兩天的Struts2課程實訓終於結束了，現在網上Struts2的資料還比較少，一些重要的用法還是Mark一下的好：

從資料庫批量取得資料，並在前臺頁面中用表格迴圈輸出顯示

1，一定要定義實體類 比如glyuan類和gylou類程式碼如下

 package com.entity;

 public class glyuan {

 private String account = null;
 private String name = null;
 private String gylou = null;
 private String descrip = null;
 
 public String getAccount() {
  return account;
 }
 public void setAccount(String account) {
  this.account = account;
 }
 public String getName() {
  return name;
 }
 public void setName(String name) {
  this.name = name;
 }
 public String getGylou() {
  return gylou;
 }
 public void setGylou(String gylou) {
  this.gylou = gylou;
 }
 public String getDescrip() {
  return descrip;
 }
 public void setDescrip(String descrip) {
  this.descrip = descrip;
 }
 
}

 package com.entity;

 public class gylou {

 private int num;
 private String name = null;
 private int loucengshu;
 private int fangjianshu;
 private int chuangweishu;
 private String descrip = null;
 
 public int getNum() {
  return num;
 }
 public void setNum(int num) {
  this.num = num;
 }
 public String getName() {
  return name;
 }
 public void setName(String name) {
  this.name = name;
 }
 public int getLoucengshu() {
  return loucengshu;
 }
 public void setLoucengshu(int loucengshu) {
  this.loucengshu = loucengshu;
 }
 public int getFangjianshu() {
  return fangjianshu;
 }
 public void setFangjianshu(int fangjianshu) {
  this.fangjianshu = fangjianshu;
 }
 public int getChuangweishu() {
  return chuangweishu;
 }
 public void setChuangweishu(int chuangweishu) {
  this.chuangweishu = chuangweishu;
 }
 public String getDescrip() {
  return descrip;
 }
 public void setDescrip(String descrip) {
  this.descrip = descrip;
 }
}

2，在Action中執行邏輯，從資料庫取出資料，並注入

package com.Action;

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;

import com.entity.*;

import com.opensymphony.xwork2.ActionSupport;

public class SelSuperAdminInfo extends ActionSupport {
 public List<glyuan> list;//管理員資訊表格list
 public List<gylou> list1;//公寓樓資訊表格list
 public List gyloulist;//新增公寓管理員時的授權公寓樓list
 public List<glyuan> Infolist = new ArrayList<glyuan>();
 public List<gylou> Infolist1 = new ArrayList<gylou>();
 public List gylouInfo = new ArrayList();//臨時的公寓樓名稱list 
 
 public List getGyloulist() {
  return gyloulist;
 }

 public void setGyloulist(List gyloulist) {
  this.gyloulist = gyloulist;
 }
 
 public List<gylou> getList1() {
  return list1;
 }

 public void setList1(List<gylou> list1) {
  this.list1 = list1;
 }
 
 public List<glyuan> getList() {
  return list;
 }

 public void setList(List<glyuan> list) {
  this.list = list;
 }
 
 @Override
 public String execute() throws Exception {
  // TODO Auto-generated method stub
  Connection con = DatabaseConnection.getConnection();
  //查詢管理員資訊
  String sql = "select * from glyuan_tb";
  Statement ps = con.createStatement();
  ResultSet rs = ps.executeQuery(sql);
  while (rs.next()) {
   glyuan man = new glyuan();
   man.setAccount(rs.getString("account"));
   man.setName(rs.getString("name"));
   man.setGylou(rs.getString("gylou"));
   man.setDescrip(rs.getString("descrip"));
   Infolist.add(man);
  }
  //注入
  this.setList(Infolist);
  //查詢公寓樓名稱資訊
  String sql1 = "select name from gylou_tb";
  ResultSet rs1 = ps.executeQuery(sql1);
  while (rs1.next()) {
   gylouInfo.add(rs1.getString("name"));
  }
  //注入
  this.setGyloulist(gylouInfo); 
  //查詢公寓樓資訊
  String sql2 = "select * from gylou_tb";
  ResultSet rs2= ps.executeQuery(sql2);
  while (rs2.next()) {
   gylou lou = new gylou();
   lou.setNum(rs2.getInt("num"));
   lou.setName(rs2.getString("name"));
   lou.setLoucengshu(rs2.getInt("loucengshu"));
   lou.setFangjianshu(rs2.getInt("fangjianshu"));
   lou.setChuangweishu(rs2.getInt("chuangweishu"));
   lou.setDescrip(rs2.getString("descrip"));
   Infolist1.add(lou);
  }
  //注入
  this.setList1(Infolist1);
  return SUCCESS;
 }
}

3，注入後即可在前臺頁面中使用，用迭代器迴圈輸出，程式碼如下：

<table width="650" height="296" border="1">
    <tr>
      <td colspan="4"><strong>公寓管理員資訊</strong></td>
    </tr>
    <tr>
      <td>賬號</td>
      <td>姓名</td>
      <td>所轄公寓樓</td>
      <td>描述</td>
    </tr>
    <s:iterator value="list" status="st">
    <tr>
      <td><s:property value="account"/></td>
      <td><s:property value="name"/></td>
      <td><s:property value="gylou"/></td>
      <td><s:property value="descrip"/></td>
    </tr>
    </s:iterator>
  </table>

-----------------------------------------------------------------------------------------------------------------

<table width="650" height="296" border="1">
    <tr>
      <td colspan="6"><strong>公寓樓資訊</strong></td>
    </tr>
    <tr>
      <td>樓號</td>
      <td>名稱</td>
      <td>樓層數</td>
      <td>房間總數</td>
      <td>床位總數</td>
      <td>描述</td>
    </tr>
    <s:iterator value="list1" status="st">
    <tr>
      <td><s:property value="num"/></td>
      <td><s:property value="name"/></td>
      <td><s:property value="loucengshu"/></td>
      <td><s:property value="fangjianshu"/></td>
      <td><s:property value="chuangweishu"/></td>
      <td><s:property value="descrip"/></td>
    </tr>
    </s:iterator>
  </table>

OK，功能已經實現了，程式碼也比較詳細，希望能對你有所幫助。