Ireport+struts2+javabean数据源子报表

  Ireport+struts2+javabean数据源解决子报表问题一直很难搞,前2天我终于解决了。(*^__^*) 嘻嘻……
  其实我们一直弄不通,并不是程序的问题,而是报表设计的时候一些参数没有设置正确。把理论搞清楚一切问题迎刃而解。

举个例子说明问题:

一、po类
  User.java
package com.ansure.moudle;

import java.util.List;

public class User {
	private int u_id;
	private String u_name;
	private String u_pwd;
	private List addresses;

	public User() {
	}

	public User(int id, String name, String pwd, List addresses) {
		this.u_id = id;
		this.u_name = name;
		this.u_pwd = pwd;
		this.addresses = addresses;
	}

	public int getU_id() {
		return u_id;
	}

	public void setU_id(int uId) {
		u_id = uId;
	}


	public List getAddresses() {
		return addresses;
	}

	public void setAddresses(List addresses) {
		this.addresses = addresses;
	}

	public String getU_name() {
		return u_name;
	}

	public void setU_name(String uName) {
		u_name = uName;
	}

	public String getU_pwd() {
		return u_pwd;
	}

	public void setU_pwd(String uPwd) {
		u_pwd = uPwd;
	}

}


  Address.java
package com.ansure.moudle;

public class Address {
	
	private User user;
	
	private String address;
	
	private String zip;
	
	private String email;

	/**
	 * 
	 */
	public Address() {
		super();
		// TODO Auto-generated constructor stub
	}

	/**
	 * @param address
	 * @param zip
	 * @param email
	 */
	public Address(User user, String address, String zip, String email) {
		this.user = user;
		this.address = address;
		this.zip = zip;
		this.email = email;
	}
	
	
	public String getAddress() {
		return address;
	}

	public void setAddress(String address) {
		this.address = address;
	}

	public String getEmail() {
		return email;
	}

	public void setEmail(String email) {
		this.email = email;
	}

	public User getUser() {
		return user;
	}

	public void setUser(User user) {
		this.user = user;
	}

	public String getZip() {
		return zip;
	}

	public void setZip(String zip) {
		this.zip = zip;
	}
	
}

  这个报表想展示的就是一个这样的结果,报表的上半部分为用户的基本信息,下半部门为用户的地址信息,因为用户的联系地址可能有多个,所以我们想到了用子报表的形式来实现。

二、实现的java类
package com.ansure.action;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import com.ansure.moudle.Address;
import com.ansure.moudle.User;
import com.opensymphony.xwork2.ActionSupport;

public class TestAction extends ActionSupport {
	private static final long serialVersionUID = 1L;
	private List<User> userList = new ArrayList<User> ();
	public Map<String,Object> map = new HashMap<String,Object>();

	//普遍报表
	public String reportUserInfo() {
		try {
			userList= getDateSouce();
		} catch (Exception e) {
			e.printStackTrace();
			return ERROR;
		}
		return SUCCESS;
	}
	//带子报表的报表,通过参数传递子报表数据源
	public String reportUserAddress(){
		try {
			userList= getDateSouce();
			
			List sublist = getSubDateSouce();
			map.put("sublist", sublist);
		} catch (Exception e) {
			e.printStackTrace();
			return ERROR;
		}
		return SUCCESS;
	}
//	带子报表的报表,通过主报数据源对象的属性参数传递子表数据源(不可行)
	public String reportUserAllInfo(){
		try {
			userList= getAllDateSouce();
		} catch (Exception e) {
			e.printStackTrace();
			return ERROR;
		}
		return SUCCESS;
	}
	private List getDateSouce()throws Exception{
		List list = new ArrayList();
		try{
			User user = new User();
			user.setU_id(1);
			user.setU_name("吴明");
			user.setU_pwd("123456");
			list.add(user);
			
			return list;
		}catch(Exception e){
			e.printStackTrace();
			return null;			
		}	
	}
	private List getSubDateSouce()throws Exception{
		List sublist = new ArrayList();
		try{
			Address add1 = new Address();
			add1.setZip("100000");
			add1.setAddress("北京市**********");
			add1.setEmail("[email protected]");			
			sublist.add(add1);
			
			Address add2 = new Address();
			add2.setZip("200000");
			add2.setAddress("上海市**********");
			add2.setEmail("[email protected]");
			sublist.add(add2);
			
			Address add3 = new Address();
			add3.setZip("300000");
			add3.setAddress("天津市**********");
			add3.setEmail("[email protected]");
			sublist.add(add3);
			
			
			return sublist;
		}catch(Exception e){
			e.printStackTrace();
			return null;			
		}		
	}
	
	private List getAllDateSouce()throws Exception{
		List list = new ArrayList();
		List sublist = new ArrayList();
		try{
			User user1 = new User();
			user1.setU_id(1);
			user1.setU_name("吴明");
			user1.setU_pwd("123456");
			
			Address add1 = new Address();
			add1.setZip("100000");
			add1.setAddress("北京市**********");
			add1.setEmail("[email protected]");			
			sublist.add(add1);
			
			Address add2 = new Address();
			add2.setZip("200000");
			add2.setAddress("上海市**********");
			add2.setEmail("[email protected]");
			sublist.add(add2);
			
			Address add3 = new Address();
			add3.setZip("300000");
			add3.setAddress("天津市**********");
			add3.setEmail("[email protected]");
			sublist.add(add3);
			
			user1.setAddresses(sublist);
			list.add(user1);
			
			User user2 = new User();
			user1.setU_id(2);
			user1.setU_name("张三");
			user1.setU_pwd("121212");
			
			List sublist2 = new ArrayList();
			sublist2.add(add3);
			sublist2.add(add2);
			user2.setAddresses(sublist2);
			
			list.add(user2);
			
			return list;
		}catch(Exception e){
			e.printStackTrace();
			return null;			
		}		
	}

	public List<User> getUserList() {
		return userList;
	}

	public void setUserList(List<User> userList) {
		this.userList = userList;
	}
	public Map<String, Object> getMap() {
		return map;
	}
	public void setMap(Map<String, Object> map) {
		this.map = map;
	}
	
	
}


上面代码提供3个方法,第二个方法是本文要讲的内容。userList为主报表数据源,而子报表数据源是作为参数传递的。在ireport中把这个参数作为子报表的数据源(new net.sf.jasperreports.engine.data.JRBeanCollectionDataSource($P{sublist}))传递过去

三、配置文件
struts.xml
<struts>
	<!-- 设置使用JasperReports的Action -->
	<package name="C06.3"
		extends="struts-default,jasperreports-default">
		<action name="reportUserInfo" class="com.ansure.action.TestAction" method="reportUserInfo">
			<!-- result类型设置为jasper -->
			<result name="success" type="jasper">
				<!-- 编译后的jasper文件路径 -->
				<param name="location">
					/jasperreports/testReport.jasper
				</param>
				<!-- 视图界面中显示的数据的数据源 -->
				<param name="dataSource">userList</param>
				<!-- 报表生成格式 -->
				<param name="format">PDF</param>
			</result>			
		</action>

		<action name="reportUserAddress" class="com.ansure.action.TestAction" method="reportUserAddress">
			<!-- result类型设置为jasper -->
			<result name="success" type="jasper">
				<!-- 编译后的jasper文件路径 -->
				<param name="location">
					/jasperreports/test_mainReport.jasper
				</param>
				<!-- 视图界面中显示的数据的数据源 -->
				<param name="dataSource">userList</param>
				<param name="reportParameters">map</param>	
				<!-- 报表生成格式 -->
				<param name="format">PDF</param>
			</result>			
		</action>
		
		<action name="reportUserAllInfo" class="com.ansure.action.TestAction" method="reportUserAllInfo">
			<!-- result类型设置为jasper -->
			<result name="success" type="jasper">
				<!-- 编译后的jasper文件路径 -->
				<param name="location">
					/jasperreports/testReport.jasper
				</param>
				<!-- 视图界面中显示的数据的数据源 -->
				<param name="dataSource">userList</param>
				<!-- 报表生成格式 -->
				<param name="format">PDF</param>
			</result>			
		</action>
		
	</package>
</struts>


四、Ireport模板

设计模板的基础知识就不再多说了,说下几个注意的地方
  • 建议以javabean作为数据源时,主报表和子报表模板分别设计比较好。主报表添加子报表时选择已存在的子报表就可以了。Ireport+struts2+javabean数据源子报表
  • 因为程序为主报表传过来一个参数,比如sublist,所以要在主报表中添加参数sublist,并且通过参数属性界面更改参数类型(默认为String类型的),更改为java.lang.List.Ireport+struts2+javabean数据源子报表
  • 打开在主报表中添加的子报表控件的属性面板,查看connection type 属性,选择Use a datasource expression 选项[*]打开在主报表中添加的子报表控件的属性面板,查看Data Source Expression属性,填写new net.sf.jasperreports.engine.data.JRBeanCollectionDataSource($P{sublist})。。Ireport+struts2+javabean数据源子报表
  • 如果有多个子报表,需要顺序输出到页面,而且你又不确定每个子报表的所占高度,那么建议把子报表放在分组中。分组时可以添加多个header和fooder的,所以你也可以添加多个子报表。Ireport+struts2+javabean数据源子报表        


子报表
Ireport+struts2+javabean数据源子报表

运行结果
Ireport+struts2+javabean数据源子报表
五、未解决问题
  我在做这个测试前看了一个帖子,帖子的说明的是ireport以javabean为数据源解决子报表问题,用的是javabean+sevlet的结构。使用的方法和我提供的reportUserAllInfo原理相同,但是这个方法在struts2这个框架下没有测试通过(在我这里是这样的)。有没有人知道怎么解决?

Bug如下:
引用
javax.servlet.ServletException: Error evaluating expression :
Source text : new net.sf.jasperreports.engine.data.JRBeanCollectionDataSource($F{addresses})

引用
org.codehaus.groovy.runtime.typehandling.GroovyCastException: Cannot cast object 'org.apache.struts2.views.jasperreports.ValueStackDataSource@1159cd1' with class 'org.apache.struts2.views.jasperreports.ValueStackDataSource' to class 'java.util.List'
org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.castToType(DefaultTypeTransformation.java:340)


六、%>_<%,上传不了了呐。不过代码都贴出来了,lib文件的下载在struts2+ireport学习小结(一)和(二)中。http://hanxin830311.iteye.com/blog/763511和http://hanxin830311.iteye.com/blog/763628

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