IDEA如何从数据库表生成带字段注释的Model，解决乱码问题，还有自动生成controller问题

写在前面

刚开始也从网上找了很多，但都不好用，注释，注解什么的都不太好，后来参照几个对应修改的

关于IDEA连接数据库的问题，参考一下，这个,这里主要是对之前的Groovy文件优化，解决乱码，调整出自己需要的生成脚本

一、生成Model

//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 com.google.common.base.CaseFormat
import com.intellij.database.model.DasObject
import com.intellij.database.model.DasTable
import com.intellij.database.model.ObjectKind
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.time.LocalDateTime",
        (~/(?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 && it.getKind() == ObjectKind.TABLE }.each { generate(it, dir) }
}

def generate(table, dir) {
  def className = javaName(table.getName(), true)
  def fields = calcFields(table)
  new File(dir, className.replace('_', '') + ".java").withPrintWriter('UTF-8') { out -> generate(out, className, fields) }
}

def generate(out, className, fields) {
  out.println "package $packageName"
  out.println ""
  out.println ""
  out.println "import lombok.Getter;"
  out.println "import lombok.Setter;"
  out.println "import javax.persistence.*;"
//  out.println "import java.sql.Timestamp;"
  out.println ""
  out.println "@Entity"
  out.println "@Table(name = \"${className.toLowerCase()}\")"
  out.println "@Setter @Getter"

  out.println "public class ${className.replace('_', '')} implements Serializable {"
  out.println ""
  out.println genSerialId()
  out.println ""
  fields.each() {

    // 字段注释
//    if (it.commoent != "" && it.commoent!="null")out.println "  // ${it.commoent}"

    if (it.annos != "") out.println "  ${it.annos}"

    if (it.name == 'id') {
      out.println "  @Id"
      out.println "  @GeneratedValue(strategy = GenerationType.AUTO)"
    }
    if (it.name.contains('_'))
      out.println "  @Column(name = \"${it.name.toLowerCase()}\")"
    out.println "  private ${it.type} ${it.name.replace('_', '')};"
    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,
                       annos: ""]]
  }
}

def calcFields(DasObject table) {
  DasUtil.getColumns(table).reduce([]) { fields, col ->
    def spec = Case.LOWER.apply(col.dataType.specification)
    def typeStr = typeMapping.find { p, t -> p.matcher(spec).find() }.value
    fields += [[
                       name : javaName(col.name, false),
                       type : typeStr,
                       annos: """
    /**
     * $col.comment
     */"""]]
  }
}



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]
}

static String genSerialId(){
  return "\tprivate static final long serialVersionUID = " + Math.abs(new Random().nextLong()) + "L";
}

二、生成Controller

import com.intellij.database.model.DasTable
import com.intellij.database.model.ObjectKind
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)int/)                      : "long",
        (~/(?i)float|double|decimal|real/): "double",
        (~/(?i)datetime|timestamp/)       : "java.sql.Timestamp",
        (~/(?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 && it.getKind() == ObjectKind.TABLE }.each { generate(it, dir) }
}

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

def generate(out, className, fields, tableName) {

    def camelClassName = Case.LOWER.apply(className.substring(0,1)) + className.substring(1)

    out.println "package $packageName"
    out.println ""
    out.println "import org.springframework.http.ResponseEntity;"
    out.println "import org.springframework.web.bind.annotation.*;"
    out.println ""
    out.println "@RestController"
    out.println "@RequestMapping(\"/${Case.LOWER.apply(className)}\")"
    out.println "public class ${underscoreToCamelCase(className)}Controller extends BaseController {"
    out.println ""
    out.println "  private ${underscoreToCamelCase(className)}Service ${camelClassName}Service;"
    out.println ""
    out.println "  public ${underscoreToCamelCase(className)}Controller(${underscoreToCamelCase(className)}Service service) {"
    out.println "    this.${camelClassName}Service = service;"
    out.println "  }"
    out.println ""
    out.println "  @RequestMapping(method = RequestMethod.GET)"
    out.println "  public ResponseEntity<Iterable<${underscoreToCamelCase(className)}Model>> findAll() {"
    out.println "    Iterable<${underscoreToCamelCase(className)}Model> all${className} = this.${camelClassName}Service.findall(0, 100);"
    out.println "    return Ok(all${className});"
    out.println "  }"
    out.println ""
    out.println "  @RequestMapping(value = \"/{page}/{pageSize}\", method = RequestMethod.GET)"
    out.println "  public ResponseEntity<Iterable<${underscoreToCamelCase(className)}Model>> findAll(@PathVariable(\"page\") final Integer page, @PathVariable(\"pageSize\") final Integer pageSize) {"
    out.println "    Iterable<${underscoreToCamelCase(className)}Model> all${className} = this.${camelClassName}Service.findall(page, pageSize);"
    out.println "    return Ok(all${className});"
    out.println "  }"
    out.println ""
    out.println "  @RequestMapping(value = \"/{id}\", method = RequestMethod.GET)"
    out.println "  public ResponseEntity<${underscoreToCamelCase(className)}Model> get(@PathVariable(\"id\") final Long id) {"
    out.println "    ${underscoreToCamelCase(className)}Model entry = this.${camelClassName}Service.find(id);"
    out.println "    return Ok(entry);"
    out.println "  }"
    out.println ""
    out.println "  @RequestMapping(method = RequestMethod.POST)"
    out.println "  public ResponseEntity<${underscoreToCamelCase(className)}Model> create(@RequestBody final ${underscoreToCamelCase(className)}Model creating) {"
    out.println "    ${underscoreToCamelCase(className)}Model created = this.${camelClassName}Service.create(creating);"
    out.println "    return Ok(created);"
    out.println "  }"
    out.println ""
    out.println "  @RequestMapping(method = RequestMethod.PUT)"
    out.println "  public ResponseEntity<${underscoreToCamelCase(className)}Model> update(@RequestBody final ${underscoreToCamelCase(className)}Model updating) {"
    out.println "    ${underscoreToCamelCase(className)}Model updated = this.${camelClassName}Service.update(updating);"
    out.println "    return Ok(updated);"
    out.println "  }"
    out.println ""
    out.println "  @RequestMapping(value = \"/{id}\", method = RequestMethod.DELETE)"
    out.println "  public ResponseEntity delete(@PathVariable(\"id\") final Long id) {"
    out.println "    this.${camelClassName}Service.delete(id);"
    out.println "    return Ok();"
    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,
                           annos: "",
                           colName: col.getName(),
                           primary: DasUtil.isPrimary(col)
                   ]]
    }
}

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]
}

String underscoreToCamelCase(String underscore){
    if(!underscore || underscore.isAllWhitespace()){
        return ''
    }
    return underscore.replaceAll(/_\w/){ it[1].toUpperCase() }
}