web工程配置struts2只要3步
1、添加架包
struts2-core-2.0.6.jar、xwork-2.0.1.jar、commons-logging-1.1.jar、freemarker-2.3.8.jar、ognl-2.6.11.jar、（ojdbc-1.4.jar）oracle驱动包
2、在src目录下新建struts2配置文件struts.xml
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"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
< struts >
< package name = "user" extends = "struts-default" >
< action name = "user_*" class = "com.hyw.action.UserAction" method = "{1}" >
< result name = "list" >/user_list.jsp < result name = "edit" >/user_edit.jsp < result name = "show" >/user_show.jsp |
3、配置web.xml文件
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< filter >
< filter-name >struts2 < filter-mapping >
< filter-name >struts2 < url-pattern >/* |
到这里struts2就已经和web工程集成了。
例：做一个对用户表的增删改查操作。
1、首先创建表和序列
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create sequence seq_userId start with 1; //创建序列 从1开始递增
create table t_user(
id number(10) not null ,
name nvarchar2(50) not null ,
pwd nvarchar2(50) not null ,
sex number(1),
age number(10)
)
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2、创建JDBC连接数据库类JDBCManager.java
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package com.hyw.util;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class JDBCManager {
public final static String DRIVER = "oracle.jdbc.OracleDriver" ;
public final static String URL = "jdbc:oracle:thin:@localhost:1521:huangyuewang" ;
public final static String USERNAME = "hyw" ;
public final static String PWD = "hyw" ;
public static Connection getConnection(){
Connection con = null ;
try {
Class.forName(DRIVER);
con = DriverManager.getConnection(URL, USERNAME, PWD);
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
return con;
}
public static void closeAll(Connection conn,PreparedStatement ps,ResultSet rs){
try {
if ( null != conn)
conn.close();
if ( null != ps)
ps.close();
if ( null != rs)
rs.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
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3、编写User.java实体类
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package com.hyw.entity;
public class User {
private Integer id;
private String name;
private String pwd;
private Integer sex;
private Integer age;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this .id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this .name = name;
}
public String getPwd() {
return pwd;
}
public void setPwd(String pwd) {
this .pwd = pwd;
}
public Integer getSex() {
return sex;
}
public void setSex(Integer sex) {
this .sex = sex;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this .age = age;
}
}
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4、编写数据访问层UserDaoImp.java类
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package com.hyw.dao.imp;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.List;
import com.hyw.dao.UserDao;
import com.hyw.entity.User;
import com.hyw.util.JDBCManager;
public class UserDaoImp implements UserDao {
private Connection conn = null ;
private PreparedStatement ps = null ;
private ResultSet rs = null ;
public void saveUser(User user){
conn = JDBCManager.getConnection();
String sql = "insert into t_user(id,name,pwd,sex,age) values(?,?,?,?,?)" ;
try {
int id = 0 ;
String sql2 = "select seq_userId.nextval from dual" ;
ps = conn.prepareStatement(sql2);
rs = ps.executeQuery();
while (rs.next()){
id = rs.getInt( 1 );
}
ps = conn.prepareStatement(sql);
ps.setInt( 1 , id);
ps.setString( 2 , user.getName());
ps.setString( 3 , user.getPwd());
ps.setInt( 4 , user.getSex());
ps.setInt( 5 , user.getAge());
ps.executeUpdate();
} catch (Exception e) {
e.printStackTrace();
} finally {
JDBCManager.closeAll(conn, ps, rs);
}
}
/**
* 修改用户
*/
public void updateUser(User user){
conn = JDBCManager.getConnection();
String sql = "update t_user set name=?,pwd=?,sex=?,age=? where id=?" ;
try {
ps = conn.prepareStatement(sql);
ps.setString( 1 , user.getName());
ps.setString( 2 , user.getPwd());
ps.setInt( 3 , user.getSex());
ps.setInt( 4 , user.getAge());
ps.setInt( 5 , user.getId());
ps.executeUpdate();
} catch (Exception e) {
e.printStackTrace();
} finally {
JDBCManager.closeAll(conn, ps, rs);
}
}
/**
* 删除用户
*/
public void removeUser(String ids){
if ( null != ids && ids.length() > 0 ){
conn = JDBCManager.getConnection();
String sql = "delete from t_user where id in (" +ids+ ")" ;
try {
ps = conn.prepareStatement(sql);
ps.executeUpdate();
} catch (Exception e) {
e.printStackTrace();
} finally {
JDBCManager.closeAll(conn, ps, rs);
}
}
}
/**
* 查询所有的用户记录
*/
public List
List new ArrayList
conn = JDBCManager.getConnection();
String sql = "select * from t_user" ;
try {
ps = conn.prepareStatement(sql);
rs = ps.executeQuery();
while (rs.next()){
User user = new User();
user.setId(rs.getInt( "id" ));
user.setAge(rs.getInt( "age" ));
user.setName(rs.getString( "name" ));
user.setPwd(rs.getString( "pwd" ));
user.setSex(rs.getInt( "sex" ));
list.add(user);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
JDBCManager.closeAll(conn, ps, rs);
}
return list;
}
/**
* 查询所有的用户记录
*/
public List
List new ArrayList
conn = JDBCManager.getConnection();
StringBuilder sql = new StringBuilder( "select * from t_user where 1=1 " );
if ( null != user1){
if ( null != user1.getName() && ! "" .equals(user1.getName()))
sql.append( "and name like '%" +user1.getName()+ "%' " );
}
try {
ps = conn.prepareStatement(sql.toString());
rs = ps.executeQuery();
while (rs.next()){
User user = new User();
user.setId(rs.getInt( "id" ));
user.setAge(rs.getInt( "age" ));
user.setName(rs.getString( "name" ));
user.setPwd(rs.getString( "pwd" ));
user.setSex(rs.getInt( "sex" ));
list.add(user);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
JDBCManager.closeAll(conn, ps, rs);
}
return list;
}
/**
* 查询一条记录
*/
public User findUser(Integer id){
User user = null ;
conn = JDBCManager.getConnection();
String sql = "select * from t_user where id=?" ;
try {
ps = conn.prepareStatement(sql);
ps.setInt( 1 , id);
rs = ps.executeQuery();
while (rs.next()){
user = new User();
user.setAge(rs.getInt( "age" ));
user.setId(rs.getInt( "id" ));
user.setName(rs.getString( "name" ));
user.setPwd(rs.getString( "pwd" ));
user.setSex(rs.getInt( "sex" ));
}
} catch (Exception e) {
e.printStackTrace();
} finally {
JDBCManager.closeAll(conn, ps, rs);
}
return user;
}
}
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5、将该类提取接口UserDao.java
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package com.hyw.dao;
import java.util.List;
import com.hyw.entity.User;
public interface UserDao {
public void saveUser(User user);
public void updateUser(User user);
public void removeUser(String ids);
public List
public List
public User findUser(Integer id);
}
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6、书写业务层UserServiceImp.java
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package com.hyw.service.imp;
import java.util.List;
import com.hyw.dao.UserDao;
import com.hyw.dao.imp.UserDaoImp;
import com.hyw.entity.User;
import com.hyw.service.UserService;
public class UserSeviceImp implements UserService {
private UserDao userDao = new UserDaoImp();
public void saveUser(User user){
userDao.saveUser(user);
}
/**
* 修改用户
*/
public void updateUser(User user){
userDao.updateUser(user);
}
/**
* 删除用户
*/
public void removeUser(String ids){
userDao.removeUser(ids);
}
/**
* 查询所有的用户记录
*/
public List
return userDao.findUsers();
}
public List
return userDao.findUsers(user);
}
/**
* 查询一条记录
*/
public User findUser(Integer id){
return userDao.findUser(id);
}
}
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7、将该业务类提取接口UserService.java
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package com.hyw.service;
import java.util.List;
import com.hyw.entity.User;
public interface UserService {
public void saveUser(User user);
public void updateUser(User user);
public void removeUser(String ids);
public List
public User findUser(Integer id);
public List
}
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8、编写控制器UserAction.java
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package com.hyw.action;
import java.util.List;
import com.hyw.entity.User;
import com.hyw.service.UserService;
import com.hyw.service.imp.UserSeviceImp;
import com.opensymphony.xwork2.ModelDriven;
public class UserAction implements ModelDriven{
private UserService userService = new UserSeviceImp();
private User user = new User();
private List //查询所有的用户信息
private String ids; //得到多个id用","隔开
private String userId; //得到一个id
private String msg; //jsp页面的提示消息
public String list(){
users = userService.findUsers();
return "list" ;
}
public String query(){
users = userService.findUsers(user);
return "list" ;
}
public String show(){
if ( null != userId && ! "" .equals(userId)){
user = userService.findUser( new Integer(userId));
}
return "show" ;
}
public String edit(){
if ( null != userId && ! "" .equals(userId)){
user = userService.findUser( new Integer(userId));
}
return "edit" ;
}
public String save(){
if ( null != user.getId()){
userService.updateUser(user);
setMsg( "修改用户成功！" );
} else {
userService.saveUser(user);
setMsg( "新增用户成功！" );
}
return list();
}
public String remove(){
userService.removeUser(ids);
setMsg( "删除用户成功！" );
return list();
}
public Object getModel() {
return user;
}
public User getUser() {
return user;
}
public void setUser(User user) {
this .user = user;
}
public List
return users;
}
public void setUsers(List
this .users = users;
}
public String getIds() {
return ids;
}
public void setIds(String ids) {
this .ids = ids;
}
public String getMsg() {
return msg;
}
public void setMsg(String msg) {
this .msg = msg;
}
public String getUserId() {
return userId;
}
public void setUserId(String userId) {
this .userId = userId;
}
}
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9、方法已处理完毕，现在开始视图层操作，修改index.jsp页面
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<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
< html >
< body >
< p >
< button onclick = "window.navigate('user_list.action');" > 用户列表 |
10、列表展示页面user_list.jsp
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<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="s" uri="/struts-tags" %>
< html >
< body onload = "if('${msg }') alert('${msg }'); " >
< form action = "user_query.action" method = "post" >
< table cellpadding = "0" cellspacing = "0" border = "1" width = "80%" >
< tbody >
< tr >
< td >用户名： < td >< input type = "text" name = "name" value = "${user.name}" /> < td >< input type = "submit" value = "查 询" /> < td >< input type = "button" value = "取 消" onclick = "window.navigate('user_list.action');" /> < p >
< button onclick = "window.navigate('user_edit.action');" >增 加 < button onclick = "window.navigate('user_edit.action?userId='+document.getElementById('ids').value);" >修 改 < button onclick = "document.getElementById('myform').submit();" >删 除 < form action = "user_remove.action" method = "post" id = "myform" >
< table cellpadding = "0" cellspacing = "0" border = "1" width = "80%" >
< thead >
< tr >
< td >操作 < td >用户名 < td >性别 < td >年龄 < tbody >
< s:iterator value = "users" >
< tr >
< td >< input type = "checkbox" name = "ids" id = "ids" value = "${id}" /> < td >< a href = "user_show.action?userId=${id}" >${name} < td >${sex eq 1?'男':'女'} < td >${age }
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11、单击“新增”按钮，新增user_edit.jsp页面
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<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="s" uri="/struts-tags" %>
< html >
< body >
< form action = "user_save.action" namespace = "user" method = "post" >
< s:hidden name = "user.id" />
< table cellpadding = "0" cellspacing = "0" border = "1" width = "80%" >
< tbody >
< tr >
< td >用户名 : < td >< input name = "user.name" value = "${user.name eq null?'':user.name }" > < td >年龄 < td >< input name = "user.age" value = "${user.age eq null?'':user.age }" /> < tr >
< td >密码 : < td >< input type = "password" name = "user.pwd" value = "${user.pwd eq null?'':user.pwd }" /> < td >性别 < td >< input type = "radio" name = "user.sex" value = "1" ${user.sex eq 1 or user.sex eq null?'checked':'' }/> 男< input type = "radio" name = "user.sex" value = "0" ${user.sex eq 0?'checked':'' }/> 女 < tr >
< td colspan = "4" align = "center" >
< input type = "submit" value = "保 存" />
< input type = "button" value = "返 回" onclick = "window.navigate('user_list.action');" />
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12、新增查看页面user_show.jsp
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<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
< html >
< body >
< table cellpadding = "0" cellspacing = "0" border = "1" width = "80%" >
< tbody >
< tr >
< td align = "right" >用户名 : < td >${user.name eq null?'':user.name } < td align = "right" >年龄: < td >${user.age eq null?'':user.age } < tr >
< td align = "right" >密码 : < td >${user.pwd eq null?'':user.pwd } < td align = "right" >性别: < td >${user.sex eq 1 or user.sex eq null?'男':'女' } < tr >
< td colspan = "4" align = "center" >
< input type = "button" value = "返 回" onclick = "window.navigate('user_list.action');" />
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到目前为止，对该用户的增删改查操作都已经处理完毕。