[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; X<{m;T `
} Uoe?5Of(*
int i1=l; re!CF8 q
int i2=mid+1; L; ~=(
for(int cur=l;cur<=r;cur++){ gkdjH8(2
if(i1==mid+1) [Wh 43Z
data[cur]=temp[i2++]; x9e 9$ww}
else if(i2>r) E$wB bm
data[cur]=temp[i1++]; 'yNp J'
else if(temp[i1] data[cur]=temp[i1++]; u&Fm}/x
else 9T1G/0k-
data[cur]=temp[i2++]; uprQy<I@
} r:cUAe7#
} V_pBM
D4|_?O3|m
} 9wC; m:
;'p'8lts
改进后的归并排序: ;GAYcVB
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package org.rut.util.algorithm.support; :]s] =q&]
bqO"k t
import org.rut.util.algorithm.SortUtil; &}cie"\L
^~Sn{esA
/** 4=Ey\Px
* @author treeroot "Tv7*3>
* @since 2006-2-2 `{Jb{L@f
* @version 1.0 8(}sZ)6
*/ 1N+#(<x@,
public class ImprovedMergeSort implements SortUtil.Sort { vF&b|V+,
y6/X!+3+
private static final int THRESHOLD = 10; U6Ak"
g&>Hy!v,
/* bnGA.b
* (non-Javadoc) 4lA+V,#
* d%3BJ+J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lNb\^b
*/ 8;8}Oq
public void sort(int[] data) { tOw 0(-:iq
int[] temp=new int[data.length]; ?=kswf
mergeSort(data,temp,0,data.length-1); 7;NV 1RV
} nQ\k{%Q
arZIe+KW
private void mergeSort(int[] data, int[] temp, int l, int r) { s/M~RB!w
int i, j, k; Kcl$|T
int mid = (l + r) / 2; 37xxVbik
if (l == r) ''uI+>Y
return; {%{GZ
if ((mid - l) >= THRESHOLD) i1\2lh$
mergeSort(data, temp, l, mid); sFK<:ka
else _GqE'VX
insertSort(data, l, mid - l + 1); }=a4uCE
if ((r - mid) > THRESHOLD) fP58$pwu
mergeSort(data, temp, mid + 1, r); 5>)jNtZ
else keskD
insertSort(data, mid + 1, r - mid); 9#ft;c
pm\X*t}L
for (i = l; i <= mid; i++) { *a!!(cZZ
temp = data; Ib!rf:
} aUK4{F ;
for (j = 1; j <= r - mid; j++) { VU9P\|c@<
temp[r - j + 1] = data[j + mid]; ,rQ)TT
} vc#oALc&
int a = temp[l]; Y)}%SP>,
int b = temp[r]; I!gj;a?R
for (i = l, j = r, k = l; k <= r; k++) { 'V#ew\
if (a < b) { gqRTv_;
data[k] = temp[i++]; fhKiG%i'l
a = temp; ~aAJn IO
} else { sdYj'e:N
data[k] = temp[j--]; a +yI2s4Z
b = temp[j]; SzX~;pFM0
} Aq%^>YAp
} 2F@)nh
} D|j\ nQ
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/** E5G"QnxR>N
* @param data vUe *
* @param l zI_GdQNfN
* @param i @jSbMI
*/ s}9tK(4v
private void insertSort(int[] data, int start, int len) { %@n8 ?l4
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); KTjlWxD
} ,,%:vK+V
} VHr7GAmU
} cuaNAJ
} ,Bw)n,
W#I:j: p
堆排序： cvE.r330|
LG{inhbp
package org.rut.util.algorithm.support; 7'i#!5
6\fMzm
import org.rut.util.algorithm.SortUtil; RS `9?c:
U qw}4C/0
/** :dIQV(iW
* @author treeroot 'z}M[h K]
* @since 2006-2-2 68<Z\WP
* @version 1.0 ~X<cG=p~u
*/ [Cj)@OC
public class HeapSort implements SortUtil.Sort{ ?7MwTi8{F
F] ?@X
/* (non-Javadoc) 4UD=Y?zK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U?mf^'RE
*/ a,*p_:~i
public void sort(int[] data) { %m{.l4/!O
MaxHeap h=new MaxHeap(); D`:d'ow~KQ
h.init(data); uO@3vY',n
for(int i=0;i h.remove(); D&l,SD
System.arraycopy(h.queue,1,data,0,data.length); UlNfI}#X
} 1Dya?}3
o.3YM.B#
private static class MaxHeap{ ]]=fA 4(
XL PpxG
void init(int[] data){ ?Wg{oB@(
this.queue=new int[data.length+1]; *UBP]w
for(int i=0;i queue[++size]=data; 'K`Rbhy
fixUp(size); ~,*YmB=Z
} T<+ht8&M8
} I+"?,Ej$K
$.Q>M]xH
private int size=0; R G0S
Afy .3T @)
private int[] queue; n5+S"
-}X?2Q
public int get() { @>fO;*
return queue[1]; sCtw30BL
} 7ec0Xh1
p/k<wCm6
public void remove() { poQdI?ed,
SortUtil.swap(queue,1,size--); R'I_xjC
fixDown(1); Z@,PZ
} WVWS7N\
file://fixdown n(1wdlEp
private void fixDown(int k) { ^{*f3m/
int j; xshArJ&A
while ((j = k << 1) <= size) { xd|~+4
if (j < size %26amp;%26amp; queue[j] j++; !ASoXQRz
if (queue[k]>queue[j]) file://不用交换 g+}s:9
break; ;EJPrDHTk
SortUtil.swap(queue,j,k); inPE/Ux
k = j; wD6!#t k
} |O(-CDQe
} t1w2u.]
private void fixUp(int k) { UOWIiu
while (k > 1) { :'y{dbKp"
int j = k >> 1; <r<Dmn|\a
if (queue[j]>queue[k]) d]CviQUq
break; J-tq8
SortUtil.swap(queue,j,k); p:JRQT"A
k = j; NFY|^*bll
} cZe'!CQS
} 7Aio`&^
@)vy'qP d
} f2 ydL/M,
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} F)/~p&H
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SortUtil： *H5PT
CZJHE>
package org.rut.util.algorithm; BbrT f"`
Y9i9Uc.]
import org.rut.util.algorithm.support.BubbleSort; Nmp>UE,7[
import org.rut.util.algorithm.support.HeapSort; -@ZzG uS(
import org.rut.util.algorithm.support.ImprovedMergeSort; )X~Pr?52?
import org.rut.util.algorithm.support.ImprovedQuickSort; ]yAEjn9cN
import org.rut.util.algorithm.support.InsertSort; ~v2V`lxh
import org.rut.util.algorithm.support.MergeSort; r(: 8!=~K
import org.rut.util.algorithm.support.QuickSort; w%3Fg~Up
import org.rut.util.algorithm.support.SelectionSort; \E$1lc
import org.rut.util.algorithm.support.ShellSort; %2Epgh4?
e&$p-0DmT|
/** l:Dn3Q
* @author treeroot TBZ-17+
* @since 2006-2-2 3(!/["@7
* @version 1.0 (0E U3w?]
*/ Vk-W8[W 7
public class SortUtil { ~reQV6oQua
public final static int INSERT = 1; -F"d0a,
public final static int BUBBLE = 2; / R_ u\?k(
public final static int SELECTION = 3; ;TL(w7vK
public final static int SHELL = 4; 0)d?Y
public final static int QUICK = 5; uxa=KM1H
public final static int IMPROVED_QUICK = 6; Q[J [=
public final static int MERGE = 7; _0,"vFdj
public final static int IMPROVED_MERGE = 8; 8 7RHA $?
public final static int HEAP = 9; 7qP4B9S
(R_CUH
public static void sort(int[] data) { ?R;nL{
sort(data, IMPROVED_QUICK); 3sZ,|,ueD
} uAu( +zV2
private static String[] name={ ,b<9?PM
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" of8mwnZR
}; <ROpuY\!l
hZAG (Z
private static Sort[] impl=new Sort[]{ f49"pTw7
new InsertSort(), `$S^E !=
new BubbleSort(), +D:83h{
new SelectionSort(), 99^AT*ByY
new ShellSort(), 2)wAFO6u
new QuickSort(), w`L~#yu
new ImprovedQuickSort(), W|ReLM\
new MergeSort(), %p0b{P j_p
new ImprovedMergeSort(), I"ca+4]
new HeapSort() =op`fn%
}; tC&fAE:S
u3]Uxy
public static String toString(int algorithm){ [{`)j
return name[algorithm-1]; Bul.RCP'
} aXe{U}eow
~|&="K4,:
public static void sort(int[] data, int algorithm) { LeY+p]n~
impl[algorithm-1].sort(data); _yj1:TtCNT
} 4,2(nYF
BwC<rOU
public static interface Sort { |*:tyP%m^
public void sort(int[] data); 5k69F
} RCI4~q
pd d|n2q
public static void swap(int[] data, int i, int j) { E;6~RM:
int temp = data; uie~'K\y
data = data[j]; [UMLx
data[j] = temp; ?VB#GJ0M9
} bA}Z0a
} rO0ZtC{K