SpringMVC-请求与相应

一、环境准备

<dependencies>
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>3.1.0</version>
      <scope>provided</scope>  //确定范围避免与tomcat冲突
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId> //启动spring内的webmvc
      <version>5.2.10.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.9.0</version>
    </dependency>
  </dependencies>

  <build>
    <plugins>
      <plugin>
        <groupId>org.apache.tomcat.maven</groupId>
        <artifactId>tomcat7-maven-plugin</artifactId>
        <version>2.1</version>
        <configuration>
          <port>80</port>
          <path>/</path>
          <uriEncoding>UTF-8</uriEncoding>  //此处是解决tomcat中文乱码问题
        </configuration>
      </plugin>
    </plugins>
  </build>

二、请求

1.设置映射路径

优化后的：可以到看，user和book类中都有save()方法，故应该在类上添加@RequestMapping()来区分两个类。

@Controller
@RequestMapping("/user")
public class UserController {
@RequestMapping("/save")
@ResponseBody
public String save(){
System.out.println("user save ...");
return "{'module':'user save'}";
}
@RequestMapping("/delete")
@ResponseBody
public String save(){
System.out.println("user delete ...");
return "{'module':'user delete'}";
}
}
@Controller
@RequestMapping("/book")
public class BookController {
@RequestMapping("/save")
@ResponseBody
public String save(){
System.out.println("book save ...");
return "{'module':'book save'}";
}
}