注：java导出报表与web项目显示报表方法其实是相同的，只不过有一句代码不同,如下
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html.setParameter(JRHtmlExporterParameter.OUTPUT_FILE_NAME,
"C:/Users/Administrator/Desktop/ireport/report1.html");
//生成文件
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//html.setParameter(JRHtmlExporterParameter.OUTPUT_WRITER,response.getWriter()); // web页面显示
maven依赖
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<!-- iReport JasperReports -->
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<dependency>
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<groupId>net.sf.jasperreports</groupId>
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<artifactId>jasperreports</artifactId>
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<version>
5.6.0</version>
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</dependency>
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<dependency>
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<groupId>org.codehaus.groovy</groupId>
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<artifactId>groovy-all</artifactId>
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<version>
2.2.2</version>
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</dependency>
通过java代码生成各种格式报表文件
JDBC文件
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package com.hlzt.test;
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-
import java.sql.Connection;
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import java.sql.DriverManager;
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import java.sql.ResultSet;
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import java.sql.Statement;
-
-
public
class JDBC {
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public
static String driver=
"com.mysql.jdbc.Driver";
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public
static String url=
"jdbc:mysql://localhost:3306/senyuan1";
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public
static String user=
"root";
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public
static String pwd=
"123456";
-
public
static Connection conn=getConnection();
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public
static Statement statement=getStatement();
-
-
private static Connection getConnection(){
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if(conn==
null){
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try{
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Class.forName(driver);
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conn=DriverManager.getConnection(url,user,pwd);
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}
catch(Exception e){
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e.printStackTrace();
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}
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}
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return conn;
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}
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private static Statement getStatement(){
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if(statement==
null){
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try{
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statement=conn.createStatement();
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}
catch(Exception e){
-
e.printStackTrace();
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}
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}
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return statement;
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}
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public static ResultSet getResultSet(String sql){
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ResultSet rs=
null;
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try{
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rs=statement.executeQuery(sql);
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}
catch(Exception e){
-
e.printStackTrace();
-
}
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return rs;
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}
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public static void closeAll(ResultSet rs,Statement st,Connection cn){
-
try{
-
if(rs!=
null){
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rs.close();
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}
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if(st!=
null){
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st.close();
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}
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if(cn!=
null){
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cn.close();
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}
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}
catch(Exception e){
-
e.printStackTrace();
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}
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}
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}
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package com.hlzt.test;
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import java.io.File;
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import java.io.IOException;
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import java.io.InputStream;
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import java.util.HashMap;
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import java.util.Map;
-
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import javax.servlet.ServletContext;
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import javax.servlet.ServletException;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import net.sf.jasperreports.engine.JRExporterParameter;
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import net.sf.jasperreports.engine.JasperCompileManager;
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import net.sf.jasperreports.engine.JasperFillManager;
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import net.sf.jasperreports.engine.JasperPrint;
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import net.sf.jasperreports.engine.JasperReport;
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import net.sf.jasperreports.engine.export.JRHtmlExporter;
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import net.sf.jasperreports.engine.export.JRHtmlExporterParameter;
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import net.sf.jasperreports.engine.util.JRLoader;
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@SuppressWarnings(
"deprecation")
-
public
class TestReport {
-
-
public static void main(String[] args) {
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service();
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}
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//protected void service(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {\
-
protected static void service(){
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try{
-
//ServletContext context = this.getServletConfig().getServletContext();
-
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//JasperCompileManager 编译管理器
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//JasperFillManager 填充管理器
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//JRXmlLoader xml加载器
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//JasperPrintManager 打印管理器
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//JasperExportManager 导出管理器
-
-
//JasperCompileManager.compileReportToFile(context.getRealPath("/reports/DbReport.jrxml"));//编译jrxml文件，生成jasper文件
-
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Map map=
new HashMap();
//参数map
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map.put(
"userName",
"admin");
-
-
//生成jrprint文件
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//JasperFillManager.fillReportToFile(context.getRealPath("/reports/DbReport.jasper"), map, JDBC.conn);
-
-
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File jasperFile=
new File(
"C:/Users/Administrator/Desktop/ireport/report1.jasper");
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JasperReport jasperReport =(JasperReport)JRLoader.loadObject(jasperFile);
-
JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, map,JDBC.conn);
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File file=
new File(
"C:/Users/Administrator/Desktop/ireport/report1.html");
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//生成html
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JRHtmlExporter html =
new JRHtmlExporter();
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html.setParameter(JRHtmlExporterParameter.JASPER_PRINT, jasperPrint);
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html.setParameter(JRHtmlExporterParameter.OUTPUT_FILE_NAME,
"C:/Users/Administrator/Desktop/ireport/report1.html");
//生成文件
-
//html.setParameter(JRHtmlExporterParameter.OUTPUT_WRITER,response.getWriter()); // web页面显示
-
html.setParameter(JRHtmlExporterParameter.IS_USING_IMAGES_TO_ALIGN,Boolean.FALSE);
-
html.setParameter(JRExporterParameter.CHARACTER_ENCODING,
"utf-8");
-
html.exportReport();
-
//生成excel
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/*
-
JRXlsExporter xls=new JRXlsExporter();
-
*/
-
//生成pdf
-
/*
-
JRPdfExporter pdf = new JRPdfExporter();
-
*/
-
}
catch(Exception e){
-
e.printStackTrace();
-
}
-
}
-
}
与javaweb整合
本文用的是JasperReport最新版本6.0
JasperReport官网：community.jaspersoft.com
web开发建议下载JasperReports library --> jasperreports-xxx-project 里面包含demo以及api
项目结构：
jar包：新手可以把下载下来的所有jar包都放进去，熟练之后可以根据自己所需加入相关jar包
WebRoot下：新建reports文件夹，用来存放jrxml、jasper文件；build.xml(放入进去之后会出现蚂蚁图标)；
jrxml文件代码，此代码是xml格式文件，可以自己手写，也可以安装 iReport设计编译成jasper文件，为了入门下面纯手写
DbReport.jrxml：
后台代码：TestServlet.java
JDBC:
执行效果：html数据
