[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`fWT:?=
} ys- w0H
int i1=l; ">v-CSHY
int i2=mid+1; o\N^Uu
for(int cur=l;cur<=r;cur++){ Egi(z9|Pp
if(i1==mid+1) 9ePR6WS4
data[cur]=temp[i2++]; r*kz`cJ
else if(i2>r) ^~kfo|
data[cur]=temp[i1++]; R+5yyk\
else if(temp[i1] data[cur]=temp[i1++]; pebNE3`#
else IO{iQ-Mg
data[cur]=temp[i2++]; v`\CzT
} Mt*eC)~Yx
} CuFlI?~8 z
sB=s .`9
} ,Yu2K`
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改进后的归并排序: ,8)aKy
lFV\Go
package org.rut.util.algorithm.support; Sd *7jW?
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import org.rut.util.algorithm.SortUtil; TeHxqWx
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/** TUX:[1~Nf[
* @author treeroot q22@ZRw
* @since 2006-2-2 ekCt1^5Y
* @version 1.0 &\W5|*`x-
*/ YDaGr6y4i
public class ImprovedMergeSort implements SortUtil.Sort { $]~|W3\G
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private static final int THRESHOLD = 10; `{&l _
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/* B*^8kc:)L
* (non-Javadoc) e/Y&d9` I
* F$HL\y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) GXwQ )P5]
*/ yPks,7U
public void sort(int[] data) { SD.c9
int[] temp=new int[data.length]; K_}81|=
mergeSort(data,temp,0,data.length-1); \79aG3MyK
} &`}ACTY'P
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private void mergeSort(int[] data, int[] temp, int l, int r) { A&C?|M?M
int i, j, k; ?jn";:
int mid = (l + r) / 2; N6h.zl&04
if (l == r) *lyRy/POB
return; \ocC'FmE
if ((mid - l) >= THRESHOLD) jF6[+bW<
mergeSort(data, temp, l, mid); eo<=Q|nI&
else GC)xQZU)s
insertSort(data, l, mid - l + 1); P`y 0FKS
if ((r - mid) > THRESHOLD) /H$/s=YU\U
mergeSort(data, temp, mid + 1, r); 4~e6z(
else gx=2]~O1(
insertSort(data, mid + 1, r - mid); NBO&VYs|
eXCH*vZY
for (i = l; i <= mid; i++) { bdyIt)tK+
temp = data; | (: PX
} ,S7M4ajVZB
for (j = 1; j <= r - mid; j++) { aq$adPtu
temp[r - j + 1] = data[j + mid]; (@cZmU,
} +f\r?8s
int a = temp[l]; j12khp?
int b = temp[r]; Wa'm]J
for (i = l, j = r, k = l; k <= r; k++) { r~sQdf
if (a < b) { to3D#9Ep
data[k] = temp[i++]; c59l/qoz
a = temp; d~w}{LR[1
} else { /;9]LC.g
data[k] = temp[j--]; 0[!38
b = temp[j]; ZZU"Q7`^
} ' 4Kf
} W_ubgCB
} 7_]Bu<{f
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/** ("_tML 8/p
* @param data 0BQ<a
* @param l }zqYn`ffD
* @param i Q*caX
*/ /;xmM2B'
private void insertSort(int[] data, int start, int len) { [ FNA:
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [(/IV+
} A!p70km2
} Y?V>%eBu
} ]F1ZeAh5
} >@StKj
X]v.Yk=wu
堆排序： k?ksv+e\
KHt.g`1:R
package org.rut.util.algorithm.support; `+EjmY
pYaq1_<+
import org.rut.util.algorithm.SortUtil; YJ~3eZQ
qJLtqv
/** Oz7WtN
* @author treeroot H8?Kgaj~vf
* @since 2006-2-2 ccJ!N
* @version 1.0 y3pr(w9A
*/ &#qy:
public class HeapSort implements SortUtil.Sort{ ~U_,z)<`)c
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/* (non-Javadoc) O)9{qU:[b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) VH5Vg We
*/ Dv[ 35[Yh
public void sort(int[] data) { t"]~e"
MaxHeap h=new MaxHeap(); %2TjG
h.init(data); U#1,]a\
for(int i=0;i h.remove(); 06~HVv
System.arraycopy(h.queue,1,data,0,data.length); 4O'X+dv^I
} Dl95Vo=1
\D,c*I|p7
private static class MaxHeap{ pm}!?TL
,MdK "Qa>
void init(int[] data){ K(B|o6[
this.queue=new int[data.length+1]; gv,8Wo
for(int i=0;i queue[++size]=data; :,BKB*a\
fixUp(size); l*z.20^P
} >6"u{Qmr
} q$6Tb
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private int size=0; s6J`i&uu
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private int[] queue; a5# B&|#q
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public int get() { [p# }=&d
return queue[1]; yZ]u{LJS
} JJ$q*
a'2^kds
public void remove() { $C8nPl' 7
SortUtil.swap(queue,1,size--); Wa+q[E
fixDown(1); V_Oj?MMpn
} >gFEA0-
file://fixdown =g+Rk+jn
private void fixDown(int k) { "iY=1F"\R
int j; .#ASo!O5q
while ((j = k << 1) <= size) { `@07n]KB
if (j < size %26amp;%26amp; queue[j] j++; dr iw\
if (queue[k]>queue[j]) file://不用交换 yxz"9PE/P
break; f]Q`8nU
SortUtil.swap(queue,j,k); sHQ82uX
k = j; %\2w 1
} 26Jb{o9Z<
} .y~vn[qN
private void fixUp(int k) { ;VAHgIpx;
while (k > 1) { zwa%$U
int j = k >> 1; K6l{wyMb|
if (queue[j]>queue[k]) ~t-!{F
break; :7-2^7z)
SortUtil.swap(queue,j,k); xLmgr72D
k = j; 5g(`U+,*(
} &?xZHr`
} ]1(G:h\
-*T<^G;rK
} d`+@ _)ea
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} r1)@ 7Nt
1$#{om9
SortUtil： t/TWLhx/
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package org.rut.util.algorithm; ^<VJ8jk<
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import org.rut.util.algorithm.support.BubbleSort; chF@',9t
import org.rut.util.algorithm.support.HeapSort; gLL8-T[9
import org.rut.util.algorithm.support.ImprovedMergeSort; -x?I6>{
import org.rut.util.algorithm.support.ImprovedQuickSort; $+$S}i=
import org.rut.util.algorithm.support.InsertSort; (7Q Fy
import org.rut.util.algorithm.support.MergeSort; R#x~f
import org.rut.util.algorithm.support.QuickSort; Btgxzf
import org.rut.util.algorithm.support.SelectionSort; ~l@ h
import org.rut.util.algorithm.support.ShellSort; gL:Vj%c
J>XMaI})U
/** d^sm;f
* @author treeroot P@wuk1
* @since 2006-2-2 2/W5E-tn
* @version 1.0 FbWcq_
*/ JgmX=6N
public class SortUtil { ~DYv6-p%
public final static int INSERT = 1; .h7`Q{
public final static int BUBBLE = 2; tr t^o
public final static int SELECTION = 3; e 1$<,.>
public final static int SHELL = 4; aF41?.s
public final static int QUICK = 5; ,p\:Z3{ZH
public final static int IMPROVED_QUICK = 6; Adma~]T9
public final static int MERGE = 7; L" GQQ
public final static int IMPROVED_MERGE = 8; =W_Pph
public final static int HEAP = 9; $ rU"Krf67
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public static void sort(int[] data) { BHZCM^
sort(data, IMPROVED_QUICK); zY=eeG+4s
} >3MzsAH\
private static String[] name={ y`|86` Y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {%b*4x0?
}; zv8AvNDK
Sd |=*X
private static Sort[] impl=new Sort[]{ miTySY6^
new InsertSort(), e#t7
new BubbleSort(), <n-}z[09
new SelectionSort(), 'C2X9/!,
new ShellSort(), # zbAA<f
new QuickSort(), Ap<kK0#h
new ImprovedQuickSort(), ZZu{ct9
new MergeSort(), :+qd>;yf#
new ImprovedMergeSort(), 7H l>UX,|
new HeapSort() -$2a@K,i
}; nign"r
45aUz@
public static String toString(int algorithm){ \QvoL
return name[algorithm-1]; wJ%;\06
} {)?:d6"
9k.5'#
public static void sort(int[] data, int algorithm) { };Oyv7D+b
impl[algorithm-1].sort(data); f)x(sk
} x,% %^(
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public static interface Sort { LN0pC}F
public void sort(int[] data); /L yoTBG
} BtA_1RO
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public static void swap(int[] data, int i, int j) { J_S8=`f%
int temp = data; $&~moAl
data = data[j]; 2t,N9@u=UN
data[j] = temp; J{!U;r!6
} |Fi{]9(G2
} 6|G&d>G$_