[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; ?28GQyk4
} +fQ$~vr{'
int i1=l; R^O)fL0_
int i2=mid+1; !VZCM{
for(int cur=l;cur<=r;cur++){ H2_>Av{m
if(i1==mid+1) xg5@;p
data[cur]=temp[i2++]; ]A<u eM
else if(i2>r) {8p?we3l1
data[cur]=temp[i1++]; ghO//?m
else if(temp[i1] data[cur]=temp[i1++]; om39;nk!}
else =/'*(\C2
data[cur]=temp[i2++]; waq_d.
} wm`"yNbD
} *M!YQ<7G^d
\C\y'H5
} 9l^
j<-o{6r
改进后的归并排序: ~S{\wL53
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package org.rut.util.algorithm.support; o|n0?bThS-
LUVJ218p
import org.rut.util.algorithm.SortUtil; @:&dOqQ
YZtA:>;p
/** .0;k|&eBD
* @author treeroot 1ZW'PXUZ
* @since 2006-2-2 _^sSI<&m
* @version 1.0 lfhKZX
*/ E1Aa2
public class ImprovedMergeSort implements SortUtil.Sort { qvE[_1QCc
eOO*gM=
private static final int THRESHOLD = 10; =` >Nfa+,
:H:}t>X6Vo
/* O.f3 (e!
* (non-Javadoc) Ps5wQaS
* ) G&3V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7Ki7N{Kt
*/ t7%Bv+Uo
public void sort(int[] data) { d#,V^
int[] temp=new int[data.length]; u"$HWB~@z
mergeSort(data,temp,0,data.length-1); ebwoMG,B-
} (:k`wh&
v"TH[}C9D
private void mergeSort(int[] data, int[] temp, int l, int r) { =umS^fJ5`
int i, j, k; I}3K,w/7mi
int mid = (l + r) / 2; ?Og;W9i
if (l == r) 9e*poG
return; l),13"?C(
if ((mid - l) >= THRESHOLD) {%}6d~Bg
mergeSort(data, temp, l, mid); Q*o4zW
else 8j+;Xlh
insertSort(data, l, mid - l + 1); E1[%~Cpw*
if ((r - mid) > THRESHOLD) UZ0O j5B.
mergeSort(data, temp, mid + 1, r); !t{!.
else g{{SY5qDj
insertSort(data, mid + 1, r - mid); 45JLx?rN_
e+aQ$1^t
for (i = l; i <= mid; i++) { AU\!5+RDB
temp = data; S8<aq P
} 1#RA+d(
for (j = 1; j <= r - mid; j++) { [$+61n}.12
temp[r - j + 1] = data[j + mid]; .v8=zi:7Y
} 8)ol6Mi{
int a = temp[l]; P3>2=qK"E(
int b = temp[r]; Z)~4)71Y:
for (i = l, j = r, k = l; k <= r; k++) { CtxK{:
if (a < b) { KwyXM9h6=
data[k] = temp[i++]; (P_+m#
a = temp; w-/Tb~#E
} else { N.rB-
data[k] = temp[j--]; G_o4A:2
b = temp[j]; C*<LVW{P
} pYQs|5d
} <VPtbM@(m
} EaL+}/q&
7%WI
/** Jl}7]cVq#
* @param data )E|Bb=%
* @param l g9.hR8X
* @param i .!! yj,bQz
*/ s=+G%B'
private void insertSort(int[] data, int start, int len) { Y6Q6--P
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); X} 8U-N6)
} ]|(?i ,p
} U[u6UG
} {^iV<>J
} W3kilhZ
?,[w6O*
堆排序： &kt#p;/p?
re2%e-F"
package org.rut.util.algorithm.support; Pd?YS!+S
7Q&P4{hi0
import org.rut.util.algorithm.SortUtil; (C|%@61S
I-I5^s
/** >@o*v*25
* @author treeroot #B[>\D"*
* @since 2006-2-2 fC[gu$f][
* @version 1.0 *G38N]|u6
*/ x(Z@R\C-a
public class HeapSort implements SortUtil.Sort{ 3m'6cMQ
OduTg^R
/* (non-Javadoc) J/ ~]A1fP6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Y,r2m nq
*/ wO9<An
public void sort(int[] data) { >Ww F0W9?
MaxHeap h=new MaxHeap(); ;DOz92X94
h.init(data); 70Am]L&M
for(int i=0;i h.remove(); uB?YJf .T@
System.arraycopy(h.queue,1,data,0,data.length); 6>Fw,$
} m[XN,IE#u
))vwofkw4
private static class MaxHeap{ >=(e}~5y
0J"3RTt
void init(int[] data){ <f%9w]
this.queue=new int[data.length+1]; r_",E=e
for(int i=0;i queue[++size]=data; JqO( ]*"Hi
fixUp(size); Q]HRg4r
} @QEVl
} POf \l
??Lxb% 7R
private int size=0; Z'~5L_.]Ai
uE2Yn`Ha
private int[] queue; y\:2Re/*Jt
a]*^uEs
public int get() { #rC% \
return queue[1]; BsAglem
} [O3R(`<e5
/>?d 2?
public void remove() { X$aMf&x
SortUtil.swap(queue,1,size--); ;Mc}If*
fixDown(1); Mm5l>D'c
} c:bB4ch}
file://fixdown Mo/xEB/O
private void fixDown(int k) { %+.]>''a
int j; cb+!H>+
while ((j = k << 1) <= size) { sTb/l!=o
if (j < size %26amp;%26amp; queue[j] j++; _^B+Xo@E-
if (queue[k]>queue[j]) file://不用交换 5]{YERa'
break; 3+Q6<MS q
SortUtil.swap(queue,j,k); E-/]UH3u H
k = j; o8" [6Ys
} wNPZ[V:
} E,;nx^`!l
private void fixUp(int k) { 9'tM65K
while (k > 1) { o)$sZ{` ="
int j = k >> 1; iJ\#su
if (queue[j]>queue[k]) FvkKM+?F
break; @U&|38
SortUtil.swap(queue,j,k); `s+qz
k = j; qAU]}Et/
} +5Mx0s(5
} U;^{uQJ+,
@/9> /?JP
} 33; ytd
P -Pt{:
} L3/ua
wiutUb Y
SortUtil： @a~K#Bvlm
(YR1ML3N
package org.rut.util.algorithm; E$G8-
kqyY:J
import org.rut.util.algorithm.support.BubbleSort; 5%Q!R%
import org.rut.util.algorithm.support.HeapSort; {30A1>0#P
import org.rut.util.algorithm.support.ImprovedMergeSort; h7*m+/O
import org.rut.util.algorithm.support.ImprovedQuickSort; q[+];
import org.rut.util.algorithm.support.InsertSort; # OJD<=")
import org.rut.util.algorithm.support.MergeSort; !rXyw`6N
import org.rut.util.algorithm.support.QuickSort; 8T%z{A1T
import org.rut.util.algorithm.support.SelectionSort; m1(rAr1
import org.rut.util.algorithm.support.ShellSort; D3_,2
4g6d6~098;
/** # wG}T .*
* @author treeroot 6l50IWj,T
* @since 2006-2-2 NZ Xmrc{S
* @version 1.0 ;}r#08I
*/ C9~CP8
public class SortUtil { < B'BlqTS
public final static int INSERT = 1; HK}C<gg
public final static int BUBBLE = 2; !#>{..}}3
public final static int SELECTION = 3; 1X=}
public final static int SHELL = 4; S3 &L
public final static int QUICK = 5; %=GnGgu
public final static int IMPROVED_QUICK = 6; d/"e3S1
public final static int MERGE = 7; GU_R6Wt+
public final static int IMPROVED_MERGE = 8; VPf=LSxJe
public final static int HEAP = 9; $oh}!Smt
t,&1~_9
public static void sort(int[] data) { '(ql7
sort(data, IMPROVED_QUICK); ?-6oh~W<
} f 1]1ZOb
private static String[] name={ gi~*1RIel;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8E|S`I
}; UE*M\r<
@dw0oRF
private static Sort[] impl=new Sort[]{ Z:5e:M
new InsertSort(), b]@^SN9
new BubbleSort(), )/Ul"QF
new SelectionSort(), q&7J1
new ShellSort(), IRD?.K]*
new QuickSort(), 4R.rSsAH
new ImprovedQuickSort(), B!6?+<J"
new MergeSort(), IE,xiV
new ImprovedMergeSort(), iE>T5XV8$B
new HeapSort() LLCMp3qBz
}; iku) otUc
r6JdF!\d
public static String toString(int algorithm){ p"3_u;cN
return name[algorithm-1]; ?bW|~<X~
} dy`K5lC@
{|a=
public static void sort(int[] data, int algorithm) { HOBM?|37CU
impl[algorithm-1].sort(data); (@[c;+x
} 9F@Q
@LqLtr@A
public static interface Sort { xmsw'\
public void sort(int[] data); *+rO3% ;t
} <S<@V?h
C,HKao\
public static void swap(int[] data, int i, int j) { wgp{P>oBX
int temp = data; 9/'zk
data = data[j]; #Fm,mO$v
data[j] = temp; ?@!dc6
} $GB/}$fd&
} rzsAnLxo