Springboot获取数据--@insert+@update+@delete+@select

Springboot获取数据–@insert+@update+@delete+@select

对数据的基本操作是必然的，springboot的几个，我就给大家讲讲我在实战的时候所遇到的坑。
Javabean

package com.taopan.bean;

public class StudentGrade {
    private int gradeid;
    private int studentid;
    private String studentname;
    private String studentclass;
    private int gradec;
    private int gradejava;
    private int gradejavaweb;

    public int getGradeid() {
        return gradeid;
    }

    public void setGradeid(int gradeid) {
        this.gradeid = gradeid;
    }

    public int getStudentid() {
        return studentid;
    }

    public void setStudentid(int studentid) {
        this.studentid = studentid;
    }

    public String getStudentname() {
        return studentname;
    }

    public void setStudentname(String studentname) {
        this.studentname = studentname;
    }

    public String getStudentclass() {
        return studentclass;
    }

    public void setStudentclass(String studentclass) {
        this.studentclass = studentclass;
    }

    public int getGradec() {
        return gradec;
    }

    public void setGradec(int gradec) {
        this.gradec = gradec;
    }

    public int getGradejava() {
        return gradejava;
    }

    public void setGradejava(int gradejava) {
        this.gradejava = gradejava;
    }

    public int getGradejavaweb() {
        return gradejavaweb;
    }

    public void setGradejavaweb(int gradejavaweb) {
        this.gradejavaweb = gradejavaweb;
    }

    @Override
    public String toString() {
        return "StudentGrade{" +
                "gradeid=" + gradeid +
                ", studentid=" + studentid +
                ", studentname='" + studentname + '\'' +
                ", studentclass='" + studentclass + '\'' +
                ", gradec=" + gradec +
                ", gradejava=" + gradejava +
                ", gradejavaweb=" + gradejavaweb +
                '}';
    }
}

1、@select
查全表

@Select("select * from studentgrade ")
 public List queryGrade();

有条件查询

 @Select("select * from studentgrade where gradeid=#{gradeid}")
    public StudentGrade queryOne(@Param("gradeid") int gradeid);

查总数

@Select("select count(1) from account")
    public int querySize();

模糊查询

@Select("select * from studentgrade where studentname like #{name} or studentclass like #{name} ")
    public List   selectMohu(@Param("name") String name);

分页查询：

@Select("select * from studenttest limit #{pageno},#{pageSize}")
    public List query(@Param("pageno") int pageno, @Param("pageSize")int pageSize);

2、删除

@Delete("delete from studentgrade where gradeid=#{gradeid} ")
    public int delete(@Param("gradeid") int gradeid);

3、插入

 @Insert("insert into studentgrade values(#{studentgrade.gradeid},#{studentgrade.studentid},#{studentgrade.studentname},#{studentgrade.studentclass},#{studentgrade.gradec},#{studentgrade.gradejava},#{studentgrade.gradejavaweb})")
    public int insert(@Param("studentgrade") StudentGrade studentGrade);

4、更新

@Update("update studentgrade set studentid=#{studentgrade.studentid},studentname=#{studentgrade.studentname},studentclass=#{studentgrade.studentclass},gradec=#{studentgrade.gradec},gradejava=#{studentgrade.gradejava},gradejavaweb=#{studentgrade.gradejavaweb} where gradeid=#{studentgrade.gradeid}")
    public int update1(@Param("studentgrade")StudentGrade studentgrade);

这个文件里面的方法名不能相同！！我吃了这个亏。