import com.intellij.database.model.DasTable
import com.intellij.database.util.Case
import com.intellij.database.util.DasUtil
packageName = "cn.lijin.entity;" // 此处指定包路径，也就对应实体类中的package cn.lijin.entity;
typeMapping = [ // 此处指定对应的类型映射，如下：数据库中bigint对应生成java的Long，int|tinyint生成Integer...
(~/(?i)bigint/) : "Long",
(~/(?i)int|tinyint/) : "Integer",
(~/(?i)float|double|decimal|real/) : "java.math.BigDecimal",
(~/(?i)date|datetime|timestamp/) : "java.util.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) { // 从这里开始，拼实体类的具体逻辑代码
out.println "package $packageName"
out.println ""
out.println "import lombok.Data;" // 因为我使用了lombok插件，使用到了Data注解，所以在引包时加了这一行
out.println "import java.io.Serializable;"
out.println ""
out.println "@Data"
out.println "public class $className implements Serializable {"
out.println ""
out.println genSerialID()
out.println ""
int i = 0
fields.each() { // 遍历字段，按下面的规则生成
// 输出注释
if (isNotEmpty(it.commoent)) {
out.println "\t/**"
out.println "\t * ${it.commoent}"
out.println "\t */"
}
if (it.annos != "") out.println " ${it.annos}"
out.println "\tprivate ${it.type} ${it.name};"
out.println ""
i++
}
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 isNotEmpty(content) {
return content != null && content.toString().trim().length() > 0
}
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]
}
//生成序列化的serialVersionUID
static String genSerialID() {
return "\tprivate static final long serialVersionUID = " + Math.abs(new Random().nextLong()) + "L;"
}
