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Spring MVC + Spring MongoDB + Querydsl 通过maven整合实例

2024-07-18 14:00:19   214人阅读

效果图

一共3个页面：注册页，欢迎页，用户列表页

很简单的例子，主要是为了把流程走通，没有各种验证。

注册页：

　　

欢迎页：

　　

用户列表页：

　　

 

源码地址

https://github.com/lemonbar/spring-framework-mongodb

 

参考文档

Spring framework: http://docs.spring.io/spring/docs/4.0.6.RELEASE/spring-framework-reference/htmlsingle/#spring-web

Spring data mongodb: http://docs.spring.io/spring-data/data-mongo/docs/1.5.2.RELEASE/reference/html/

Querydsl: http://www.querydsl.com/static/querydsl/latest/reference/html/index.html

 

代码实现(使用maven构建)

Spring MVC

maven的依赖

<dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-context</artifactId>            <version>${spring.framework.version}</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-webmvc</artifactId>            <version>${spring.framework.version}</version>        </dependency>        <dependency>            <groupId>taglibs</groupId>            <artifactId>standard</artifactId>            <version>1.1.2</version>        </dependency>        <dependency>            <groupId>jstl</groupId>            <artifactId>jstl</artifactId>            <version>1.2</version>        </dependency>

taglibs和jstl是为jsp中的标签服务的.

web.xml

<web-app xmlns="http://java.sun.com/xml/ns/javaee"         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"         version="3.0">    <context-param>        <param-name>contextConfigLocation</param-name>        <param-value>WEB-INF/root-context.xml</param-value>    </context-param>    <servlet>        <servlet-name>dispatcher</servlet-name>        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>        <init-param>            <param-name>contextConfigLocation</param-name>            <param-value></param-value>        </init-param>        <load-on-startup>1</load-on-startup>    </servlet>    <servlet-mapping>        <servlet-name>dispatcher</servlet-name>        <url-pattern>/</url-pattern>    </servlet-mapping>    <!-- Set Character Encoding-->    <filter>        <filter-name>CharacterEncodingFilter</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>    </filter>    <filter-mapping>        <filter-name>CharacterEncodingFilter</filter-name>        <url-pattern>/*</url-pattern>    </filter-mapping>    <!-- Set Character Encoding-->    <filter>        <filter-name>hiddenHttpMethodFilter</filter-name>        <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>    </filter>    <filter-mapping>        <filter-name>hiddenHttpMethodFilter</filter-name>        <url-pattern>/*</url-pattern>    </filter-mapping>    <listener>        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>    </listener></web-app>

注意：关于filter的定义顺序，CharacterEncodingFilter必须放在HiddenHttpMethodFilter之前，否则会有中文乱码的问题。(filter的执行是按照定义顺序执行的)。

CharacterEncodingFilter，是为了中文编码

HiddenHttpMethodFilter，因为html中的form表单只支持GET与POST请求，spring为了支持DELETE, PUT等操作，会在生成页面代码时，会把我们希望的操作添加到一个hidden的_method中，在外层通过post传过去，所以我们需要通过HiddenHttpMethodFilter把真实的操作解析出来。

我们定义的 vs. 真实传输的

<form:form action="xxx" method="put"></form:form>
<form id="xxx" action="xxx" method="post">    <input type="hidden" name="_method" value="put"/></form>

root-context.xml

<?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"       xmlns:mongo="http://www.springframework.org/schema/data/mongo"       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        http://www.springframework.org/schema/data/mongo        http://www.springframework.org/schema/data/mongo/spring-mongo.xsd">    <context:component-scan base-package="com.lemon.spring"/>    <!-- 添加注解驱动 -->    <mvc:annotation-driven/>    <!-- 允许对静态资源文件的访问 -->    <mvc:default-servlet-handler/>    <bean id="viewResolver"          class="org.springframework.web.servlet.view.InternalResourceViewResolver">        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>        <property name="prefix" value="/WEB-INF/jsp/"/>        <property name="suffix" value=".jsp"/>    </bean>

这儿只贴了前半部分和spring mvc相关的，后面的会在mongodb那部分贴出来。

login.jsp

<%@page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %><%@taglib prefix="form" uri="http://www.springframework.org/tags/form" %><html><head>    <meta http-equiv=‘Content-Type‘ content=‘text/html; charset=UTF-8‘/>    <title></title></head><body><form:form commandName="user" action="signin">    <table>        <tr>            <td>First Name:</td>            <td><form:input path="firstName"/></td>        </tr>        <tr>            <td>Last Name:</td>            <td><form:input path="lastName"/></td>        </tr>        <tr>            <td>                <input type="submit" value="注册"/>            </td>            <td>                <input type="button" value="用户列表" onclick="javascript:location.href=http://www.mamicode.com/‘user_list‘">            </td>        </tr>    </table></form:form></body></html>

user_list.jsp

<%@page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %><%@taglib prefix="sf" uri="http://www.springframework.org/tags/form" %><%@taglib prefix="c" uri="http://java.sun.com/jstl/core_rt" %><html><head>    <meta http-equiv=‘Content-Type‘ content=‘text/html; charset=UTF-8‘/>    <title>User List</title></head><body><form action="user_list">    <table>        <tr>            <td>查询条件</td>            <td>                <input type="text" name="q"/>            </td>            <td>                <input type="submit" value="查询"/>            </td>        </tr>    </table></form><hr><table border="1">    <tr>        <td>index</td>        <td><font>firstName</font></td>        <td><font>lastName</font></td>    </tr>    <c:set var="index" value="1"/>    <c:forEach var="u" items="${userList}">        <tr>            <td>${index}</td>            <td>${u.firstName}</td>            <td>${u.lastName}</td>        </tr>        <c:set var="index" value="${index+1}"/>    </c:forEach></table><hr><input type="button" value="首页" onclick="javascript:location.href=http://www.mamicode.com/‘login‘"></body></html>

greeting.jsp

<%@page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %><%@taglib prefix="form" uri="http://www.springframework.org/tags/form" %><html><head>    <meta http-equiv=‘Content-Type‘ content=‘text/html; charset=UTF-8‘/>    <title></title></head><body><form:form action="login">    <table>        <tr>            <td colspan="2">                恭喜您, 用户${firstName}注册成功!            </td>        </tr>        <tr>            <td>                <input type="submit" value="首页"/>            </td>            <td>                <input type="button" value="用户列表" onclick="javascript:location.href=http://www.mamicode.com/‘user_list‘">            </td>        </tr>    </table></form:form></body></html>

LoginController.java

package com.lemon.spring.controller;import com.lemon.spring.domain.User;import com.lemon.spring.service.IUserService;import org.springframework.stereotype.Controller;import org.springframework.ui.Model;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestParam;import javax.annotation.Resource;import java.util.List;@Controllerpublic class LoginController {    @Resource    private IUserService userService;    @RequestMapping("/login")    public String login(Model model) {        User user = userService.initUser();        model.addAttribute(user);        return "login";    }    @RequestMapping("/signin")    public String signin(User user,                         Model model) {//        userService.saveUser(user);        userService.insertUser(user);//        User savedUser = userService.getUserByFirstName(user.getFirstName());        model.addAttribute("firstName", user.getFirstName());        return "greeting";    }    @RequestMapping("/user_list")    public String userList(Model model, @RequestParam(required = false, value = "http://www.mamicode.com/q", defaultValuehttp://www.mamicode.com/= "") String q) {        List<User> userList;        if (q == "") {            userList = userService.getUserList();        } else {            userList = userService.getUserListByFirstName(q);        }        model.addAttribute("userList", userList);        return "user_list";    }}

service和domain

IUserService.java

package com.lemon.spring.service;import com.lemon.spring.domain.User;import java.util.List;public interface IUserService {    User initUser();    boolean saveUser(User user);    List<User> getUserList();    List<User> getUserListByFirstName(String firstName);    User getUserByFirstName(String firstName);    void insertUser(User user);}

UserService.java

package com.lemon.spring.service.impl;import com.lemon.spring.domain.QUser;import com.lemon.spring.domain.User;import com.lemon.spring.repository.IPersonRepository;import com.lemon.spring.repository.UserRepository;import com.lemon.spring.service.IUserService;import org.springframework.stereotype.Service;import javax.annotation.Resource;import java.util.List;@Servicepublic class UserService implements IUserService {    @Resource    private UserRepository userRepository;    @Resource    private IPersonRepository personRepository;    @Override    public User initUser() {        User user = new User();        return user;    }    @Override    public boolean saveUser(User user) {        User u = userRepository.save(user);        if (u != null) {            return true;        }        return false;    }    @Override    public List<User> getUserList() {        return userRepository.findAll();    }    @Override    public List<User> getUserListByFirstName(String firstName) {        QUser user = QUser.user;        return (List<User>)userRepository.findAll(user.firstName.contains(firstName));    }    @Override    public User getUserByFirstName(String firstName) {        return userRepository.findByFirstName(firstName).get(0);    }    @Override    public void insertUser(User user) {        personRepository.insert(user);    }}

User.java

@Data@Entitypublic class User {//    @Id//    private String id;    private String firstName;    private String lastName;}

maven的pom.xml要引入两个dependency，lombok为自动生成get/set方法使用，hibernate-jpa-2.0-api是为了javax.presistence.Entity.

<dependency>            <groupId>org.projectlombok</groupId>            <artifactId>lombok</artifactId>            <version>1.14.4</version>        </dependency><dependency><groupId>org.hibernate.javax.persistence</groupId><artifactId>hibernate-jpa-2.0-api</artifactId><version>1.0.0.Final</version></dependency>

Spring MongoDB

root-context.xml

    <mongo:mongo host="localhost" port="27017">        <mongo:options/>    </mongo:mongo>    <mongo:db-factory dbname="springdb" mongo-ref="mongo"/>    <bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate">        <constructor-arg name="mongoDbFactory" ref="mongoDbFactory"/>    </bean>    <mongo:repositories base-package="com.lemon.spring.repository"/>

其中关于mongodb的定义，按名称应该可以猜的出来，也可以参考官方文档。

maven依赖

        <dependency>            <groupId>org.springframework.data</groupId>            <artifactId>spring-data-mongodb</artifactId>            <version>1.5.2.RELEASE</version>        </dependency>

UserRepository.java

package com.lemon.spring.repository;import com.lemon.spring.domain.User;import org.springframework.data.mongodb.repository.MongoRepository;import org.springframework.data.querydsl.QueryDslPredicateExecutor;import java.util.List;public interface UserRepository extends MongoRepository<User, String>{    List<User> findByFirstName(String firstName);}

UserRepository直接继承MongoRepository，默认已经提供了很多方法，比如save，不需要自己写实现。

如果需要更多的查询，可以按照方法的命名机制来进行定义。

 

当然除了直接继承自MongoRepository外，还可以直接使用context中定义的mongotemplate，来自己定义接口和实现，参考下面两个java文件

IPersonRepository.java

package com.lemon.spring.repository;import com.lemon.spring.domain.User;public interface IPersonRepository {    void insert(User user);}

PersonRepository.java

package com.lemon.spring.repository.impl;import com.lemon.spring.domain.User;import com.lemon.spring.repository.IPersonRepository;import org.springframework.data.mongodb.core.MongoOperations;import org.springframework.stereotype.Repository;import javax.annotation.Resource;@Repositorypublic class PersonRepository implements IPersonRepository {    @Resource    private MongoOperations mongoTemplate;    @Override    public void insert(User user) {        mongoTemplate.insert(user);    }}

Querydsl

Querydsl为我们提供了更多功能的查询，详细介绍请参考官网http://www.querydsl.com/static/querydsl/latest/reference/html/index.html

首先maven中添加依赖

<dependency>            <groupId>com.mysema.querydsl</groupId>            <artifactId>querydsl-apt</artifactId>            <version>${querydsl.version}</version>            <scope>provided</scope>        </dependency>        <dependency>            <groupId>com.mysema.querydsl</groupId>            <artifactId>querydsl-mongodb</artifactId>            <version>${querydsl.version}</version>        </dependency>        <dependency>            <groupId>com.mysema.querydsl</groupId>            <artifactId>querydsl-jpa</artifactId>            <version>${querydsl.version}</version>        </dependency>        <dependency>            <groupId>org.slf4j</groupId>            <artifactId>slf4j-log4j12</artifactId>            <version>1.6.1</version>        </dependency>

然后修改UserRepository

public interface UserRepository extends MongoRepository<User, String>, QueryDslPredicateExecutor<User> {    List<User> findByFirstName(String firstName);}

maven中添加plugin

 <plugin>                <groupId>com.mysema.maven</groupId>                <artifactId>apt-maven-plugin</artifactId>                <version>1.0.9</version>                <executions>                    <execution>                        <goals>                            <goal>process</goal>                        </goals>                        <configuration>                            <outputDirectory>target/generated-sources/java</outputDirectory>                            <processor>com.mysema.query.apt.jpa.JPAAnnotationProcessor</processor>                        </configuration>                    </execution>                </executions>            </plugin>

根据@Entity来生成类。


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