IDEA怎么从数据库表映射Model,一键生成还有Mybatis的逆向工程

冷不防 2021-10-18 21:11 464阅读 0赞

## 一、只生成Model,需两步 ##

### 第一步，连接数据库 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyMTA1NjI5_size_16_color_FFFFFF_t_70]  
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### 第二步，选中多个，和生成目录，单击即可 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyMTA1NjI5_size_16_color_FFFFFF_t_70 2]

#### 其实是基于，先自动生成 .groovy文件，再根据文件配置，生成你想要的映射Model，.groovy文件可修改 ####

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)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 }.each { generate(it, dir) }
    }
    
    def generate(table, dir) {
      def className = javaName(table.getName(), true)
      def fields = calcFields(table)
      new File(dir, className + ".java").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 (it.annos != "") out.println "  ${it.annos}"
        out.println "  private ${it.type} ${it.name};"
      }
      out.println ""
      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,
                     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]
    }

如果对groovy语言不熟悉，配置不出你所希望的Model样子，可以先生成Model（带set,get方法的），再稍微修改即可。

## Mybatis逆向工程，三步 ##

### 第一步，下载Idea的mybatis插件 ###

### 第二步，和上述方式一样，连接数据库 ###

### 第三步，选择，确认即可 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyMTA1NjI5_size_16_color_FFFFFF_t_70 3]  
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