学习springcloud时遇到java: 找不到符号 符号: 方法 getPname()

2023-12-13 04:10:37

学习springcloud时异常-java: 找不到符号 符号: 方法 getPname()

学习springcloud时,遇到获取实体类属性值时出现异常。

项目目前分为两个子模块,一个是实体类模块,另一个是应用层。
在查询数据后,打印pname属性时报错,代码排查一遍没有问题。

问题最后定位在pom.xml文件的打包方式。
实体类的子模块,采用的打包方式是pom方式,导致出现了问题;修改为jar或war方式就正常了

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源码

父项目

pom.xml

<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/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>org.example</groupId>
  <artifactId>springcloud2</artifactId>
  <packaging>pom</packaging>
  <version>1.0-SNAPSHOT</version>


  <modules>
    <module>product-domain</module>
    <module>product-server</module>
  </modules>


  <name>springcloud2 Maven Webapp</name>
  <url>http://maven.apache.org</url>

  <parent>
    <artifactId>spring-boot-starter-parent</artifactId>
    <groupId>org.springframework.boot</groupId>
    <version>2.3.2.RELEASE</version>
  </parent>

  <properties>
    <java.version>1.8</java.version>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <spring-cloud.version>Hoxton.SR8</spring-cloud.version>
    <spring-cloud-alibaba.version>2.2.5.RELEASE</spring-cloud-alibaba.version>
  </properties>

  <dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-dependencies</artifactId>
        <version>${spring-cloud.version}</version>
        <scope>import</scope>
        <type>pom</type>
      </dependency>
      <dependency>
        <groupId>com.alibaba.cloud</groupId>
        <artifactId>spring-cloud-alibaba-dependencies</artifactId>
        <version>${spring-cloud-alibaba.version}</version>
        <scope>import</scope>
        <type>pom</type>
      </dependency>
    </dependencies>
  </dependencyManagement>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
  </dependencies>

  <build>
    <finalName>springcloud2</finalName>
  </build>


</project>

实体类模块

pom.xml

<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/maven-v4_0_0.xsd">
    <parent>
        <artifactId>springcloud2</artifactId>
        <groupId>org.example</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>

    <modelVersion>4.0.0</modelVersion>
    <artifactId>product-domain</artifactId>
    <packaging>jar</packaging>
    <name>product-domain Maven Webapp</name>
    <url>http://maven.apache.org</url>


    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <finalName>product-domain</finalName>
    </build>

</project>

package cn.wolfcode.domain.entity;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;


import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;

@Data
@Entity(name = "t_shop_product")
@NoArgsConstructor
@AllArgsConstructor
public class Product {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long pid;
    private String pname;
    private Double pprice;
    private Integer stock;

}

应用层模块

pom.xml

<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/maven-v4_0_0.xsd">
    <parent>
        <artifactId>springcloud2</artifactId>
        <groupId>org.example</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>

    <modelVersion>4.0.0</modelVersion>
    <artifactId>product-server</artifactId>
    <packaging>jar</packaging>

    <name>product-server Maven Webapp</name>
    <url>http://maven.apache.org</url>

    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.83</version>
        </dependency>
        <dependency>
            <groupId>org.example</groupId>
            <artifactId>product-domain</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
    </dependencies>
    <build>
        <finalName>product-server</finalName>
    </build>
</project>

ProductController

package cn.wolfcode.domain.controller;

import cn.wolfcode.domain.entity.Product;
import cn.wolfcode.domain.service.ProductService;
import com.alibaba.fastjson.JSON;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

@RestController
@Slf4j
public class ProductController {

    @Autowired
    private ProductService productService;

    @RequestMapping(value = "/product/{pid}",method = RequestMethod.GET)
    public Product findByPid(@PathVariable("pid") Long pid){
        log.info("接下来要进行{}号商品信息的查询",pid);
        Product product = productService.findByPid(pid);
        System.out.println(product.getPname());
        log.info("商品信息查询成功,内容为{}", JSON.toJSONString(product));
        return product;
    }

}

ProductDao

package cn.wolfcode.domain.dao;

import cn.wolfcode.domain.entity.Product;
import org.springframework.data.jpa.repository.JpaRepository;

public interface ProductDao extends JpaRepository<Product,Long> {
}

ProductService

package cn.wolfcode.domain.service;

import cn.wolfcode.domain.entity.Product;

public interface ProductService {
    Product findByPid(Long pid);
}

ProductServiceImpl

package cn.wolfcode.domain.service.impl;

import cn.wolfcode.domain.dao.ProductDao;
import cn.wolfcode.domain.entity.Product;
import cn.wolfcode.domain.service.ProductService;
import com.alibaba.fastjson.JSON;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.Optional;

@Service
public class ProductServiceImpl implements ProductService {

    @Autowired
    private ProductDao productDao;



    @Override
    public Product findByPid(Long pid) {
        Optional<Product> byId = productDao.findById(pid);
        Product product = null;
        if (byId!=null && byId.isPresent()){
            System.out.println(pid);

            System.out.println(1111111111);
            product = byId.get();
            System.out.println(JSON.toJSONString(product));
        }else{
            System.out.println(222222222);
        }

        return product;
    }
}

文章来源:https://blog.csdn.net/weixin_46107120/article/details/134813954
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