mybatis+servlet
作者：互联网
实现两个功能-增加信息、信息查询
结构目录
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.wxy</groupId>
<artifactId>annotation</artifactId>
<version>1.0-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.5</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.16</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.12</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.10</version>
</dependency>
<dependency>
<groupId>org.glassfish.web</groupId>
<artifactId>javax.servlet.jsp.jstl</artifactId>
<version>1.2.4</version>
</dependency>
<dependency>
<groupId>javax.servlet.jsp.jstl</groupId>
<artifactId>jstl-api</artifactId>
<version>1.2</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.2</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-api</artifactId>
<version>7.0</version>
</dependency>
<dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>1.1.2</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.1.41</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.5</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.5</version>
</dependency>
</dependencies>
</project>
userdao.java
package com.wxy.dao;
import com.wxy.domain.user;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Select;
import java.util.List;
public interface userdao {
//用户的持久层接口
@Insert("insert into emp(empid,first_name,salary) values(#{empid},#{first_name},#{salary})")
void saveuser(user u);
@Select("select * from emp where salary>500")
List<user> findall();
}
user.java
package com.wxy.domain;
import java.io.Serializable;
public class user implements Serializable {
private Integer empid;
private String first_name;
private Integer salary;
//public static List<user> a;
public void setEmpid(Integer empid) {
this.empid = empid;
}
public void setFirst_name(String first_name) {
this.first_name = first_name;
}
public void setSalary(Integer salary) {
this.salary = salary;
}
public Integer getEmpid() {
return empid;
}
public String getFirst_name() {
return first_name;
}
public Integer getSalary() {
return salary;
}
@Override
public String toString() {
return "user{" +
"empid=" + empid +
", first_name=" + first_name +
", salary=" + salary +
"}\n";
}
}
addservlet.java
package com.wxy.servlet;
import com.wxy.dao.userdao;
import com.wxy.domain.user;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.net.URL;
import java.util.List;
public class addservlet extends HttpServlet {
private static final long serialVersionUID=1L;
public void doGet(HttpServletRequest request,HttpServletResponse resp) throws FileNotFoundException {
String resource="./mybatis-config.xml";
URL o=Thread.currentThread().getContextClassLoader().getResource("");
String path=o.getPath().replace("classes","classes");
InputStream in;
in=new FileInputStream(new File(path+resource));
SqlSessionFactory sqlSessionFactory=new SqlSessionFactoryBuilder().build(in);
SqlSession session=sqlSessionFactory.openSession();
userdao userdao=(userdao)session.getMapper(userdao.class);
user a = new user();
a.setEmpid(Integer.parseInt(request.getParameter("empid")));
a.setFirst_name(request.getParameter("first_name"));
a.setSalary(Integer.parseInt(request.getParameter("salary")));
userdao.saveuser(a);
List<user> list=userdao.findall();
System.out.println(list.toString());
session.close();
}
}
mybatis-config.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mtbatis.org/dtd/mybatis-3-config.dtd">
<!-- mybatis的主配置文件 -->
<configuration>
<!-- 配置环境 -->
<environments default="mysql">
<!-- 配置MySQL的环境 -->
<environment id="mysql">
<transactionManager type="JDBC"></transactionManager>
<!-- 配置数据源（连接池 -->
<dataSource type="POOLED">
<!-- 配置联接数据库的四个基本信息 -->
<property name="driver" value="com.mysql.cj.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/mybatis?characterEncoding=utf8&useSSL=false"/>
<property name="username" value="root"/>
<property name="password" value="2999029aaa"/>
</dataSource>
</environment>
</environments>
<!-- 指定映射配置文件的位置，映射文件指的是每个dao独立时配置文件 -->
<mappers>
<mapper class="com.wxy.dao.userdao"/>
<!--
<mapper resource="usersMaooing.xml"/>
-->
</mappers>
</configuration>
add.xml
<%@ page contentType="text/html;charset=UTF-8" language="java"
import="com.wxy.domain.user" %>
<html>
<head>
<body>
<form action="addd" method="get">
empid:<input type="text" name="empid" value=""/><br/>
first_name:<input type="text" name="first_name" value=""><br/>
salary:<input type="text" name="salary"value=""><br/>
<input type="submit" value="增加"/>
</form>
</body>
</head>
</html>
测试结果：
标签：salary,empid,name,mybatis,import,servlet,public 来源： https://www.cnblogs.com/zuiaimiusi/p/11921572.html