5.JasperReports学习笔记5-其它数据生成动态的报表（WEB）

转自：http://www.blogjava.net/vjame/archive/2013/10/12/404908.html

一、空数据（Empty Datasources）
就是说JRXML文件里面的内容都是静态的,直接使用
JREmptyDataSource就行了
JasperRunManager.runReportToPdfStream(reportStream,  
servletOutputStream, new HashMap(), new JREmptyDataSource());

二、Map数组（Map Datasources）
有的时候数据不一定要从数据库里面来，还有可能从Map数组里面来成生Map[]的方法

private Map[] initializeMapArray()
{
//你可以把数组里面的每个map看成一个对象，就相于数据库里面的每个字段
HashMap[] reportRows = new HashMap[4];
HashMap row1Map = new HashMap();
HashMap row2Map = new HashMap();
HashMap row3Map = new HashMap();
HashMap row4Map = new HashMap();
row1Map.put("tail_num", "N263Y");
row1Map.put("aircraft_serial", "T-11");
row1Map.put("aircraft_model", "39 ROSCOE TRNR RACER");
row1Map.put("engine_model", "R1830 SERIES");
row2Map.put("tail_num", "N4087X");
row2Map.put("aircraft_serial", "BA100-163");
row2Map.put("aircraft_model", "BRADLEY AEROBAT");
row2Map.put("engine_model", "R2800 SERIES");
row3Map.put("tail_num", "N43JE");
row3Map.put("aircraft_serial", "HAYABUSA 1");
row3Map.put("aircraft_model", "NAKAJIMA KI-43 IIIA");
row3Map.put("engine_model", "R1830 SERIES");
row4Map.put("tail_num", "N912S");
row4Map.put("aircraft_serial", "9973CC");
row4Map.put("aircraft_model", "PA18-150");
row4Map.put("engine_model", "R-1820 SER");
reportRows[0] = row1Map;
reportRows[1] = row2Map;
reportRows[2] = row3Map;
reportRows[3] = row4Map;
return reportRows;
}

生成JRMapArrayDataSource对象
private JRDataSource createReportDataSource()  
{  
JRMapArrayDataSource dataSource;  
Map[] reportRows = initializeMapArray();  
dataSource = new JRMapArrayDataSource(reportRows);  
return dataSource;  
}

三、Map集合
 
private JRDataSource createReportDataSource()
{
JRMapCollectionDataSource dataSource;
Collection reportRows = initializeMapCollection();
dataSource = new JRMapCollectionDataSource(reportRows);
return dataSource;
}
private Collection initializeMapCollection()
{
ArrayList reportRows = new ArrayList();
HashMap row1Map = new HashMap();
HashMap row2Map = new HashMap();
HashMap row3Map = new HashMap();
HashMap row4Map = new HashMap();
row1Map.put("tail_num", "N263Y");
row1Map.put("aircraft_serial", "T-11");
row1Map.put("aircraft_model", "39 ROSCOE TRNR RACER");
row1Map.put("engine_model", "R1830 SERIES");
row2Map.put("tail_num", "N4087X");
row2Map.put("aircraft_serial", "BA100-163");
row2Map.put("aircraft_model", "BRADLEY AEROBAT");
row2Map.put("engine_model", "R2800 SERIES");
row3Map.put("tail_num", "N43JE");
row3Map.put("aircraft_serial", "HAYABUSA 1");
row3Map.put("aircraft_model", "NAKAJIMA KI-43 IIIA");
row3Map.put("engine_model", "R1830 SERIES");
row4Map.put("tail_num", "N912S");
row4Map.put("aircraft_serial", "9973CC");
row4Map.put("aircraft_model", "PA18-150");
row4Map.put("engine_model", "R-1820 SER");
reportRows.add(row1Map);
reportRows.add(row2Map);
reportRows.add(row3Map);
reportRows.add(row4Map);
return reportRows;
}

JRDataSource dataSource = createReportDataSource();  
JasperRunManager.runReportToPdfStream(reportStream,  
servletOutputStream, new HashMap(), dataSource);

四、对象数组（Java Objects as Datasources）对象JAVABEAN

private JRDataSource createReportDataSource()
{
JRBeanArrayDataSource dataSource;
AircraftData[] reportRows = initializeBeanArray();
dataSource = new JRBeanArrayDataSource(reportRows);
return dataSource;
}

private AircraftData[] initializeBeanArray()
{
AircraftData[] reportRows = new AircraftData[4];
reportRows[0] = new AircraftData("N263Y", "T-11", "39 ROSCOE TRNR
RACER", "R1830 SERIES");
reportRows[1] = new AircraftData("N4087X", "BA100-163", "BRADLEY
AEROBAT", "R2800 SERIES");
reportRows[2] = new AircraftData("N43JE", "HAYABUSA 1", "NAKAJIMA
KI-43 IIIA", "R1830 SERIES");
reportRows[3] = new AircraftData("N912S", "9973CC", "PA18-150",
"R-1820 SER");
return reportRows;
}

//最后servlet里面调用
JRDataSource dataSource = createReportDataSource();
JasperRunManager.runReportToPdfStream(reportStream,
servletOutputStream, new HashMap(), dataSource);

五、对象集合
和对象数组基本上一样,就是最后生成的是JRBeanCollectionDataSource

private JRDataSource createReportDataSource()
{
JRBeanCollectionDataSource dataSource;
Collection reportRows = initializeBeanCollection();
dataSource = new JRBeanCollectionDataSource(reportRows);
return dataSource;
}

JRDataSource dataSource = createReportDataSource();
JasperRunManager.runReportToPdfStream(reportStream,
servletOutputStream, new HashMap(), dataSource);

六、XML数据成生报表（XML as Datasource）

JRXmlDataSource xmlDataSource = new JRXmlDataSource(
new BufferedInputStream(getServletConfig().getServletContext()
.getResourceAsStream("/reports/AircraftData.xml")),
"/AircraftData/aircraft");

七、json数据源

 List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();

         Map<String, Object> row1 = new HashMap<String, Object>();
         Map<String, Object> row2 = new HashMap<String, Object>();

         Map<String, Object> row = new HashMap<String, Object>();
         row.put("field1", "001");
         row.put("field2", "张三");
         row.put("field3", "中国上海");
         row.put("field4", "field4");
         row.put("field5", "field5");
         list.add(row);
         row = new HashMap<String, Object>();
         row.put("field1", "002");
         row.put("field2", "李四");
         row.put("field3", "中国杭州");
         row.put("field4", "field4");
         row.put("field5", "field5");
         list.add(row);
         row = new HashMap<String, Object>();
         row.put("field1", "003");
         row.put("field2", "王五");
         row.put("field3", "中国南昌");
         row.put("field4", "field4");
         row.put("field5", "field5");
         list.add(row);

         row2.put("uAnswer", list);
         row1.put("qNaire", row2);

         JSONObject jsonObject = JSONObject.fromObject(row1);
         String json = jsonObject.toString();

         Map<String, Object> jasperPara = new HashMap<String, Object>();
         jasperPara.put("TITLE", "json数据报表演示样例（20131012）");
         InputStream is = new ByteArrayInputStream(json.getBytes());
         jasperPara.put("JSON_INPUT_STREAM", is);
         jasperPara.put(JsonQueryExecuterFactory.JSON_LOCALE, Locale.CHINA);
         jasperPara.put(JRParameter.REPORT_LOCALE, Locale.CHINA);

json数据

{"qNaire": {
          "uAnswer": [
            {
              "field1": "001",    
              "field2": "张三",    
              "field3": "中国上海",    
              "field4": "field4",
              "field5": "field5",
            },
            {
              "field1": "002",
              "field2": "李四",
              "field3": "中国杭州",
              "field4": "field4",
              "field5": "field5",
            },
            {
              "field1": "003",
              "field2": "王五",
              "field3": "中国南昌",
              "field4": "field4",
              "field5": "field5",
          }
          ]
        }}

ireport配置截图：