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从最基本的Java工程搭建SpringMVC+SpringDataJPA+Hibernate

程序员文章站 2024-03-12 08:25:14
   本文会介绍从一个最基本的java工程,到web工程,到集成spring、springmvc、springdatajpa+hibernat...

   本文会介绍从一个最基本的java工程,到web工程,到集成spring、springmvc、springdatajpa+hibernate。

    平时我们可能是通过一个模板搭建一个工程,或者是直接导入一个项目,而本文选择从最基本的java工程开始,目的是为了展示更多原理。

    当然,我们还是从一个最基本的maven工程开始,其实普通的非maven工程,搭建过程几乎是一模一样的,只是jar包需要我们手动的添加到工程中,而maven工程就只是修改配置文件即可。

  下面就正式开始。

1、基于maven(如果不使用maven也可以用传统的工程)创建最基本的java工程

    新建工程,选择maven project,next:

    从最基本的Java工程搭建SpringMVC+SpringDataJPA+Hibernate

    勾选为简单的工程(create a simple project),next:

    从最基本的Java工程搭建SpringMVC+SpringDataJPA+Hibernate

    group id为你的域名反序,通常跟工程源码的包名对应,artifact id为这个group id中工程的唯一名,根据你的爱好,怎么填都行,然后finish:

    从最基本的Java工程搭建SpringMVC+SpringDataJPA+Hibernate

    这是得到的工程目录结构是这样的:

    从最基本的Java工程搭建SpringMVC+SpringDataJPA+Hibernate

  pom.xml就是maven的核心文件。

2、将工程设置为动态网页模式

  接下来就将工程转换为web工程,右键打开工程属性,如图,点击左边菜单中的project facets,然后点击convert to faceted from...:

    从最基本的Java工程搭建SpringMVC+SpringDataJPA+Hibernate

    在右边,我们勾选dynamic web module(动态网页),然后点ok:

    从最基本的Java工程搭建SpringMVC+SpringDataJPA+Hibernate

    这时会多出一个webcontent目录:

    从最基本的Java工程搭建SpringMVC+SpringDataJPA+Hibernate

    在web-inf目录下,添加web.xml文件,内如如下:

<?xml version="1.0" encoding="utf-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/xmlschema-instance"
 xmlns="http://java.sun.com/xml/ns/javaee"
xsi:schemalocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
 version="3.0">
 <display-name>springdatajpa</display-name>
 <welcome-file-list>
  <welcome-file>index.html</welcome-file>
 </welcome-file-list>
</web-app>

    然后添加一个欢迎页index.html:

<html>
<head>
</head>
<body>
<h1>hello word!</h1>
</body>
</html>

  这时目录结构如下:

    从最基本的Java工程搭建SpringMVC+SpringDataJPA+Hibernate

    这时,就可以右键工程,run on server了,可以看下效果:

    从最基本的Java工程搭建SpringMVC+SpringDataJPA+Hibernate

3、集成spring+springmvc

    新建包,并添加一些接口和类(具体代码后面会列出来),包结构如图:

    从最基本的Java工程搭建SpringMVC+SpringDataJPA+Hibernate

    需要添加jar包,直接修改pom文件即可,如果为普通工程,按pom.xml中的jar包,添加到工程中即可。

  首先添加使用的spring版本,方便统一管理,然后再添加所有需要的jar包,下面把此处需要的所有jar包添加进来,完成后的pom.xml如下:

<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>com.anxpp</groupid>
 <artifactid>springdatajpa</artifactid>
 <version>0.0.1-snapshot</version>
 <properties>
  <!-- spring版本号 -->
  <spring.version>4.2.5.release</spring.version>
 </properties>
 <dependencies>
  <!-- spring核心包 -->
  <dependency>
   <groupid>org.springframework</groupid>
   <artifactid>spring-core</artifactid>
   <version>${spring.version}</version>
  </dependency>
  <dependency>
   <groupid>org.springframework</groupid>
   <artifactid>spring-web</artifactid>
   <version>${spring.version}</version>
  </dependency>
  <dependency>
   <groupid>org.springframework</groupid>
   <artifactid>spring-orm</artifactid>
   <version>${spring.version}</version>
  </dependency>
  <dependency>
   <groupid>org.springframework</groupid>
   <artifactid>spring-tx</artifactid>
   <version>${spring.version}</version>
  </dependency>
  <dependency>
   <groupid>org.springframework</groupid>
   <artifactid>spring-jdbc</artifactid>
   <version>${spring.version}</version>
  </dependency>
  <dependency>
   <groupid>org.springframework</groupid>
   <artifactid>spring-webmvc</artifactid>
   <version>${spring.version}</version>
  </dependency>
  <dependency>
   <groupid>org.springframework</groupid>
   <artifactid>spring-aop</artifactid>
   <version>${spring.version}</version>
  </dependency>
  <dependency>
   <groupid>org.springframework</groupid>
   <artifactid>spring-context-support</artifactid>
   <version>${spring.version}</version>
  </dependency>
  <dependency>
   <groupid>org.springframework</groupid>
   <artifactid>spring-test</artifactid>
   <version>${spring.version}</version>
  </dependency>
  <dependency>
   <groupid>org.springframework</groupid>
   <artifactid>spring-orm</artifactid>
   <version>${spring.version}</version>
  </dependency>
  <dependency>
   <groupid>org.springframework.data</groupid>
   <artifactid>spring-data-jpa</artifactid>
   <version>1.10.1.release</version>
  </dependency>
 </dependencies>
</project>

    在web-inf目录下添加spring配置文件applicationcontext.xml,并添加如下内容:

<?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:aop="http://www.springframework.org/schema/aop" xmlns:p="http://www.springframework.org/schema/p"
 xmlns:tx="http://www.springframework.org/schema/tx" xmlns:mvc="http://www.springframework.org/schema/mvc"
 xsi:schemalocation="http://www.springframework.org/schema/beans
   http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
   http://www.springframework.org/schema/context
   http://www.springframework.org/schema/context/spring-context-4.2.xsd
   http://www.springframework.org/schema/tx
   http://www.springframework.org/schema/tx/spring-tx-4.2.xsd
   http://www.springframework.org/schema/aop 
   http://www.springframework.org/schema/aop/spring-aop-4.2.xsd
   http://www.springframework.org/schema/mvc 
   http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd">
 <!-- 开启ioc注解扫描 -->
 <context:component-scan base-package="com.anxpp.demo" />
 <!-- 开启mvc注解扫描 -->
 <mvc:annotation-driven />
</beans>

  修改web.xml,将spring添加进去:

<?xml version="1.0" encoding="utf-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/xmlschema-instance"
 xmlns="http://java.sun.com/xml/ns/javaee"
 xsi:schemalocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
 version="3.0">
 <display-name>springdatajpa</display-name>
 <listener>
  <listener-class>org.springframework.web.context.contextloaderlistener</listener-class>
 </listener>
 <context-param>
  <param-name>contextconfiglocation</param-name>
  <param-value>web-inf/applicationcontext.xml</param-value>
 </context-param>
 <servlet>
  <servlet-name>springmvc</servlet-name>
  <servlet-class>org.springframework.web.servlet.dispatcherservlet
  </servlet-class>
  <init-param>
   <param-name>contextconfiglocation</param-name>
   <param-value>classpath*:springmvc-servlet.xml</param-value>
  </init-param>
  <load-on-startup>1</load-on-startup>
 </servlet>
 <servlet-mapping>
  <servlet-name>springmvc</servlet-name>
  <url-pattern>/*</url-pattern>
 </servlet-mapping>
 <welcome-file-list>
  <welcome-file>index.html</welcome-file>
 </welcome-file-list>
</web-app>

    下面开始编写代码,注意注解不要忘记写,在本小节开始部分已经给出了包的层次结构。

    实体user:

package com.anxpp.demo.core.entity;
public class user {
 private integer id;
 private string name;
 public user(integer id, string name) {
  this.id = id;
  this.name = name;
 }
 public integer getid() {
  return id;
 }
 public void setid(integer id) {
  this.id = id;
 }
 public string getname() {
  return name;
 }
 public void setname(string name) {
  this.name = name;
 }
 @override
 public string tostring() {
  return "id:"+id+",name:"+name;
 }
}

    dao层接口userdao:

package com.anxpp.demo.core.dao;
import com.anxpp.demo.core.entity.user;
public interface userdao {
 user getuser(integer id,string name);
}

  dao层实现userdaoimpl:

package com.anxpp.demo.core.dao.impl;
import org.springframework.stereotype.repository;
import com.anxpp.demo.core.dao.userdao;
import com.anxpp.demo.core.entity.user;
@repository
public class userdaoimpl implements userdao{
 @override
 public user getuser(integer id, string name) {
  return new user(id, name);
 }
}

    service层接口userservice:

package com.anxpp.demo.core.service;
import com.anxpp.demo.core.entity.user;
public interface userservice {
 user getuser(integer id, string name);
}

    service层实现:

package com.anxpp.demo.core.service.impl;
import org.springframework.beans.factory.annotation.autowired;
import org.springframework.stereotype.service;
import com.anxpp.demo.core.dao.userdao;
import com.anxpp.demo.core.entity.user;
import com.anxpp.demo.core.service.userservice;
@service
public class userserviceimpl implements userservice{
 @autowired
 userdao userdao;
 @override
 public user getuser(integer id, string name) {
  return userdao.getuser(id, name);
 }
}

    controller层democontroller:

package com.anxpp.demo.controller;
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.anxpp.demo.core.service.userservice;
@controller
@requestmapping("/")
public class democontroller {
 @autowired
 userservice userservice;
 @requestmapping("/")
 @responsebody
 public string index(){
  return "index";
 }
 @requestmapping("/getuser")
 @responsebody
 public string getuser(integer id, string name){
  return userservice.getuser(id, name).tostring();
 }
}

    这是还不能直接run on server,因为jar包不会被一同发布,我们需要如下配置:

    右键工程选择属性,按下图配置:从最基本的Java工程搭建SpringMVC+SpringDataJPA+Hibernate

    这时候就可以运行测试了,效果如下:

    从最基本的Java工程搭建SpringMVC+SpringDataJPA+Hibernate

    从最基本的Java工程搭建SpringMVC+SpringDataJPA+Hibernate

  到这里,我们还没有操作数据库的。

4、添加返回json格式数据支持

    现在,我们常使用json作为数据传输的格式,下面就为springmvc添加返回json的支持

    首先添加jar包:

 <dependency>
   <groupid>com.fasterxml.jackson.core</groupid>
   <artifactid>jackson-databind</artifactid>
   <version>2.5.0</version>
  </dependency>
  <dependency>
   <groupid>com.fasterxml.jackson.core</groupid>
   <artifactid>jackson-core</artifactid>
   <version>2.5.0</version>
  </dependency>
  <dependency>
   <groupid>com.fasterxml.jackson.core</groupid>
   <artifactid>jackson-annotations</artifactid>
   <version>2.5.0</version>
  </dependency>

    然后改写getuser()方法如下:

@requestmapping("/getuser")
 @responsebody
 public map<string, object> getuser(integer id, string name){
  map<string, object> map = new hashmap<string, object>();
  map.put("state", "success");
  map.put("data", userservice.getuser(id, name));
  return map;
 }

  重新运行后访问效果如下:

    从最基本的Java工程搭建SpringMVC+SpringDataJPA+Hibernate

    此时,就可以返回json数据了。

5、配置静态资源访问

    通常情况下,web-inf目录下的资源,我们是无法直接访问的,如果我们的网站是html+ajax构成的,那么就可以在web-inf之外新建html的目录,并为web.xml配置默认的过滤器,不过注意要放到spingmvc过滤器之前:

 <servlet-mapping>
  <servlet-name>default</servlet-name>
  <url-pattern>*.html</url-pattern>
 </servlet-mapping>

 如果一定要访问web-inf目录内的资源,通过查阅spring官方文档,发现有两种方式

    1、手写一个资源映射器:

@configuration
@enablewebmvc
public class webconfig extends webmvcconfigureradapter {
 @override
 public void addresourcehandlers(resourcehandlerregistry registry) {
  registry.addresourcehandler("/resources/**")
    .addresourcelocations("/public-resources/")
    .setcachecontrol(cachecontrol.maxage(1, timeunit.hours).cachepublic());
 }
}

    可以看到,还可以设置缓存时间的,而更简单的方式,就是xml配置:

<mvc:resources mapping="/resources/**" location="/public-resources/">
 <mvc:cache-control max-age="3600" cache-public="true"/>
</mvc:resources>

    也可以加上下面的这个:

<!-- 对静态资源文件的访问,将无法mapping到controller的path交给default servlet handler处理-->
<mvc:default-servlet-handler /> 

6、乱码解决

    我们通常使用ajax提交请求,但也常用地址栏直接测试。请求提交分get和post。

使用post提交请求是,一般是不会出现中文乱码的,但是如果确实出现了乱码,可以通过在web.xml添加一个编码过滤器解决:

<filter>
  <filter-name>characterencoding</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>
  <init-param>
   <param-name>forceencoding</param-name>
   <param-value>true</param-value>
  </init-param>
 </filter>
 <filter-mapping>
  <filter-name>characterencoding</filter-name>
  <url-pattern>/*</url-pattern>
 </filter-mapping>

    上面只能解决post的中文乱码,对于get(含浏览器地址栏直接提交方式),我们需要修改tomcat配置,在conf目录下的server.xml中找到并如下修改:

 <connector connectiontimeout="20000" port="8080" protocol="http/1.1" redirectport="8443" uriencoding="utf-8"/>

  如果我们只是测试,项目并没有部署,可以直接在eclipse中的server下,找到server.xml,做出上面一样的改动即可:

从最基本的Java工程搭建SpringMVC+SpringDataJPA+Hibernate

7、整合springdatajpa+hibernate

    你可以通过这篇文字了解jpa:jpa规范介绍及实例(java数据持久化解决方案)

    springdatajpa也正是这样一种轻量级的解决方案,而首选的hibernate就实现了jpa。

  首先还是jar包,springdatajpa的jar包,在之前整合spring时已经一并加入,下面是hibernate(和mysql驱动)的jar包.

 <!-- hibernate -->
  <dependency>
   <groupid>org.hibernate</groupid>
   <artifactid>hibernate-core</artifactid>
   <version>${hibernate.version}</version>
  </dependency>
  <dependency>
   <groupid>org.hibernate</groupid>
   <artifactid>hibernate-ehcache</artifactid>
   <version>${hibernate.version}</version>
  </dependency>
  <dependency>
   <groupid>org.hibernate</groupid>
   <artifactid>hibernate-entitymanager</artifactid>
   <version>${hibernate.version}</version>
  </dependency>
  <dependency>
   <groupid>org.hibernate</groupid>
   <artifactid>hibernate-c3p0</artifactid>
   <version>${hibernate.version}</version>
  </dependency>
  <dependency>
   <groupid>mysql</groupid>
   <artifactid>mysql-connector-java</artifactid>
   <version>5.1.9</version>
  </dependency>

  统一管理的版本为:

 <!-- hibernate 版本号 -->
 <hibernate.version>5.1.0.final</hibernate.version>

  添加jpa的配置文件persistence.xml到meta-inf目录下,本文介绍时数据库使用mysql。并添加如下内容:

<?xml version="1.0" encoding="utf-8"?>
<persistence version="1.0"
 xmlns="http://java.sun.com/xml/ns/persistence"
 xmlns:xsi="http://www.w3.org/2001/xmlschema-instance" 
 xsi:schemalocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd">
 <persistence-unit name="demo" transaction-type="resource_local">
  <!-- provider>org.eclipse.persistence.jpa.persistenceprovider</provider -->
  <provider>org.hibernate.ejb.hibernatepersistence</provider>
  <class>com.ninelephas.meerkat.pojo.user</class>
  <!-- mysql 的连接 -->
  <properties>
   <property name="hibernate.connection.driver_class" value="com.mysql.jdbc.driver" />
   <property name="hibernate.connection.url" value="jdbc:mysql://127.0.0.1:3306/demo?createdatabaseifnotexist=true" />
   <property name="hibernate.connection.username" value="root" />
   <property name="hibernate.connection.password" value="root" />
   <property name="hibernate.dialect" value="org.hibernate.dialect.mysqldialect" />
  </properties>
 </persistence-unit>
</persistence>

  spring配置文件applicationcontext.xml中增加jpa支持后的完整内容:

<?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:aop="http://www.springframework.org/schema/aop" xmlns:p="http://www.springframework.org/schema/p"
 xmlns:tx="http://www.springframework.org/schema/tx" xmlns:mvc="http://www.springframework.org/schema/mvc"
 xmlns:jpa="http://www.springframework.org/schema/data/jpa"
 xsi:schemalocation="http://www.springframework.org/schema/beans
   http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
   http://www.springframework.org/schema/context
   http://www.springframework.org/schema/context/spring-context-4.2.xsd
   http://www.springframework.org/schema/tx
   http://www.springframework.org/schema/tx/spring-tx-4.2.xsd
   http://www.springframework.org/schema/aop 
   http://www.springframework.org/schema/aop/spring-aop-4.2.xsd
   http://www.springframework.org/schema/mvc 
   http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd
   http://www.springframework.org/schema/data/jpa 
   http://www.springframework.org/schema/data/jpa/spring-jpa.xsd">
 <!-- 开启ioc注解扫描 -->
 <context:component-scan base-package="com.anxpp.demo" />
 <bean id="entitymanagerfactory"
  class="org.springframework.orm.jpa.localcontainerentitymanagerfactorybean">
  <property name="jpavendoradapter">
   <bean class="org.springframework.orm.jpa.vendor.hibernatejpavendoradapter">
    <property name="generateddl" value="true" />
    <property name="database" value="mysql" />
   </bean>
  </property>
  <property name="persistenceunitname" value="demo" />
 </bean>
 <!-- 开启mvc注解扫描 -->
 <mvc:annotation-driven />
 <bean
  class="org.springframework.web.servlet.view.contentnegotiatingviewresolver">
  <property name="viewresolvers">
   <list>
    <bean
     class="org.springframework.web.servlet.view.internalresourceviewresolver">
     <property name="prefix" value="/web-inf/view/" />
     <property name="suffix" value=".html" />
    </bean>
   </list>
  </property>
  <!-- 用于将对象转换为 json -->
  <property name="defaultviews">
   <list>
    <bean
     class="org.springframework.web.servlet.view.json.mappingjackson2jsonview" />
   </list>
  </property>
 </bean>
 <!-- 对静态资源文件的访问,将无法mapping到controller的path交给default servlet handler处理 -->
 <mvc:default-servlet-handler />
 <!-- 配置事务管理器 -->
 <bean id="transactionmanager" class="org.springframework.orm.jpa.jpatransactionmanager">
  <property name="entitymanagerfactory" ref="entitymanagerfactory" />
 </bean>
 <!-- 启用 annotation事务 -->
 <tx:annotation-driven transaction-manager="transactionmanager" />
 <!-- 配置spring data jpa扫描目录 -->
 <jpa:repositories base-package="com.anxpp.demo" />
</beans>

  修改实体:

package com.anxpp.demo.core.entity;
import javax.persistence.entity;
import javax.persistence.generatedvalue;
import javax.persistence.generationtype;
import javax.persistence.id;
import javax.persistence.table;
@entity
@table
public class user {
 @id
 @generatedvalue(strategy = generationtype.auto)
 private integer id;
 private string name;
 public user() {
 }
 public user(string name) {
  this.name = name;
 }
 public integer getid() {
  return id;
 }
 public void setid(integer id) {
  this.id = id;
 }
 public string getname() {
  return name;
 }
 public void setname(string name) {
  this.name = name;
 }
 @override
 public string tostring() {
  return "id:"+id+",name:"+name;
 }
}

  可以删掉dao层实现了,我们记住将dao层接口继承自强大的jparepository:

public interface userdao extends jparepository<user, serializable>{
 user findbyid(integer id);
}

  是不是看上去特别简洁,而且都不需要写实现的,springdatajpa会自动帮我们完成。

   修改service层接口:

package com.anxpp.demo.core.service;
import java.util.list;
import com.anxpp.demo.core.entity.user;
public interface userservice {
 user findbyid(integer id);
 user save(string name);
 list<user> findall();
}

  修改service层实现:

package com.anxpp.demo.core.service.impl;
import java.util.list;
import org.springframework.beans.factory.annotation.autowired;
import org.springframework.stereotype.service;
import com.anxpp.demo.core.dao.userdao;
import com.anxpp.demo.core.entity.user;
import com.anxpp.demo.core.service.userservice;
@service
public class userserviceimpl implements userservice{
 @autowired
 userdao userdao;
 @override
 public user findbyid(integer id) {
  return userdao.findbyid(id);
 }
 @override
 public user save(string name) {
  return userdao.save(new user(name));
 }
 @override
 public list<user> findall() {
  return userdao.findall();
 }
}

    修改controller,提供多个测试接口:

package com.anxpp.demo.controller;
import java.util.hashmap;
import java.util.map;
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.anxpp.demo.core.service.userservice;
@controller
@requestmapping("/")
public class democontroller {
 @autowired
 userservice userservice;
 @requestmapping("/")
 @responsebody
 public string index(){
  return "index";
 }
 @requestmapping("/info")
 public string info(){
  return "info";
 }
 @requestmapping("/findall")
 @responsebody
 public map<string, object> getuser(){
  map<string, object> map = new hashmap<string, object>();
  map.put("state", "success");
  map.put("data", userservice.findall());
  return map;
 }
 @requestmapping("/findbyid")
 @responsebody
 public map<string, object> findbyid(integer id){
  map<string, object> map = new hashmap<string, object>();
  map.put("state", "success");
  map.put("data", userservice.findbyid(id));
  return map;
 }
 @requestmapping("/add")
 @responsebody
 public map<string, object> save(string name){
  map<string, object> map = new hashmap<string, object>();
  map.put("state", "success");
  map.put("data", userservice.save(name));
  return map;
 }
}

  运行效果:

    从最基本的Java工程搭建SpringMVC+SpringDataJPA+Hibernate

    从最基本的Java工程搭建SpringMVC+SpringDataJPA+Hibernate

从最基本的Java工程搭建SpringMVC+SpringDataJPA+Hibernate

  那么,如果需要添加一个查找id大于指定值的指定姓氏的数据呢?

  如果是sql,我们会这样写(?表示参数):

select * from user where id>? and name like '?%';

但是这里,我们连sql(或者hql)都可以不用写,直接在dao层接口添加一个方法即可:

 list<user> findbyidgreaterthanandnamelike(integer id,string name);

你不需要怀疑,上面的方法执行偏偏就是能成功(注意:service实现的使用,调用该方法记得name+"%")!

以上所述是小编给大家介绍的从最基本的java工程搭建springmvc+springdatajpa+hibernate的相关知识,希望对大家有所帮助,如果大家想了解更多资讯敬请关注网站!