[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; wVp
} v\&Wb_;A
int i1=l; }"A.[9 b
int i2=mid+1; |E|d"_Ma
for(int cur=l;cur<=r;cur++){ $yG=exh3v
if(i1==mid+1) y_QK _R<f
data[cur]=temp[i2++]; 3^C
else if(i2>r) 2b2/jzO}J
data[cur]=temp[i1++]; hbn2(e;FZ
else if(temp[i1] data[cur]=temp[i1++]; IRD?.K]*
else |LWG7 ZE
data[cur]=temp[i2++]; ]M#_o]
} `N$<]i]s5
} gLU #\d]
9z,V]v=
} rtC.!].;%
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改进后的归并排序: TTu<~GH
!@5B:n*
package org.rut.util.algorithm.support; EE-jU<>|
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import org.rut.util.algorithm.SortUtil; E{|j
usX aT(K
/** F~4oPB K<
* @author treeroot BlMc<k
* @since 2006-2-2 k\I+T~~xD
* @version 1.0 S}mqK|!
*/ {|a=
public class ImprovedMergeSort implements SortUtil.Sort { .r$d 8J
i#=s_v8
private static final int THRESHOLD = 10; O6 bB CF;
%,1bh
/* =UT*1-yhR
* (non-Javadoc) d%8hWlffz
* 0escp~\Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )BmK'H+l
*/ +<7`Gn(n3
public void sort(int[] data) { |]*]k`o<)
int[] temp=new int[data.length]; v?vm-e
mergeSort(data,temp,0,data.length-1); DavpjwSn
} :[A>O(
,p {|f}0
private void mergeSort(int[] data, int[] temp, int l, int r) { IXc"gO
int i, j, k; bC&*U|de
int mid = (l + r) / 2; :>+}|(v
if (l == r) OLg=kF[[
return; @FU9!
if ((mid - l) >= THRESHOLD) ha&2V=
mergeSort(data, temp, l, mid); @Ge\odfF:
else ef*Vs
insertSort(data, l, mid - l + 1); vu Vcv
if ((r - mid) > THRESHOLD) /-4rcC
mergeSort(data, temp, mid + 1, r); W!MO}0s
else %L,mj
insertSort(data, mid + 1, r - mid); L/t'|<m
iK%%
for (i = l; i <= mid; i++) { lpi^<LQ@l
temp = data; YEqZ((H
} -C1,$mkj
for (j = 1; j <= r - mid; j++) { sT ]JDC6
temp[r - j + 1] = data[j + mid]; .?|pv}V
} +`'=K ;{U
int a = temp[l]; Po_y78ZD
int b = temp[r]; `o4alK\
for (i = l, j = r, k = l; k <= r; k++) { Y- esD'MD
if (a < b) { VB=$D|Ll
data[k] = temp[i++]; #6* j+SX^
a = temp; %PW_v~sg
} else { 2)cq!Zv
data[k] = temp[j--]; bh V.uBH
b = temp[j]; #2{H!jr
} i-Er|u; W
} }RvinF:5
} -q'G]}
X?kw=x{2P
/** KsVN<eR{
* @param data 7.}Vvg#G
* @param l ,sF49CD
* @param i l=4lhFG,Mk
*/ qJN!L))
private void insertSort(int[] data, int start, int len) { Ps<;DE\$f4
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =cz^g^7
} <MdIQ;I8
} oU"!"t
} ~FCkr&Ky3
} >JVdL\3
~$w9L998+
堆排序： zp.-=)D4e
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package org.rut.util.algorithm.support; ;D'6sd"
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import org.rut.util.algorithm.SortUtil; l|{q8i#4V
X3mHg5zt
/** csK;GSp}
* @author treeroot Qze.1h
* @since 2006-2-2 3&`LVhx
* @version 1.0 fD:BKJQ
*/ L"[2[p
public class HeapSort implements SortUtil.Sort{ 1xBgb/+
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/* (non-Javadoc) f N_8HP6&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rD_\NgVAs
*/ 1/\JJ\
public void sort(int[] data) { }%)]b*3
MaxHeap h=new MaxHeap(); V$o]}|
h.init(data); k7ye,_&>
for(int i=0;i h.remove(); 9^+8b9y
System.arraycopy(h.queue,1,data,0,data.length); {(#2G,
} )wqG^yv
^L4"X~eM
private static class MaxHeap{ W!jg
lf2Q
void init(int[] data){ <ddXvUCX
this.queue=new int[data.length+1]; fmgXh)=
for(int i=0;i queue[++size]=data; CqFk(Td9-D
fixUp(size); ^]n:/kZ5"[
} H"5=z7w
} \Dlmrke
,uoK'_
private int size=0; -_[ZRf?^
yor6h@F1
private int[] queue; 9u0<$UY%
Ie"eqO!
public int get() { 4(nwi[1Y
return queue[1]; @h=r;N#/`P
} i U"2uLgb
+Hd'*'c
public void remove() { ?Z(xu~^/
SortUtil.swap(queue,1,size--); fug Fk
fixDown(1); Gov]^?^D-
} M4}b lh#
file://fixdown 5do49H_
private void fixDown(int k) { $Cnv]1%
int j; X+7@8)1(
while ((j = k << 1) <= size) { Qo\+FkhYq
if (j < size %26amp;%26amp; queue[j] j++; 1[:tiTG|C
if (queue[k]>queue[j]) file://不用交换 _ci8!PP
break; GtLnh~)
SortUtil.swap(queue,j,k); a1dkB"Zp.p
k = j; 2I$-&c]
} O= 84ZP%
} qbx}9pp}g
private void fixUp(int k) { _=YHO.
while (k > 1) { 2'U+QK@
int j = k >> 1; XlJA}^e
if (queue[j]>queue[k]) Um%$TGw5
break; 1c4@qQyo
SortUtil.swap(queue,j,k); JRr'81\
k = j; h?7@]&VJ
} |SX31T9rG
} 8," 5z_
n?mV(?N
} 9f #6Q*/
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} / n@by4;W
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SortUtil： }rA _4%
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package org.rut.util.algorithm; irooFR[L9
,V &RpKek
import org.rut.util.algorithm.support.BubbleSort; \Z8:^ct.P
import org.rut.util.algorithm.support.HeapSort; v|IG G'r
import org.rut.util.algorithm.support.ImprovedMergeSort; _1ax6MwX
import org.rut.util.algorithm.support.ImprovedQuickSort; >NJ`*M
import org.rut.util.algorithm.support.InsertSort; Y]neTX [ef
import org.rut.util.algorithm.support.MergeSort; g9G 8;
import org.rut.util.algorithm.support.QuickSort; |R3A$r#-
import org.rut.util.algorithm.support.SelectionSort; M _e^KF
import org.rut.util.algorithm.support.ShellSort; !n3J6%b9y/
\1nj=ca?
/** d)1Pl3+
* @author treeroot jrN"en
* @since 2006-2-2 B&Iy_;
* @version 1.0 k)TNmpL%"
*/ ,M0#?j>
public class SortUtil { x.%x|6G*
public final static int INSERT = 1; +Z/aB*aVa^
public final static int BUBBLE = 2; iM_Zn!|@\
public final static int SELECTION = 3; :O9i:Xq[QW
public final static int SHELL = 4; 9B9:lR
public final static int QUICK = 5; MVkO >s
public final static int IMPROVED_QUICK = 6; 3-4CGSX;X
public final static int MERGE = 7; s#>``E!
public final static int IMPROVED_MERGE = 8; v]@n'!
public final static int HEAP = 9; k:DAko}
a&C}'e"
public static void sort(int[] data) { &O\$=&, h
sort(data, IMPROVED_QUICK); JW9U&Bj{
} d: LP8
private static String[] name={ :<PwG]LO
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $E6bu4I
}; J_N`D+m
&Ef_p-e-P
private static Sort[] impl=new Sort[]{ /2Qgg`^)
new InsertSort(), kpx2e2C|
new BubbleSort(), JG*Lc@Q
new SelectionSort(), 859ID8F
new ShellSort(), 56!/E5qgW
new QuickSort(), cUD}SOW
new ImprovedQuickSort(), aP`V
new MergeSort(), BkJNu_{m?
new ImprovedMergeSort(), {Ax{N
new HeapSort() $zD}hO9
}; ]}A3Pm- t*
&vV_,$
public static String toString(int algorithm){ ,#hx%$f}d
return name[algorithm-1]; wJ>2}
} <69Uq8GI
sHf.xc
public static void sort(int[] data, int algorithm) { 0k6S`e9gI
impl[algorithm-1].sort(data); #n6<jF1G
} m)"wd$O^w
Pj7n_&*/
public static interface Sort { RJ~I?{yR0[
public void sort(int[] data); ]x^v;r~
} ? yek\X
{3){f;b
public static void swap(int[] data, int i, int j) { eG\`SKx_
int temp = data; U9%#(T$
data = data[j]; ofHe8a8
data[j] = temp; 4t< mX
} rh$q]
} +5oK91o[y