填报监听类中实现修改报表原纪录执行insert操作（一）
问题背景
客户希望用户在修改填报表中数据的时候，若修改的字段为对应数据表的主键，则报表提交时该记录执行insert操作；若修改的字段为非主键，则报表提交时执行update操作。
问题分析
当前润乾报表对于修改报表原有数据后进行填报，都执行update操作，无论修改的字段是主键还是非主键，要想实现上面问题背景中提到的需求，我们可以考虑不使用报表的更新属性设置，而是自己写sql进行数据库操作。
我们可以使用自定义更新类进行处理，而本例是在填报监听类中做的，好处是因为填报监听类中的beforeSave()和afterSave()方法处理问题的灵活性较强。接下来我们看一下具体实现。
实现步骤
1、 做报表
做一张简单的填报表，本例使用报表自带的demo数据源，报表制作时需注意，将报表属性中的【数据提交方案】修改为 全部单元格，不设置任何更新属性，如下图：
2、 写填报监听类：CustomInputListener.java
① 循环报表行列，判断主键是否被修改
② 将修改主键的行号放到ArrayList中，未修改主键的行号放到另外ArrayList中
③ 遍历两个ArrayList，对修改主键的行进行insert操作；未修改主键的行进行update操作。
（源码见附在本文最后）
3、写发布报表的jsp
在发布报表的标签中配置：inputListener=”runqian.CustomInputListener”
附：
填报监听类 CustomInputListener.java
package runqian;
import java.sql.*;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import com.runqian.report4.usermodel.Context;
import com.runqian.report4.usermodel.INormalCell;
import com.runqian.report4.usermodel.input.AbstractInputListener;
public class CustomInputListener extends AbstractInputListener {
public void beforeSave() throws Exception {
//获取报表行列数
int row = report.getRowCount();
int col = report.getColCount();
INormalCell iCell;
Object oldObject;
Object inputObject;
String oldString;
String inputString;
List<Integer> listOldLine = new ArrayList<Integer>();// 存放主鍵未被修改行
List<Integer> listInputLine = new ArrayList<Integer>();// 存放主鍵被修改行
for (int i = 2; i <= row; i++) {// 从数据区开始
for (int j = 1; j <= 2; j++) {// j的最大值为主键个数，即第一列和第二列为主键
iCell = report.getCell(i, (short) j);
oldObject = iCell.getValue();
inputObject = iCell.getInputValue();
if (oldObject == null) {
oldString = “”;
} else {
oldString = oldObject.toString();
}
if (inputObject == null) {
inputString = “”;
} else {
inputString = inputObject.toString();
}
if (!oldString.equals(inputString)) {// 主键被修改
listInputLine.add(i);//若存在多个主键，则list中会有重复值，用的时候需去除重复
}
}
}
//将未改变主键值放入list，有重复值，使用时需去重
for (int i = 2; i <= row; i++) {
if (!listInputLine.contains(i)) {
listOldLine.add(i);
}
}
// 去除List中的重复数据
listOldLine = new NotRepeatedList<Integer>(listOldLine);
listInputLine = new NotRepeatedList<Integer>(listInputLine);
// 根据主键是否被修改，更新数据库
Context cxt = new Context();
Connection conn = null;
Statement stmt = null;
ResultSet rs = null;
//定义存储要更新的各字段值
String CUSTOMER_ID = “”;
String CUSTOMER_NAME = “”;
String CUSTOMERTYPE = “”;
String PROVINCE = “”;
String CITY = “”;
String TEL = “”;
String sql1 = “”;
String sql2 = “”;
int size = 0;
try {
conn = cxt.getConnectionFactory(“demo”).getConnection();
stmt = conn.createStatement();
//主键被修改的行，执行insert操作
for (int i = 0; i < listInputLine.size(); i++) {
size = listInputLine.get(i);
CUSTOMER_ID = (report.getCell(size, (short) 1).getInputValue()==null?”":report.getCell(size, (short) 1).getInputValue().toString());
CUSTOMER_NAME = (report.getCell(size, (short) 2).getInputValue()==null?”":report.getCell(size, (short) 2).getInputValue().toString());
CUSTOMERTYPE = (report.getCell(size, (short) 3).getInputValue()==null?”":report.getCell(size, (short) 3).getInputValue().toString());
PROVINCE = (report.getCell(size, (short) 4).getInputValue()==null?”":report.getCell(size, (short) 4).getInputValue().toString());
CITY = (report.getCell(size, (short) 5).getInputValue()==null?”":report.getCell(size, (short) 5).getInputValue().toString());
TEL = (report.getCell(size, (short) 6).getInputValue()==null?”":report.getCell(size, (short) 6).getInputValue().toString());
sql1 = “insert into CUSTOMER(CUSTOMER_ID,CUSTOMER_NAME,CUSTOMERTYPE,PROVINCE,CITY,TEL) values(” +
“‘” +CUSTOMER_ID+”‘,’”+CUSTOMER_NAME+”‘,’”+CUSTOMERTYPE+”‘,’”+PROVINCE+”‘,’”+CITY+”‘,’”+TEL+”‘”
+”)”;
System.out.println(“sql:”+sql1);
stmt.executeUpdate(sql1);
conn.commit();
}
//主键未修改行，执行update操作
for(int i=0;i<listOldLine.size();i++){
size = listOldLine.get(i);
CUSTOMER_ID = (report.getCell(size, (short) 1).getInputValue()==null?”":report.getCell(size, (short) 1).getInputValue().toString());
CUSTOMER_NAME = (report.getCell(size, (short) 2).getInputValue()==null?”":report.getCell(size, (short) 2).getInputValue().toString());
CUSTOMERTYPE = (report.getCell(size, (short) 3).getInputValue()==null?”":report.getCell(size, (short) 3).getInputValue().toString());
PROVINCE = (report.getCell(size, (short) 4).getInputValue()==null?”":report.getCell(size, (short) 4).getInputValue().toString());
CITY = (report.getCell(size, (short) 5).getInputValue()==null?”":report.getCell(size, (short) 5).getInputValue().toString());
TEL = (report.getCell(size, (short) 6).getInputValue()==null?”":report.getCell(size, (short) 6).getInputValue().toString());
sql2 = “update CUSTOMER set CUSTOMER_ID=’”+CUSTOMER_ID+”‘,CUSTOMER_NAME=’”+CUSTOMER_NAME+”‘,CUSTOMERTYPE=’”+CUSTOMERTYPE+
“‘,PROVINCE=’”+PROVINCE+”‘,CITY=’”+CITY+”‘,TEL=’”+TEL+”‘ where CUSTOMER_ID=’”+CUSTOMER_ID+”‘ and CUSTOMER_NAME=’”+CUSTOMER_NAME+”‘”;
System.out.println(“sq2:”+sql2);
stmt.executeUpdate(sql2);
conn.commit();
}
} catch (SQLException e) {
e.printStackTrace();
}finally{
if(rs!=null)
rs.close();
if(stmt!=null)
stmt.close();
if(conn!=null)
conn.close();
}
}
public void afterSave() throws Exception {
super.afterSave();
}
}
/**
* 去掉List中重复数据类
*/
class NotRepeatedList<E> extends ArrayList<E> {
private static final long serialVersionUID = 1269085290242775328L;
public NotRepeatedList() {
super();
}
public NotRepeatedList(Collection<? extends E> c) {
for (E e : c) {
add(e);
}
}
public NotRepeatedList(int initialCapacity) {
super(initialCapacity);
}
public boolean add(E o) {
if (!contains(o)) {
return super.add(o);
}
return false;
};
public void add(int index, E element) {
if (!contains(element)) {
super.add(index, element);
}
};
}
发布报表的jsp
<%@ page language=“java” contentType=“text/html; charset=GBK”
pageEncoding=“GBK”%>
<%@ taglib uri=“/WEB-INF/runqianReport4.tld” prefix=“report”%>
<html>
<head>
<title>customInput</title>
</head>
<body>
<div align=“center”>
<report:html name=“report1″
reportFileName=“custom.raq”
generateParamForm=“no”
inputListener=“runqian.CustomInputListener” />
</div>
</body>
</html>