[JAVA]用Java实现的各种排序

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0 发表于: 2007-03-15

用Java语言实现的各种排序，包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。
插入排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;
/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class InsertSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

冒泡排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class BubbleSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=0;i for(int j=data.length-1;j>i;j--){
if(data[j] SortUtil.swap(data,j,j-1);
}
}
}
}

}

选择排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class SelectionSort implements SortUtil.Sort {

/*
* (non-Javadoc)
*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for (int i = 0; i < data.length; i++) {
int lowIndex = i;
for (int j = data.length - 1; j > i; j--) {
if (data[j] < data[lowIndex]) {
lowIndex = j;
}
}
SortUtil.swap(data,i,lowIndex);
}
}

}

Shell排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ShellSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
for(int i=data.length/2;i>2;i/=2){
for(int j=0;j insertSort(data,j,i);
}
}
insertSort(data,0,1);
}

/**
* @param data
* @param j
* @param i
*/
private void insertSort(int[] data, int start, int inc) {
int temp;
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc);
}
}
}

}

快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class QuickSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
quickSort(data,0,data.length-1);
}
private void quickSort(int[] data,int i,int j){
int pivotIndex=(i+j)/2;
file://swap
SortUtil.swap(data,pivotIndex,j);

int k=partition(data,i-1,j,data[j]);
SortUtil.swap(data,k,j);
if((k-i)>1) quickSort(data,i,k-1);
if((j-k)>1) quickSort(data,k+1,j);

}
/**
* @param data
* @param i
* @param j
* @return
*/
private int partition(int[] data, int l, int r,int pivot) {
do{
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot);
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
return l;
}

}

改进后的快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ImprovedQuickSort implements SortUtil.Sort {

private static int MAX_STACK_SIZE=4096;
private static int THRESHOLD=10;
/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] stack=new int[MAX_STACK_SIZE];

int top=-1;
int pivot;
int pivotIndex,l,r;

stack[++top]=0;
stack[++top]=data.length-1;

while(top>0){
int j=stack[top--];
int i=stack[top--];

pivotIndex=(i+j)/2;
pivot=data[pivotIndex];

SortUtil.swap(data,pivotIndex,j);

file://partition
l=i-1;
r=j;
do{
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot));
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
SortUtil.swap(data,l,j);

if((l-i)>THRESHOLD){
stack[++top]=i;
stack[++top]=l-1;
}
if((j-l)>THRESHOLD){
stack[++top]=l+1;
stack[++top]=j;
}

}
file://new InsertSort().sort(data);
insertSort(data);
}
/**
* @param data
*/
private void insertSort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

归并排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class MergeSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] temp=new int[data.length];
mergeSort(data,temp,0,data.length-1);
}

private void mergeSort(int[] data,int[] temp,int l,int r){
int mid=(l+r)/2;
if(l==r) return ;
mergeSort(data,temp,l,mid);
mergeSort(data,temp,mid+1,r);
for(int i=l;i<=r;i++){
temp=data; <b JF&,
} hQWo ]WF(J
int i1=l; Mz59ac
int i2=mid+1; azK7kM~
for(int cur=l;cur<=r;cur++){ [P:+n7= ,l
if(i1==mid+1) io&FW!J.
data[cur]=temp[i2++]; JxP&znng
else if(i2>r) fBj-R~;0
data[cur]=temp[i1++]; %P8*Az&]T
else if(temp[i1] data[cur]=temp[i1++]; + *xi&|%
else =1MVF
data[cur]=temp[i2++]; H18.)yHX
} LyRbD$m
} "O}u2B b
;?h+8Z/{
} K*!qt(D&
#gq!L
改进后的归并排序: ?hC,49
Lg%3M8-W~
package org.rut.util.algorithm.support; *JD-|mK
gZf8/Tp\z
import org.rut.util.algorithm.SortUtil; )44c[Z
@PL.7FM<v
/** Q[n*ce7L0
* @author treeroot gJ=y7yX
* @since 2006-2-2 W1;QPdz:
* @version 1.0 Xp67l!{v
*/ >TQNrS^$J
public class ImprovedMergeSort implements SortUtil.Sort { \rpXG9
;2y4^
private static final int THRESHOLD = 10; =&K8~
aPToP.e
/* c0ue[tb
* (non-Javadoc) TSKT6_IJw
* dug^oc1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5+DId7d'n
*/ m7#v2:OD+
public void sort(int[] data) { e,K.bgi
int[] temp=new int[data.length]; d1qvS@
mergeSort(data,temp,0,data.length-1); /R(]hmW
} xYd]|y
xqQLri}
private void mergeSort(int[] data, int[] temp, int l, int r) { -HU4Ow
int i, j, k; pN4gHi=
int mid = (l + r) / 2; ?hmuAgOtbh
if (l == r) #3knKBH
return; A8X3|<n=
if ((mid - l) >= THRESHOLD) xNd p]u
mergeSort(data, temp, l, mid); 8=MNzcA }
else ,,c+R?D
insertSort(data, l, mid - l + 1); ?E}9TQ
if ((r - mid) > THRESHOLD) -UoTBvObAm
mergeSort(data, temp, mid + 1, r); 1/3<u::
else _C3O^/<n4V
insertSort(data, mid + 1, r - mid); jO0"`|(]s
jwL\|B oE
for (i = l; i <= mid; i++) { E[ttamU
temp = data; HO_!/4hrU
} egmNX't6f5
for (j = 1; j <= r - mid; j++) { yZV Y3<]
temp[r - j + 1] = data[j + mid]; =5;tB
} =E w<s5C@
int a = temp[l]; Qv WvS9]
int b = temp[r]; ";U#aK1p
for (i = l, j = r, k = l; k <= r; k++) { o- v#Zl
if (a < b) { X> T_Xc
data[k] = temp[i++]; `iNH`:[w
a = temp; lyD=n
} else { tbXl5x0
data[k] = temp[j--]; _)S['[
b = temp[j]; ()Q#@?c~
} 7n)ob![\d
} ]++,7Z\AU
} ,m Nd#
dczq,evp
/** 34,'smHi%
* @param data K!,9qH
* @param l Yosfk\D
* @param i \iRmGvT
*/ G1a56TIN~
private void insertSort(int[] data, int start, int len) { <{T5}"e
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $ ~%w21?&
} '2Lx>nByk
} MCAWn H
} `>- 56 %
} D<gd)
J=J!)\m
堆排序： ^4Uk'T7V
jcp6-XM
package org.rut.util.algorithm.support; TbD $lx3>
. {vMn0c
import org.rut.util.algorithm.SortUtil; A*~BkvPr
j+PLtE
/** PA*1]i#2M=
* @author treeroot 7_R[=t
* @since 2006-2-2 Iqci}G%r
* @version 1.0 u2S8DuJ
*/ vScEQS$>
public class HeapSort implements SortUtil.Sort{ n/{ pQ&B
d`,z4_
/* (non-Javadoc) l{gR6U{e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Kk,u{EA
*/ R=3|(R+kA
public void sort(int[] data) { u+O"c
MaxHeap h=new MaxHeap(); KF6N P
h.init(data); ]9-iEQ
for(int i=0;i h.remove(); PXG@]$~3
System.arraycopy(h.queue,1,data,0,data.length); bcUSjG>
} r>}z|I'
5,pEJ>dDD3
private static class MaxHeap{ pD!j#suMA
<=Saf.
void init(int[] data){ 'jXJ!GFw
this.queue=new int[data.length+1]; XmP,3KG2{S
for(int i=0;i queue[++size]=data; h1)ny1;
fixUp(size); -zUBK
} p"6ydXn%
} e8E'X
XmaRg{22
private int size=0; icQQLSU5
($Op*bR
private int[] queue; 1#*^+A E
/#z"c]#
public int get() { 9C8 G(r
return queue[1]; $o.;}
} T[I7.8g
bXeJk]#y
public void remove() { 53$;ZO3
SortUtil.swap(queue,1,size--); iaJLIrl
fixDown(1); !*3]PZ25a(
} H|$ *HQm
file://fixdown b%KcS&-6
private void fixDown(int k) { oWx^_wQ-=
int j; Av0(zA2
while ((j = k << 1) <= size) { Rt7l`|g a+
if (j < size %26amp;%26amp; queue[j] j++; (Y*9[hm
if (queue[k]>queue[j]) file://不用交换 -Mf-8zw8G
break; PI@?I&Bo
SortUtil.swap(queue,j,k); A<^X P-Nrp
k = j; (! 8y~n1
} cE>m/^SKr
} d+vAm3.Dg
private void fixUp(int k) { 3ZbqZ"rE
while (k > 1) { #]Lodo9rS\
int j = k >> 1; |&@`~OBa
if (queue[j]>queue[k]) r/@Wn
break; i8KoJY"
SortUtil.swap(queue,j,k); F vTswM>
k = j; WFzM s
} q{%~(A5*H
} 5i}g$yjZ<
upaQoX/C
} ;<GK{8
0176
} @FZ_[CYg
~N/a\%`
SortUtil： *&I _fAh]
>K&chg@Hv
package org.rut.util.algorithm; +*Fe
D>^g2!b:
import org.rut.util.algorithm.support.BubbleSort; :0ltq><?
import org.rut.util.algorithm.support.HeapSort; ll[&O4.F
import org.rut.util.algorithm.support.ImprovedMergeSort; cq5^7.
import org.rut.util.algorithm.support.ImprovedQuickSort; yJ`{\7Uqg
import org.rut.util.algorithm.support.InsertSort; y>:U&P^
import org.rut.util.algorithm.support.MergeSort; `A5n6*A7
import org.rut.util.algorithm.support.QuickSort; CbXSJDs
import org.rut.util.algorithm.support.SelectionSort; [c -|`d^
import org.rut.util.algorithm.support.ShellSort; s(ap~UCOw
h6IO;:P)
/** 2.=G
* @author treeroot >$yA ,N
* @since 2006-2-2 $-|$4lrS
* @version 1.0 {2QP6XsJ
*/ [$uKI,l
public class SortUtil { k7{|\w%
public final static int INSERT = 1; c<lEFk!g
public final static int BUBBLE = 2; _mk@1ft
public final static int SELECTION = 3; vC^{,?@
public final static int SHELL = 4; a\~118 !
public final static int QUICK = 5; yye5GVY$
public final static int IMPROVED_QUICK = 6; p] N/]2rR
public final static int MERGE = 7; @h_ bXo
public final static int IMPROVED_MERGE = 8; ,`OQAJ)>
public final static int HEAP = 9; 4;>HBCM4-
oX*;iS X
public static void sort(int[] data) { lWd@
sort(data, IMPROVED_QUICK); ,jtaTG.>
} T@`Al('
private static String[] name={ >)u{%@Rcy{
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" OHW|?hI=[
}; @ULWVS#t2
<`G-_VI
private static Sort[] impl=new Sort[]{ Q&+)Kp]A
new InsertSort(), ?RIf0;G
new BubbleSort(), S{v]B_N[M
new SelectionSort(), RnU7|p{
new ShellSort(), FA;-D5=
new QuickSort(), T$AVMVq
new ImprovedQuickSort(), A0RSNAM
new MergeSort(), FzP1b_i
new ImprovedMergeSort(), @/ nGc9h
new HeapSort() hg:$H9\%
}; eX lJ=S}
*W^a<Zm8>
public static String toString(int algorithm){ gHkHAOe/
return name[algorithm-1]; ?Bl/bY$*h
} H'7s`^- >I
()w;~$J
public static void sort(int[] data, int algorithm) { `S5::U6E
impl[algorithm-1].sort(data); {]Cn@.TPD
} Vp0_R9oQ
#U7pT!Fx
public static interface Sort { ^u#iz
public void sort(int[] data); I.(@#v7T
} |W$|og'wC
61_-G#W
public static void swap(int[] data, int i, int j) { r{84Y!k~*
int temp = data; q_ryW$/_
data = data[j]; $cc]Av4c2
data[j] = temp; U 8p %MFD
} =yM%#{t&W
} g oyQ',+