Idea 根据表生成实体类

最新推荐文章于 2025-07-01 15:22:50 发布

转载最新推荐文章于 2025-07-01 15:22:50 发布 · 232 阅读

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原文链接：http://www.cnblogs.com/whm-blog/p/10971945.html

文章标签：

#开发工具 #java #数据库

本文介绍了一种使用IntelliJ IDEA自动生成Java实体类的方法，通过脚本解析数据库表结构并映射到Java类型，适用于快速开发阶段。文章详细展示了如何配置类型映射和文件生成流程。

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来源: https://blog.youkuaiyun.com/lp2388163/article/details/86480480

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import com.intellij.database.model.DasTable
import com.intellij.database.util.Case
import com.intellij.database.util.DasUtil

/*
 * Available context bindings:
 *   SELECTION   Iterable<DasObject>
 *   PROJECT     project
 *   FILES       files helper
 */

packageName = "com.sample;"
typeMapping = [
        (~/(?i)bigint/)                   : "Long",
        (~/(?i)int/)                      : "Integer",
        (~/(?i)float|double|decimal|real/): "Double",
        (~/(?i)datetime|timestamp/)       : "java.util.Date",
        (~/(?i)time/)                     : "java.util.Date",
        (~/(?i)date/)                     : "java.sql.Date",
        //(~/(?i)time/)                     : "java.sql.Time",
        (~/(?i)/)                         : "String"
]

FILES.chooseDirectoryAndSave("Choose directory", "Choose where to store generated files") { dir ->
    SELECTION.filter { it instanceof DasTable }.each { generate(it, dir) }
}


def generate(table, dir) {
    def className = javaName(table.getName(), true)
    def fields = calcFields(table)
    new PrintWriter(new OutputStreamWriter(new FileOutputStream( new File(dir, className + ".java")), "utf-8")).withPrintWriter { out -> generate(out, className, fields) }
}


def generate(out, className, fields) {
    out.println "package $packageName"
    out.println ""
    out.println ""
    out.println "public class $className {"
    out.println ""
    fields.each() {

        if (isNotEmpty(it.commoent)) {
            out.println "\t/**"
            out.println "\t * ${it.commoent}"
            out.println "\t */"
        }


        if (it.annos != "") out.println "  ${it.annos}"
        out.println "  private ${it.type} ${it.name};"
    }
    out.println ""
    // 注释掉 set get 方法
    /*fields.each() {
        out.println ""
        out.println "  public ${it.type} get${it.name.capitalize()}() {"
        out.println "    return ${it.name};"
        out.println "  }"
        out.println ""
        out.println "  public void set${it.name.capitalize()}(${it.type} ${it.name}) {"
        out.println "    this.${it.name} = ${it.name};"
        out.println "  }"
        out.println ""
    }*/
    out.println "}"
}

def calcFields(table) {
    DasUtil.getColumns(table).reduce([]) { fields, col ->
        def spec = Case.LOWER.apply(col.getDataType().getSpecification())
        def typeStr = typeMapping.find { p, t -> p.matcher(spec).find() }.value
        fields += [[
                           name    : javaName(col.getName(), false),
                           type    : typeStr,
                           commoent: col.getComment(),
                           annos   : ""]]
    }
}

def javaName(str, capitalize) {
    /*def s = com.intellij.psi.codeStyle.NameUtil.splitNameIntoWords(str)
            .collect { Case.LOWER.apply(it).capitalize() }
            .join("")
            .replaceAll(/[^\p{javaJavaIdentifierPart}[_]]/, "_")
    capitalize || s.length() == 1 ? s : Case.LOWER.apply(s[0]) + s[1..-1]*/
    return str
}

def isNotEmpty(content) {
    return content != null && content.toString().trim().length() > 0
}