Code of student information management system based on java+jsp

Development language and technology: java, JSP, BootStrap, MySQL, jdbcTemplate technology, and druid.proteries configuration database connection pool.

Development tools: Eclipse/IDEA/MyEclipse/, JDK1.8, windows7 or above

Main functions: Based on the JSP+Servlet student information management system, it has the functions of registration, login, adding, deleting, modifying and checking student information, monitoring the number of online users, and free login for 3 days. Using listener and cookie technology, etc., there are verification codes using listener and cookie technology, etc., there are verification codes.

Click to view the way to get the source code

project skeleton

register

Log in

add students

revise students

Student Information List

package cn.itcast.dao.impl;

import cn.itcast.dao.StudentDao;
import cn.itcast.domain.Student;
import cn.itcast.util.JDBCUtils;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Set;

public class StudentDaoImpl implements StudentDao {

    private JdbcTemplate template = new JdbcTemplate(JDBCUtils.getDataSource());

    @Override
    public List<Student> findAll() {
        //使用JDBC操作数据库...
        //1.定义sql
        String sql = "select * from student";
        List<Student> students = template.query(sql, new BeanPropertyRowMapper<Student>(Student.class));

        return students;
    }



    @Override
    public void add(Student student) {
        //1.定义sql
        String sql = "insert into student values(null,?,?,?,?,?,?)";
        //2.执行sql
        template.update(sql, student.getName(), student.getGender(), student.getAge(), student.getAddress(), student.getQq(), student.getEmail());
    }

    @Override
    public void delete(int id) {
        //1.定义sql
        String sql = "delete from student where id = ?";
        //2.执行sql
        template.update(sql, id);
    }

    @Override
    public Student findById(int id) {
        String sql = "select * from student where id = ?";
        return template.queryForObject(sql, new BeanPropertyRowMapper<Student>(Student.class), id);
    }

    @Override
    public void update(Student student) {
        String sql = "update student set name = ?,gender = ? ,age = ? , address = ? , qq = ?, email = ? where id = ?";
        template.update(sql, student.getName(), student.getGender(), student.getAge(), student.getAddress(), student.getQq(), student.getEmail(), student.getId());
    }

    @Override
    public int findTotalCount(Map<String, String[]> condition) {
        //1.定义模板初始化sql
        String sql = "select count(*) from student where 1 = 1 ";
        StringBuilder sb = new StringBuilder(sql);
        //2.遍历map
        Set<String> keySet = condition.keySet();
        //定义参数的集合
        List<Object> params = new ArrayList<Object>();
        for (String key : keySet) {

            //排除分页条件参数
            if("currentPage".equals(key) || "rows".equals(key)){
                continue;
            }

            //获取value
            String value = condition.get(key)[0];
            //判断value是否有值
            if(value != null && !"".equals(value)){
                //有值
                sb.append(" and "+key+" like ? ");
                params.add("%"+value+"%");//？条件的值
            }
        }
        System.out.println(sb.toString());
        System.out.println(params);

        return template.queryForObject(sb.toString(),Integer.class,params.toArray());
    }

    @Override
    public List<Student> findByPage(int start, int rows, Map<String, String[]> condition) {
        String sql = "select * from student  where 1 = 1 ";

        StringBuilder sb = new StringBuilder(sql);
        //2.遍历map
        Set<String> keySet = condition.keySet();
        //定义参数的集合
        List<Object> params = new ArrayList<Object>();
        for (String key : keySet) {

            //排除分页条件参数
            if("currentPage".equals(key) || "rows".equals(key)){
                continue;
            }

            //获取value
            String value = condition.get(key)[0];
            //判断value是否有值
            if(value != null && !"".equals(value)){
                //有值
                sb.append(" and "+key+" like ? ");
                params.add("%"+value+"%");//？条件的值
            }
        }

        //添加分页查询
        sb.append(" limit ?,? ");
        //添加分页查询参数值
        params.add(start);
        params.add(rows);
        sql = sb.toString();
        System.out.println(sql);
        System.out.println(params);

        return template.query(sql,new BeanPropertyRowMapper<Student>(Student.class),params.toArray());
    }
}

more code

package cn.itcast.web.servlet;

import cn.itcast.domain.Student;
import cn.itcast.service.StudentService;
import cn.itcast.service.impl.StudentServiceImpl;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebServlet("/findUserServlet")
public class FindUserServlet extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //1.获取id
        String id = request.getParameter("id");
        //2.调用Service查询
        StudentService service = new StudentServiceImpl();
        Student student = service.findUserById(id);

        //3.将user存入request
        request.setAttribute("student", student);
        //4.转发到update.jsp
        request.getRequestDispatcher("/update.jsp").forward(request,response);
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        this.doPost(request, response);
    }
}