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  • 004 使用SpringMVC开发restful API二--编写用户详情

    一:编写用户详情服务

    1.任务

      @PathVariable隐射url片段到java方法的参数

      在url声明中使用正则表达式

      @JsonView控制json输出内容

    二:@PathVariable

    1.@PathVariable小测试

      测试类

    1 @Test
    2     public void whenGetInfoSuccess() throws Exception {
    3         //发送请求
    4         mockMvc.perform(MockMvcRequestBuilders.get("/user/1")
    5                 .contentType(MediaType.APPLICATION_JSON_UTF8))
    6             .andExpect(MockMvcResultMatchers.status().isOk())
    7             .andExpect(MockMvcResultMatchers.jsonPath("$.username").value("tom"));
    8     }

      控制类

    1 @RequestMapping(value="/user/{id}",method=RequestMethod.GET)
    2     public User getInfo(@PathVariable(value="idid") String idid){
    3         System.out.println("id="+idid);
    4         User user=new User();
    5         user.setUsername("tom");
    6         return user;
    7     }

    2.效果

      

    三:url声明中的正则表达式

    1.测试

      测试类

     1 /**
     2      * 测试url声明的正则表达式
     3      * @throws Exception
     4      */
     5     @Test
     6     public void whenGetInfoFail() throws Exception {
     7         //发送请求
     8         mockMvc.perform(MockMvcRequestBuilders.get("/user/aa")
     9                 .contentType(MediaType.APPLICATION_JSON_UTF8))
    10             .andExpect(MockMvcResultMatchers.status().is4xxClientError());
    11     }

      控制类

        只许传递的id为数字。

    1 @RequestMapping(value="/user/{id:\d+}",method=RequestMethod.GET)
    2     public User getInfo(@PathVariable(value="idid") String idid){
    3         System.out.println("id="+idid);
    4         User user=new User();
    5         user.setUsername("tom");
    6         return user;
    7     }

    四:@JsonView

    1.说明

      以过滤序列化对象的字段属性,可以使你有选择的序列化对象

    2.使用步骤

      使用接口来声明多个视图

      在值对象的get方法上指定视图

      在controller方法上指定视图

    3.按照步骤实现一个场景

      

    4.程序

      完成前两步

     1 package com.cao.dto;
     2 
     3 import com.fasterxml.jackson.annotation.JsonView;
     4 
     5 public class User {
     6     //接口
     7     public interface UserSimpleView {};
     8     public interface UserDetailView extends UserSimpleView {};    //继承之后,可以展示父的所有
     9     
    10     private String username;
    11     private String password;
    12     
    13     @JsonView(UserSimpleView.class)
    14     public String getUsername() {
    15         return username;
    16     }
    17     public void setUsername(String username) {
    18         this.username = username;
    19     }
    20     
    21     @JsonView(UserDetailView.class)
    22     public String getPassword() {
    23         return password;
    24     }
    25     public void setPassword(String password) {
    26         this.password = password;
    27     }
    28     
    29 }

      完成第三步

     1 package com.cao.web.controller;
     2 
     3 import static org.mockito.Matchers.contains;
     4 
     5 import java.util.ArrayList;
     6 import java.util.List;
     7 
     8 import org.apache.commons.lang.builder.ReflectionToStringBuilder;
     9 import org.apache.commons.lang.builder.ToStringStyle;
    10 import org.springframework.data.domain.Pageable;
    11 import org.springframework.data.web.PageableDefault;
    12 import org.springframework.web.bind.annotation.PathVariable;
    13 import org.springframework.web.bind.annotation.RequestMapping;
    14 import org.springframework.web.bind.annotation.RequestMethod;
    15 import org.springframework.web.bind.annotation.RequestParam;
    16 import org.springframework.web.bind.annotation.RestController;
    17 
    18 import com.cao.dto.User;
    19 import com.cao.dto.UserQueryCondition;
    20 import com.fasterxml.jackson.annotation.JsonView;
    21 
    22 //此controller可以提供restful服务
    23 @RestController
    24 public class UserController {
    25     @RequestMapping(value="/user",method=RequestMethod.GET)
    26     @JsonView(User.UserSimpleView.class)
    27     public List<User> query(UserQueryCondition condition,@PageableDefault(size=13) Pageable pageable){
    28         //反射的方法来打印
    29         System.out.println(ReflectionToStringBuilder.toString(condition, ToStringStyle.MULTI_LINE_STYLE));
    30         //
    31         System.out.println(pageable.getPageSize());
    32         System.out.println(pageable.getPageNumber());
    33         System.out.println(pageable.getSort());
    34         //
    35         List<User> userList=new ArrayList<>();
    36         userList.add(new User());
    37         userList.add(new User());
    38         userList.add(new User());
    39         return userList;
    40     }
    41     
    42     @RequestMapping(value="/user/{id:\d+}",method=RequestMethod.GET)
    43     @JsonView(User.UserDetailView.class)
    44     public User getInfo(@PathVariable(value="id") String idid){
    45         System.out.println("id="+idid);
    46         User user=new User();
    47         user.setUsername("tom");
    48         return user;
    49     }
    50 
    51 }

      测试类一:

     1 /*
     2      * 测试几个常见的声明
     3      */
     4     @Test
     5     public void whenQuerySuccess() throws Exception {
     6         //发送请求
     7         String result=mockMvc.perform(MockMvcRequestBuilders.get("/user")
     8                 .param("username", "Job")
     9                 .param("age", "18")
    10                 .param("xxx", "XXX")
    11                 //分页,查第三页,每页15条,按照age降序
    12 //                    .param("page", "3")
    13 //                    .param("size", "15")
    14 //                    .param("sort", "age,desc")
    15                 //
    16                 .contentType(MediaType.APPLICATION_JSON_UTF8))
    17             .andExpect(MockMvcResultMatchers.status().isOk())
    18             .andExpect(MockMvcResultMatchers.jsonPath("$.length()").value(3))
    19             .andReturn().getResponse().getContentAsString();
    20         System.out.println("result="+result);
    21     }

      效果

      

      测试类二

     1 /**
     2      * 测试pathVariable
     3      * @throws Exception
     4      */
     5     @Test
     6     public void whenGetInfoSuccess() throws Exception {
     7         //发送请求
     8         String result=mockMvc.perform(MockMvcRequestBuilders.get("/user/1")
     9                 .contentType(MediaType.APPLICATION_JSON_UTF8))
    10             .andExpect(MockMvcResultMatchers.status().isOk())
    11             .andExpect(MockMvcResultMatchers.jsonPath("$.username").value("tom"))
    12             .andReturn().getResponse().getContentAsString();
    13         System.out.println("result="+result);
    14     }

      效果

      

    五:重构代码

    1.重构服务

      @RequestMapping("/user")

      @GetMapping

     1 package com.cao.web.controller;
     2 
     3 import static org.mockito.Matchers.contains;
     4 
     5 import java.util.ArrayList;
     6 import java.util.List;
     7 
     8 import org.apache.commons.lang.builder.ReflectionToStringBuilder;
     9 import org.apache.commons.lang.builder.ToStringStyle;
    10 import org.springframework.data.domain.Pageable;
    11 import org.springframework.data.web.PageableDefault;
    12 import org.springframework.web.bind.annotation.GetMapping;
    13 import org.springframework.web.bind.annotation.PathVariable;
    14 import org.springframework.web.bind.annotation.RequestMapping;
    15 import org.springframework.web.bind.annotation.RequestMethod;
    16 import org.springframework.web.bind.annotation.RequestParam;
    17 import org.springframework.web.bind.annotation.RestController;
    18 
    19 import com.cao.dto.User;
    20 import com.cao.dto.UserQueryCondition;
    21 import com.fasterxml.jackson.annotation.JsonView;
    22 
    23 //此controller可以提供restful服务
    24 @RestController
    25 @RequestMapping("/user")
    26 public class UserController {
    27 //    @RequestMapping(value="/user",method=RequestMethod.GET)
    28     @JsonView(User.UserSimpleView.class)
    29     @GetMapping
    30     public List<User> query(UserQueryCondition condition,@PageableDefault(size=13) Pageable pageable){
    31         //反射的方法来打印
    32         System.out.println(ReflectionToStringBuilder.toString(condition, ToStringStyle.MULTI_LINE_STYLE));
    33         //
    34         System.out.println(pageable.getPageSize());
    35         System.out.println(pageable.getPageNumber());
    36         System.out.println(pageable.getSort());
    37         //
    38         List<User> userList=new ArrayList<>();
    39         userList.add(new User());
    40         userList.add(new User());
    41         userList.add(new User());
    42         return userList;
    43     }
    44     
    45 //    @RequestMapping(value="/user/{id:\d+}",method=RequestMethod.GET)
    46     @JsonView(User.UserDetailView.class)
    47     @GetMapping(value="/{id:\d+}")
    48     public User getInfo(@PathVariable(value="id") String idid){
    49         System.out.println("id="+idid);
    50         User user=new User();
    51         user.setUsername("tom");
    52         return user;
    53     }
    54 
    55 }

    2.重新跑测试类

      这里主要是验证重构代码后的正确性。

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  • 原文地址:https://www.cnblogs.com/juncaoit/p/9697119.html
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