很多人都想要了解一下springmvc增删改查，下面的文章内容要给大家分享的是一个springmvc增删改查的实例，一起来了解一下吧。
MVC布局格式-1.MVC包的创建格式
2.创建实体类
package cn.ps.entity;
import org.hibernate.validator.constraints.NotBlank;
import javax.validation.constraints.DecimalMax;
import javax.validation.constraints.DecimalMin;
import javax.validation.constraints.Pattern;
import javax.validation.constraints.Size;
public class MySqlUser
{
private int id;
@NotBlank(message = "学生姓名不能为空")
private String name;
@DecimalMin(value = "1", message = "年龄不能小于1岁")
@DecimalMax(value = "130", message = "年龄最大为130岁")
private String age;
private String sex;
@Pattern(regexp = ".+@.+\\..+", message = "邮箱格式错误")
private String eamil;
@Size(max = 11, min = 11, message = "手机号码必须为11位数")
private String phone;
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 String getAge()
{
return age;
}
public void setAge(String age)
{
this.age = age;
}
public String getEamil()
{
return eamil;
}
public void setEamil(String eamil)
{
this.eamil = eamil;
}
public String getPhone()
{
return phone;
}
public void setPhone(String phone)
{
this.phone = phone;
}
}3.配置XML文件和资源文件
web.xml文件 <?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd" version="4.0"> <!--关联一个空的jsp--> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!-- 过滤springmvc的请求 将请求字符集修改为UTF-8--> <filter> <filter-name>fgf</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <init-param> <param-name>encoding</param-name> <param-value>UTF-8</param-value> </init-param> <!-- 设置请求头--> <init-param> <param-name>forceRequestEncoding</param-name> <param-value>true</param-value> </init-param> <!--设置请求体--> <init-param> <param-name>forceResponseEncoding</param-name> <param-value>true</param-value> </init-param> </filter> <filter-mapping> <filter-name>fgf</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- springmvc 支持 rest风格 --> <filter> <filter-name>httpFile</filter-name> <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class> </filter> <filter-mapping> <filter-name>httpFile</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- 中央处理器 --> <servlet> <servlet-name>DispatcherServlet</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>1</load-on-startup> <init-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/springweb.xml</param-value> </init-param> </servlet> <servlet-mapping> <servlet-name>DispatcherServlet</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> </web-app>
springweb.xml文件
<?xml version="1.0" encoding="UTF-8"?>
<beans
xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
">
<context:component-scan base-package="cn"></context:component-scan>
<context:property-placeholder location="classpath:/jdbc.properties"/>
<!--启用验证-->
<mvc:annotation-driven></mvc:annotation-driven>
<bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource">
<property name="driverClassName" value="${jdbcDriver}"></property>
<property name="url" value="${jdbcUrl}"></property>
<property name="username" value="${jdbcUsername}"></property>
<property name="password" value="${jdbcPassword}"></property>
</bean>
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="dataSource"></property>
</bean>
</beans>pom.xml文件 <?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>cn.ps</groupId> <artifactId>SpringMVCRest</artifactId> <version>1.0-SNAPSHOT</version> <packaging>war</packaging> <dependencies> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>4.3.20.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>4.3.19.RELEASE</version> </dependency> <dependency> <groupId>commons-lang</groupId> <artifactId>commons-lang</artifactId> <version>2.1</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.39</version> </dependency> <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-dbcp2 --> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-dbcp2</artifactId> <version>2.5.0</version> </dependency> <!-- https://mvnrepository.com/artifact/javax.servlet/jstl --> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-validator --> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-validator</artifactId> <version>5.3.6.Final</version> </dependency> </dependencies> <!-- 设定tomcat一些参数 字符集 端口--> <build> <plugins> <plugin> <groupId>org.apache.tomcat.maven</groupId> <artifactId>tomcat7-maven-plugin</artifactId> <version>2.2</version> <configuration> <uriEncoding>UTF-8</uriEncoding> </configuration> </plugin> </plugins> </build> </project>
4.数据的提取和业务的逻辑控制
控制层
package cn.ps.coutroller;
import cn.ps.entity.MySqlUser;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import cn.ps.service.EmpService;
import cn.ps.utils.PagerBean;
import org.springframework.ui.ModelMap;
import org.springframework.validation.Errors;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import javax.validation.Valid;
@Controller
public class DataCoutroller
{
@Autowired
private EmpService service;
/**
* 多条件搜索
* 传参 /emps?stu=1&curPage=2&pageNum=3
* @param stu
* @param curPage
* @param pageNum
* @param map
* @return
*/
@RequestMapping(value = "/emps", method = RequestMethod.GET)
public String listEmp(String stu, String curPage, String pageNum, ModelMap map)
{
try
{
PagerBean < MySqlUser > pb = service.queryClass(stu, curPage, pageNum);
map.put("pb", pb);
return "/showemp.jsp";
}
catch (Exception e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
@RequestMapping(value = "/emp", method = RequestMethod.POST)
public String addEmp(@Valid MySqlUser emp, Errors er, ModelMap map)
{
if (er.hasErrors())
{
return "/add.jsp";
}
service.addEmp(emp);
return listEmp(null, null, null, map);
}
@RequestMapping(value = "/emp/{id}", method = RequestMethod.PUT)
public String updateEmp(@PathVariable String id, @Valid MySqlUser emp, Errors er, ModelMap map)
{
emp.setId(Integer.parseInt(id));
if (er.hasErrors())
{
map.addAttribute("id", id);
return "/update.jsp";
}
service.updateEmp(emp);
return listEmp(null, null, null, map);
}
@RequestMapping(value = "/emp/{id}", method = RequestMethod.DELETE)
public String deleteEmp(@PathVariable String id, ModelMap map)
{
service.deleteEmp(id);
return listEmp(null, null, null, map);
}
}dao层（ 数据层）
package cn.ps.dao.impl;
import java.sql.SQLException;
import java.util.List;
import java.util.Map;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Repository;
import com.mysql.jdbc.StringUtils;
import cn.ps.dao.EmpDao;
import cn.ps.entity.MySqlUser;
@Repository
public class EmpDaoImpl implements EmpDao
{
@Autowired
private JdbcTemplate jdbcTemplate;
public int countEmp(String name) throws SQLException
{
String sql = "SELECT count(*) as myCount FROM stu1";
if (!StringUtils.isNullOrEmpty(name))
{
sql += " where name like '%" + name + "%'";
}
Map map = jdbcTemplate.queryForMap(sql);
return Integer.parseInt(map.get("myCount")
.toString());
}
public List < MySqlUser > queryClass(String name, int startIndex, int pageNum) throws Exception
{
String sql = "SELECT * FROM stu1";
if (!StringUtils.isNullOrEmpty(name))
{
sql += " where name like '%" + name + "%'";
}
sql += " limit " + startIndex + "," + pageNum;
List < MySqlUser > list = jdbcTemplate.query(sql, new BeanPropertyRowMapper < MySqlUser > (MySqlUser.class));
return list;
}
public void addEmp(MySqlUser emp)
{
String sql = "insert into stu1(name,age,eamil,sex,phone) values(?,?,?,?,?)";
jdbcTemplate.update(sql, emp.getName(), emp.getAge(), emp.getEamil(), emp.getSex(), emp.getPhone());
}
public void deleteEmp(String id)
{
String sql = "delete from stu1 where id=?";
jdbcTemplate.update(sql, id);
}
public void updateEmp(MySqlUser emp)
{
String sql = "update stu1 set name=?,age=?,eamil=?,sex=?,phone=? where id=?";
jdbcTemplate.update(sql, emp.getName(), emp.getAge(), emp.getEamil(), emp.getSex(), emp.getPhone(), emp.getId());
}
}Service层（ 服务层）
package cn.ps.service.impl;
import java.util.List;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import cn.ps.dao.EmpDao;
import cn.ps.entity.MySqlUser;
import cn.ps.service.EmpService;
import cn.ps.utils.PagerBean;
@Service
public class EmpServiceImpl implements EmpService
{
@Autowired
private EmpDao dao;
public PagerBean < MySqlUser > queryClass(String name, String curPage, String pageNum) throws Exception
{
//第一次访问 没有当前页
if (StringUtils.isEmpty(curPage))
{
curPage = "1";
}
if (StringUtils.isEmpty(pageNum))
{
pageNum = "10";
}
//转换成int类型
int curPageIn = Integer.parseInt(curPage);
int pageNumIn = Integer.parseInt(pageNum);
int total = dao.countEmp(name);
PagerBean < MySqlUser > pd = new PagerBean < MySqlUser > (curPageIn, pageNumIn, total);
List < MySqlUser > queryClass = dao.queryClass(name, pd.getStartIndex(), pd.getPageNum());
pd.setData(queryClass);
return pd;
}
public void addEmp(MySqlUser emp)
{
dao.addEmp(emp);
}
public void deleteEmp(String id)
{
dao.deleteEmp(id);
}
public void updateEmp(MySqlUser emp)
{
dao.updateEmp(emp);
}
}
``
`java
查询 jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<style type="text/css">
table{
border-collapse: collapse;
}
th{
border: 1px solid #ccc;
}
td{
border: 1px solid #ccc;
}
</style>
</head>
<body>
<form action="${pageContext.request.contextPath}/emps">
学生姓名:<input type="text" name='stu'><input type="submit" value="查询">
<input type="button" value="新增" onclick="window.location='${pageContext.request.contextPath}/add.jsp'">
</form>
<table style="width:80%">
<tr>
<td>id</td>
<td>学生姓名</td>
<td>年龄</td>
<td>邮箱</td>
<td>性别</td>
<td>手机号码</td>
<td>操作</td>
</tr>
<c:forEach var="tt" items="${requestScope.pb.data}">
<tr>
<td>${tt.id}</td>
<td>${tt.name}</td>
<td>${tt.age}</td>
<td>${tt.eamil}</td>
<td>${tt.sex}</td>
<td>${tt.phone}</td>
<td><form action="${pageContext.request.contextPath}/emp/${tt.id}" method="post">
<input type="hidden" name="_method" value="delete"/>
<input type="submit" value="删除"/>
<input type="button" value="修改"onclick="window.location='${pageContext.request.contextPath}/update.jsp?id=${tt.id}&name=${tt.name}&age=${tt.age}&eamil=${tt.eamil}&sex=${tt.sex}&phone=${tt.phone}'"/>
</form>
</td>
</tr>
</c:forEach>
</table>
<a href="${pageContext.request.contextPath}/emps?curPage=${requestScope.pb.prePage}&stu=${param.stu}">上一页</a>
<c:forEach var="i" begin="1" end="${requestScope.pb.totalPage}" step="1">
<a href="emps?curPage=${i}">${i}</a>
</c:forEach>
当前页是:${requestScope.pb.curPage} 总页数是:${requestScope.pb.totalPage} 总条数是:${requestScope.pb.total}
<a href="${pageContext.request.contextPath}/emps?curPage=${requestScope.pb.nextPage}&stu=${param.stu}">下一页</a>
</body>
</html>新增(add.jsp) <
% --
Created by IntelliJ IDEA.
User: Administrator
Date: 2018 - 11 - 07
Time: 上午 10: 47
To change this template use File | Settings | File Templates.
-- % >
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="s" uri="http://www.springframework.org/tags/form" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<form method="post" action="${pageContext.request.contextPath}/emp">
<h1>新增学生</h1>
<hr>
学生姓名:<input type="text" name="name"><font color="red"><s:errors path="mySqlUser.name"></s:errors> </font><br/>
年龄:<input type="text" name="age"><font color="red"><s:errors path="mySqlUser.age"></s:errors></font><br/>
邮箱:<input type="text" name="eamil"><font color="red"><s:errors path="mySqlUser.eamil"></s:errors></font><br/>
性别:<input type="text" name="sex"><br/>
手机号码:<input type="text" name="phone"><font color="red"><s:errors path="mySqlUser.phone"></s:errors></font><br/>
<input type="submit" value="提交">
<input type="button" value="返回"onclick="window.location='${pageContext.request.contextPath}/emps'">
<hr>
</form>
</body>
</html>修改(update.jsp) <
% --
Created by IntelliJ IDEA.
User: Administrator
Date: 2018 - 11 - 07
Time: 上午 10: 47
To change this template use File | Settings | File Templates.
-- % >
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="s" uri="http://www.springframework.org/tags/form" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<form method="post" action="${pageContext.request.contextPath}/emp/${param.id==null?requestScope.id:param.id}">
<input type="hidden" value="put" name="_method">
<h1>修改学生</h1>
<hr>
学生姓名:<input type="text" name="name" value="${param.name}"><font color="red"><s:errors path="mySqlUser.name"></s:errors> </font><br/>
年龄:<input type="text" name="age" value="${param.age}"><font color="red"><s:errors path="mySqlUser.age"></s:errors></font><br/>
邮箱:<input type="text" name="eamil" value="${param.eamil}"><font color="red"><s:errors path="mySqlUser.eamil"></s:errors></font><br/>
性别:<input type="text" name="sex" value="${param.sex}"><br/>
手机号码:<input type="text" name="phone" value="${param.phone}"><font color="red"><s:errors path="mySqlUser.phone"></s:errors></font><br/>
<input type="submit" value="提交">
<input type="button" value="返回"onclick="window.location='${pageContext.request.contextPath}/emps'">
<hr>
</form>
</body>
</html>更多的实例，请继续关注奇Q工具网的java实例栏目来进行了解吧。
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