Spring Boot 微服务极简化开发

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阿奔（讨论 | 贡献）2024年10月24日 (四) 14:49的版本 （→‎index.html）
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使用 sprint Boot 框架，结合自定义类，实现 webservice 极简化开发。

Setup

Project Setting

Modules
 Source Folders: src/main/java
 Resource Folders: src/main/resources
 Test Source Folders: src/test/java
 Test Resource Folders: src/test/resources
 Excluded Folders: target

pom

<!-- spring-boot -->
<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>3.3.2</version>
    <relativePath/>
</parent>

<dependencies>
    <!-- spring-boot -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-thymeleaf</artifactId>
    </dependency>
    <!--log4j-->
    <dependency>
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
        <version>1.2.17</version>
    </dependency>
    <!--slf4j-->
    <!-- Conflicts with spring boot 
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-log4j12</artifactId>
        <version>${slf4j.version}</version>
    </dependency>
    -->
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-api</artifactId>
        <version>2.0.9</version>
    </dependency>
    <!--Json-->
    <dependency>
        <groupId>com.google.code.gson</groupId>
        <artifactId>gson</artifactId>
        <version>2.8.9</version>
    </dependency>
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>fastjson</artifactId>
        <version>1.2.28</version>
    </dependency>
    <!--h2-->
    <dependency>
        <groupId>com.h2database</groupId>
        <artifactId>h2</artifactId>
        <version>2.1.212</version>
    </dependency>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</dependencies>

application.yaml

src/main/resources 

spring.application.name:
  SprintBootDemo
spring.profiles.active:
  production
server:
  port: 8080
spring.thymeleaf:
  mode: HTML
  cache: false
  encoding: UTF-8
  enabled: true
  prefix: classpath:/templates/
  suffix: .html

index.html

src/main/resources/static // 更改需重启 

<html>
  <p>This webservice is running...</p>
</html>

com.udef

BASE/CNFYAML/DB/SQLData

etc

log4j.properties/sysdb.yaml/db.yaml

config

sql1.yaml   // 更改不需重启

Service

src/main/java/SprintBoot/SprintBootStart.java 

package SprintBoot;

import com.udf.SQLData;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class SprintBootStart {
    public static SQLData[] sql = new SQLData[10];

    public SprintBootStart() {
        sql[0] = new SQLData("h2local", "db.yaml");
    }

    public static void main(String[] args) {
        SpringApplication.run(SprintBootStart.class, args);
    }
}

src/main/java/SprintBoot/sql1/sql1.java 

package SprintBoot;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

import java.util.LinkedHashMap;
import java.util.Map;

import com.udf.SQLData;

import static SprintBoot.SprintBootStart.sql;

@RestController
@RequestMapping("/sql")
public class sql1 {
    String appName;

    public sql1() {
        appName = "sql";
    }

    @RequestMapping(value = "/get1", method = RequestMethod.GET)
    public Map<String, Object> getTest1() {
        //BASE.UDEFLOG = "ALL";
        SQLData sql1 = sql[0];
        sql1.setSQLYaml("config/sql1.yaml");

        Map<String, String> m1 = new LinkedHashMap<>();

        // get data
        m1.put("api", "SE_PROD");
        m1.put("where.status", "1");
        m1.put("where.ca", "in ('LRL', 'adam')");

        return sql1.SQL(m1);
    }
}

运行调试没问题的话，就可以打 jar 包了。

package

set main class

src/main/resources/META-INF/MANIFEST.MF 

Manifest-Version: 1.0
Main-Class: SprintBoot.SprintBootStart

maven build

maven -> XXX —> Lifecycle -> package -> build

RUN

java -jar XXX.jar

Error

Artifact

Project Structure -> Artifact
Build Artifact
java -jar XXX.jar
-> Error: No active profile set, falling back to 1 default profile: "default"

Solution: maven package

没有主清单属性

1. pom 中未引入 spring-boot-maven-plugin
2. MANIFEST.MF 中启动类设置错误(若只有一个 main，倒也无妨)
3. MF 文件也可通过 Project Setting/Artifacts 生成

找不到或无法加载主类

// 明明有，但是却无法 run/debug
reload all maven
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