springMVC注解

@ResponseBody

1.参数为String数组

@RequestMapping(value = "array.do")
public @ResponseBody String array(String[] name){
StringBuilder sbf = new StringBuilder();
for(String item : name){
sbf.append(item).append(" ");
}
return sbf.toString();
}

访问地址:http://localhost:8080/array.do?name=Tom&name=Lucy&name=Jim

2.参数为Integer包装类型和int基本类型

@RequestMapping(value = "baseType.do")
public @ResponseBody String baseType(int age){
return "age:"+age;
}

@RequestMapping(value = "baseType2.do")
public @ResponseBody String baseType2(Integer age){
return "age:"+age;
}

访问地址:前者

http://localhost:8080/baseType.do?age=10

http://localhost:8080/baseType.do //Error 500

http://localhost:8080/baseType.do?age=abc //Error 400

包装类型:

http://localhost:8080/baseType2.do?age=10

http://localhost:8080/baseType2.do

http://localhost:8080/baseType2.do?age=abc //Error 400

3.List类型

@RequestMapping(value = "list.do")
public @ResponseBody String list(UserListForm userListForm){
return "listSize:"+userListForm.getUsers().size() + "  " + userListForm.toString();
}

UserListForm类

public class UserListForm {
private List<User> users;

public List<User> getUsers() {
return users;
}

public void setUsers(List<User> users) {
this.users = users;
}

@Override
public String toString() {
return "UserListForm{" +
"users=" + users +
'}';
}
}

访问地址:

.name=Tom&users[1].name=Lucy]http://localhost:8080/list.do?users[0].name=Tom&users[1].name=Lucy

.name=Tom&users[1].name=Lucy&users[20].name=Jim]http://localhost:8080/list.do?users[0].name=Tom&users[1].name=Lucy&users[20].name=Jim

4.参数为set类型

@RequestMapping(value = "set.do")
public @ResponseBody String set(UserSetForm userSetForm){
return userSetForm.toString();
}

UserSetForm类

public class UserSetForm {
private Set<User> users;
private UserSetForm(){
users = new LinkedHashSet<User>();
users.add(new User());
users.add(new User());
}

public Set<User> getUsers() {
return users;
}

public void setUsers(Set<User> users) {
this.users = users;
}

@Override
public String toString() {
return "UserSetForm{" +
"users=" + users +
'}';
}
}

访问地址:.name=Tom&users[20].name=Lucy]http://localhost:8080/set.do?users[0].name=Tom&users[20].name=Lucy

5.参数为Map类型

@RequestMapping(value = "map.do")

public  @ResponseBody String map(UserMapForm userMapForm){
return userMapForm.toString();
}

UserMapForm类

public class UserMapForm {
private Map<String,User> users;

@Override
public String toString() {
return "UserMapForm{" +
"users=" + users +
'}';
}

public Map<String, User> getUsers() {
return users;
}

public void setUsers(Map<String, User> users) {
this.users = users;
}
}

访问地址:

http://localhost:8080/map.do?users[‘X’].name=Tom&users[‘X’].age=10&users[‘Y’].name=Lucy

6.文件上传

@RequestMapping(value="/doUpload", method=RequestMethod.POST)
public String doUploadFile(@RequestParam("file") MultipartFile file) throws IOException{
if(!file.isEmpty()){
log.debug("Process file: {}", file.getOriginalFilename());
FileUtils.copyInputStreamToFile(file.getInputStream(), new File("/home/yangshuangpeng/桌面/temp/imooc/", System.currentTimeMillis()+ file.getOriginalFilename()));
}
return "success";
}

视图层

<form method="post" action="/courses/doUpload" enctype="multipart/form-data">
<input type="file" name="file"/>
<input type="submit"/>
</form>

多文件上传

@RequestMapping(value="/doUpload2", method=RequestMethod.POST)
public String doUploadFile2(MultipartHttpServletRequest multiRequest) throws IOException{

Iterator<String> filesNames = multiRequest.getFileNames();
while(filesNames.hasNext()){
String fileName =filesNames.next();
MultipartFile file =  multiRequest.getFile(fileName);
if(!file.isEmpty()){
log.debug("Process file: {}", file.getOriginalFilename());
FileUtils.copyInputStreamToFile(file.getInputStream(), new File("/home/yangshuangpeng/桌面/temp/imooc/", System.currentTimeMillis()+ file.getOriginalFilename()));
}

}
return "success";
}

XML配置文件

<bean id="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="maxUploadSize" value="209715200" />
<property name="defaultEncoding" value="UTF-8" />
<property name="resolveLazily" value="true" />
</bean>

静态资源处理

<mvc:resources mapping="/resources/**" location="/resources/" />

Json文件处理

@RequestMapping(value="/{courseId}",method=RequestMethod.GET)
public @ResponseBody Course getCourseInJson(@PathVariable Integer courseId){
return  courseService.getCoursebyId(courseId);
}

@RequestMapping(value="/jsontype/{courseId}",method=RequestMethod.GET)
public  ResponseEntity<Course> getCourseInJson2(@PathVariable Integer courseId){
Course course =   courseService.getCoursebyId(courseId);
return new ResponseEntity<Course>(course, HttpStatus.OK);
}

XML配置

<!-- 配置ViewResolver。 可以用多个ViewResolver。 使用order属性排序。 InternalResourceViewResolver放在最后。 -->
<bean
class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
<property name="order" value="1" />
<property name="mediaTypes">
<map>
<entry key="json" value="application/json" />
<entry key="xml" value="application/xml" />
<entry key="htm" value="text/html" />
</map>
</property>

<property name="defaultViews">
<list>
<!-- JSON View -->
<bean
class="org.springframework.web.servlet.view.json.MappingJackson2JsonView">
</bean>
</list>
</property>
<property name="ignoreAcceptHeader" value="true" />
</bean>

pom.xml文件

<properties>
<commons-lang.version>2.6</commons-lang.version>
<slf4j.version>1.7.6</slf4j.version>
<spring.version>4.1.3.RELEASE</spring.version>
<jackson.version>2.5.4</jackson.version>
</properties>

<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-framework-bom</artifactId>
<version>${spring.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>

<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
</dependency>

<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.1.2</version>
</dependency>

<dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>1.1.2</version>
</dependency>

<dependency>
<groupId>commons-lang</groupId>
<artifactId>commons-lang</artifactId>
<version>${commons-lang.version}</version>
</dependency>

<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>${slf4j.version}</version>
<exclusions>
<exclusion>
<artifactId>slf4j-api</artifactId>
<groupId>org.slf4j</groupId>
</exclusion>
</exclusions>
</dependency>

<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>

<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
</dependency>

<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.1</version>
</dependency>

<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>${jackson.version}</version>
</dependency>