1:Jsp页面:
<td><img src="${ctx}/mongoImg/show"></td>
2:xml配置:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
xmlns:mongo="http://www.springframework.org/schema/data/mongo"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/data/mongo
http://www.springframework.org/schema/data/mongo/spring-mongo-1.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<mongo:mongo host="${resource.db.host}" port="${resource.db.port}" />
<mongo:db-factory id="mongoDbFactory" dbname="gate" mongo-ref="mongo" />
<bean class="org.springframework.data.mongodb.gridfs.GridFsTemplate">
<constructor-arg ref="mongoDbFactory" />
<constructor-arg ref="converter" />
</bean>
<mongo:mapping-converter id="converter"/>
</beans>
3:java后台代码
package com.crscic.igms.manager.web;
import java.io.OutputStream;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.mongodb.gridfs.GridFsTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import com.mongodb.gridfs.GridFSDBFile;
@Controller
@RequestMapping(value = "/mongoImg")
public class MongoImgController {
@Autowired
GridFsTemplate gridFsTemplate;
@RequestMapping(value = "/show")
public void show(HttpServletRequest req, HttpServletResponse resp){
try {
OutputStream out = resp.getOutputStream();
resp.setContentType("image/png");
List<GridFSDBFile> find = gridFsTemplate.find(null);
GridFSDBFile gridFSDBFile = find.get(0);
gridFSDBFile.writeTo(out);
out.flush();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
在JAVA代码中,因为只是个例子而已,所以我使用的是gridFsTemplate.find(null);查询的全部图片,而且数据库中只有2条数据,我这里就把第一条数据查出来作为例子了。各位可以根据自己的业务需要,在页面传递参数进来,并且查询特定的数据。