数据库存List<Integer> a数组,Entity是String a,Dto是List<Integer> a

若需要返回给前端数组数据请按下面方法:

解析返回List数组
List<Integer> aList=new ArrayList<>();
if (StringUtils.isEmpty(aIdStr)){

}else {
    String[] split = aIdStr.split(",");
    for (String s : split) {
        try{
            int i = Integer.parseInt(s);
            aList.add(i);
        } catch (Exception e){
            e.printStackTrace();
            continue;
        }
    }

}

前端发送数据存储库中//数组[1,2]-格式

储存
String reasonIdStr="";
if (CollectionUtils.isEmpty(appealDTO.getReasonId())){

}else {
    List<Integer> reasonId = appealDTO.getReasonId();
    for (int i = 0; i < reasonId.size(); i++) {
        if (i==reasonId.size()-1){
            reasonIdStr+=reasonId.get(i);
        }else {
            reasonIdStr+=reasonId.get(i)+",";
        }
    }
}

*个人编写遇到的问题解决方式,如有更好请评论,谢谢

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.example</groupId> <artifactId>demo5</artifactId> <version>0.0.1-SNAPSHOT</version> <name>demo5</name> <description>demo5</description> <properties> <java.version>1.8</java.version> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <spring-boot.version>2.6.13</spring-boot.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> <version>2.6.13</version> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>com.vaadin.external.google</groupId> <artifactId>android-json</artifactId> <version>0.0.20131108.vaadin1</version> <scope>compile</scope> </dependency> <dependency> <groupId>net.minidev</groupId> <artifactId>json-smart</artifactId> </dependency> </dependencies> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-dependencies</artifactId> <version>${spring-boot.version}</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>3.8.1</version> <configuration> <source>1.8</source> <target>1.8</target> <encoding>UTF-8</encoding> </configuration> </plugin> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <version>${spring-boot.version}</version> <configuration> <mainClass>com.example.demo.Demo5Application</mainClass> <skip>true</skip> </configuration> <executions> <execution> <id>repackage</id> <goals> <goal>repackage</goal> </goals> </execution> </executions> </plugin> </plugins> </build> </project> 我的依赖是这些想写一个想写一个完成前端数字上传到后端,后端返回相加值的功能
最新发布
03-08
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