[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; &)Xc'RQ.C
} IdQ./@?
int i1=l; X/yq<_ g
int i2=mid+1; p&h?p\IF
for(int cur=l;cur<=r;cur++){ 1~*1W4};F8
if(i1==mid+1) Zge(UhZ
data[cur]=temp[i2++]; H+4j.eVzZU
else if(i2>r) .qgUD
data[cur]=temp[i1++]; Zz0e4C
else if(temp[i1] data[cur]=temp[i1++]; G18w3BFx
else ]K"&Vd
data[cur]=temp[i2++]; N% 4"9K
} GC{M"q|_
} V5w1ET
eXW|{asx
} $@>0;i::
y3zP`^
改进后的归并排序: Ix5&B6L8
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package org.rut.util.algorithm.support; TxX=(7V
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import org.rut.util.algorithm.SortUtil; rZ~w_DK*
_y@].G
/** mHxR4%i5
* @author treeroot :OG I|[
* @since 2006-2-2 iQ;p59wSzL
* @version 1.0 T#))_aC
*/ wY8:j
public class ImprovedMergeSort implements SortUtil.Sort { {_QdB;VwH
f8Iddm#
private static final int THRESHOLD = 10; p+CUYo(
8R,<S-+v
/* p49]{2GXb
* (non-Javadoc) =V[uXm
* ~SnUnNDm`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Jsz!ro
*/ xT%`"eM}
public void sort(int[] data) { n t}7|h|
int[] temp=new int[data.length]; p;O%W@n"
mergeSort(data,temp,0,data.length-1); UFG_ZoD+
} uu9M}]mDl
V ~C$|+>e
private void mergeSort(int[] data, int[] temp, int l, int r) { ffZ~r%25{
int i, j, k; 5E&#Kh(I
int mid = (l + r) / 2; tAdE<).!
if (l == r) _)M,p@!?=h
return; SIe!=F[
if ((mid - l) >= THRESHOLD) |eqBCZn
mergeSort(data, temp, l, mid); \D7bTn
else :?>7Z6
insertSort(data, l, mid - l + 1); CD$#}Id
if ((r - mid) > THRESHOLD) 'X^auyL
mergeSort(data, temp, mid + 1, r); Y`;}w}EcgR
else F5h/>
insertSort(data, mid + 1, r - mid); -8Jw_
rtV`Q[E
for (i = l; i <= mid; i++) { KK){/I=z
temp = data; Fx9-A8oIR
} Q&} 0owe
for (j = 1; j <= r - mid; j++) { O>~,RI!
temp[r - j + 1] = data[j + mid]; <+`%=r)4
} .%zcm
int a = temp[l]; =V^-@ji)b
int b = temp[r]; l8\UO<^fY
for (i = l, j = r, k = l; k <= r; k++) { \|]mClj#
if (a < b) { C=:<[_m`
data[k] = temp[i++]; VdLoi\-/L
a = temp; H@Dpht>[
} else { "Ms;sdjg}&
data[k] = temp[j--]; 0j.K?]f)h
b = temp[j]; E}@C4pS
} " kDiK`i
} J2YQdCL
} %#HU~X:
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/** !"rPSGK*
* @param data $></%S2g
* @param l J:xGEa t
* @param i oQ$yr^M
*/ Lc3&\q e
private void insertSort(int[] data, int start, int len) { v pI9TG
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); d#k(>+%=Q
} !wAT`0<94F
} j(;^XO Y#
} iUx\3d,
} }>A q<1%
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堆排序： $#Pxf
8Zv``t61
package org.rut.util.algorithm.support; o[|[xuTm
IGlR,tw_/
import org.rut.util.algorithm.SortUtil; k]b*&.EY1
TdtV (
/** swKkY`g
* @author treeroot +vBi7#&
* @since 2006-2-2 g3R(,IH
* @version 1.0 Syk)S<
*/ \Wbmmd}8
public class HeapSort implements SortUtil.Sort{ TT$Ao
ys[Li.s:
/* (non-Javadoc) :^;c(>u{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R.~[$G!
*/ odRiCiMH
public void sort(int[] data) { 6Rc=!_v^
MaxHeap h=new MaxHeap(); Knq9"k
h.init(data); i?00!t
for(int i=0;i h.remove(); / f%mYL
System.arraycopy(h.queue,1,data,0,data.length); yI0bSu<j-
} 55[ 4)*
t@q'm.:uw<
private static class MaxHeap{ +H)'(<
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void init(int[] data){ 7_0p& 3
this.queue=new int[data.length+1]; |)-kUu
for(int i=0;i queue[++size]=data; j8Z,:op
fixUp(size); U1RU2M]v
} 91-bz^=xO
} Up9{aX
s#2t\}/
private int size=0; %fS9F^AK
7)66e
private int[] queue; 0-2|(9 Kc
b}e1JPk}!
public int get() { jHLs 5%
return queue[1]; R4?>C-;
} $a(-r-_Fi]
Zk3Pv0c
public void remove() { eA!o#O.
SortUtil.swap(queue,1,size--); D6 B-#u!M
fixDown(1); @^{Hq6_`
} 2 $>DX\h
file://fixdown Z\&f"z?L
private void fixDown(int k) { sD|l}f
int j; h Yu6PWK
while ((j = k << 1) <= size) { Z;0~f<e%
if (j < size %26amp;%26amp; queue[j] j++; X{9^$/XsJ
if (queue[k]>queue[j]) file://不用交换 q z)2a2C
break; a#oROb-*~
SortUtil.swap(queue,j,k); #&3,T1i`
k = j; rpNb.
} .`or^`X3
} [ks_wvY:'
private void fixUp(int k) { /y$Omc^
while (k > 1) { hor7~u+
int j = k >> 1; }Zhe%M=}G
if (queue[j]>queue[k]) bIQ,=EA1
break; N&9o 1_}
SortUtil.swap(queue,j,k); 53Adic
k = j; jhu &Wh
} @s5=6z]=H
} Fs+tcr/\[
6].[z+
} BK$y>= `
b@CB +8$
} b3(*/KgK
C]^Ep
SortUtil： W!Tx%
JsEJ6!1
package org.rut.util.algorithm; Qg>NJ\*Q
rd <m:r
import org.rut.util.algorithm.support.BubbleSort; w5FIHYl6B
import org.rut.util.algorithm.support.HeapSort; I-#H+\S
import org.rut.util.algorithm.support.ImprovedMergeSort; %?~'A59
import org.rut.util.algorithm.support.ImprovedQuickSort; &@=Jm /5
import org.rut.util.algorithm.support.InsertSort; }=R]<`Sj.j
import org.rut.util.algorithm.support.MergeSort; \#sD`O
import org.rut.util.algorithm.support.QuickSort; 05UN <l]
import org.rut.util.algorithm.support.SelectionSort; F^!D[:;jK
import org.rut.util.algorithm.support.ShellSort; 3m1g"
JWVV?~1
/** -D^I;[j_
* @author treeroot hfB$4s9
* @since 2006-2-2 V&Y`?Edc
* @version 1.0 _]:b@gXUw
*/ _nGx[1G( 5
public class SortUtil { qGk+4 yC
public final static int INSERT = 1; R2bqhSlF
public final static int BUBBLE = 2; bM W|:rn
public final static int SELECTION = 3; F.s$Y+c!6
public final static int SHELL = 4; 2.qPMqH
public final static int QUICK = 5; H MOIUd
public final static int IMPROVED_QUICK = 6; yOM/UdWq
public final static int MERGE = 7; [8V;Q
public final static int IMPROVED_MERGE = 8; ~ |G&cg
public final static int HEAP = 9; lg%fjBY
Vaxg
public static void sort(int[] data) { 'nmGHorp
sort(data, IMPROVED_QUICK); 4.A^5J'W
} q^X7x_
private static String[] name={ w,|@e_|J
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ns[/M~_r
}; 3:nhZN/95T
0KA*6]h t
private static Sort[] impl=new Sort[]{ SmXJQ@jN
new InsertSort(), %h.zkocM
new BubbleSort(), U~G7~L &m
new SelectionSort(), "8za'@D"f
new ShellSort(), q(sTKT[V
new QuickSort(), i4D(8;
new ImprovedQuickSort(), bpu`'Vx
new MergeSort(), Iu'9yb
new ImprovedMergeSort(), <,vIN,Kl8/
new HeapSort() f-U zFlU
}; Ku5||u.F4*
X'A`"}=_
public static String toString(int algorithm){ lg^'/8^f
return name[algorithm-1]; r[9m-#)>
} v>X!/if<y
EEe$A?a;
public static void sort(int[] data, int algorithm) { DYX{v`>f^
impl[algorithm-1].sort(data); .ARYCTyG
} F`=p/IAJK
iSfRJ:_&6
public static interface Sort { S!K<kn`E3
public void sort(int[] data); U1\EwBK8*T
} 3Tr,waV
dJuyJl$*
public static void swap(int[] data, int i, int j) { *tjaac;z<J
int temp = data; c!w[)>v
data = data[j]; '1u?-2
data[j] = temp; i?L=8+9f
} QE 4
} /*C!]Z>.