idea实现快速根据表创建实体

Posted 2021-03-22 wang66a

第一步使用idea连上数据库

第二步选择需要创建实体的表

选择这个创建的实体是没有注解的

需要注解的话需要在

创建这样一个文件

文件的内容

import com.intellij.database.model.DasTable
import com.intellij.database.model.ObjectKind
import com.intellij.database.util.Case
import com.intellij.database.util.DasUtil
import java.io.*
import java.text.SimpleDateFormat
 
/*
 * Available context bindings:
 *   SELECTION   Iterable<DasObject>
 *   PROJECT     project
 *   FILES       files helper
 */
packageName = ""
typeMapping = [
        (~/(?i)tinyint|smallint|mediumint/)      : "Integer",
        (~/(?i)int/)                             : "Long",
        (~/(?i)bool|bit/)                        : "Boolean",
        (~/(?i)float|double|decimal|real/)       : "Double",
        (~/(?i)datetime|timestamp|date|time/)    : "Date",
        (~/(?i)blob|binary|bfile|clob|raw|image/): "InputStream",
        (~/(?i)/)                                : "String"
]
 
 
FILES.chooseDirectoryAndSave("Choose directory", "Choose where to store generated files") { dir ->
    SELECTION.filter { it instanceof DasTable && it.getKind() == ObjectKind.TABLE }.each { generate(it, dir) }
}
 
def generate(table, dir) {
    def className = javaName(table.getName(), true)
    def fields = calcFields(table)
    packageName = getPackageName(dir)
    PrintWriter printWriter = new PrintWriter(new OutputStreamWriter(new FileOutputStream(new File(dir, className + ".java")), "UTF-8"))
    printWriter.withPrintWriter {out -> generate(out, className, fields,table)}
 
//    new File(dir, className + ".java").withPrintWriter { out -> generate(out, className, fields,table) }
}
 
// 获取包所在文件夹路径
def getPackageName(dir) {
    return dir.toString().replaceAll("\", ".").replaceAll("/", ".").replaceAll("^.*src(.main.java.)?", "") + ";"
}
 
def generate(out, className, fields,table) {
    out.println "package $packageName"
    out.println ""
    out.println "import javax.persistence.Column;"
    out.println "import javax.persistence.Entity;"
    out.println "import javax.persistence.Table;"
    out.println "import java.io.Serializable;"
    out.println "import lombok.Getter;"
    out.println "import lombok.Setter;"
    out.println "import lombok.ToString;"
    Set types = new HashSet()
 
    fields.each() {
        types.add(it.type)
    }
 
    if (types.contains("Date")) {
        out.println "import java.util.Date;"
    }
 
    if (types.contains("InputStream")) {
        out.println "import java.io.InputStream;"
    }
    out.println ""
    out.println "/**
" +
            " * @Description  
" +
            " * @Author  Hunter
" +
            " * @Date "+ new SimpleDateFormat("yyyy-MM-dd").format(new Date()) + " 
" +
            " */"
    out.println ""
    out.println "@Setter"
    out.println "@Getter"
    out.println "@ToString"
    out.println "@Entity"
    out.println "@Table ( name =""+table.getName() +"" )"
    out.println "public class $className  implements Serializable {"
    out.println ""
    out.println genSerialID()
    fields.each() {
        out.println ""
        // 输出注释
        if (isNotEmpty(it.commoent)) {
            out.println "	/**"
            out.println "	 * ${it.commoent.toString()}"
            out.println "	 */"
        }
 
        if (it.annos != "") out.println "   ${it.annos.replace("[@Id]", "")}"
 
        // 输出成员变量
        out.println "	private ${it.type} ${it.name};"
    }
 
    // 输出get/set方法
//    fields.each() {
//        out.println ""
//        out.println "	public ${it.type} get${it.name.capitalize()}() {"
//        out.println "		return this.${it.name};"
//        out.println "	}"
//        out.println ""
//
//        out.println "	public void set${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
        def comm =[
                colName : col.getName(),
                name :  javaName(col.getName(), false),
                type : typeStr,
                commoent: col.getComment(),
                annos: "	@Column(name = ""+col.getName()+"" )"]
        if("id".equals(Case.LOWER.apply(col.getName())))
            comm.annos +=["@Id"]
        fields += [comm]
    }
}
 
// 处理类名（这里是因为我的表都是以t_命名的，所以需要处理去掉生成类名时的开头的T，
// 如果你不需要那么请查找用到了 javaName这个方法的地方修改为 javaName 即可）
/*def javaClassName(str, capitalize) {
    def s = com.intellij.psi.codeStyle.NameUtil.splitNameIntoWords(str)
            .collect { Case.LOWER.apply(it).capitalize() }
            .join("")
            .replaceAll(/[^p{javaJavaIdentifierPart}[_]]/, "_")
    // 去除开头的T  http://developer.51cto.com/art/200906/129168.htm
    s = s[1..s.size() - 1]
    capitalize || s.length() == 1? s : Case.LOWER.apply(s[0]) + s[1..-1]
}*/
 
def javaName(str, capitalize) {
//    def s = str.split(/(?<=[^p{IsLetter}])/).collect { Case.LOWER.apply(it).capitalize() }
//            .join("").replaceAll(/[^p{javaJavaIdentifierPart}]/, "_")
//    capitalize || s.length() == 1? s : Case.LOWER.apply(s[0]) + s[1..-1]
    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]
}
 
def isNotEmpty(content) {
    return content != null && content.toString().trim().length() > 0
}
 
static String changeStyle(String str, boolean toCamel){
    if(!str || str.size() <= 1)
        return str
 
    if(toCamel){
        String r = str.toLowerCase().split(‘_‘).collect{cc -> Case.LOWER.apply(cc).capitalize()}.join(‘‘)
        return r[0].toLowerCase() + r[1..-1]
    }else{
        str = str[0].toLowerCase() + str[1..-1]
        return str.collect{cc -> ((char)cc).isUpperCase() ? ‘_‘ + cc.toLowerCase() : cc}.join(‘‘)
    }
}
 
static String genSerialID()
{
    return "	private static final long serialVersionUID =  "+Math.abs(new Random().nextLong())+"L;"
}

然后选择表，选择自己定义的groovy文件即可

当然需要在pom文件中添加

 <dependency>
            <groupId>javax.persistence</groupId>
            <artifactId>persistence-api</artifactId>
            <version>1.0.2</version>
        </dependency>

        <!-- set,get注解实现-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.10</version>
            <scope>provided</scope>
        </dependency>

支持注解