caojunfei
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">

    <title>Collapsible Tree Example</title>

    <style>

        .node circle {
            fill: #fff;
            stroke: steelblue;
            stroke-width: 3px;
        }

        .node text { font: 12px sans-serif; }

        .link {
            fill: none;
            stroke: #ccc;
            stroke-width: 2px;
        }

    </style>

</head>

<body>

<!-- load the d3.js library -->
<script src="http://d3js.org/d3.v3.min.js"></script>

<script>

    var data = [
        { "name" : "csdn.blog.world.python", "parent":"csdn.blog.world" },
        { "name" : "csdn.blog.world", "parent":"null" },
        { "name" : "csdn.blog.world.python_a", "parent":"csdn.blog.world.python" },
        { "name" : "csdn.blog.world.python_b", "parent":"csdn.blog.world.python" },
        { "name" : "csdn.blog.world.python_c", "parent":"csdn.blog.world.python" },
        { "name" : "csdn.blog.world.golang", "parent":"csdn.blog.world" },
        { "name" : "csdn.blog.world.c", "parent":"csdn.blog.world" },
        { "name" : "csdn.blog.world.java", "parent":"csdn.blog.world" }
    ];

    // *********** Convert flat data into a nice tree ***************
    // create a name: node map
    var dataMap = data.reduce(function(map, node) {
        map[node.name] = node;
        return map;
    }, {});

    // create the tree array
    var treeData = [];
    data.forEach(function(node) {
        // add to parent
        var parent = dataMap[node.parent];
        if (parent) {
            // create child array if it doesn't exist
            (parent.children || (parent.children = []))
            // add node to child array
                .push(node);
        } else {
            // parent is null or missing
            treeData.push(node);
        }
    });

    // ************** Generate the tree diagram	 *****************
    var margin = {top: 20, right: 120, bottom: 20, left: 120},
        width = 960 - margin.right - margin.left,
        height = 500 - margin.top - margin.bottom;

    var i = 0;
console.log(width,height);
width=2000;
height=1600;
    var tree = d3.layout.tree()
        .size([height, width]);

    var diagonal = d3.svg.diagonal()
        .projection(function(d) { return [d.y, d.x]; });

    var svg = d3.select("body").append("svg")
        .attr("width", width + margin.right + margin.left)
        .attr("height", height + margin.top + margin.bottom)
        .append("g")
        .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

    root = treeData[0];

    update(root);

    function update(source) {

        // Compute the new tree layout.
        var nodes = tree.nodes(root).reverse(),
            links = tree.links(nodes);

        // Normalize for fixed-depth.
        nodes.forEach(function(d) { d.y = d.depth * 180; });

        // Declare the nodes…
        var node = svg.selectAll("g.node")
            .data(nodes, function(d) { return d.id || (d.id = ++i); });

        // Enter the nodes.
        var nodeEnter = node.enter().append("g")
            .attr("class", "node")
            .attr("transform", function(d) {
                return "translate(" + d.y + "," + d.x + ")"; });

        nodeEnter.append("circle")
            .attr("r", 10)
            .style("fill", "#fff");

        nodeEnter.append("text")
            .attr("x", function(d) {
                return d.children || d._children ? -13 : 13; })
            .attr("dy", ".35em")
            .attr("text-anchor", function(d) {
                return d.children || d._children ? "end" : "start"; })
            .text(function(d) { return d.name; })
            .style("fill-opacity", 1);

        // Declare the links…
        var linkEnter = svg.selectAll("path.link").append("g")
            .data(links, function(d) { return d.target.id; });

        linkEnter.enter().insert("path", "g")//在指定元素之前插入一个元素
            .attr("class", "link")
            .attr("d", diagonal)
            // 首先为每条节点连线添加标识id
            .attr("id", function(d, i){
                return "mypath" + i;
            });

        //为连线添加文字
        linkEnter.enter().append('text')
            .attr('x', 90)
            .attr('y', 20)
            .style('fill', 'green')
            .style('font-size', '10px')
            .style('font-weight', 'bold')
            .append('textPath')
            .attr({//引用路径
                'xlink:href': function(d, i){
                    return "#mypath" + i;
                }
            })
            .text(function (d, i) {
                return i + '_Service.Pay()'
            });
    }
</script>
</body>
</html>