<%@ tag pageEncoding="UTF-8" isELIgnored="false" body-content="empty"%>
<%--自定義div容器id--%>
<%@attribute name="container" required="true" %>
<%--自定義標題--%>
<%@attribute name="title" required="true" %>
<%--自定義子標題--%>
<%@attribute name="subtitle" required="false" %>
<%--自定義數(shù)據(jù)請求url--%>
<%@attribute name="urls" required="true" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<script src="/echarts-2.1.8/build/dist/jquery.min.js"></script>
<script src="/echarts-2.1.8/build/dist/echarts-all.js"></script>
<script type="text/javascript">
  // 基于準備好的dom，初始化echarts圖表
  var myChart = echarts.init(document.getElementById('${container}'));
  var option={
    title : {
      text: '${title}',
      subtext: '${subtitle}'
    },
    tooltip : {
      trigger: 'axis'
    },
    legend: {
      data:[]
    },
    toolbox: {
      show : true,
      feature : {
        mark : {show: true},
        dataView : {show: true, readOnly: false},
        magicType : {show: true, type: ['line', 'bar']},
        restore : {show: true},
        saveAsImage : {show: true}
      }
    },
    calculable : true,
    xAxis : [
      {
        type : 'category',
        boundaryGap : false,
        data : []
      }
    ],
    yAxis : [
      {
        type : 'value',
        axisLabel : {
          formatter: '{value} '
        }
      }
    ],
    series : []
  };
  //采用ajax異步請求數(shù)據(jù)
  $.ajax({
    type:'post',
    url:'${urls}',
      dataType:'json',
      success:function(result){
        if(result){
          //將返回的category和series對象賦值給options對象內的category和series
          option.xAxis[0].data = result.axis;
          option.legend.data = result.legend;
          var series_arr=result.series;
          for(var i=0;i<series_arr.length;i++){
            option.series[i] = result.series[i];
          }
          myChart.hideLoading();
          myChart.setOption(option);
        }
       },
      error:function(errMsg){
        console.error("加載數(shù)據(jù)失敗")
      }
  });
  // 為echarts對象加載數(shù)據(jù)
  // myChart.setOption(option);
</script>

寫tag需要引入jstl包，谷歌下就有了。1.2之前需要兩個包，一個jstl，一個standard。1.2之后貌似合并為一個了。<%@ taglib prefix="c" uri=">這句的寫法也有點不同。為防萬一，我是引入的兩個包。

使用ajax請求，需要引入jquery的包，引入echarts的時候，同時引入這個。

在上面代碼中，最主要的還是標紅的那段，series是一個數(shù)組，后臺加入多組數(shù)據(jù)的時候，這里需要遍歷取出。

jsp頁面引入該標簽：

<%--
 Created by IntelliJ IDEA.
 User: Administrator
 Date: 2014/11/24
 Time: 12:02
 To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@taglib prefix="c" tagdir="/WEB-INF/tags" %>
<html>
<head>
  <title></title>
</head>
<body>
 <div id="main" style="height: 400px"></div>
 <c:linecharts container="main" title="測試標簽" subtitle="測試子標簽" urls="/tags"></c:linecharts>
</body>
</html>

前端的部分到此算是完成，然后就是后臺部分了。

后臺用兩個java對象，封裝一下要傳遞的數(shù)據(jù)

package bean.newseries;
import java.util.ArrayList;
import java.util.List;
/**
 * Created by on 2014/11/25.
 */
public class Echarts {
  public List<String> legend = new ArrayList<String>();//數(shù)據(jù)分組
  public List<String> axis = new ArrayList<String>();//橫坐標
  public List<Series> series = new ArrayList<Series>();//縱坐標
  public Echarts(List<String> legendList, List<String> categoryList, List<Series> seriesList) {
    super();
    this.legend = legendList;
    this.axis = categoryList;
    this.series = seriesList;
  }
}

這里放series的具體數(shù)據(jù)：

package bean.newseries;
import java.util.List;
/**
 * Created by on 2014/11/25.
 */
public class Series {
  public String name;
  public String type;
  public List<Integer> data;
  public Series(String name, String type, List<Integer> data) {
    this.name = name;
    this.type = type;
    this.data = data;
  }
}

后臺業(yè)務中，將自己的數(shù)據(jù)，放到對象中，然后轉換成json格式：

package tagservlet;
import bean.newseries.Echarts;
import bean.newseries.Series;
import com.fasterxml.jackson.databind.ObjectMapper;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
/**
 * Created by on 2014/11/24.
 */
public class NewTagServlet extends HttpServlet {
  protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    List<String> legend=new ArrayList<String>(Arrays.asList(new String[]{"最高值","最低值"}));
    List<String> axis=new ArrayList<String>(Arrays.asList(new String[]{"周一","周二","周三","周四","周五","周六","周日"}));
    List<Series> series=new ArrayList<Series>();
    series.add(new Series("最高值","line",new ArrayList<Integer>(Arrays.asList(21,23,28,26,21,33,44))));
    series.add(new Series("最低值","line",new ArrayList<Integer>(Arrays.asList(-2,-12,10,0,20,11,-6))));
    Echarts echarts=new Echarts(legend,axis,series);
    ObjectMapper objectMapper=new ObjectMapper();
    System.out.println(objectMapper.writeValueAsString(echarts));
    response.setContentType("text/html;charset=utf-8");
    PrintWriter out=response.getWriter();
    out.println(objectMapper.writeValueAsString(echarts));
    out.flush();
    out.close();
  }
  protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    this.doPost(request,response);
  }
}

效果圖如下：