spring + struts2 + mybatis整合
阿新 • • 發佈：2019-01-25
我接觸最多的java持久層的框架應該是hibernate了，但是看一些企業招聘好多都要求會mybatis，所以學習了並整合了一下。
對於hibernate和mybatis的優缺點下片文章再細講，我們先來整合。
首先整合spring+struts2，引入他們的jar包，這裡直接給出我引入所有包的圖：
首先在web.xml檔案中配置spring的監聽器：
<listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener>
classpath下新增spring的配置檔案spring.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" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd "> <!-- 自動掃描dao和service包(自動注入) --> <context:component-scan base-package="com.dxy.service" /> </beans>
在web.xml檔案中新增：
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring.xml,classpath:springmybatis.xml</param-value>
</context-param>用來指定spring的配置檔案。
注意：讓spring來管理你的action，我們得新增struts2-spring-plugin.jar。
然後在classpath下新增struts.xml檔案：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" "http://struts.apache.org/dtds/struts-2.3.dtd">
<struts>
<!-- 指定由spring負責action物件的建立 -->
<constant name="struts.objectFactory" value="spring" />
<!-- 所有匹配*.action的請求都由struts2處理 -->
<constant name="struts.action.extension" value="action" />
<!-- 是否啟用開發模式 -->
<constant name="struts.devMode" value="true" />
<!-- struts配置檔案改動後，是否重新載入 -->
<constant name="struts.configuration.xml.reload" value="true" />
<!-- 設定瀏覽器是否快取靜態內容 -->
<constant name="struts.serve.static.browserCache" value="false" />
<!-- 請求引數的編碼方式 -->
<constant name="struts.i18n.encoding" value="utf-8" />
<!-- 每次HTTP請求系統都重新載入資原始檔，有助於開發 -->
<constant name="struts.i18n.reload" value="true" />
<!-- 檔案上傳最大值 -->
<constant name="struts.multipart.maxSize" value="104857600" />
<!-- 讓struts2支援動態方法呼叫 -->
<constant name="struts.enable.DynamicMethodInvocation" value="true" />
<!-- Action名稱中是否還是用斜線 -->
<constant name="struts.enable.SlashesInActionNames" value="false" />
<!-- 允許標籤中使用表示式語法 -->
<constant name="struts.tag.altSyntax" value="true" />
<!-- 對於WebLogic,Orion,OC4J此屬性應該設定成true -->
<constant name="struts.dispatcher.parametersWorkaround" value="false" />
<!--用於WEB-INF下的頁面的跳轉 -->
<package name="skip" namespace="/skip" extends="struts-default">
</package>
</struts>
注意：讓spring幫我們來管理action，struts.xml檔案中得加入
<!-- 指定由spring負責action物件的建立 -->
<constant name="struts.objectFactory" value="spring" />上文中已加入。
接著整合mybatis，在classpath下新增springmybatis.xml檔案：
springmybatis.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"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
<context:property-placeholder location="classpath:jdbc.properties" />
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property name="driverClassName" value="${jdbc.driver}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
</bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="mapperLocations" value="classpath:com/dxy/mapper/*.xml" />
<property name="typeAliasesPackage" value="com.dxy.model" />
</bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.dxy.mapper" />
</bean>
</beans>
感覺和spring整合hibernate差別不大。
建立自己的類：
Blog.java
package com.dxy.model;
public class Blog {
private int id;
private String title;
private String content;
private String owner;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getContent() {
return content;
}
public void setContent(String content) {
this.content = content;
}
public String getOwner() {
return owner;
}
public void setOwner(String owner) {
this.owner = owner;
}
}
BlogService.java
package com.dxy.service;
import java.util.List;
import com.dxy.model.Blog;
public interface BlogService {
public Blog selectBlog(int id);
public void insertBlog(Blog blog);
public void updateBlog(Blog blog);
public void deleteBlog(int id);
public List<Blog> selectAll();
}
建立BlogMapper.java:
package com.dxy.mapper;
import java.util.List;
import com.dxy.model.Blog;
public interface BlogMapper {
public Blog selectBlog(int id);
public void insertBlog(Blog blog);
public void updateBlog(Blog blog);
public void deleteBlog(int id);
public List<Blog> selectAll();
}
建立BlogMapper.java的配置檔案BlogMapper.xml:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.dxy.mapper.BlogMapper">
<resultMap type="com.dxy.model.Blog" id="blogMapper">
<result property="id" column="id"/>
<result property="title" column="title"/>
<result property="content" column="content"/>
<result property="owner" column="owner"/>
</resultMap>
<!-- 新增記錄 -->
<insert id="insertBlog" parameterType="Blog" useGeneratedKeys="true" keyProperty="id">
insert into t_blog(title,content,owner) values(#{title},#{content},#{owner})
</insert>
<!-- 查詢單條記錄 -->
<select id="selectBlog" parameterType="int" resultMap="blogMapper">
select * from t_blog where id = #{id}
</select>
<!-- 修改記錄 -->
<update id="updateBlog" parameterType="Blog">
update t_blog set title = #{title},content = #{content},owner = #{owner} where id = #{id}
</update>
<!-- 查詢所有記錄 -->
<select id="selectAll" resultMap="blogMapper">
select * from t_blog
</select>
<!-- 刪除記錄 -->
<delete id="deleteBlog" parameterType="int">
delete from t_blog where id = #{id}
</delete>
</mapper>
建立service的實現類BlogServiceImpl.java：
package com.dxy.service.impl;
import java.util.List;
import javax.annotation.Resource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import org.springframework.stereotype.Service;
import com.dxy.mapper.BlogMapper;
import com.dxy.model.Blog;
import com.dxy.service.BlogService;
@Service("blogService")
public class BlogServiceImpl implements BlogService {
private BlogMapper blogMapper;
@Override
public Blog selectBlog(int id) {
return blogMapper.selectBlog(id);
}
@Override
public void insertBlog(Blog blog) {
blogMapper.insertBlog(blog);
}
@Override
public void updateBlog(Blog blog) {
blogMapper.updateBlog(blog);
}
@Override
public void deleteBlog(int id) {
blogMapper.deleteBlog(id);
}
@Override
public List<Blog> selectAll() {
return blogMapper.selectAll();
}
public BlogMapper getBlogMapper() {
return blogMapper;
}
@Resource
public void setBlogMapper(BlogMapper blogMapper) {
this.blogMapper = blogMapper;
}
}
在新增BlogMapper.xml時，在查詢時有查詢結果，在BlogMapper.xml檔案中得定義resultMap：
<resultMap type="com.dxy.model.Blog" id="blogMapper">
<result property="id" column="id"/>
<result property="title" column="title"/>
<result property="content" column="content"/>
<result property="owner" column="owner"/>
</resultMap>
接下來新增action類BlogAction.java：
package com.dxy.action;
import org.apache.struts2.convention.annotation.Action;
import org.apache.struts2.convention.annotation.Namespace;
import org.apache.struts2.convention.annotation.Result;
import org.apache.struts2.convention.annotation.Results;
import org.springframework.beans.factory.annotation.Autowired;
import com.dxy.model.Blog;
import com.dxy.service.BlogService;
@Namespace("/")
@Results({
@Result(name="addBlog",location="/index.jsp")
})
@Action("blogAction")
public class BlogAction {
private BlogService blogService;
public String addBlog() {
Blog blog = new Blog();
blog.setTitle("test");
blog.setContent("test1");
blog.setOwner("test3");
blogService.insertBlog(blog);
System.out.println("test");
Blog blog2 = blogService.selectBlog(1);
System.out.println(blogService.selectBlog(1));
System.out.println(blog2.getContent());
return "addBlog";
}
public BlogService getBlogService() {
return blogService;
}
@Autowired
public void setBlogService(BlogService blogService) {
this.blogService = blogService;
}
}
檢查資料庫和後臺輸出。資料庫有資料後臺列印test，整合完成。
經檢驗，上述程式正常執行。