小编sne*_*eha的帖子

实际上这个restTemplate.exchange()方法做了什么？

@RequestMapping(value = "/getphoto", method = RequestMethod.GET)
public void getPhoto(@RequestParam("id") Long id, HttpServletResponse response) {

    logger.debug("Retrieve photo with id: " + id);

    // Prepare acceptable media type
    List<MediaType> acceptableMediaTypes = new ArrayList<MediaType>();
    acceptableMediaTypes.add(MediaType.IMAGE_JPEG);

    // Prepare header
    HttpHeaders headers = new HttpHeaders();
    headers.setAccept(acceptableMediaTypes);
    HttpEntity<String> entity = new HttpEntity<String>(headers);

    // Send the request as GET
    ResponseEntity<byte[]> result = 
        restTemplate.exchange("http://localhost:7070/spring-rest-provider/krams/person/{id}", 
                              HttpMethod.GET, entity, byte[].class, id);

    // Display the image
    Writer.write(response, result.getBody());
}

我正在使用maven.Iam在spring MVC上做一个项目.在运行project.Iam时遇到错误java.lang.ClassNotFoundException:org.apache.commons.dbcp.BasicDataSource我包含了所有的依赖项,我认为..我的代码.等待你的回复

web.xml中

  <?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">
  <servlet>
 <servlet-name>AccPerSpring</servlet-name>
 <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
 <init-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>/WEB-INF/servlet-context.xml</param-value>
 </init-param>
    <load-on-startup>1</load-on-startup>
 </servlet>
    <servlet-mapping>
       <servlet-name>AccPerSpring</servlet-name>
       <url-pattern>/</url-pattern>
    </servlet-mapping>
 </web-app>

servlet的context.xml中

  <?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:mvc="http://www.springframework.org/schema/mvc"              xmlns:beans="http://www.springframework.org/schema/beans"
  xmlns:context="http://www.springframework.org/schema/context"   xmlns:tx="http://www.springframework.org/schema/tx"
  xsi:schemaLocation="http://www.springframework.org/schema/mvc    http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd">

   <!-- Enable @Controller annotation support -->
   <mvc:annotation-driven />


   <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
         <property name="prefix" value="/WEB-INF/" />
         <property name="suffix" value=".jsp" />
   </bean>
  <context:component-scan base-package="com.gerrytan.pizzashop"/>
  <bean id="myDataSource" class=" org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> 
       <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
       <property name="url" value="jdbc:mysql://localhost:3306/mydatabase"/>
       <property name="username" value="root"/> …

我正在用 maven 做一个关于 spring MVC 的项目。我使用 Ajax 将我的数据传递给控制器​​。没关系..但是当我调用删除函数时，我得到了 org.hibernate.MappingException: Unknown entity: java.lang。整数 。在我的代码下方..等待您的回复

网页.xml

            <?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">
            <servlet>
            <servlet-name>AccPerSpring</servlet-name>
            <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
            <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>/WEB-INF/servlet-context.xml</param-value>
            </init-param>
            <load-on-startup>1</load-on-startup>
            </servlet>
            <servlet-mapping>
            <servlet-name>AccPerSpring</servlet-name>
            <url-pattern>/</url-pattern>
            </servlet-mapping>
            </web-app>

spring-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:mvc="http://www.springframework.org/schema/mvc"xmlns:beans="http://www.springframework.org/schema/beans"xmlns:context="http://www.springframework.org/schema/context"xmlns:tx="http://www.springframework.org/schema/tx"
            xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd">

             <!-- Enable @Controller annotation support -->
             <mvc:annotation-driven />

             <!-- Map simple view name such as "test" into /WEB-INF/views/test.jsp -->
            <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/" />
<property name="suffix" value=".jsp" /> …