Spring MVC + Spring MongoDB + Querydsl 通过maven整合实例
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='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="${index+1}"/>
</c:forEach>
</table>
<hr>
<input type="button" value="首页" onclick="javascript:location.href='login'">
</body>
</html>
greeting.jsp
<%@page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<%@taglib prefix="form" uri="http://www.springframework.org/tags/form" %> <html>
<head>
<meta http-equiv='Content-Type' content='text/html; charset=UTF-8'/>
<title></title>
</head>
<body>
<form:form action="login">
<table>
<tr>
<td colspan="2">
恭喜您, 用户${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='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; @Controller
public 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 = "q", defaultValue = "") 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; @Service
public 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
@Entity
public 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; @Repository
public 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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