基础知识请自行百度查看，以下直接贴出实现代码：
<%@ page pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<title>ECharts</title>
<% String year = request.getParameter("riskYear");
String actionType = request.getParameter("actionType");
%>
</head>
<body>
<div );
}
});
</script>
</body>
</html>
后台代码实现如下：
package com.riskintegrator.servlet.report; import java.io.IOException; import java.io.PrintWriter; import java.util.ArrayList; import java.util.List; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import net.sf.json.JSONArray; import net.sf.json.JSONObject; import com.riskintegrator.ejb.user.UserData; import com.riskintegrator.slsb.lem.LEMBD; import com.riskintegrator.slsb.report.EchartForm; import com.riskintegrator.slsb.report.EchartRiskBD; import com.riskintegrator.slsb.report.SeriesForm; import edu.emory.mathcs.backport.java.util.Collections; public class EchartsServlet extends HttpServlet { private static final long serialVersionUID = -6497480146173707253L; protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doPost(request,response); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String jsonString = ""; try { HttpSession session = request.getSession(true); UserData udt = (UserData)session.getAttribute("user"); String orgID = udt.getorgID(); String year = request.getParameter("year"); String actionType = request.getParameter("actionType"); LEMBD LBD = new LEMBD(); String companyOrgId = LBD.getCompanyId(orgID); EchartRiskBD BD = new EchartRiskBD(); List<EchartForm> riskOrgList = BD.getAllRiskMessageByCondition(year,companyOrgId); if(riskOrgList.size() == 0){ JSONArray json = new JSONArray(); jsonString = json.toString(); }else if("riskAssess".equalsIgnoreCase(actionType)){ jsonString = doriskAssess(riskOrgList); }else if("riskKPI".equalsIgnoreCase(actionType)){ jsonString = doriskKPI(riskOrgList); }else if("Assessment".equalsIgnoreCase(actionType)){ jsonString = doAssessment(riskOrgList); }else if("riskControl".equalsIgnoreCase(actionType)){ jsonString = doriskControl(riskOrgList); } } catch (Exception e) { } response.setContentType("text/html;charset=utf-8"); PrintWriter out=response.getWriter(); out.println(jsonString); out.flush(); out.close(); } public String doriskAssess(List<EchartForm> riskOrgList) throws Exception{ //{"低","中","较高","高"} List<String> legendList = new ArrayList<String>(); //设置legend颜色 List<String> legendColorList = new ArrayList<String>(); //category--orgName List<String> categoryList = new ArrayList<String>(); //orgid List<String> orgIdList = new ArrayList<String>(); //series List<SeriesForm> seriesList = new ArrayList<SeriesForm>(); //设置legend数组 legendList.add("低"); //这里的名称必须和series的每一组series的name保持一致 legendList.add("中"); legendList.add("较高"); legendList.add("高"); //设置颜色 legendColorList.add("#0C0"); legendColorList.add("#FFC"); legendColorList.add("#FC3"); legendColorList.add("#F00"); SeriesForm series1 = new SeriesForm(); series1.setId(1); series1.setName("低"); series1.setType("bar"); List<Integer> seriesData1 = new ArrayList<Integer>(); SeriesForm series2 = new SeriesForm(); series2.setId(2); series2.setName("中"); series2.setType("bar"); List<Integer> seriesData2 = new ArrayList<Integer>(); SeriesForm series3 = new SeriesForm(); series3.setId(3); series3.setName("较高"); series3.setType("bar"); List<Integer> seriesData3 = new ArrayList<Integer>(); SeriesForm series4 = new SeriesForm(); series4.setId(4); series4.setName("高"); series4.setType("bar"); List<Integer> seriesData4 = new ArrayList<Integer>(); EchartsComparator comparator=new EchartsComparator("riskAssess"); Collections.sort(riskOrgList, comparator); for(EchartForm form : riskOrgList){ orgIdList.add(form.getOrgid());//机构ID //加入category categoryList.add(form.getOrgName());//机构名称 //加入数据值series序列数组 这里提供为了效果只提供一组series数据好了 seriesData1.add(Integer.parseInt(form.getSCORE_LEVEL1()));//风险评估--低 seriesData2.add(Integer.parseInt(form.getSCORE_LEVEL2()));//风险评估--中 seriesData3.add(Integer.parseInt(form.getSCORE_LEVEL3()));//风险评估--较高 seriesData4.add(Integer.parseInt(form.getSCORE_LEVEL4()));//风险评估--高 } series1.setData(seriesData1); series2.setData(seriesData2); series3.setData(seriesData3); series4.setData(seriesData4); seriesList.add(series1); seriesList.add(series2); seriesList.add(series3); seriesList.add(series4); JSONArray json = new JSONArray(); JSONObject jo = new JSONObject(); jo.put("legend", legendList); jo.put("legendColorList", legendColorList); jo.put("orgId", orgIdList); jo.put("category", categoryList); jo.put("series", seriesList); json.add(jo); return json.toString(); } public String doriskKPI(List<EchartForm> riskOrgList) throws Exception{ //{"低","中","较高","高"} List<String> legendList = new ArrayList<String>(); //设置legend颜色 List<String> legendColorList = new ArrayList<String>(); //category--orgName List<String> categoryList = new ArrayList<String>(); //orgid List<String> orgIdList = new ArrayList<String>(); //series List<SeriesForm> seriesList = new ArrayList<SeriesForm>(); //设置legend数组 legendList.add("低"); //这里的名称必须和series的每一组series的name保持一致 legendList.add("中"); legendList.add("较高"); legendList.add("高"); //设置颜色 legendColorList.add("#0C0"); legendColorList.add("#FFC"); legendColorList.add("#FC3"); legendColorList.add("#F00"); SeriesForm series1 = new SeriesForm(); series1.setId(1); series1.setName("低"); series1.setType("bar"); List<Integer> seriesData1 = new ArrayList<Integer>(); SeriesForm series2 = new SeriesForm(); series2.setId(2); series2.setName("中"); series2.setType("bar"); List<Integer> seriesData2 = new ArrayList<Integer>(); SeriesForm series3 = new SeriesForm(); series3.setId(3); series3.setName("较高"); series3.setType("bar"); List<Integer> seriesData3 = new ArrayList<Integer>(); SeriesForm series4 = new SeriesForm(); series4.setId(4); series4.setName("高"); series4.setType("bar"); List<Integer> seriesData4 = new ArrayList<Integer>(); EchartsComparator comparator=new EchartsComparator("riskKPI"); Collections.sort(riskOrgList, comparator); for(EchartForm form : riskOrgList){ orgIdList.add(form.getOrgid());//机构ID //加入category categoryList.add(form.getOrgName());//机构名称 //加入数据值series序列数组 这里提供为了效果只提供一组series数据好了 seriesData1.add(Integer.parseInt(form.getKRI_LEVEL1()));//风险指标--低 seriesData2.add(Integer.parseInt(form.getKRI_LEVEL2()));//风险指标--中 seriesData3.add(Integer.parseInt(form.getKRI_LEVEL3()));//风险指标--较高 seriesData4.add(Integer.parseInt(form.getKRI_LEVEL4()));//风险指标--高 } series1.setData(seriesData1); series2.setData(seriesData2); series3.setData(seriesData3); series4.setData(seriesData4); seriesList.add(series1); seriesList.add(series2); seriesList.add(series3); seriesList.add(series4); JSONArray json = new JSONArray(); JSONObject jo = new JSONObject(); jo.put("legend", legendList); jo.put("orgId", orgIdList); jo.put("legendColorList", legendColorList); jo.put("category", categoryList); jo.put("series", seriesList); json.add(jo); return json.toString(); } public String doAssessment(List<EchartForm> riskOrgList) throws Exception{ //{"问题缺陷"} List<String> legendList = new ArrayList<String>(); //设置legend颜色 List<String> legendColorList = new ArrayList<String>(); //category--orgName List<String> categoryList = new ArrayList<String>(); //orgid List<String> orgIdList = new ArrayList<String>(); //series List<SeriesForm> seriesList = new ArrayList<SeriesForm>(); //设置legend数组 legendList.add("问题缺陷"); //这里的名称必须和series的每一组series的name保持一致 //设置颜色 legendColorList.add("#F63"); SeriesForm series1 = new SeriesForm(); series1.setId(1); series1.setName("问题缺陷"); series1.setType("bar"); List<Integer> seriesData1 = new ArrayList<Integer>(); EchartsComparator comparator=new EchartsComparator("Assessment"); Collections.sort(riskOrgList, comparator); for(EchartForm form : riskOrgList){ orgIdList.add(form.getOrgid());//机构ID //加入category categoryList.add(form.getOrgName());//机构名称 //加入数据值series序列数组 这里提供为了效果只提供一组series数据好了 seriesData1.add(Integer.parseInt(form.getISS_LEVEL1()));//检查评价--问题缺陷 } series1.setData(seriesData1); seriesList.add(series1); JSONArray json = new JSONArray(); JSONObject jo = new JSONObject(); jo.put("legend", legendList); jo.put("orgId", orgIdList); jo.put("legendColorList", legendColorList); jo.put("category", categoryList); jo.put("series", seriesList); json.add(jo); return json.toString(); } public String doriskControl(List<EchartForm> riskOrgList) throws Exception{ //{"有效","失效"} List<String> legendList = new ArrayList<String>(); //设置legend颜色 List<String> legendColorList = new ArrayList<String>(); //category--orgName List<String> categoryList = new ArrayList<String>(); //orgid List<String> orgIdList = new ArrayList<String>(); //series List<SeriesForm> seriesList = new ArrayList<SeriesForm>(); //设置legend数组 legendList.add("有效"); //这里的名称必须和series的每一组series的name保持一致 legendList.add("失效"); //设置颜色 legendColorList.add("#0C0"); legendColorList.add("#F63"); SeriesForm series1 = new SeriesForm(); series1.setId(1); series1.setName("有效"); series1.setType("bar"); List<Integer> seriesData1 = new ArrayList<Integer>(); SeriesForm series2 = new SeriesForm(); series2.setId(2); series2.setName("失效"); series2.setType("bar"); List<Integer> seriesData2 = new ArrayList<Integer>(); EchartsComparator comparator=new EchartsComparator("riskControl"); Collections.sort(riskOrgList, comparator); for(EchartForm form : riskOrgList){ orgIdList.add(form.getOrgid());//机构ID //加入category categoryList.add(form.getOrgName());//机构名称 //加入数据值series序列数组 这里提供为了效果只提供一组series数据好了 seriesData1.add(Integer.parseInt(form.getCM_LEVEL1()));//控制监测--有效 seriesData2.add(Integer.parseInt(form.getCM_LEVE2()));//控制监测--失效 } series1.setData(seriesData1); series2.setData(seriesData2); seriesList.add(series1); seriesList.add(series2); JSONArray json = new JSONArray(); JSONObject jo = new JSONObject(); jo.put("legend", legendList); jo.put("orgId", orgIdList); jo.put("legendColorList", legendColorList); jo.put("category", categoryList); jo.put("series", seriesList); json.add(jo); return json.toString(); } }