使用idea自帶插件自動生成pojo類

參考連結：https://blog.csdn.net/u012040909/article/details/89030840

這位大佬是使用了Lombok注解的，沒有getset方方法。

下面是我的Generate POJOs.groovy代碼

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

import java.time.LocalDate

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

// 此處指定包路徑，路徑需要自行維護;
packageName = "com.xxx.xxx.user.po;"
// 此處指定對應的類型映射，可按需修改，目前tinyint如果要映射到自定義枚舉類型，隻能手動修改
typeMapping = [
        (~/(?i)bigint/)                   : "Long",
        (~/(?i)int/)                      : "Integer",
        (~/(?i)NUMBER/)                   : "Integer",
        (~/(?i)tinyint/)                  : "Boolean",
        (~/(?i)float|double|decimal|real/): "BigDecimal",
        (~/(?i)time|datetime|timestamp/)  : "Date",
        (~/(?i)date/)                     : "Date",
        (~/(?i)/)                         : "String"
]

// 上面用到類和它的導入路徑的之間的映射
importMap = [
        "BigDecimal"   : "java.math.BigDecimal",
        "LocalDate"    : "java.time.LocalDate",
        "LocalDateTime": "java.time.LocalDateTime",
        "Date"         : "java.util.Date",
]

// 導入路徑清單，下面引用的時候會去重，也可以直接聲明成一個 HashSet
importList = []

// 彈出選擇檔案的對話框
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)
    //由于表名是T_開頭的，這裡截取掉
    className = className[1..-1]
    def writer = new PrintWriter(new OutputStreamWriter(new FileOutputStream(new File(dir, className + ".java")), "utf-8"))
    def fields = calcFields(table)
    writer.withPrintWriter { out -> generate(out, className, fields, table) }
}

// 從這裡開始，拼實體類的具體邏輯代碼
def generate(out, className, fields, table) {
    out.println "package $packageName"
    out.println ""
    out.println ""
    // 引入所需的包
    out.println "import java.io.Serializable;"
    out.println "import javax.persistence.Id;"
    out.println "import javax.persistence.Table;"
    out.println "import tk.mybatis.mapper.annotation.KeySql;"
    out.println "import com.hfocean.hwyg.common.mapper.ObjectGenId;"
    out.println "import javax.persistence.Column;"
    // 去重後導入清單
    importList.unique().each() { pkg ->
        out.println "import " + pkg + ";"
    }
    out.println ""
    // 添加類注釋
    out.println "/**"
    // 如果添加了表注釋，會加到類注釋上
    if (isNotEmpty(table.getComment())) {
        out.println " * " + table.getComment()
    }
    out.println " *"
    out.println " * @author zhuliang"
    out.println " * @date " + LocalDate.now()
    out.println " */"
    // 添加類注解
    out.println "@Table(name = \"${table.getName()}\")"
    out.println "public class $className implements Serializable {"
    out.println ""
    boolean isId = true
    //序列化id
    def random = new Random();
    out.println "\tprivate static final long serialVersionUID = "+random.nextLong()+"L;"
    // 周遊字段，按下面的規則生成
    fields.each() {
        // 輸出注釋
        if (isNotEmpty(it.comment)) {
            out.println "\t/**"
            out.println "\t * ${it.comment}"
            out.println "\t */"
        }
        // 這邊預設第一個字段為主鍵，實際情況大多數如此，遇到特殊情況可能需要手動修改
        if (isId) {
            out.println "\[email protected]"
            out.println "\[email protected](genId = ObjectGenId.class)"
            isId = false
        }
        //添加@Column注解
        out.println "\[email protected](name = \"${it.cName}\")"
        out.println "\tprivate ${it.type} ${it.name};"
        out.println ""
    }
    // 周遊字段，生成getter setter
    fields.each() {
        //getter setter
        out.println ""
        out.println "\tpublic ${it.type} get${it.name.capitalize()}() {"
        out.println "\t\treturn ${it.name};"
        out.println "\t}"
        out.println ""
        out.println "\tpublic void set${it.name.capitalize()}(${it.type} ${it.name}) {"
        out.println "\t\tthis.${it.name} = ${it.name};"
        out.println "\t}"
        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
        // 如果是需要導入的類型，則往list裡面添加
        if (importMap.containsKey(typeStr)) {
            importList.add(importMap.get(typeStr))
        }
        fields += [[
                           name   : javaName(col.getName(), false),
                           cName   : col.getName(),
                           type   : typeStr,
                           dbType : col.getDataType(),
                           comment: col.getComment()
                   ]]
    }
}

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]
}