springcloud服务模块化 springcloud common 模块

一 搭建springcloud 业务模块

1 新建maven配置

• File-->new project seetings -->settings for new project
• 这里配置好,每次新建工程,都应用这个配置

1 新建Empty project 工程: springcloud1

2  新建maven模块:sp01-commons  ,用于存放业务模块中的通用代码

 3.配置maven环境,基础环境配置

 

 JDK版本:8

 工程编码:

4.pom.xml添加依赖

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>cn.tedu</groupId>
    <artifactId>sp01-commons</artifactId>
    <version>1.0-SNAPSHOT</version>
    <dependencies>
        <dependency>
            <groupId>com.fasterxml.jackson.module</groupId>
            <artifactId>jackson-module-parameter-names</artifactId>
            <version>2.9.8</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.datatype</groupId>
            <artifactId>jackson-datatype-jdk8</artifactId>
            <version>2.9.8</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.datatype</groupId>
            <artifactId>jackson-datatype-jsr310</artifactId>
            <version>2.9.8</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.datatype</groupId>
            <artifactId>jackson-datatype-guava</artifactId>
            <version>2.9.8</version>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
           <1-- <version>1.18.18</version> 这个版本可能导致找不到符号,就使用12版本-->
            <version>1.18.12</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.26</version>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.9</version>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.0</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

5.编辑代码

5.1 商品/用户/订单实体类--model层

创建enity包,也就是pojo包封装数据

第一步:创建商品类

package cn.tedu.sp01.entity;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
/*商品类*/
@Data
@NoArgsConstructor
@AllArgsConstructor
public class Item {
    private Integer id;
    private String name;
    private Integer number;
}

第二步:创建用户类

package cn.tedu.sp01.entity;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
/*用户类*/
@Data
@NoArgsConstructor
@AllArgsConstructor
public class User {
    private Integer id;
    private String username;
    private String password;
}

第三步:创建订单类

package cn.tedu.sp01.entity;

import java.util.List;

/*订单类*/
@Data
@NoArgsConstructor
@AllArgsConstructor
public class Order {
    private String id;
    private User user; //订单所属的用户
    private List<Item> items;//购买的商品列表,因为用户不只购买一两个商品
}

 

 

 5.2 三个业务接口--业务层service        

service包创建接口

第一步:商品业务

package cn.tedu.sp01.service;

import cn.tedu.sp01.entity.Item;

import java.util.List;
/*商品业务*/
public interface ItemService {
    //获取一个订单中的商品列表
    List<Item> getItems(String orderId);

    //减少商品库存
    void decreaseNumber(List<Item> items);


}

第二步:用户业务

package cn.tedu.sp01.service;

import cn.tedu.sp01.entity.User;

/*用户业务*/
public interface UserService {
    //获取用户
    User getUser(Integer userId);
    //增加用户积分
    void addScore(Integer userId,Integer score);
}

   第三步:用户的订单业务

package cn.tedu.sp01.service;

import cn.tedu.sp01.entity.Order;
/*订单接口*/
public interface OrderService {
    //获取订单
    Order getOrder(String orderId);
    //添加订单
    void addOrder(Order order);
}

6 三个工具类:CookieUtil  /  JsonUtil    /JsonResult

创建cn.tedu.web.util包,其中web包和sp1包同级

这三个工具类以后直接复制粘贴即可

第一步:创建CookieUtil类

package cn.tedu.web.util;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class CookieUtil {

    /**
     * @param response
     * @param name
     * @param value
     * @param maxAge
     */
    public static void setCookie(HttpServletResponse response,
                                 String name, String value, String domain, String path, int maxAge) {
        Cookie cookie = new Cookie(name, value);
        if(domain != null) {
            cookie.setDomain(domain);
        }
        cookie.setPath(path);
        cookie.setMaxAge(maxAge);
        response.addCookie(cookie);
    }
    public static void setCookie(HttpServletResponse response, String name, String value, int maxAge) {
        setCookie(response, name, value, null, "/", maxAge);
    }
    public static void setCookie(HttpServletResponse response, String name, String value) {
        setCookie(response, name, value, null, "/", 3600);
    }
    public static void setCookie(HttpServletResponse response, String name) {
        setCookie(response, name, "", null, "/", 3600);
    }

    /**
     * @param request
     * @param name
     * @return
     */
    public static String getCookie(HttpServletRequest request, String name) {
        String value = null;
        Cookie[] cookies = request.getCookies();
        if (null != cookies) {
            for (Cookie cookie : cookies) {
                if (cookie.getName().equals(name)) {
                    value = cookie.getValue();
                }
            }
        }
        return value;
    }

    /**
     * @param response
     * @param name
     * @return
     */
    public static void removeCookie(HttpServletResponse response, String name, String domain, String path) {
        setCookie(response, name, "", domain, path, 0);
    }

}

第二步: 创建JsonUtil类

package cn.tedu.web.util;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Writer;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.net.URL;
import java.nio.charset.StandardCharsets;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;

import org.apache.commons.lang3.StringUtils;

import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.databind.node.ObjectNode;
import com.fasterxml.jackson.datatype.guava.GuavaModule;
import com.fasterxml.jackson.datatype.jdk8.Jdk8Module;
import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
import com.fasterxml.jackson.module.paramnames.ParameterNamesModule;

import lombok.extern.slf4j.Slf4j;

@Slf4j
public class JsonUtil {
    private static ObjectMapper mapper;
    private static JsonInclude.Include DEFAULT_PROPERTY_INCLUSION = JsonInclude.Include.NON_DEFAULT;
    private static boolean IS_ENABLE_INDENT_OUTPUT = false;
    private static String CSV_DEFAULT_COLUMN_SEPARATOR = ",";
    static {
        try {
            initMapper();
            configPropertyInclusion();
            configIndentOutput();
            configCommon();
        } catch (Exception e) {
            log.error("jackson config error", e);
        }
    }

    private static void initMapper() {
        mapper = new ObjectMapper();
    }

    private static void configCommon() {
        config(mapper);
    }

    private static void configPropertyInclusion() {
        mapper.setSerializationInclusion(DEFAULT_PROPERTY_INCLUSION);
    }

    private static void configIndentOutput() {
        mapper.configure(SerializationFeature.INDENT_OUTPUT, IS_ENABLE_INDENT_OUTPUT);
    }

    private static void config(ObjectMapper objectMapper) {
        objectMapper.enable(JsonGenerator.Feature.WRITE_BIGDECIMAL_AS_PLAIN);
        objectMapper.enable(DeserializationFeature.ACCEPT_EMPTY_STRING_AS_NULL_OBJECT);
        objectMapper.enable(DeserializationFeature.ACCEPT_SINGLE_VALUE_AS_ARRAY);
        objectMapper.enable(DeserializationFeature.FAIL_ON_READING_DUP_TREE_KEY);
        objectMapper.enable(DeserializationFeature.FAIL_ON_NUMBERS_FOR_ENUMS);
        objectMapper.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
        objectMapper.disable(DeserializationFeature.FAIL_ON_NULL_FOR_PRIMITIVES);
        objectMapper.disable(SerializationFeature.FAIL_ON_EMPTY_BEANS);
        objectMapper.enable(JsonParser.Feature.ALLOW_COMMENTS);
        objectMapper.disable(JsonGenerator.Feature.ESCAPE_NON_ASCII);
        objectMapper.enable(JsonGenerator.Feature.IGNORE_UNKNOWN);
        objectMapper.enable(JsonParser.Feature.ALLOW_UNQUOTED_FIELD_NAMES);
        objectMapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
        objectMapper.setDateFormat(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"));
        objectMapper.enable(JsonParser.Feature.ALLOW_SINGLE_QUOTES);
        objectMapper.registerModule(new ParameterNamesModule());
        objectMapper.registerModule(new Jdk8Module());
        objectMapper.registerModule(new JavaTimeModule());
        objectMapper.registerModule(new GuavaModule());
    }
    public static void setSerializationInclusion(JsonInclude.Include inclusion) {
        DEFAULT_PROPERTY_INCLUSION = inclusion;
        configPropertyInclusion();
    }

    public static void setIndentOutput(boolean isEnable) {
        IS_ENABLE_INDENT_OUTPUT = isEnable;
        configIndentOutput();
    }

    public static <V> V from(URL url, Class<V> c) {
        try {
            return mapper.readValue(url, c);
        } catch (IOException e) {
            log.error("jackson from error, url: {}, type: {}", url.getPath(), c, e);
            return null;
        }
    }

    public static <V> V from(InputStream inputStream, Class<V> c) {
        try {
            return mapper.readValue(inputStream, c);
        } catch (IOException e) {
            log.error("jackson from error, type: {}", c, e);
            return null;
        }
    }

    public static <V> V from(File file, Class<V> c) {
        try {
            return mapper.readValue(file, c);
        } catch (IOException e) {
            log.error("jackson from error, file path: {}, type: {}", file.getPath(), c, e);
            return null;
        }
    }

    public static <V> V from(Object jsonObj, Class<V> c) {
        try {
            return mapper.readValue(jsonObj.toString(), c);
        } catch (IOException e) {
            log.error("jackson from error, json: {}, type: {}", jsonObj.toString(), c, e);
            return null;
        }
    }

    public static <V> V from(String json, Class<V> c) {
        try {
            return mapper.readValue(json, c);
        } catch (IOException e) {
            log.error("jackson from error, json: {}, type: {}", json, c, e);
            return null;
        }
    }

    public static <V> V from(URL url, TypeReference<V> type) {
        try {
            return mapper.readValue(url, type);
        } catch (IOException e) {
            log.error("jackson from error, url: {}, type: {}", url.getPath(), type, e);
            return null;
        }
    }

    public static <V> V from(InputStream inputStream, TypeReference<V> type) {
        try {
            return mapper.readValue(inputStream, type);
        } catch (IOException e) {
            log.error("jackson from error, type: {}", type, e);
            return null;
        }
    }

    public static <V> V from(File file, TypeReference<V> type) {
        try {
            return mapper.readValue(file, type);
        } catch (IOException e) {
            log.error("jackson from error, file path: {}, type: {}", file.getPath(), type, e);
            return null;
        }
    }

    public static <V> V from(Object jsonObj, TypeReference<V> type) {
        try {
            return mapper.readValue(jsonObj.toString(), type);
        } catch (IOException e) {
            log.error("jackson from error, json: {}, type: {}", jsonObj.toString(), type, e);
            return null;
        }
    }

    public static <V> V from(String json, TypeReference<V> type) {
        try {
            return mapper.readValue(json, type);
        } catch (IOException e) {
            log.error("jackson from error, json: {}, type: {}", json, type, e);
            return null;
        }
    }

    public static <V> String to(List<V> list) {
        try {
            return mapper.writeValueAsString(list);
        } catch (JsonProcessingException e) {
            log.error("jackson to error, obj: {}", list, e);
            return null;
        }
    }

    public static <V> String to(V v) {
        try {
            return mapper.writeValueAsString(v);
        } catch (JsonProcessingException e) {
            log.error("jackson to error, obj: {}", v, e);
            return null;
        }
    }

    public static <V> void toFile(String path, List<V> list) {
        try (Writer writer = new FileWriter(new File(path), true)) {
            mapper.writer().writeValues(writer).writeAll(list);
            writer.flush();
        } catch (Exception e) {
            log.error("jackson to file error, path: {}, list: {}", path, list, e);
        }
    }

    public static <V> void toFile(String path, V v) {
        try (Writer writer = new FileWriter(new File(path), true)) {
            mapper.writer().writeValues(writer).write(v);
            writer.flush();
        } catch (Exception e) {
            log.error("jackson to file error, path: {}, obj: {}", path, v, e);
        }
    }

    public static String getString(String json, String key) {
        if (StringUtils.isEmpty(json)) {
            return null;
        }
        try {
            JsonNode node = mapper.readTree(json);
            if (null != node) {
                return node.get(key).toString();
            } else {
                return null;
            }
        } catch (IOException e) {
            log.error("jackson get string error, json: {}, key: {}", json, key, e);
            return null;
        }
    }

    public static Integer getInt(String json, String key) {
        if (StringUtils.isEmpty(json)) {
            return null;
        }
        try {
            JsonNode node = mapper.readTree(json);
            if (null != node) {
                return node.get(key).intValue();
            } else {
                return null;
            }
        } catch (IOException e) {
            log.error("jackson get int error, json: {}, key: {}", json, key, e);
            return null;
        }
    }

    public static Long getLong(String json, String key) {
        if (StringUtils.isEmpty(json)) {
            return null;
        }
        try {
            JsonNode node = mapper.readTree(json);
            if (null != node) {
                return node.get(key).longValue();
            } else {
                return null;
            }
        } catch (IOException e) {
            log.error("jackson get long error, json: {}, key: {}", json, key, e);
            return null;
        }
    }

    public static Double getDouble(String json, String key) {
        if (StringUtils.isEmpty(json)) {
            return null;
        }
        try {
            JsonNode node = mapper.readTree(json);
            if (null != node) {
                return node.get(key).doubleValue();
            } else {
                return null;
            }
        } catch (IOException e) {
            log.error("jackson get double error, json: {}, key: {}", json, key, e);
            return null;
        }
    }

    public static BigInteger getBigInteger(String json, String key) {
        if (StringUtils.isEmpty(json)) {
            return new BigInteger(String.valueOf(0.00));
        }
        try {
            JsonNode node = mapper.readTree(json);
            if (null != node) {
                return node.get(key).bigIntegerValue();
            } else {
                return null;
            }
        } catch (IOException e) {
            log.error("jackson get biginteger error, json: {}, key: {}", json, key, e);
            return null;
        }
    }

    public static BigDecimal getBigDecimal(String json, String key) {
        if (StringUtils.isEmpty(json)) {
            return null;
        }
        try {
            JsonNode node = mapper.readTree(json);
            if (null != node) {
                return node.get(key).decimalValue();
            } else {
                return null;
            }
        } catch (IOException e) {
            log.error("jackson get bigdecimal error, json: {}, key: {}", json, key, e);
            return null;
        }
    }

    public static boolean getBoolean(String json, String key) {
        if (StringUtils.isEmpty(json)) {
            return false;
        }
        try {
            JsonNode node = mapper.readTree(json);
            if (null != node) {
                return node.get(key).booleanValue();
            } else {
                return false;
            }
        } catch (IOException e) {
            log.error("jackson get boolean error, json: {}, key: {}", json, key, e);
            return false;
        }
    }

    public static byte[] getByte(String json, String key) {
        if (StringUtils.isEmpty(json)) {
            return null;
        }
        try {
            JsonNode node = mapper.readTree(json);
            if (null != node) {
                return node.get(key).binaryValue();
            } else {
                return null;
            }
        } catch (IOException e) {
            log.error("jackson get byte error, json: {}, key: {}", json, key, e);
            return null;
        }
    }

    public static <T> ArrayList<T> getList(String json, String key) {
        if (StringUtils.isEmpty(json)) {
            return null;
        }
        String string = getString(json, key);
        return from(string, new TypeReference<ArrayList<T>>() {});
    }

    public static <T> String add(String json, String key, T value) {
        try {
            JsonNode node = mapper.readTree(json);
            add(node, key, value);
            return node.toString();
        } catch (IOException e) {
            log.error("jackson add error, json: {}, key: {}, value: {}", json, key, value, e);
            return json;
        }
    }

    private static <T> void add(JsonNode jsonNode, String key, T value) {
        if (value instanceof String) {
            ((ObjectNode) jsonNode).put(key, (String) value);
        } else if (value instanceof Short) {
            ((ObjectNode) jsonNode).put(key, (Short) value);
        } else if (value instanceof Integer) {
            ((ObjectNode) jsonNode).put(key, (Integer) value);
        } else if (value instanceof Long) {
            ((ObjectNode) jsonNode).put(key, (Long) value);
        } else if (value instanceof Float) {
            ((ObjectNode) jsonNode).put(key, (Float) value);
        } else if (value instanceof Double) {
            ((ObjectNode) jsonNode).put(key, (Double) value);
        } else if (value instanceof BigDecimal) {
            ((ObjectNode) jsonNode).put(key, (BigDecimal) value);
        } else if (value instanceof BigInteger) {
            ((ObjectNode) jsonNode).put(key, (BigInteger) value);
        } else if (value instanceof Boolean) {
            ((ObjectNode) jsonNode).put(key, (Boolean) value);
        } else if (value instanceof byte[]) {
            ((ObjectNode) jsonNode).put(key, (byte[]) value);
        } else {
            ((ObjectNode) jsonNode).put(key, to(value));
        }
    }

    public static String remove(String json, String key) {
        try {
            JsonNode node = mapper.readTree(json);
            ((ObjectNode) node).remove(key);
            return node.toString();
        } catch (IOException e) {
            log.error("jackson remove error, json: {}, key: {}", json, key, e);
            return json;
        }
    }

    public static <T> String update(String json, String key, T value) {
        try {
            JsonNode node = mapper.readTree(json);
            ((ObjectNode) node).remove(key);
            add(node, key, value);
            return node.toString();
        } catch (IOException e) {
            log.error("jackson update error, json: {}, key: {}, value: {}", json, key, value, e);
            return json;
        }
    }

    public static String format(String json) {
        try {
            JsonNode node = mapper.readTree(json);
            return mapper.writerWithDefaultPrettyPrinter().writeValueAsString(node);
        } catch (IOException e) {
            log.error("jackson format json error, json: {}", json, e);
            return json;
        }
    }

    public static boolean isJson(String json) {
        try {
            mapper.readTree(json);
            return true;
        } catch (Exception e) {
            log.error("jackson check json error, json: {}", json, e);
            return false;
        }
    }

    private static InputStream getResourceStream(String name) {
        return JsonUtil.class.getClassLoader().getResourceAsStream(name);
    }

    private static InputStreamReader getResourceReader(InputStream inputStream) {
        if (null == inputStream) {
            return null;
        }
        return new InputStreamReader(inputStream, StandardCharsets.UTF_8);
    }
}

第三步: 创建JsonResult类

package cn.tedu.web.util;

import lombok.Getter;
import lombok.Setter;

@Getter
@Setter
public class JsonResult<T> {
    /** 成功 */
    public static final int SUCCESS = 200;

    /** 没有登录 */
    public static final int NOT_LOGIN = 400;

    /** 发生异常 */
    public static final int EXCEPTION = 401;

    /** 系统错误 */
    public static final int SYS_ERROR = 402;

    /** 参数错误 */
    public static final int PARAMS_ERROR = 403;

    /** 不支持或已经废弃 */
    public static final int NOT_SUPPORTED = 410;

    /** AuthCode错误 */
    public static final int INVALID_AUTHCODE = 444;

    /** 太频繁的调用 */
    public static final int TOO_FREQUENT = 445;

    /** 未知的错误 */
    public static final int UNKNOWN_ERROR = 499;

    private int code;
    private String msg;
    private T data;



    public static JsonResult build() {
        return new JsonResult();
    }
    public static JsonResult build(int code) {
        return new JsonResult().code(code);
    }
    public static JsonResult build(int code, String msg) {
        return new JsonResult<String>().code(code).msg(msg);
    }
    public static <T> JsonResult<T> build(int code, T data) {
        return new JsonResult<T>().code(code).data(data);
    }
    public static <T> JsonResult<T> build(int code, String msg, T data) {
        return new JsonResult<T>().code(code).msg(msg).data(data);
    }

    public JsonResult<T> code(int code) {
        this.code = code;
        return this;
    }
    public JsonResult<T> msg(String msg) {
        this.msg = msg;
        return this;
    }
    public JsonResult<T> data(T data) {
        this.data = data;
        return this;
    }


    public static JsonResult ok() {
        return build(SUCCESS);
    }
    public static JsonResult ok(String msg) {
        return build(SUCCESS, msg);
    }
    public static <T> JsonResult<T> ok(T data) {
        return build(SUCCESS, data);
    }
    public static JsonResult err() {
        return build(EXCEPTION);
    }
    public static JsonResult err(String msg) {
        return build(EXCEPTION, msg);
    }

    @Override
    public String toString() {
        return JsonUtil.to(this);
    }
}

错误说明:

 二 商品模块

第一步:新建spring模块:sp02-itemservice

注意:修改版本

 

第二步:在sp02工程的pom文件添加sp01工程的通用代码

<!--依赖通用项目sp01的代码-->
        <dependency>
            <groupId>cn.tedu</groupId>
            <artifactId>sp01-commons</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>

第三步:编辑配置文件

# 向注册中心注册的名称
spring:
  application:
    name: item-service
#item  8001
#user  8101
#order 8201
server:
  port: 8001

第四步:创建业务层cn.tedu.service包,创建ItemServiceImpl实现类

package cn.tedu.sp02.service;

import cn.tedu.sp01.entity.Item;
import cn.tedu.sp01.service.ItemService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;

import java.util.ArrayList;
import java.util.List;
/**商品业务接口的实现类*/
@Service
@Slf4j
public class ItemServiceImpl implements ItemService {
    @Override
    public List<Item> getItems(String orderId) {
        log.info("获取商品,order="+orderId);
        List<Item> items =new ArrayList<>();
        items.add(new Item(1,"商品1",1));
        items.add(new Item(2,"商品2",5));
        items.add(new Item(3,"商品3",2));
        items.add(new Item(4,"商品4",3));
        items.add(new Item(5,"商品5",1));
        return items;
    }

    @Override
    public void decreaseNumber(List<Item> items) {
         for (Item item : items){
             log.info("减少库存:"+item);
         }
    }
}

第五步: 创建cn.tedu.sp02.controller包,再创建ItemController类

package cn.tedu.sp02.controller;

import cn.tedu.sp01.entity.Item;
import cn.tedu.sp01.service.ItemService;
import cn.tedu.web.util.JsonResult;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.List;

@RestController
@Slf4j
public class ItemController {
    @Autowired
    private ItemService itemService;

    //直接用浏览器访问测试
    @GetMapping("/{orderId}")
    public JsonResult<List<Item>> getItems(
            @PathVariable String orderId){
        List<Item> items = itemService.getItems(orderId);
        return JsonResult.ok().data(items);
    }

    /**/
    //用 postman 测试 post 请求
    @PostMapping("decreaseNumber")
    public JsonResult<?> decreaseNumber(
            @RequestBody List<Item> items){
        itemService.decreaseNumber(items);
        return JsonResult.ok().msg("减少库存成功");
    }
}

第六步:测试

根据orderid，查询商品
http://localhost:8001/35

减少商品库存
http://localhost:8001/decreaseNumber

使用postman，POST发送以下格式数据：
[{"id":1, "name":"abc", "number":23},{"id":2, "name":"def", "number":11}]

三 用户服务模块

 

 第一步:修改pom文件版本

添加sp01模块依赖

<!--sp01通用项目代码依赖-->
        <dependency>
            <groupId>cn.tedu</groupId>
            <artifactId>sp01-commons</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>

 第二步:配置文件添加服务名称和端口号以及自定义用户名

spring:
  application:
    name: user-service
server:
  port: 8101
#三个测试用户数据,Demo数据: 7,8,9三个用户
#自定义的配置属性
sp:
  user-service:
    users: "[{\"id\":7, \"username\":\"abc\",\"password\":\"123\"},
            {\"id\":8, \"username\":\"def\",\"password\":\"456\"},
            {\"id\":9, \"username\":\"ghi\",\"password\":\"789\"}]"

 第三步:创建cn.tedu.sp03.service包下创建UserServiceImpl实现类

package cn.tedu.sp03.service;

import cn.tedu.sp01.entity.User;
import cn.tedu.sp01.service.UserService;
import cn.tedu.web.util.JsonUtil;
import com.fasterxml.jackson.core.type.TypeReference;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
@Slf4j
public class UserServiceImpl implements UserService {

    //注入配置文件中的自定义用户
    @Value("${sp.user-service.users}")
    private String userJson;

    @Override
    public User getUser(Integer userId) {
        //日志获取用户id
        log.info("获取用户,userId="+userId);
        //userJson -->List<User>
        List<User> list = JsonUtil.from(
                userJson, new TypeReference<List<User>>() {});//大括号是匿名内部类,继承父类类型
        for (User u : list){
            if(u.getId().equals(userId)){
                return u;
            }
        }
        return new User(userId,"用户名"+userId,"密码"+userId);
    }

    @Override
    public void addScore(Integer userId, Integer score) {
        //获取用户及用户积分
        log.info("增加用户积分,userId="+userId+",score="+score);


    }
}

第四步:创建cn.tedu.sp03.controller包,创建UserController类

package cn.tedu.sp03.controller;

import cn.tedu.sp01.entity.User;
import cn.tedu.sp01.service.UserService;
import cn.tedu.web.util.JsonResult;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;

@RestController
@Slf4j
public class UserController {

    @Autowired
    private UserService userService;

    @GetMapping("/{userId}")
    public JsonResult<User> getUser(
            @PathVariable Integer userId) {
        User user = userService.getUser(userId);
        return JsonResult.ok().data(user);
    }

    // /8/score?score=1000
    @GetMapping("/{userId}/score")
    public JsonResult<?> addScore(
            @PathVariable Integer userId,
            Integer score){ //提交参数和变量名一致,就不使用@RequestParam("score"),不一致就是要该注解指定
        userService.addScore(userId,score);
        return JsonResult.ok().msg("增加积分成功");
    }
}

第五步:测试

根据userid查询用户信息
http://localhost:8101/7

根据userid，为用户增加积分
http://localhost:8101/7/score?score=100

四 订单模块

 

第一步:pom.xml文件修改,添加sp01通用代码依赖

 

 第二步:配置文件修改为.yml后缀,编辑配置文件内容

#yml文件中如果写中文注释,右下角必须是UTF-8,不能是GBK
spring:
  application:
    name: order-service

server:
  port: 8201

第三步:cn.tedu.sp04创建service包,创建OrderServiceImpl实现类

package cn.tedu.sp04.service;

import cn.tedu.sp01.entity.Order;
import cn.tedu.sp01.service.OrderService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;

@Service
@Slf4j
public class OrderServiceImpl implements OrderService {
    @Override
    public Order getOrder(String orderId) {
        log.info("获取订单,orderId="+orderId);
        // TODO: 远程调用商品,获取商品列表
        // TODO: 远程调用用户,获取用户数据
        //等添加nacos服务注册中心时再修改
        Order order = new Order();
        order.setId(orderId);
//        order.setUser(用户数据);
//        order.setItems(商品列表);
        return order;
    }

    /*添加订单*/
    @Override
    public void addOrder(Order order) {
        //目前只做一个日志,后期会添加数据库
        log.info("添加订单:"+ order);
        // TODO: 远程调用商品,减少库存
        // TODO: 远程调用用户,增加积分
    }
}

第四步:创建cn.tedu.sp04.controller包,创建OrderController类

package cn.tedu.sp04.controller;

import cn.tedu.sp01.entity.Item;
import cn.tedu.sp01.entity.Order;
import cn.tedu.sp01.entity.User;
import cn.tedu.sp01.service.OrderService;
import cn.tedu.web.util.JsonResult;
import com.sun.org.apache.xpath.internal.operations.Or;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;

import java.util.Arrays;

@RestController
@Slf4j
public class OrderController {

    @Autowired
    private OrderService orderService;

    //获取订单
    @GetMapping("/{orderId}")
    public JsonResult<Order> getOrder(@PathVariable String orderId){
        Order order = orderService.getOrder(orderId);
        return JsonResult.ok().data(order);
    }
    //增加订单
    @GetMapping("/add")
    public JsonResult<?> add(){//泛型?代表没有条件,加不加都不影响
        Order order = new Order();
        order.setId("123");
        order.setUser(new User(8,null,null));
        order.setItems(Arrays.asList(new Item[]{
                new Item(1,"商品1",1),
                new Item(2,"商品2",5),
                new Item(3,"商品3",2),
                new Item(4,"商品4",3),
                new Item(5,"商品5",1),
        }));
        orderService.addOrder(order);
        return JsonResult.ok();
    }
}

第五步:测试:

根据orderid，获取订单
http://localhost:8201/123abc

保存订单，观察控制台日志输出
http://localhost:8201/add