ssm框架整合入门系列——新增-员工的添加

新增-员工的添加

新增-逻辑

1. 在index.jsp页面点击“新增”
2. 弹出新增对话框
3. 去数据库查询部门列表，显示在对话框中
4. 用户输入数据，并进行校验
   jquery前端校验，ajax用户名重复校验，重要数据（后端校验(JSR303)，唯一约束）
5. 完成保存

URI:

• /emp/{id} GET 查询员工
• /emp POST 保存员工
• /emp/{id} PUT 修改员工
• /emp/{id} DELETE 删除员工

在controller新增DepartmentController.java

package com.liantao.crud.controller;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import com.liantao.crud.bean.Department;
import com.liantao.crud.bean.Msg;
import com.liantao.crud.service.DepartmentService;

/**
 * 处理和部门有关的请求
 * @author liantao.me
 *
 */
@Controller
public class DepartmentController {

    @Autowired
    private DepartmentService departmentService;

    /**
     * 返回所有的部门信息
     */
    @RequestMapping("/depts")
    @ResponseBody
    public Msg getDepts(){
        //查出的所有部门信息
        List<Department> list = departmentService.getDepts();
        return Msg.success().add("depts", list);
    }

}

在service 新增DepartmentService.java

package com.liantao.crud.service;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.liantao.crud.bean.Department;
import com.liantao.crud.dao.DepartmentMapper;

@Service
public class DepartmentService {

    @Autowired
    private DepartmentMapper departmentMapper;

    public List<Department> getDepts() {
        // TODO Auto-generated method stub
        List<Department> list = departmentMapper.selectByExample(null);
        return list;
    }

}

修改EmployeeController.java，（添加JSR303校验，添加判断新增的用户名是否可用的方法）

1. pom.xml添加：

    <!-- JSR303数据校验支持 -->
    <!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-validator -->
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-validator</artifactId>
        <version>5.4.1.Final</version>
    </dependency>

1. EmployeeController.java 修改

package com.liantao.crud.controller;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.validation.Valid;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;

import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.liantao.crud.bean.Employee;
import com.liantao.crud.bean.Msg;
import com.liantao.crud.service.EmployeeService;

/**
 * 处理员工的crud请求
 * @author liantao.me
 *
 */
@Controller
public class EmployeeController {

    @Autowired
    EmployeeService employeeService;

    /**
     * 检查用户名是否可用
     * @param empName
     * @return
     */
    @ResponseBody
    @RequestMapping("/checkuser")
    public Msg checkuser(@RequestParam("empName")String empName){

        //先判断用户名是否是合法的表达式
        String regx = "(^[a-zA-Z0-9_-]{6,16}$)|(^[\u2E80-\u9FFF]{2,5})";
        if(!empName.matches(regx)){
            return Msg.fail().add("va_msg", "java:用户名为2-5位中文或者6-16位英文和数字的组合");
        }

        //数据库用户名重复校验
        boolean b = employeeService.checkUser(empName);
        if(b){
            return Msg.success();   //code 100
        }else
        {
            return Msg.fail().add("va_msg", "用户名不可用");      //code 200
        }
    }

    /**
     * 员工保存
     * 1.支持JSR303校验
     * 2.导入Hibernate-Validator
     *
     *
     * @return
     */
    @RequestMapping(value="/emp",method=RequestMethod.POST)
    @ResponseBody
    public Msg saveEmp(@Valid Employee employee, BindingResult result){
        if(result.hasErrors()){
            //校验失败，应该返回失败,在模态框中显示校验失败的信息
            Map<String, Object> map = new HashMap<>();
            List<FieldError> errors = result.getFieldErrors();
            for (FieldError fieldError : errors) {
                System.out.println("错误的字段名:"+fieldError.getField());
                System.out.println("错误信息："+fieldError.getDefaultMessage());
                map.put(fieldError.getField(), fieldError.getDefaultMessage());
            }
            return Msg.fail().add("errFields", map);

        }else{
            employeeService.saveEmp(employee);
            return Msg.success();
        }

    }

    /**
     * 需导入jackson包
     * @param pn
     * @return
     */
    @RequestMapping("/emps")
    @ResponseBody
    public Msg getEmpsWithJson(@RequestParam(value="pn",defaultValue="1")Integer pn){
        //引入PageHelper分页插件
        //查询之前需要调用,,传入页码，以及每页的大小
        PageHelper.startPage(pn,5);
        //startPage后面紧跟的是这个查询就是一个分页查询
        List<Employee> emps = employeeService.getAll();
        //使用pageInfo包装查询后的结果，只需要将Pageinfo交给页面就行了
        //封装了详细的分页信息，包括我们查出来的数据,传入连续显示的数据
        PageInfo page = new PageInfo(emps,5);

        return Msg.success().add("pageInfo",page);

    }

    /*
     * 查询员工数据（分页查询）
     * @return
     */
    //@RequestMapping("/emps")
    public String getEmps(@RequestParam(value="pn",defaultValue="1")Integer pn,Model model){

        //引入PageHelper分页插件
        //查询之前需要调用,,传入页码，以及每页的大小
        PageHelper.startPage(pn,5);
        //startPage后面紧跟的是这个查询就是一个分页查询
        List<Employee> emps = employeeService.getAll();
        //使用pageInfo包装查询后的结果，只需要将Pageinfo交给页面就行了
        //封装了详细的分页信息，包括我们查出来的数据,传入连续显示的数据
        PageInfo page = new PageInfo(emps,5);
        model.addAttribute("pageInfo",page);
        return "list";
    }

}

EmployeeService的修改（添加了员工保存，和用户名检测的方法）：

package com.liantao.crud.service;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.RequestParam;

import com.github.pagehelper.PageHelper;
import com.liantao.crud.bean.Employee;
import com.liantao.crud.bean.EmployeeExample;
import com.liantao.crud.bean.EmployeeExample.Criteria;
import com.liantao.crud.dao.EmployeeMapper;

@Service
public class EmployeeService {

    @Autowired
    EmployeeMapper employeeMapper;

    /**
     * 查询所有员工数据（分页查询）
     * @return
     */
    public List<Employee> getAll() {
        // TODO Auto-generated method stub

        return employeeMapper.selectByExampleWithDept(null);
    }

    /**
     * 员工保存
     * @param employee
     */
    public void saveEmp(Employee employee) {
        // TODO Auto-generated method stub
        employeeMapper.insertSelective(employee);
    }

    /**
     * 检验用户名是否可用
     * @param empName
     * @return true.代表当前姓名可用，否则false 不可用
     */
    public boolean checkUser(String empName) {
        // TODO Auto-generated method stub
        EmployeeExample example = new EmployeeExample();
        Criteria criteria = example.createCriteria();
        criteria.andEmpNameEqualTo(empName);
        long count = employeeMapper.countByExample(example);
        return count == 0;
    }

}

修改Employee.java (给相关字段加了注解)

package com.liantao.crud.bean;

import javax.validation.constraints.Pattern;

import org.hibernate.validator.constraints.Email;
import org.hibernate.validator.constraints.Length;

public class Employee {
    private Integer empId;

    @Pattern(regexp="(^[a-zA-Z0-9_-]{6,16}$)|(^[\u2E80-\u9FFF]{2,5})"
            ,message="用户名必须是2-5位中文或者6-16位英文和数字的组合")
    private String empName;

    private String gender;

    //@Email
    @Pattern(regexp="^([a-z0-9_\\.-]+)@([\\da-z\\.-]+)\\.([a-z\\.]{2,6})"
            ,message="邮箱格式不正确")
    private String email;

    private Integer dId;

  //希望查询员工的同时部门信息也是查询好的
    private Department department;

    public Employee() {
        super();
        // TODO Auto-generated constructor stub
    }

    public Employee(Integer empId, String empName, String gender, String email, Integer dId) {
        super();
        this.empId = empId;
        this.empName = empName;
        this.gender = gender;
        this.email = email;
        this.dId = dId;
    }

      public Department getDepartment() {
            return department;
        }

        public void setDepartment(Department department) {
            this.department = department;
        }

    public Integer getEmpId() {
        return empId;
    }

    public void setEmpId(Integer empId) {
        this.empId = empId;
    }

    public String getEmpName() {
        return empName;
    }

    public void setEmpName(String empName) {
        this.empName = empName == null ? null : empName.trim();
    }

    public String getGender() {
        return gender;
    }

    public void setGender(String gender) {
        this.gender = gender == null ? null : gender.trim();
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email == null ? null : email.trim();
    }

    public Integer getdId() {
        return dId;
    }

    public void setdId(Integer dId) {
        this.dId = dId;
    }
}

完成index.jsp的jsp修改 (主要是jq，ajax对表单数据显示、验证的逻辑处理）

<%@ page language="java" import="java.util.*" contentType="text/html; charset=utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    <title>员工列表</title>
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="This is my page">
    <!--
    <link rel="stylesheet" type="text/css" href="styles.css">
    -->
    <!-- 引入jquery -->
    <script type="text/javascript" src="${path}/ssm-crud/static/js/jquery-1.12.4.js"></script>
    <!-- 引入css、js -->
    <link href="${path}/ssm-crud/static/bootstrap-3.3.7-dist/css/bootstrap.min.css" rel="stylesheet">
    <script src="${path}/ssm-crud/static/bootstrap-3.3.7-dist/js/bootstrap.min.js"></script>
  </head>

  <body>

    <!-- 员工添加的模态框 -->
    <div class="modal fade" id="empAddModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
      <div class="modal-dialog" role="document">
        <div class="modal-content">
          <div class="modal-header">
            <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
            <h4 class="modal-title" id="myModalLabel">员工添加</h4>
          </div>
          <div class="modal-body">
            <form class="form-horizontal">
              <div class="form-group">
                <label class="col-sm-2 control-label">empName</label>
                <div class="col-sm-10">
                  <input type="text" name="empName" class="form-control" id="empName_add_input" placeholder="empName">
                  <span class="help-block"></span>
                </div>
              </div>
              <div class="form-group">
                <label class="col-sm-2 control-label">email</label>
                <div class="col-sm-10">
                  <input type="text" name="email" class="form-control" id="email_add_input" placeholder="[email protected]">
                    <span class="help-block"></span>
                </div>
              </div>
              <div class="form-group">
                <label class="col-sm-2 control-label">gender</label>
                <div class="col-sm-10">
                    <label class="radio-inline">
                        <input type="radio" name="gender" id="gender1_add_input" value="M" checked="true"> 男
                    </label>
                    <label class="radio-inline">
                        <input type="radio" name="gender" id="gender2_add_input" value="F"> 女
                    </label>
                </div>
              </div>
              <div class="form-group">
                <label class="col-sm-2 control-label">deptName</label>
                <div class="col-sm-4">
                    <!-- 提交部门id即可 -->
                    <select class="form-control" name="dId">
                    </select>
                </div>
              </div>

            </form>
          </div>
          <div class="modal-footer">
            <button type="button" class="btn btn-default" data-dismiss="modal">关闭</button>
            <button type="button" class="btn btn-primary" id="emp_save_btn">保存</button>
          </div>
        </div>
      </div>
    </div>

    <div class="container">
        <!-- 标题 -->
        <div class="row">
            <div class="col-md-12">
                <h1>SSM-CRUD</h1>
            </div>
        </div>
        <!-- 按钮 -->
        <div class="row">
            <div class="col-md-4 col-md-offset-8">
                <button class="btn btn-primary" id="emp_add_modal_btn">新增</button>
                <button class="btn btn-danger">删除</button>
            </div>
        </div>
        <!-- 显示表格数据 -->
        <div class="row">
            <div class="col-md-12">
                <table class="table table-hover" id="emps_table">
                    <thead>
                        <tr>
                            <th>#</th>
                            <th>empName</th>
                            <th>gender</th>
                            <th>email</th>
                            <th>deptName</th>
                            <th>操作</th>
                        </tr>
                    </thead>
                    <tbody>

                    </tbody>
                </table>
            </div>
        </div>
        <!-- 显示分页信息 -->
        <div class="row">
            <!-- 分页文字信息 -->
            <div class="col-md-6" id="page_info_area">

            </div>
            <!-- 分页条信息 -->
            <div class="col-md-6" id="page_nav_area">

            </div>

        </div>
    </div>
    <script type="text/javascript">

        //总记录数
        var totalRecord;
        //1.页面加载完成以后，直接去发送一个ajax请求，要到分页数据
        $(function(){
            //去首页
            to_page(1);
        });

        function to_page(pn){
            $.ajax({
                url:"${path}/ssm-crud/emps",
                data:"pn="+pn,
                type:"GET",
                success:function(result){
                    //console.log(result);
                    //1.解析并显示员工数据
                    build_emps_table(result);
                    //2.解析并显示分页信息
                    build_page_info(result);
                    //3.解析显示分页数据
                    build_page_nav(result);

                }

            });
        }

        function build_emps_table(result){
            //清空table表格
            $("#emps_table tbody").empty();

            var emps = result.extend.pageInfo.list;
            $.each(emps,function(index,item){
                //alert(item.empName);
                var emIdTd = $("<td></td>").append(item.empId);
                var empNameTd = $("<td></td>").append(item.empName);
                var genderTd = $("<td></td>").append(item.gender=='M'?'男':'女');
                var mailTd = $("<td></td>").append(item.email);
                var deptNameTd = $("<td></td>").append(item.department.deptName);
                /**
                <button class="btn btn-primary btn-sm">
                                    <span class="glyphicon glyphicon-pencil" aria-hidden="true"></span>
                                    编辑
                                </button>
                **/
                var editBtn = $("<button></button>").addClass("btn btn-primary btn-sm")
                                .append($("<span></span>").addClass("glyphicon glyphicon-pencil")).append("编辑");
                var delBtn = $("<button></button>").addClass("btn btn-danger btn-sm")
                                .append($("<span></span>").addClass("glyphicon glyphicon-trash")).append("删除");
                var btnTd = $("<td></td>").append(editBtn).append(" ").append(delBtn);
                //append方法执行完成以后还是返回原来的元素
                $("<tr></tr>").append(emIdTd)
                        .append(empNameTd)
                        .append(genderTd)
                        .append(mailTd)
                        .append(deptNameTd)
                        .append(btnTd)
                        .appendTo("#emps_table tbody");

            });
        }
        //解析显示分页信息
        function build_page_info(result){
        //清空table表格
            $("#page_info_area").empty();
            $("#page_info_area").append("当前"+result.extend.pageInfo.pageNum+"页,总"+
                                result.extend.pageInfo.pages+"页,总"+
                                result.extend.pageInfo.total+"条记录");
            totalRecord = result.extend.pageInfo.total;
        }

        //解析显示分页条,点击分页要能去下一页
        function build_page_nav(result){

            //清空#page_nav_area
            $("#page_nav_area").empty();

            var ul = $("<ul></ul>").addClass("pagination");

            //构建元素
            var firstPageLi = $("<li></li>").append($("<a></a>").append("首页").attr("href","#"));
            var prePageLi = $("<li></li>").append($("<a></a>").append("&laquo;"));
            if(result.extend.pageInfo.hasPreviousPage == false){
                firstPageLi.addClass("disabled");
                prePageLi.addClass("disabled");
            }else{
                //为元素添加点击翻页
                firstPageLi.click(function(){
                    to_page(1);
                })
                prePageLi.click(function(){
                    to_page(result.extend.pageInfo.pageNum-1);
                })
            }

            var nextPageLi = $("<li></li>").append($("<a></a>").append("&raquo;"));
            var laststPageLi = $("<li></li>").append($("<a></a>").append("末页").attr("href","#"));
            if(result.extend.pageInfo.hasNextPage == false){
                nextPageLi.addClass("disabled");
                laststPageLi.addClass("disabled");
            }else{
                //为元素添加点击翻页
                nextPageLi.click(function(){
                    to_page(result.extend.pageInfo.pageNum+1);
                })
                laststPageLi.click(function(){
                    to_page(result.extend.pageInfo.pages);
                })
            }

            //添加首页和前一页的显示
            ul.append(firstPageLi).append(prePageLi);

            //1,2,..5遍历给ul中添加页码提示
            $.each(result.extend.pageInfo.navigatepageNums,function(index,item){

                var numLi = $("<li></li>").append($("<a></a>").append(item));
                if(result.extend.pageInfo.pageNum == item){
                    numLi.addClass("active");
                }
                numLi.click(function(){
                    to_page(item);
                })

                ul.append(numLi);

            })
            //添加下一页和末页的提示
            ul.append(nextPageLi).append(laststPageLi);
            //把ul加入到nav
            var navEle = $("<nav></nav>").append(ul);
            navEle.appendTo("#page_nav_area");

        }

        //清空表单样式及内容
        function reset_form(ele){
            $(ele)[0].reset();
            //清空表单样式
            $(ele).find("*").removeClass("has-error has-success");
            $(ele).find(".help-block").text("");
        }

        //点击新增弹出模态框，
        $("#emp_add_modal_btn").click(function(){
            //清楚表单数据（表单重置）
            reset_form("#empAddModal form");
            //发送ajax请求，查出部门信息，显示在下拉列表中
            getDepts();

            //弹出模态框
            $("#empAddModal").modal({
                backdrop:"static"
            });
        });

        //查出所有的部门信息并显示在下拉列表中
        function getDepts(){
            $.ajax({
                url:"${path}/ssm-crud/depts",
                type:"GET",
                success:function(result){
                    //{"code":100,"msg":"处理成功",
                    //"extend":{"depts":[{"deptId":1,"deptName":"开发部"},{"deptId":2,"deptName":"测试部"}]}}
                    //console.log(result);

                    //显示部门信息在下拉列表中
                    //$("#empAddModal select").append("");
                    $.each(result.extend.depts,function(){
                        var optionEle = $("<option></option>").append(this.deptName).attr("value",this.deptId);
                        optionEle.appendTo("#empAddModal select");
                    });
                }
            });
        }

        //校验表单数据
        function validate_add_form(){
            //1.拿到要检验的数据，使用正则表达式
            var empName = $("#empName_add_input").val();
            var regName = /(^[a-zA-Z0-9_-]{6,16}$)|(^[\u2E80-\u9FFF]{2,5})/;  //用户名的校验，允许中文，规定区分大小写
            if(!regName.test(empName)){
                //alert("用户名为2-5位中文或者6-16位英文和数字的组合");

                show_validate_msg("#empName_add_input","error","用户名为2-5位中文或者6-16位英文和数字的组合");

                return false;
            }else{
                show_validate_msg("#empName_add_input","success","")
            }

            //2.校验邮箱
            var eamil = $("#email_add_input").val();
            var regEmail = /^([a-z0-9_\.-]+)@([\da-z\.-]+)\.([a-z\.]{2,6})$/;
            if(!regEmail.test(eamil)){
                //alert("邮箱格式不正确");
                //应该清空元素之前的样式
                show_validate_msg("#email_add_input","error","邮箱格式不正确");
                return false;
            }else{
                show_validate_msg("#email_add_input","success","");
            }
            return true;
        }

        //显示检验结果的提示信息
        function show_validate_msg(ele,status,msg){
            //清楚当前元素的校验状态
            $(ele).parent().removeClass("has-success has-error");
            $(ele).next("span").text("");
            if("success"==status){
                $(ele).parent().addClass("has-success");
                $(ele).next("span").text(msg);

            }else if("error" == status){
                $(ele).parent().addClass("has-error");
                $(ele).next("span").text(msg);

            }
        }

        //ajax校验用户名是否可用
        $("#empName_add_input").change(function(){
            //发送ajax请求校验用户名是否可用
            var empName = this.value;
            $.ajax({
                url:"${path}/ssm-crud/checkuser",
                data:"empName="+empName,
                type:"POST",
                success:function(result){
                    if(result.code=="100"){
                        show_validate_msg("#empName_add_input","success","用户名可用");
                        $("#emp_save_btn").attr("ajax-va","success");
                    }else{
                        show_validate_msg("#empName_add_input","error",result.extend.va_msg);
                        $("#emp_save_btn").attr("ajax-va","error");
                    }
                }
            });

        });

        //点击保存，保存员工
        $("#emp_save_btn").click(function(){
            //1.模态框中填写的表单数据提交给服务器进行保存
            //先对要提交给服务器的数据进行校验
            if(!validate_add_form()){
                return false;
            }

            //1.判断之前的ajax用户名是否成功,如果失败，阻止保存操作
            if($(this).attr("ajax-va")=="error"){
                return false;
            }
            //2.发送ajax请求保存员工
            $.ajax({
                url:"${path}/ssm-crud/emp",
                type:"POST",
                data:$("#empAddModal form").serialize(),
                success:function(result){
                    //alert(result.msg);    //弹出提示框

                    if(result.code == 100){
                        //员工保存成功，
                        //1.关闭模态框
                        $("#empAddModal").modal("hide")
                        //2.来到最后一页,显示刚才保存的数据
                        //发送ajax请求显示最后一页数据即可
                        to_page(totalRecord);
                    }else{
                        //显示失败信息
                        //console.log(result);
                        //有哪个字段的错误信息就显示哪个字段信息
                        if(undefined != result.extend.errorFields.email){
                            //显示邮箱错误信息系
                            show_validate_msg("#email_add_input","error",result.extend.errorFields.email);
                        }
                        if(undefined != result.extend.errorFields.empName){
                            //显示员工名字错误信息
                            show_validate_msg("#empName_add_input","error",result.extend.errorFields.empName);
                        }
                    }

                }
            }); 

        });

    </script>
  </body>
</html>

END

原文地址：https://www.cnblogs.com/famine/p/9931786.html