[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; jj2iF/
} 6-_g1vq
int i1=l; zY_J7,0g
int i2=mid+1; AF{uFna
for(int cur=l;cur<=r;cur++){ <.n,:ir
if(i1==mid+1) D:U6r^c
data[cur]=temp[i2++]; rC^5Z
else if(i2>r) <}{<FXk[
data[cur]=temp[i1++]; )-)rL@s.
else if(temp[i1] data[cur]=temp[i1++]; MOaI~xZ
else ))|d~m
data[cur]=temp[i2++]; T:@6(_Z
} F%|P#CaB
} W-s6+DY
k;+TN9
} \DQu!l@1U
1Q(KZI
改进后的归并排序: mufGv%U2
o{,IO!q
package org.rut.util.algorithm.support; A4,{ep'Z!
FprdP*/
import org.rut.util.algorithm.SortUtil; ]{6/6jl
6~%><C
/** ?;CIS$$r
* @author treeroot RQQ'Wg
* @since 2006-2-2 'cpm 4mT
* @version 1.0 &>Ve4!i q
*/ I2$DlEke
public class ImprovedMergeSort implements SortUtil.Sort { \ T#|<=
K`Kv.4
private static final int THRESHOLD = 10; W:RjWn@<
2~$S @c
/* :lB`K>)iB}
* (non-Javadoc) j J{F0o
* LRu,_2"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rH`\UZ{cc
*/ prj(
public void sort(int[] data) { 940:NOgm
int[] temp=new int[data.length]; c36p+6rJk=
mergeSort(data,temp,0,data.length-1); 'z"vk
} /Yy)=~t{
5VTVx1P[8
private void mergeSort(int[] data, int[] temp, int l, int r) { ^H.B6h?
int i, j, k; Fa>f'VXx
int mid = (l + r) / 2; #4bT8kq
if (l == r) u4~+Bc_GL
return; \.mVLLtG
if ((mid - l) >= THRESHOLD) 2]mV9B
mergeSort(data, temp, l, mid); <(jk}wa<
else 00 x-
insertSort(data, l, mid - l + 1); ]%A> swCpn
if ((r - mid) > THRESHOLD) bs"J]">(N
mergeSort(data, temp, mid + 1, r); )ovAGO
else .b]sQ'
insertSort(data, mid + 1, r - mid); "KP]3EyPc
>;MJm
for (i = l; i <= mid; i++) { Q<V(#)*
temp = data; 61H_o7XXk
} Xb%Q%"?~
for (j = 1; j <= r - mid; j++) { vWoppt
temp[r - j + 1] = data[j + mid]; @.-S(MNR
} * |,N/e
int a = temp[l]; ^yPZ$Q
int b = temp[r]; !{^kH;*u
for (i = l, j = r, k = l; k <= r; k++) { IADHe\.
if (a < b) { 3Tu]-.
data[k] = temp[i++]; ;|vP|Xi
a = temp; 3Qe|'E,U
} else { P'qBqx[
data[k] = temp[j--]; L6_%SGY_iE
b = temp[j]; s<{ Hu0K$
} V gMgeja
} ]_h3
} j2Dw7"f3
o+Jnn"8
/** \+V"JIStUj
* @param data nv_vFK
* @param l !4afU:
* @param i csW\Q][
*/ 9s"st\u 4
private void insertSort(int[] data, int start, int len) { Z>`\$1CI
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); I #1~CbR
} E_=F'sP?
} $97O7j@
} /8e}c`
} cRf F!EV
X~jdOaq{F:
堆排序： c`xNTr01
G"?7 Z&+
package org.rut.util.algorithm.support; *eoH"UFYQ#
d/9YtG%q
import org.rut.util.algorithm.SortUtil; m&gd<rt/
1+Gq<]@G
/** 3FR(gr$X
* @author treeroot c7r(&h
* @since 2006-2-2 (O+d6oT=Z2
* @version 1.0 l}/_(*
*/ )oCL![^pXe
public class HeapSort implements SortUtil.Sort{ INr1bAe$
teS>t!d
/* (non-Javadoc) "/6#Z>y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }%Mdf6LS64
*/ M v(Pp
public void sort(int[] data) { xJ$uoy3+
MaxHeap h=new MaxHeap(); zTcz+3x
h.init(data); veq3t$sj
for(int i=0;i h.remove(); gttsxOgktH
System.arraycopy(h.queue,1,data,0,data.length); h,Hr0^?
} X0 |U?Ib?
et+lL"&
private static class MaxHeap{ B9NUafK=
X6 BIZ
void init(int[] data){ sR9$=91`
this.queue=new int[data.length+1]; !tTv$L>
for(int i=0;i queue[++size]=data; ,CyX*k8o
fixUp(size); &'/"=lK
} }9\_s*
} mvjx &+q
5&s6(?,Eu
private int size=0; 9Do75S{(
$^fF}y6N
private int[] queue; 0;TiNrzg
x4v:67_^
public int get() { f DXK<v)
return queue[1]; #`3Q4
} J-<P~9m~I
XDCm
public void remove() { @HbRfD/!
SortUtil.swap(queue,1,size--); xK6`|/e
fixDown(1); clU ?bF~e1
} E'\gd7t ;
file://fixdown t[q2W"#.
private void fixDown(int k) { y7UU'k`
int j; tlQ6>v'
while ((j = k << 1) <= size) { W]eILCo
if (j < size %26amp;%26amp; queue[j] j++; l!:bNMd
if (queue[k]>queue[j]) file://不用交换 iO*5ClB
break; tM"vIz 05
SortUtil.swap(queue,j,k); dQIF'==6
k = j; d=bKNA90
} Oz%6y ri
} ;t+p2i
private void fixUp(int k) { *}C%z(
while (k > 1) { 01@WU1IN
int j = k >> 1; p?$N[-W6-
if (queue[j]>queue[k]) YWn""8p;P
break; >!1]G"U
SortUtil.swap(queue,j,k); s;bGg
k = j; UUfM7gq
} 4|_xz;i
} :? B4q#]N
<2]h$53y!
} CCG5:xS
fh`Y2s|:7R
} 6k0Awcr
nX:E(9q7c
SortUtil： 9!=4}:+
,5zY1C==Ut
package org.rut.util.algorithm; 1L::Qu%E
:.AC%'S
import org.rut.util.algorithm.support.BubbleSort; 3Y#
import org.rut.util.algorithm.support.HeapSort; WILa8"M
import org.rut.util.algorithm.support.ImprovedMergeSort; f.J^HQ_
import org.rut.util.algorithm.support.ImprovedQuickSort; |I1,9ex
import org.rut.util.algorithm.support.InsertSort; kKF=%J?X
import org.rut.util.algorithm.support.MergeSort; O83J[YuzjN
import org.rut.util.algorithm.support.QuickSort; K7C <}y
import org.rut.util.algorithm.support.SelectionSort; k+{~#@
import org.rut.util.algorithm.support.ShellSort; -I{op wd
:i>LESJq
/** #tZ!D^GQHq
* @author treeroot 6%p6BK6
* @since 2006-2-2 ?:/J8s [O
* @version 1.0 ]uFJ~:R
*/ tiGH#~?
public class SortUtil { pHR`%2!"t
public final static int INSERT = 1; \ R}I4'
public final static int BUBBLE = 2; gtH^'vFZ
public final static int SELECTION = 3; U $#^ e
public final static int SHELL = 4; 2#$7!`6K
public final static int QUICK = 5; H 2I
public final static int IMPROVED_QUICK = 6; x(u.(:V
public final static int MERGE = 7; -}TP)/!,*
public final static int IMPROVED_MERGE = 8; t'Yd+FK
public final static int HEAP = 9; H$ nzyooh
f ] *w1
public static void sort(int[] data) { @{qcu\sZ
sort(data, IMPROVED_QUICK); e6'0g=Y#
} =?Ry,^=b
private static String[] name={ z}J~X%}e
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" xb[yy}>"L
}; pqs!kSJV
0UpRSh)#
private static Sort[] impl=new Sort[]{ +>1Yp">?
new InsertSort(), x3'ANw6E
new BubbleSort(), 2Ax(q&`9
new SelectionSort(), )xc1Lsrr9
new ShellSort(), =UO7!vr;[
new QuickSort(), I[Bp}6G
new ImprovedQuickSort(), hFoeVM[h
new MergeSort(), }6LcimQyK
new ImprovedMergeSort(), ZWyf.VJ
new HeapSort() ,hNs{-*
}; RoHX0
qK;J:GT>
public static String toString(int algorithm){ GKg #nXS
return name[algorithm-1]; JqLPJUr
} =S54p(>
A\mSS
public static void sort(int[] data, int algorithm) { evEdFY
impl[algorithm-1].sort(data); S~ckIN]
} N*m;A6?
SgQmR#5
public static interface Sort { n=rmf*,?
public void sort(int[] data); l{rHXST|
} g NE"z
uUaDesz~=
public static void swap(int[] data, int i, int j) { a$uDoi
int temp = data; 6G4~-_
data = data[j]; xPF.c,6b4=
data[j] = temp; }c9RDpjh~
} tWZ8(E$
} ow (YgM>t