\u4f1a\u6253\u5370\u952e\u503c\u5bf9\u3002\u8bf7\u53c2\u8003\u793a\u4f8b\u4ee5\u83b7\u5f97\u66f4\u597d\u7684\u7406\u89e3\u3002<\/p>\n

              \n
            1. \n

              const<\/span>\u00a0user <\/span>=<\/span> {<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

            2. \n

              \"name\"<\/span> :<\/span> \"Prateek Singh\"<\/span>,<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

            3. \n

              \"age\"<\/span> :<\/span> 26<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

            4. \n

              }<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n<\/ol>\n

              \"JSON.stringify()<\/p>\n

                \n
              1. \n

                \/\/ \u7ed3\u679c<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

              2. \n

                {<\/span> \"age\"<\/span> :<\/span> 26<\/span> }<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n<\/ol>\n

                \u53ea\u6709 age \u88ab\u6253\u5370\u51fa\u6765\uff0c\u56e0\u4e3a\u51fd\u6570\u5224\u65ad typeOf \u4e3a String \u7684\u503c\u8fd4\u56de undefined\u3002<\/p>\n

                \u7b2c\u4e09\u4e2a\u53c2\u6570\u4e3a\u6570\u5b57<\/h4>\n

                \u7b2c\u4e09\u4e2a\u53c2\u6570\u63a7\u5236\u6700\u540e\u4e00\u4e2a\u5b57\u7b26\u4e32\u7684\u95f4\u8ddd\u3002\u5982\u679c\u53c2\u6570\u662f\u4e00\u4e2a\u6570\u5b57\uff0c\u5219\u5b57\u7b26\u4e32\u5316\u4e2d\u7684\u6bcf\u4e2a\u7ea7\u522b\u90fd\u5c06\u7f29\u8fdb\u8fd9\u4e2a\u6570\u91cf\u7684\u7a7a\u683c\u5b57\u7b26\u3002<\/p>\n

                  \n
                1. \n

                  \/\/ \u6ce8\u610f\uff1a\u4e3a\u4e86\u8fbe\u5230\u7406\u89e3\u7684\u76ee\u7684\uff0c\u4f7f\u7528 '--' \u66ff\u4ee3\u4e86\u7a7a\u683c<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

                2. \n

                  \n<\/li>\n

                3. \n

                  JSON<\/span>.<\/span>stringify<\/span>(<\/span>user<\/span>,<\/span> null<\/span>,<\/span> 2<\/span>);<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

                4. \n

                  \/\/{<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

                5. \n

                  \/\/--\"name\": \"Prateek Singh\",<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

                6. \n

                  \/\/--\"age\": 26,<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

                7. \n

                  \/\/--\"country\": \"India\"<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

                8. \n

                  \/\/}<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n<\/ol>\n

                  \u7b2c\u4e09\u4e2a\u53c2\u6570\u4e3a\u5b57\u7b26\u4e32<\/h4>\n

                  \u5982\u679c\u7b2c\u4e09\u4e2a\u53c2\u6570\u662f string\uff0c\u90a3\u4e48\u5c06\u4f7f\u7528\u5b83\u6765\u4ee3\u66ff\u4e0a\u9762\u663e\u793a\u7684\u7a7a\u683c\u5b57\u7b26\u3002<\/p>\n

                    \n
                  1. \n

                    JSON<\/span>.<\/span>stringify<\/span>(<\/span>user<\/span>,<\/span> null<\/span>,<\/span>'**'<\/span>);<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

                  2. \n

                    \/\/{<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

                  3. \n

                    \/\/**\"name\": \"Prateek Singh\",<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

                  4. \n

                    \/\/**\"age\": 26,<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

                  5. \n

                    \/\/**\"country\": \"India\"<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

                  6. \n

                    \/\/}<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

                  7. \n

                    \/\/ \u8fd9\u91cc * \u53d6\u4ee3\u4e86\u7a7a\u683c\u5b57\u7b26<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n<\/ol>\n

                    toJSON \u65b9\u6cd5<\/h4>\n

                    \u6211\u4eec\u6709\u4e00\u4e2a\u53eb toJSON \u7684\u65b9\u6cd5\uff0c\u5b83\u53ef\u4ee5\u4f5c\u4e3a\u4efb\u610f\u5bf9\u8c61\u7684\u5c5e\u6027\u3002JSON.stringify \u8fd4\u56de\u8fd9\u4e2a\u51fd\u6570\u7684\u7ed3\u679c\u5e76\u5bf9\u5176\u8fdb\u884c\u5e8f\u5217\u5316\uff0c\u800c\u4e0d\u662f\u5c06\u6574\u4e2a\u5bf9\u8c61\u8f6c\u6362\u4e3a\u5b57\u7b26\u4e32\u3002\u53c2\u8003\u4e0b\u9762\u7684\u4f8b\u5b50\u3002<\/p>\n

                      \n
                    1. \n

                      const<\/span>\u00a0user <\/span>=<\/span> {<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

                    2. \n

                      firstName <\/span>:<\/span> \"Prateek\"<\/span>,<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

                    3. \n

                      lastName <\/span>:<\/span> \"Singh\"<\/span>,<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

                    4. \n

                      age <\/span>:<\/span> 26<\/span>,<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

                    5. \n

                      toJSON<\/span>()<\/span> {<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

                    6. \n

                      return<\/span> {<\/span> <\/code><\/span><\/span><\/p>\n<\/li>\n

                    7. \n

                      fullName<\/span>:<\/span> `${this.firstName} + ${this.lastName}`<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

                    8. \n

                      };<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

                    9. \n

                      }<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

                    10. \n

                      }<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

                    11. \n

                      \n<\/li>\n

                    12. \n

                      console<\/span>.<\/span>log<\/span>(<\/span>JSON<\/span>.<\/span>stringify<\/span>(<\/span>user<\/span>));<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

                    13. \n

                      \n<\/li>\n

                    14. \n

                      \/\/ \u7ed3\u679c<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n

                    15. \n

                      \/\/ \"{ \"fullName\" : \"Prateek Singh\"}\"<\/span><\/code><\/span><\/span><\/p>\n<\/li>\n<\/ol>\n

                      \u8fd9\u91cc\u6211\u4eec\u53ef\u4ee5\u770b\u5230\uff0c\u5b83\u53ea\u6253\u5370 toJSON \u51fd\u6570\u7684\u7ed3\u679c\uff0c\u800c\u4e0d\u662f\u6253\u5370\u6574\u4e2a\u5bf9\u8c61\u3002<\/p>\n

                      \n<\/div>\n","protected":false},"excerpt":{"rendered":"

                      JSON.stringify() \u65b9\u6cd5\u80fd\u5c06\u4e00\u4e2a JavaScript \u5bf9\u8c61\u6216\u503c\u8f6c\u6362\u6210\u4e00\u4e2a JSON \u5b57\u7b26\u4e32\u3002 JSON.stringify() \u662f\u7528\u4e8e\u8c03\u8bd5\u7684\u6700\u5e38\u89c1\u51fd\u6570\u3002 \/\/\u521d\u59cb\u5316\u4e00\u4e2a user \u5bf9\u8c61 const\u00a0 user = { “name” : “Prateek Singh”, “age” : 26 } console.log(user); \/\/ \u7ed3\u679c \/\/ [object Object] \u54e6\uff01console.log() \u6ca1\u6709\u5e2e\u52a9\u6211\u4eec\u6253\u5370\u51fa\u671f\u671b\u7684\u7ed3\u679c\u3002\u5b83\u8f93\u51fa [object Object]\uff0c\u56e0\u4e3a\u4ece\u5bf9\u8c61\u5230\u5b57\u7b26\u4e32\u7684\u9ed8\u8ba4\u8f6c\u6362\u662f [object Object]\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u4f7f\u7528 JSON.stri …<\/p>\n","protected":false},"author":1,"featured_media":2714,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[9,6,23],"tags":[],"_links":{"self":[{"href":"https:\/\/www.195440.com\/wp-json\/wp\/v2\/posts\/2713"}],"collection":[{"href":"https:\/\/www.195440.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.195440.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.195440.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.195440.com\/wp-json\/wp\/v2\/comments?post=2713"}],"version-history":[{"count":5,"href":"https:\/\/www.195440.com\/wp-json\/wp\/v2\/posts\/2713\/revisions"}],"predecessor-version":[{"id":2721,"href":"https:\/\/www.195440.com\/wp-json\/wp\/v2\/posts\/2713\/revisions\/2721"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.195440.com\/wp-json\/wp\/v2\/media\/2714"}],"wp:attachment":[{"href":"https:\/\/www.195440.com\/wp-json\/wp\/v2\/media?parent=2713"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.195440.com\/wp-json\/wp\/v2\/categories?post=2713"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.195440.com\/wp-json\/wp\/v2\/tags?post=2713"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}