SpringMVC框架注解（转）

package com.cqvie.handler;import org.springframework.stereotype.Controller;&＃64;Controller
public class HelloWorld {&＃64;RequestMapping("/helloworld")public String sayHello() {System.out.println("Hello World!");return "success";}}

/*** Rest 风格的 URL&＃xff08;以 CRUD 为例&＃xff09;&＃xff1a;* 新增&＃xff1a;/order POST* 修改&＃xff1a;/order/1 PUT* 获取&＃xff1a;/order/1 GET* 删除&＃xff1a;/order/1 DELETE* &＃64;param id* &＃64;return*/&＃64;RequestMapping(value &＃61; "/testRestPut/{id}", method &＃61; RequestMethod.PUT)public String testRestPut(&＃64;PathVariable int id) {System.out.println("testRestPut:" &＃43; id);return SUCCESS;}&＃64;RequestMapping(value &＃61; "/testRestDelete/{id}", method &＃61; RequestMethod.DELETE)public String testRestDelete(&＃64;PathVariable int id) {System.out.println("testRestDelete:" &＃43; id);return SUCCESS;}&＃64;RequestMapping(value &＃61; "/testRestPost/{id}", method &＃61; RequestMethod.POST)public String testRestPost(&＃64;PathVariable int id) {System.out.println("testRestPost:" &＃43; id);return SUCCESS;}&＃64;RequestMapping("/testRestGet")public String testRestGet() {System.out.println("testRestGet");return SUCCESS;}

　　&＃64;RequestMapping("/testPojo")public String testPojo(User user) {System.out.println("testPojo:" &＃43; user);return "success";}

　　&＃64;RequestMapping("/testMap")public String testMap(Map map) {map.put("names", Arrays.asList("Tomcat", "Eclipse", "JavaEE"));return "success";}

　　&＃64;RequestMapping("/testModelAndView")public ModelAndView testModelAndView() {String viewName &＃61; SUCCESS;ModelAndView modelAndView &＃61; new ModelAndView(viewName);modelAndView.addObject("time", new Date());return modelAndView;}

public class HelloWorld{// 下面两种&＃64;Autowired只要使用一种即可&＃64;Autowiredprivate UserDao userDao; // 用于字段上&＃64;Autowiredpublic void setUserDao(UserDao userDao) { // 用于属性的方法上this.userDao &＃61; userDao;}
}

public class HelloWorld{
　　&＃64;Autowired
　　&＃64;Qualifier("userDao")
　　private UserDao userDao;
}

public class HelloWorld{// 下面两种&＃64;Resource只要使用一种即可&＃64;Resource(name&＃61;"userDao")private UserDao userDao; // 用于字段上&＃64;Resource(name&＃61;"userDao")public void setUserDao(UserDao userDao) { // 用于属性的setter方法上this.userDao &＃61; userDao;}
}

&＃64;Controller
public class TestController { &＃64;RequestMapping(value&＃61;"/user/{userId}/roles/{roleId}",method &＃61; RequestMethod.GET) public String getLogin(&＃64;PathVariable("userId") String userId, &＃64;PathVariable("roleId") String roleId){ System.out.println("User Id : " &＃43; userId); System.out.println("Role Id : " &＃43; roleId); return "hello"; } &＃64;RequestMapping(value&＃61;"/product/{productId}",method &＃61; RequestMethod.GET) public String getProduct(&＃64;PathVariable("productId") String productId){ System.out.println("Product Id : " &＃43; productId); return "hello"; } &＃64;RequestMapping(value&＃61;"/javabeat/{regexp1:[a-z-]&＃43;}", method &＃61; RequestMethod.GET) public String getRegExp(&＃64;PathVariable("regexp1") String regexp1){ System.out.println("URI Part 1 : " &＃43; regexp1); return "hello"; }
}

/*** 获取 Session* JSESSIONID&＃61;411A032E02A2594698F6E3F4458B9CE4*/&＃64;RequestMapping("/testCOOKIEValue")public String testCOOKIEValue(&＃64;COOKIEValue("JSESSIONID") String sessionId) {System.out.println("JSESSIONID &＃61; " &＃43; sessionId);return "success";}

/*** &＃64;RequestParam("id") 带参映射* &＃64;param id* &＃64;return*/&＃64;RequestMapping("/testRequestParam")public String testRequestParam(&＃64;RequestParam("id") int id) {System.out.println("testRequestParam " &＃43; id);return "success";}

package com.cqvie.yjq;import java.util.Map;import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.SessionAttributes;import com.cqvie.model.User;&＃64;SessionAttributes(value &＃61; {"user"}, types &＃61; {String.class})
&＃64;RequestMapping("/springmvc")
&＃64;Controller
public class SessionAttributesTest {/*** &＃64;SessionAttributes* 除了可以通过属性名指定需要放到会话中的属性外&＃xff08;value 属性值&＃xff09;&＃xff0c;* 还可以通过模型属性的对象类型指定哪些模型属性需要放到会话中&＃xff08;types 属性值&＃xff09;。* 注意&＃xff1a; 该注解只能放在类的上面&＃xff0c;不能放在方法上面* * &＃64;return*/&＃64;RequestMapping("/testSessionAttributes")public String testSessionAttributes(Map map) {User user &＃61; new User(1, "刘邦", "qwe", "123", "辽宁");map.put("user", user);map.put("school", "重庆");return "success";}
}

package com.cqvie.yjq;import java.util.Map;import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;import com.cqvie.model.User;&＃64;Controller
&＃64;RequestMapping("/springmvc")
public class ModelAttributeTest {private static final String SUCCESS &＃61; "success";/*** 1.有 &＃64;ModelAttribute 标记的方法&＃xff0c;会在每个目标方法执行之前被 SpringMVC 调用* 2.&＃64;ModelAttribute注解也可以修饰目标方法POJO类形的入参&＃xff0c;其value的属性值有如下作用&＃xff1a;* 1&＃xff09;SpringMVC会使用value属性值在implicitModel中查找对应的对象&＃xff0c;若存在则直接传入到目标方法的入参中* 2&＃xff09;SpringMVC会以value为key,POJO类型的对象为value&＃xff0c;存入的request中* * &＃64;param id* &＃64;param map*/&＃64;ModelAttributepublic void getUser(&＃64;RequestParam(value &＃61; "id", required &＃61; false) int id,Map map) {//模拟数据库中获取对象User user &＃61; new User(1, "刘邦", "123", "023", "重庆");System.out.println("从数据库中获取一个对象&＃xff1a;" &＃43; user);map.put("abc", user);}/*** 运行流程&＃xff1a;* 1.执行&＃64;ModelAttribute注解修饰的方法&＃xff0c;从数据库中取出对象&＃xff0c;把对象放入Map中&＃xff0c;键为&＃xff1a;user&＃xff1b;* 2.SpringMVC从Map中取出User对象&＃xff0c;并把表单的请求参数赋值给该User对象的对应属性&＃xff1b;* 3.SpringMVC把上述对象传入目标方法的参数。* * 注意&＃xff1a;在&＃64;ModelAttribute修饰的方法中&＃xff0c;放入到Map时的键需要和目标方法入参类型的第一个字母小写的字符串一致* * &＃64;param user* &＃64;return*/&＃64;RequestMapping("/testModelAttribute")public String testModelAttribute(&＃64;ModelAttribute("abc") User user) {System.out.println("修改&＃xff1a;" &＃43; user);return SUCCESS;}
}