{"id":694,"date":"2014-05-05T00:20:57","date_gmt":"2014-05-04T16:20:57","guid":{"rendered":"http:\/\/www.menglanglang.cn\/?p=694"},"modified":"2016-06-04T16:43:54","modified_gmt":"2016-06-04T08:43:54","slug":"ajax%e5%9f%ba%e7%a1%80","status":"publish","type":"post","link":"http:\/\/www.menglanglang.cn\/?p=694","title":{"rendered":"Ajax\u57fa\u7840"},"content":{"rendered":"

AJAX\u4e0d\u662f\u4e00\u79cd\u8bed\u8a00\uff0c\u53ea\u662f\u4e00\u79cd\u6280\u672f\uff0c\u4e0d\u662f\u65b0\u6280\u672f\uff0c\u53ea\u662f\u4e00\u4e9b\u5df2\u6709\u6280\u672f\u7684\u7efc\u5408\u800c\u5df2\u3002<\/strong><\/p>\n

JS\u4e2d\u7684Ajax\u4ee3\u7801\uff1a<\/p>\n

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\n
Code<\/strong>\u00a0\u00a0\u00a0View<\/a>Print<\/a><\/div>\n<\/div>\n
    \n
  1. \/\/\u00a0\u521b\u5efa\u5f02\u6b65\u8bf7\u6c42\u5bf9\u8c61<\/span>\u00a0\u00a0<\/span><\/span><\/li>\n
  2. var<\/span>\u00a0xmlHttp;\u00a0\u00a0<\/span><\/span><\/li>\n
  3. function<\/span>\u00a0createXMLHttpRequest()\u00a0{\u00a0\u00a0<\/span><\/span><\/li>\n
  4. \u00a0\u00a0\u00a0\u00a0if<\/span>\u00a0(window.ActiveXObject)\u00a0{\u00a0\u00a0<\/span><\/span><\/li>\n
  5. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0xmlHttp\u00a0=\u00a0new<\/span>\u00a0ActiveXObject(<\/span>\"Microsoft.XMLHTTP\"<\/span>);\u00a0\u00a0<\/span><\/span><\/li>\n
  6. \u00a0\u00a0\u00a0\u00a0}\u00a0else<\/span>\u00a0<\/span>if<\/span>\u00a0(window.XMLHttpRequest)\u00a0{\u00a0\u00a0<\/span><\/span><\/li>\n
  7. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0xmlHttp\u00a0=\u00a0new<\/span>\u00a0XMLHttpRequest();\u00a0\u00a0<\/span><\/span><\/li>\n
  8. \u00a0\u00a0\u00a0\u00a0}\u00a0\u00a0<\/span><\/li>\n
  9. }\u00a0\u00a0<\/span><\/li>\n
  10. \u00a0\u00a0<\/span><\/li>\n
  11. \/\/\u00a0\u70b9\u51fb\u8d85\u94fe\u8c03\u7528\u51fd\u6570<\/span>\u00a0\u00a0<\/span><\/span><\/li>\n
  12. function<\/span>\u00a0showMsg()\u00a0{\u00a0\u00a0<\/span><\/span><\/li>\n
  13. \u00a0\u00a0\u00a0\u00a0\/\/\u00a0\u521b\u5efa\u5f02\u6b65\u8bf7\u6c42\u5bf9\u8c61<\/span>\u00a0\u00a0<\/span><\/span><\/li>\n
  14. \u00a0\u00a0\u00a0\u00a0createXMLHttpRequest();\u00a0\u00a0<\/span><\/li>\n
  15. \u00a0\u00a0\u00a0\u00a0\/\/\u00a0\u7ed1\u5b9aAjax\u56de\u8c03\u5904\u7406\u51fd\u6570\uff0c\u7528\u4e8e\u5904\u7406\u670d\u52a1\u5668\u7aef\u7684\u76f8\u5e94<\/span>\u00a0\u00a0<\/span><\/span><\/li>\n
  16. \u00a0\u00a0\u00a0\u00a0xmlHttp.onreadystatechange\u00a0=\u00a0myFun;\u00a0\u00a0<\/span><\/li>\n
  17. \u00a0\u00a0\u00a0\u00a0\/\/\u00a0\u5efa\u7acb\u4e0e\u670d\u52a1\u5668\u901a\u4fe1\u7684\u8fde\u63a5<\/span>\u00a0\u00a0<\/span><\/span><\/li>\n
  18. \u00a0\u00a0\u00a0\u00a0xmlHttp.open(\"POST\"<\/span>,\u00a0<\/span>\"message\"<\/span>);\u00a0\u00a0<\/span><\/span><\/li>\n
  19. \u00a0\u00a0\u00a0\u00a0\/\/\u00a0\u53c2\u6570\u4e3anull\uff0c\u5982\u679cget\u65b9\u5f0f\u9700\u8981\u53c2\u6570\uff0c\u76f4\u63a5\u7528\uff1f\u4f20\u503c\u5373\u53ef\u3002<\/span>\u00a0\u00a0<\/span><\/span><\/li>\n
  20. \u00a0\u00a0\u00a0\u00a0\/\/\u00a0\u5982\u679c\u662fpost\u65b9\u5f0f\uff0c\u6709\u53c2\u6570\u65f6\u5373\u53ef\u5728send\u4e2d\u52a0\u5165\u53c2\u6570<\/span>\u00a0\u00a0<\/span><\/span><\/li>\n
  21. \u00a0\u00a0\u00a0\u00a0xmlHttp.send(null<\/span>);\u00a0\u00a0<\/span><\/span><\/li>\n
  22. }\u00a0\u00a0<\/span><\/li>\n
  23. \u00a0\u00a0<\/span><\/li>\n
  24. \/\/\u00a0\u56de\u8c03\u5904\u7406\u51fd\u6570<\/span>\u00a0\u00a0<\/span><\/span><\/li>\n
  25. function<\/span>\u00a0myFun()\u00a0{\u00a0\u00a0<\/span><\/span><\/li>\n
  26. \u00a0\u00a0\u00a0\u00a0if<\/span>\u00a0(xmlHttp.readyState\u00a0==\u00a04\u00a0&&\u00a0xmlHttp.status\u00a0==\u00a0200)\u00a0{\u00a0\u00a0<\/span><\/span><\/li>\n
  27. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0document.getElementById(\"show\"<\/span>).innerHTML\u00a0=\u00a0xmlHttp.responseText;\u00a0\u00a0<\/span><\/span><\/li>\n
  28. \u00a0\u00a0\u00a0\u00a0}\u00a0\u00a0<\/span><\/li>\n
  29. }\u00a0\u00a0<\/span><\/li>\n<\/ol>\n<\/div>\n

    \u901a\u8fc7\u4ee5\u4e0a\u7b80\u5355\u5b9e\u4f8b\u53ef\u4ee5\u770b\u51fa\uff0c\u8981\u4f7f\u7528Ajax\uff0c\u9996\u5148\u9700\u8981\u521b\u5efa\u5f02\u6b65\u8bf7\u6c42\u5bf9\u8c61\uff0c\u53ef\u4ee5\u770b\u51fa\u5728\u4e0d\u540c\u7684\u6d4f\u89c8\u5668\u4e0b\uff0c\u521b\u5efa\u5bf9\u8c61\u7684\u65b9\u5f0f\u6709\u6240\u4e0d\u540c\u3002<\/p>\n

    \u521b\u5efa\u5bf9\u8c61\u5b8c\u6210\u540e\uff0c\u9700\u8981\u7ed1\u5b9a\u56de\u8c03\u51fd\u6570\u3002\u7136\u540e\u662f\u901a\u8fc7 GET \u6216\u8005 POST \u65b9\u5f0f\u63d0\u4ea4\u6570\u636e\u5230\u670d\u52a1\u5668\uff0c\u5982\u679c\u662f GET \u65b9\u5f0f\uff0c\u6709\u53c2\u6570\u65f6\u76f4\u63a5\u7528\u95ee\u53f7\u4f20\u503c\uff1b\u5982\u679c\u662f POST \u65b9\u5f0f\u63d0\u4ea4\u6570\u636e\uff0c\u6709\u53c2\u6570\u65f6\uff0c\u5219\u628a\u53c2\u6570\u653e\u5230\u00a0send(\u53c2\u6570)\u00a0<\/em>\u4e2d\u3002\u5982\u4e0b\uff1a<\/p>\n

    \n
    \n
    Code<\/strong>\u00a0\u00a0\u00a0View<\/a>Print<\/a><\/div>\n<\/div>\n
      \n
    1. \/\/\u00a0\u68c0\u67e5\u59d3\u540d\uff08GET\u65b9\u5f0f\uff09<\/span>\u00a0\u00a0<\/span><\/span><\/li>\n
    2. function<\/span>\u00a0checkname()\u00a0{\u00a0\u00a0<\/span><\/span><\/li>\n
    3. \u00a0\u00a0\u00a0\u00a0createXMLHttpRequest();\u00a0\u00a0<\/span><\/li>\n
    4. \u00a0\u00a0\u00a0\u00a0xmlHttp.onreadystatechange\u00a0=\u00a0myFun;\u00a0\u00a0<\/span><\/li>\n
    5. \u00a0\u00a0\u00a0\u00a0xmlHttp.open(\"GET\"<\/span>,\u00a0<\/span>\"regist?uname=\"<\/span>\u00a0+\u00a0document.getElementsByName(<\/span>\"uname\"<\/span>)[0].value);\u00a0\u00a0<\/span><\/span><\/li>\n
    6. \u00a0\u00a0\u00a0\u00a0xmlHttp.send(null<\/span>);\u00a0\u00a0<\/span><\/span><\/li>\n
    7. }\u00a0\u00a0<\/span><\/li>\n<\/ol>\n<\/div>\n
      \n
      \n
      Code<\/strong>\u00a0\u00a0\u00a0View<\/a>Print<\/a><\/div>\n<\/div>\n
        \n
      1. \/\/\u00a0\u8c03\u7528\u51fd\u6570\uff08POST\u65b9\u5f0f\uff09<\/span>\u00a0\u00a0<\/span><\/span><\/li>\n
      2. function<\/span>\u00a0showMsg2()\u00a0{\u00a0\u00a0<\/span><\/span><\/li>\n
      3. \u00a0\u00a0\u00a0\u00a0\/\/\u00a0\u521b\u5efa\u5f02\u6b65\u8bf7\u6c42\u5bf9\u8c61<\/span>\u00a0\u00a0<\/span><\/span><\/li>\n
      4. \u00a0\u00a0\u00a0\u00a0createXMLHttpRequest();\u00a0\u00a0<\/span><\/li>\n
      5. \u00a0\u00a0\u00a0\u00a0\/\/\u00a0\u7ed1\u5b9aAjax\u56de\u8c03\u5904\u7406\u51fd\u6570\uff0c\u7528\u4e8e\u5904\u7406\u670d\u52a1\u5668\u7aef\u7684\u76f8\u5e94<\/span>\u00a0\u00a0<\/span><\/span><\/li>\n
      6. \u00a0\u00a0\u00a0\u00a0xmlHttp.onreadystatechange\u00a0=\u00a0myFun;\u00a0\u00a0<\/span><\/li>\n
      7. \u00a0\u00a0\u00a0\u00a0\/\/\u00a0JS\u8fdb\u884c\u8f6c\u7801<\/span>\u00a0\u00a0<\/span><\/span><\/li>\n
      8. \u00a0\u00a0\u00a0\u00a0var<\/span>\u00a0args\u00a0=\u00a0<\/span>\"uname=\"<\/span>\u00a0+\u00a0document.getElementsByName(<\/span>\"uname2\"<\/span>)[0].value;\u00a0\u00a0<\/span><\/span><\/li>\n
      9. \u00a0\u00a0\u00a0\u00a0xmlHttp.open(\"POST\"<\/span>,\u00a0<\/span>\"mycode\"<\/span>);\u00a0\u00a0<\/span><\/span><\/li>\n
      10. \u00a0\u00a0\u00a0\u00a0\/\/\u00a0\u53c2\u6570\u4e3anull\uff0c\u5982\u679cget\u65b9\u5f0f\u9700\u8981\u53c2\u6570\uff0c\u76f4\u63a5\u7528\uff1f\u4f20\u503c\u5373\u53ef\u3002<\/span>\u00a0\u00a0<\/span><\/span><\/li>\n
      11. \u00a0\u00a0\u00a0\u00a0\/\/\u00a0\u5982\u679c\u662fpost\u65b9\u5f0f\uff0c\u6709\u53c2\u6570\u65f6\u5373\u53ef\u5728send\u4e2d\u52a0\u5165\u53c2\u6570<\/span>\u00a0\u00a0<\/span><\/span><\/li>\n
      12. \u00a0\u00a0\u00a0\u00a0xmlHttp.send(args);\u00a0\u00a0<\/span><\/li>\n
      13. }\u00a0\u00a0<\/span><\/li>\n<\/ol>\n<\/div>\n

         <\/p>\n

        \u4ece\u540e\u53f0\u8fd4\u56de\u7684\u7ed3\u679c\u5728\u00a0xmlHttp.responseText<\/em> \u4e2d\uff0c\u7528\u4e8e\u524d\u53f0\u753b\u9762\u7684\u663e\u793a\u3002<\/p>\n

        \u540e\u53f0\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n

        \n
        \n
        Code<\/strong>\u00a0\u00a0\u00a0View<\/a>Print<\/a><\/div>\n<\/div>\n
          \n
        1. package<\/span>\u00a0com.langtuteng.test;\u00a0\u00a0<\/span><\/span><\/li>\n
        2. \u00a0\u00a0<\/span><\/li>\n
        3. import<\/span>\u00a0java.io.IOException;\u00a0\u00a0<\/span><\/span><\/li>\n
        4. import<\/span>\u00a0java.io.PrintWriter;\u00a0\u00a0<\/span><\/span><\/li>\n
        5. \u00a0\u00a0<\/span><\/li>\n
        6. import<\/span>\u00a0javax.servlet.ServletException;\u00a0\u00a0<\/span><\/span><\/li>\n
        7. import<\/span>\u00a0javax.servlet.http.HttpServlet;\u00a0\u00a0<\/span><\/span><\/li>\n
        8. import<\/span>\u00a0javax.servlet.http.HttpServletRequest;\u00a0\u00a0<\/span><\/span><\/li>\n
        9. import<\/span>\u00a0javax.servlet.http.HttpServletResponse;\u00a0\u00a0<\/span><\/span><\/li>\n
        10. \u00a0\u00a0<\/span><\/li>\n
        11. public<\/span>\u00a0<\/span>class<\/span>\u00a0MessageServlet\u00a0<\/span>extends<\/span>\u00a0HttpServlet\u00a0{\u00a0\u00a0<\/span><\/span><\/li>\n
        12. \u00a0\u00a0<\/span><\/li>\n
        13. \u00a0\u00a0\u00a0\u00a0public<\/span>\u00a0<\/span>void<\/span>\u00a0doGet(HttpServletRequest\u00a0request,\u00a0HttpServletResponse\u00a0response)\u00a0\u00a0<\/span><\/span><\/li>\n
        14. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0throws<\/span>\u00a0ServletException,\u00a0IOException\u00a0{\u00a0\u00a0<\/span><\/span><\/li>\n
        15. \u00a0\u00a0<\/span><\/li>\n
        16. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0response.setContentType(\"text\/html\"<\/span>);\u00a0\u00a0<\/span><\/span><\/li>\n
        17. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0response.setCharacterEncoding(\"UTF-8\"<\/span>);\u00a0\u00a0<\/span><\/span><\/li>\n
        18. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0PrintWriter\u00a0out\u00a0=\u00a0response.getWriter();\u00a0\u00a0<\/span><\/li>\n
        19. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0out.println(\"\u4f60\u597d\uff0cAjax\uff01(GET\u65b9\u5f0f\u63d0\u4ea4)\"<\/span>);\u00a0\u00a0<\/span><\/span><\/li>\n
        20. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0out.flush();\u00a0\u00a0<\/span><\/li>\n
        21. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0out.close();\u00a0\u00a0<\/span><\/li>\n
        22. \u00a0\u00a0\u00a0\u00a0}\u00a0\u00a0<\/span><\/li>\n
        23. \u00a0\u00a0<\/span><\/li>\n
        24. \u00a0\u00a0\u00a0\u00a0public<\/span>\u00a0<\/span>void<\/span>\u00a0doPost(HttpServletRequest\u00a0request,\u00a0HttpServletResponse\u00a0response)\u00a0\u00a0<\/span><\/span><\/li>\n
        25. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0throws<\/span>\u00a0ServletException,\u00a0IOException\u00a0{\u00a0\u00a0<\/span><\/span><\/li>\n
        26. \u00a0\u00a0<\/span><\/li>\n
        27. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0response.setContentType(\"text\/html\"<\/span>);\u00a0\u00a0<\/span><\/span><\/li>\n
        28. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0response.setCharacterEncoding(\"UTF-8\"<\/span>);\u00a0\u00a0<\/span><\/span><\/li>\n
        29. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0PrintWriter\u00a0out\u00a0=\u00a0response.getWriter();\u00a0\u00a0<\/span><\/li>\n
        30. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0out.println(\"\u4f60\u597d\uff0cAjax\uff01(POST\u65b9\u5f0f\u63d0\u4ea4)\"<\/span>);\u00a0\u00a0<\/span><\/span><\/li>\n
        31. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0out.flush();\u00a0\u00a0<\/span><\/li>\n
        32. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0out.close();\u00a0\u00a0<\/span><\/li>\n
        33. \u00a0\u00a0\u00a0\u00a0}\u00a0\u00a0<\/span><\/li>\n
        34. \u00a0\u00a0<\/span><\/li>\n
        35. }\u00a0\u00a0<\/span><\/li>\n<\/ol>\n<\/div>\n

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

          AJAX\u4e0d\u662f\u4e00\u79cd\u8bed\u8a00\uff0c\u53ea\u662f\u4e00\u79cd\u6280\u672f\uff0c\u4e0d\u662f\u65b0\u6280\u672f\uff0c\u53ea\u662f\u4e00\u4e9b\u5df2\u6709\u6280\u672f\u7684\u7efc\u5408\u800c\u5df2\u3002 JS\u4e2d\u7684Ajax\u4ee3\u7801\uff1a Code […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[430],"tags":[216,420,159],"class_list":["post-694","post","type-post","status-publish","format-standard","hentry","category-web","tag-ajax","tag-js-2","tag-web"],"_links":{"self":[{"href":"http:\/\/www.menglanglang.cn\/index.php?rest_route=\/wp\/v2\/posts\/694","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.menglanglang.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.menglanglang.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.menglanglang.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.menglanglang.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=694"}],"version-history":[{"count":1,"href":"http:\/\/www.menglanglang.cn\/index.php?rest_route=\/wp\/v2\/posts\/694\/revisions"}],"predecessor-version":[{"id":2749,"href":"http:\/\/www.menglanglang.cn\/index.php?rest_route=\/wp\/v2\/posts\/694\/revisions\/2749"}],"wp:attachment":[{"href":"http:\/\/www.menglanglang.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=694"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.menglanglang.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=694"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.menglanglang.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=694"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}