Struts框架基础知识使用总结
本文章以一个简单的用户CRUD为例子,总结本人学习struts框架总结的一点小知识
一、struts配置文件
首先要把Struts必须的包加入到项目中的指定目录,如下图所示。
将这些必须的jar包复制到lib文件夹下之后,全选所有的jar包,右键--》build path --》add to build path。将文件加入到路径中去。
二、建立java文件目录
java的文件目录如下图所示。分为四个包。action、bean、biz和dao
首先bean包中方的是该项目中需要用到的实体类,负责记录属性和get/set方法
在本项目中,我们只用到了一个User类下面给出User类的代码
package com.song.bean;
public class User {
private int id;
private String name;
private String sex;
private int age;
private String telephone;
private String email;
private String specialty;
private String school;
private String address;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getTelephone() {
return telephone;
}
public void setTelephone(String telephone) {
this.telephone = telephone;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getSpecialty() {
return specialty;
}
public void setSpecialty(String specialty) {
this.specialty = specialty;
}
public String getSchool() {
return school;
}
public void setSchool(String school) {
this.school = school;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
}
第二个是dao包,dao包中存放的是对数据库的操作部分
BaseDao负责数据库的连接和断开操作
package com.song.dao;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class BaseDao {
public Connection getConnection() {
try {
Class.forName("com.mysql.jdbc.Driver");
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
String url = "";
String db_username = "";
String db_password = "";
Connection conn = null;
try {
conn = DriverManager.getConnection(url, db_username, db_password);
} catch (SQLException e) {
e.printStackTrace();
}
return conn;
}
public void closeAll(Connection conn, PreparedStatement pstmt, ResultSet rs) {
if (rs != null) {
try {
rs.close();
} catch (Exception e) {
e.printStackTrace();
}
}
if (pstmt != null) {
try {
pstmt.close();
} catch (Exception e) {
e.printStackTrace();
}
}
if (conn != null) {
try {
conn.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
}