</field-validator>
<field-validator type="int">
<param name="min">1</param>
<param name="max">150</param>
<message>age should be between ${min} and ${max}</message>
</field-validator>
</field>
</validators>
-->
<validators>
<field name="user">
<field-validator type="visitor">
<param name="context">user</param>
<param name="appendPrefix">true</param>
<message>user's </message>
</field-validator>
</field>
</validators>
第二種校驗vistor
在上面文件只顯示申明
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE validators PUBLIC "-//OpenSymphony Group//XWork Validator 1.0.2//EN" "http://www.opensymphony.com/xwork/xwork-validator-1.0.2.dtd">
<validators>
<field name="user">//指定校驗模型類被使用的屬性
<field-validator type="visitor">//校驗類型
<param name="context">user</param>//指定具體校驗文件驗證user屬性
<param name="appendPrefix">true</param>//指定前綴 ：user‘s
<message>user's </message>//每一條信息都以他開頭
</field-validator>
</field>
</validators>
在校驗文件寫法：在user類下建立驗證校驗文件User-user-validation.xml類名，context和標準名來命名<param name="context">user</
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE validators PUBLIC "-//OpenSymphony Group//XWork Validator 1.0.2//EN" "http://www.opensymphony.com/xwork/xwork-validator-1.0.2.dtd">
<validators>
<field name="firstname">
<field-validator type="requiredstring">
<message>required first name</message>
</field-validator>
</field>
<field name="lastname">
<field-validator type="requiredstring">
<message>required last name</message>
</field-validator>
</field>
<field name="age">
<field-validator type="required">
<message>required age</message>
</field-validator>
<field-validator type="int">
<param name="min">1</param>
<param name="max">150</param>
<message>age should be between ${min} and ${max}</message>
</field-validator>
</field>
</validators>
注意驗證struts2是單例，多次點擊驗證就出問題：多次重複的錯誤信息
簡單測試：
在action下驗證
@SuppressWarnings("unchecked")
public void validate()
{
Map map = this.getFieldErrors();
Set set = map.keySet();
for (Iterator iter = set.iterator(); iter.hasNext();)
{
System.out.println(map.get(iter.next()));
}
}
}
測試出是單例：
解決辦法：全部用scope="prototype">
<bean id="saveUserAction" class="com.test.action.user.SaveUserAction" scope="prototype">
<property name="service" ref="userService"></property>
</bean>
刪除實現：
刪除action
package com.test.action.user;
import com.opensymphony.xwork2.ActionSupport;
import com.test.bean.User;
import com.test.service.UserService;
public class RemoveUserAction extends ActionSupport
{
private User user;
private UserService service;
public User getUser()
{
return user;
}
public void setUser(User user)
{
this.user = user;
}
public UserService getService()
{
return service;
}
public void setService(UserService service)
{
this.service = service;
}
@Override
public String execute() throws Exception
{
this.service.delete(user);
return SUCCESS;
}
}
配置struts.xml等不寫：
更新的編寫spring標準連接池的配置：
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> // destroy-method="close"表示用完之後自動關閉或釋放
<property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
<property name="url" value="jdbc:mysql://localhost:3306/mytest"></property>
<property name="username" value="root"></property>
<property name="password" value="root"></property>
<property name="maxActive" value="100"></property>
<property name="maxIdle" value="30"></property>
<property name="maxWait" value="500"></property>
<property name="defaultAutoCommit" value="true"></property>
</bean>
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource"></property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.show_sql">true</prop>
</props>
</property>
<property name="mappingResources">
<list>
<value>com/test/bean/User.hbm.xml</value>
</list>
</property>
</bean>
Spring中poi-2.5.1.jar對office的表格支持
第一步生成excel文件
第二步在瀏覽器瀏覽信息
在service服務方法中：
package com.test.service;
public interface UserService
{
public InputStream getInputStream();//返回輸入流
}
服務類的實現
package com.test.service.impl;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.List;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import com.test.bean.User;
import com.test.dao.UserDAO;
import com.test.service.UserService;
public class UserServiceImpl implements UserService
{
private UserDAO userDao;
public UserDAO getUserDao()
{
return userDao;
}
public void setUserDao(UserDAO userDao)
{
this.userDao = userDao;
}
public List<User> findAll()
{
return this.userDao.findAllUsers();
}
public InputStream getInputStream()
{
HSSFWorkbook wb = new HSSFWorkbook();//創建對象
HSSFSheet sheet = wb.createSheet("sheet1");//創建sheet
HSSFRow row = sheet.createRow(0);//創建行
HSSFCell cell = row.createCell((short) 0);//創建單元格
cell.setEncoding(HSSFCell.ENCODING_UTF_16);//設置字符編碼
cell.setCellValue("序號");
cell = row.createCell((short) 1);
cell.setEncoding(HSSFCell.ENCODING_UTF_16);
cell.setCellValue("姓");
cell = row.createCell((short) 2);
cell.setEncoding(HSSFCell.ENCODING_UTF_16);
cell.setCellValue("名");
cell = row.createCell((short) 3);
cell.setEncoding(HSSFCell.ENCODING_UTF_16);
cell.setCellValue("年齡");
List<User> list = this.findAll();//得到說有用戶信息
//把數值放到表格裏面
for (int i = 0; i < list.size(); ++i)
{
User user = list.get(i);
row = sheet.createRow(i + 1);//創建行
cell = row.createCell((short) 0);
cell.setEncoding(HSSFCell.ENCODING_UTF_16);
cell.setCellValue(i + 1);
cell = row.createCell((short) 1);
cell.setEncoding(HSSFCell.ENCODING_UTF_16);
cell.setCellValue(user.getFirstname());
cell = row.createCell((short) 2);
cell.setEncoding(HSSFCell.ENCODING_UTF_16);
cell.setCellValue(user.getLastname());
cell = row.createCell((short) 3);
cell.setEncoding(HSSFCell.ENCODING_UTF_16);
cell.setCellValue(user.getAge());
}
//設置導出文件
File file = new File("test.xls");
try
{
OutputStream os = new FileOutputStream(file);//創建輸出流
wb.write(os);//輸出到文件
os.close();
}
catch (Exception e)
{
e.printStackTrace();
}
InputStream is = null;
try
{
is = new FileInputStream(file);//建立輸入流
}
catch (FileNotFoundException e)
{
e.printStackTrace();
}
return is;
}
}
Action 的編寫：
package com.test.action.user;
import java.io.InputStream;
import com.opensymphony.xwork2.ActionSupport;
import com.test.service.UserService;
public class GenerateExcelAction extends ActionSupport
{
private UserService service;
public UserService getService()
{
return service;
}
public void setService(UserService service)
{
this.service = service;
}
public InputStream getDownloadFile()//文件下載改方法不能改變和struts配置一樣
{
return this.service.getInputStream();
}
@Override
public String execute() throws Exception
{
return SUCCESS;
}
}
Struts.xml的配置：
<action name="generateExcel" class="generateExcelAction">
<result name="success" type="stream">// stream表示要以二進制形式下載
<param name="contentType">application/vnd.ms-excel</param>//文件類型
<param name="contentDisposition">filename="AllUsers.xls"</param>//指定文件名及呈現信息
<param name="inputName">downloadFile</param>//指定文件下載名稱
</result>
</action>
配置spring
<bean id="generateExcelAction" class="com.test.action.user.GenerateExcelAction" scope="singleton"> singleton//表明是無狀態的
<property name="service" ref="userService"></property>
</bean>
頁面顯示：
<s:a href="generateExcel.action">生成excel</s:a>
在tomcat的bin下會有文件：test.xls
這樣產生的線程安全問題：
要用產生的輸出流轉化成輸入流，不用設置臨時文件
第一種解決辦法，生成隨機文件，並刪除
建立字符生成幫助類
package com.test.util;
import java.util.Random;
public class CharacterUtils
{
public static String getRandomString(int length)//第一種方法傳入長度
{
String str = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
Random random = new Random();//生成隨機數
StringBuffer sb = new StringBuffer();
for (int i = 0; i < length; ++i)
{
int number = random.nextInt(62);//生成0到61
sb.append(str.charAt(number));//生成字符
}
return sb.toString();
}
public static String getRandomString2(int length)//第二種方法傳入長度
{
Random random = new Random();
StringBuffer sb = new StringBuffer();
for (int i = 0; i < length; ++i)
{
int number = random.nextInt(3);
long result = 0;
switch (number)
{
case 0:
result = Math.round(Math.random() * 25 + 65);//生成0到25的douber類型取四捨五入整
sb.append(String.valueOf((char)result));
break;
case 1:
result = Math.round(Math.random() * 25 + 97);
sb.append(String.valueOf((char)result));
break;
case 2:
sb.append(String.valueOf(new Random().nextInt(10)));
break;
}
}
return sb.toString();
}
public static void main(String[] args)
{
System.out.println(getRandomString2(10));
}
}
調用類：
//String fileName = CharacterUtils.getRandomString(10);//調用自己的方法
String fileName = RandomStringUtils.randomAlphanumeric(10);//調用Apache的方法
fileName = new StringBuffer(fileName).append(".xls").toString();
File file = new File(fileName);
問題是在調用和打開文件的時候，查詢語句被調用了兩次
得修改struts.xml文件，同時關閉迅雷，要不又打開兩次了
<action name="generateExcel" class="generateExcelAction">
<result name="success" type="stream">
<param name="contentType">application/vnd.ms-excel</param>
<param name="contentDisposition">attachment;filename="AllUsers.xls"</param>/
