这是我写的另一个版本来节省地图的空间，它将infowindow指针放在标记的实际纬度和长度上，而在显示infowindow时暂时隐藏标记。

它还取消了标准的“标记”分配，并加快了速度 通过直接将新标记分配给标记创建中的标记数组进行处理。但是请注意，标记和信息窗口都添加了额外的属性，所以这种方法有点不合常规……但那是我!

在这些信息窗口问题中从未提到，标准的信息窗口不是放在标记点的lat和lng上，而是放在标记图像的顶部。标记可见性必须隐藏，否则Maps API将再次将信息窗口锚推回标记图像的顶部。

对“标记”数组中的标记的引用在标记声明后立即创建，用于以后可能需要的任何额外处理任务(隐藏/显示，抓取坐标等)。这样就省去了将标记对象赋值给'marker'的额外步骤，然后将'marker'推到标记数组中…在我的书里有很多不必要的处理。

不管怎样，对信息窗口有不同的看法，希望它能帮助你了解和激励你。

    var locations = [
      ['Bondi Beach', -33.890542, 151.274856, 4],
      ['Coogee Beach', -33.923036, 151.259052, 5],
      ['Cronulla Beach', -34.028249, 151.157507, 3],
      ['Manly Beach', -33.80010128657071, 151.28747820854187, 2],
      ['Maroubra Beach', -33.950198, 151.259302, 1]
    ];
    var map;
    var markers = [];

    function init(){
      map = new google.maps.Map(document.getElementById('map_canvas'), {
        zoom: 10,
        center: new google.maps.LatLng(-33.92, 151.25),
        mapTypeId: google.maps.MapTypeId.ROADMAP
      });

      var num_markers = locations.length;
      for (var i = 0; i < num_markers; i++) {  
        markers[i] = new google.maps.Marker({
          position: {lat:locations[i][1], lng:locations[i][2]},
          map: map,
          html: locations[i][0],
          id: i,
        });

        google.maps.event.addListener(markers[i], 'click', function(){
          var infowindow = new google.maps.InfoWindow({
            id: this.id,
            content:this.html,
            position:this.getPosition()
          });
          google.maps.event.addListenerOnce(infowindow, 'closeclick', function(){
            markers[this.id].setVisible(true);
          });
          this.setVisible(false);
          infowindow.open(map);
        });
      }
    }

google.maps.event.addDomListener(window, 'load', init);

这是一个工作的JSFiddle

额外的注意 您将注意到在给定的谷歌示例数据中，'locations'数组中的第四个位置是一个数字。在这个例子中，你也可以使用这个值作为标记id来代替当前循环的值，这样…

var num_markers = locations.length;
for (var i = 0; i < num_markers; i++) {  
  markers[i] = new google.maps.Marker({
    position: {lat:locations[i][1], lng:locations[i][2]},
    map: map,
    html: locations[i][0],
    id: locations[i][3],
  });
};

var arr = new Array();
    function initialize() { 
        var i;  
        var Locations = [
                {
                  lat:48.856614, 
                  lon:2.3522219000000177, 
                  address:'Paris',
                  gval:'25.5',
                  aType:'Non-Commodity',
                  title:'Paris',
                  descr:'Paris'           
                },        
                    {
                  lat: 55.7512419, 
                  lon: 37.6184217,
                  address:'Moscow',
                  gval:'11.5',
                  aType:'Non-Commodity',
                  title:'Moscow',
                  descr:'Moscow Airport'              
                },     

                {
              lat:-9.481553000000002, 
              lon:147.190242, 
              address:'Port Moresby',
              gval:'1',
              aType:'Oil',
              title:'Papua New Guinea',
              descr:'Papua New Guinea 123123123'              
            },
            {
           lat:20.5200,
           lon:77.7500,
           address:'Indore',
            gval:'1',
            aType:'Oil',
            title:'Indore, India',
            descr:'Airport India'
        }
    ];

    var myOptions = {
        zoom: 2,
        center: new google.maps.LatLng(51.9000,8.4731),
        mapTypeId: google.maps.MapTypeId.ROADMAP
    };

    var map = new google.maps.Map(document.getElementById("map"), myOptions);

    var infowindow =  new google.maps.InfoWindow({
        content: ''
    });

    for (i = 0; i < Locations.length; i++) {
            size=15;        
            var img=new google.maps.MarkerImage('marker.png',           
                new google.maps.Size(size, size),
                new google.maps.Point(0,0),
                new google.maps.Point(size/2, size/2)
           );

        var marker = new google.maps.Marker({
            map: map,
            title: Locations[i].title,
            position: new google.maps.LatLng(Locations[i].lat, Locations[i].lon),           
                icon: img
        });

        bindInfoWindow(marker, map, infowindow, "<p>" + Locations[i].descr + "</p>",Locations[i].title);  

    }

}

function bindInfoWindow(marker, map, infowindow, html, Ltitle) { 
    google.maps.event.addListener(marker, 'mouseover', function() {
            infowindow.setContent(html); 
            infowindow.open(map, marker); 

    });
    google.maps.event.addListener(marker, 'mouseout', function() {
        infowindow.close();

    }); 
} 

完整的工作示例。你可以复制，粘贴和使用。

我想我将把这个放在这里，因为它似乎是那些开始使用谷歌地图API的一个流行的着陆点。在客户端呈现多个标记可能是许多映射应用程序性能下降的原因。很难进行基准测试、修复，在某些情况下甚至很难确定存在问题(由于浏览器实现的差异、客户端可用的硬件、移动设备等等)。

开始解决这个问题的最简单方法是使用标记集群解决方案。其基本思想是将地理上相似的位置分组，并显示点的数量。当用户放大地图时，这些组会展开，显示出下面的单个标记。

也许最简单的实现是markerclusterer库。基本实现如下(在库导入之后):

<script type="text/javascript">
  function initialize() {
    var center = new google.maps.LatLng(37.4419, -122.1419);

    var map = new google.maps.Map(document.getElementById('map'), {
      zoom: 3,
      center: center,
      mapTypeId: google.maps.MapTypeId.ROADMAP
    });

    var markers = [];
    for (var i = 0; i < 100; i++) {
      var location = yourData.location[i];
      var latLng = new google.maps.LatLng(location.latitude,
          location.longitude);
      var marker = new google.maps.Marker({
        position: latLng
      });
      markers.push(marker);
    }
    var markerCluster = new MarkerClusterer({map, markers});
  }
  google.maps.event.addDomListener(window, 'load', initialize);
</script>

标记不是直接添加到映射中，而是添加到数组中。然后将该数组传递给为您处理复杂计算的库，并将其附加到映射。

这些实现不仅极大地提高了客户端性能，而且在许多情况下，它们还会导致更简单、更整洁的UI，更容易在更大范围内消化数据。

谷歌提供了其他实现。

希望这能帮助到那些刚接触映射的人。

已接受的答案，在ES6中重写:

$(document).ready(() => {
  const mapEl = $('#our_map').get(0); // OR document.getElementById('our_map');

  // Display a map on the page
  const map = new google.maps.Map(mapEl, { mapTypeId: 'roadmap' });

  const buildings = [
    {
      title: 'London Eye, London', 
      coordinates: [51.503454, -0.119562],
      info: 'carousel'
    },
    {
      title: 'Palace of Westminster, London', 
      coordinates: [51.499633, -0.124755],
      info: 'palace'
    }
  ];

  placeBuildingsOnMap(buildings, map);
});


const placeBuildingsOnMap = (buildings, map) => {
  // Loop through our array of buildings & place each one on the map  
  const bounds = new google.maps.LatLngBounds();
  buildings.forEach((building) => {
    const position = { lat: building.coordinates[0], lng: building.coordinates[1] }
    // Stretch our bounds to the newly found marker position
    bounds.extend(position);

    const marker = new google.maps.Marker({
      position: position,
      map: map,
      title: building.title
    });

    const infoWindow = new google.maps.InfoWindow();
    // Allow each marker to have an info window
    google.maps.event.addListener(marker, 'click', () => {
      infoWindow.setContent(building.info);
      infoWindow.open(map, marker);
    })

    // Automatically center the map fitting all markers on the screen
    map.fitBounds(bounds);
  })
})

在程序中添加标记非常简单。你只需要添加以下代码:

var marker = new google.maps.Marker({
  position: myLatLng,
  map: map,
  title: 'Hello World!'
});

---

当你构造一个标记时，下面的字段是特别重要和经常设置的:

position(必选)指定标识标记初始位置的LatLng。检索LatLng的一种方法是使用地理编码服务。 map(可选)指定放置标记的map。如果在构建标记时没有指定映射，则会创建标记，但不会附加到(或显示在)映射上。稍后可以通过调用标记的setMap()方法添加标记。

注意，在本例中，标题字段设置了将作为工具提示显示的标记标题。

您可以在这里查阅谷歌api文档。

---

这是在地图中设置一个标记的完整示例。注意，你必须用你的谷歌API密钥替换YOUR_API_KEY:

<!DOCTYPE html>
<html>
<head>
   <meta name="viewport" content="initial-scale=1.0, user-scalable=no">
   <meta charset="utf-8">
   <title>Simple markers</title>
<style>
  /* Always set the map height explicitly to define the size of the div
   * element that contains the map. */
  #map {
    height: 100%;
  }
  /* Optional: Makes the sample page fill the window. */
  html, body {
    height: 100%;
    margin: 0;
    padding: 0;
  }
</style>
</head>
<body>
 <div id="map"></div>
<script>

  function initMap() {
    var myLatLng = {lat: -25.363, lng: 131.044};

    var map = new google.maps.Map(document.getElementById('map'), {
      zoom: 4,
      center: myLatLng
    });

    var marker = new google.maps.Marker({
      position: myLatLng,
      map: map,
      title: 'Hello World!'
    });
  }
</script>
<script async defer
src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap">
</script>

---

现在，如果你想在map中绘制数组的标记，你应该这样做:

var locations = [
  ['Bondi Beach', -33.890542, 151.274856, 4],
  ['Coogee Beach', -33.923036, 151.259052, 5],
  ['Cronulla Beach', -34.028249, 151.157507, 3],
  ['Manly Beach', -33.80010128657071, 151.28747820854187, 2],
  ['Maroubra Beach', -33.950198, 151.259302, 1]
];

function initMap() {
  var myLatLng = {lat: -33.90, lng: 151.16};

  var map = new google.maps.Map(document.getElementById('map'), {
    zoom: 10,
    center: myLatLng
    });

  var count;

  for (count = 0; count < locations.length; count++) {  
    new google.maps.Marker({
      position: new google.maps.LatLng(locations[count][1], locations[count][2]),
      map: map,
      title: locations[count][0]
      });
   }
}

---

这个例子给出了如下结果:

---

你也可以在你的pin中添加一个infoWindow。你只需要这段代码:

var marker = new google.maps.Marker({
    position: new google.maps.LatLng(locations[count][1], locations[count][2]),
    map: map
    });

marker.info = new google.maps.InfoWindow({
    content: 'Hello World!'
    });

你可以在这里找到谷歌关于infoWindows的文档。

---

现在，我们可以在标记像这样“点击”时打开infoWindow:

var marker = new google.maps.Marker({
     position: new google.maps.LatLng(locations[count][1], locations[count][2]),
     map: map
     });

marker.info = new google.maps.InfoWindow({
     content: locations [count][0]
     });


google.maps.event.addListener(marker, 'click', function() {  
    // this = marker
    var marker_map = this.getMap();
    this.info.open(marker_map, this);
    // Note: If you call open() without passing a marker, the InfoWindow will use the position specified upon construction through the InfoWindowOptions object literal.
            });

注意，您可以在谷歌developer中获得一些关于Listener的文档。

---

最后，如果用户点击它，我们可以在标记中绘制一个infoWindow。这是我的完整代码:

<!DOCTYPE html>
<html>
<head>
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no">
    <meta charset="utf-8">
    <title>Info windows</title>
    <style>
    /* Always set the map height explicitly to define the size of the div
    * element that contains the map. */
    #map {
        height: 100%;
    }
    /* Optional: Makes the sample page fill the window. */
    html, body {
        height: 100%;
        margin: 0;
        padding: 0;
    }
    </style>
</head>
<body>
    <div id="map"></div>
    <script>

    var locations = [
        ['Bondi Beach', -33.890542, 151.274856, 4],
        ['Coogee Beach', -33.923036, 151.259052, 5],
        ['Cronulla Beach', -34.028249, 151.157507, 3],
        ['Manly Beach', -33.80010128657071, 151.28747820854187, 2],
        ['Maroubra Beach', -33.950198, 151.259302, 1]
    ];


    // When the user clicks the marker, an info window opens.

    function initMap() {
        var myLatLng = {lat: -33.90, lng: 151.16};

        var map = new google.maps.Map(document.getElementById('map'), {
            zoom: 10,
            center: myLatLng
            });

        var count=0;


        for (count = 0; count < locations.length; count++) {  

            var marker = new google.maps.Marker({
                position: new google.maps.LatLng(locations[count][1], locations[count][2]),
                map: map
                });

            marker.info = new google.maps.InfoWindow({
                content: locations [count][0]
                });


            google.maps.event.addListener(marker, 'click', function() {  
                // this = marker
                var marker_map = this.getMap();
                this.info.open(marker_map, this);
                // Note: If you call open() without passing a marker, the InfoWindow will use the position specified upon construction through the InfoWindowOptions object literal.
                });
        }
    }
    </script>
    <script async defer
    src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap">
    </script>
</body>
</html>

---

通常，你会得到这样的结果:

来自谷歌Map API示例:

function initialize() {
  var myOptions = {
    zoom: 10,
    center: new google.maps.LatLng(-33.9, 151.2),
    mapTypeId: google.maps.MapTypeId.ROADMAP
  }
  var map = new google.maps.Map(document.getElementById("map_canvas"),
                                myOptions);

  setMarkers(map, beaches);
}

/**
 * Data for the markers consisting of a name, a LatLng and a zIndex for
 * the order in which these markers should display on top of each
 * other.
 */
var beaches = [
  ['Bondi Beach', -33.890542, 151.274856, 4],
  ['Coogee Beach', -33.923036, 151.259052, 5],
  ['Cronulla Beach', -34.028249, 151.157507, 3],
  ['Manly Beach', -33.80010128657071, 151.28747820854187, 2],
  ['Maroubra Beach', -33.950198, 151.259302, 1]
];

function setMarkers(map, locations) {
  // Add markers to the map

  // Marker sizes are expressed as a Size of X,Y
  // where the origin of the image (0,0) is located
  // in the top left of the image.

  // Origins, anchor positions and coordinates of the marker
  // increase in the X direction to the right and in
  // the Y direction down.
  var image = new google.maps.MarkerImage('images/beachflag.png',
      // This marker is 20 pixels wide by 32 pixels tall.
      new google.maps.Size(20, 32),
      // The origin for this image is 0,0.
      new google.maps.Point(0,0),
      // The anchor for this image is the base of the flagpole at 0,32.
      new google.maps.Point(0, 32));
  var shadow = new google.maps.MarkerImage('images/beachflag_shadow.png',
      // The shadow image is larger in the horizontal dimension
      // while the position and offset are the same as for the main image.
      new google.maps.Size(37, 32),
      new google.maps.Point(0,0),
      new google.maps.Point(0, 32));
      // Shapes define the clickable region of the icon.
      // The type defines an HTML <area> element 'poly' which
      // traces out a polygon as a series of X,Y points. The final
      // coordinate closes the poly by connecting to the first
      // coordinate.
  var shape = {
      coord: [1, 1, 1, 20, 18, 20, 18 , 1],
      type: 'poly'
  };
  for (var i = 0; i < locations.length; i++) {
    var beach = locations[i];
    var myLatLng = new google.maps.LatLng(beach[1], beach[2]);
    var marker = new google.maps.Marker({
        position: myLatLng,
        map: map,
        shadow: shadow,
        icon: image,
        shape: shape,
        title: beach[0],
        zIndex: beach[3]
    });
  }
}