[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; DBBBpb~~
} 5%+}rSn7
int i1=l; 1=Zw=ufqV
int i2=mid+1; aT!9W'uY
for(int cur=l;cur<=r;cur++){ ?=!XhU .
if(i1==mid+1) kqW<e[
data[cur]=temp[i2++]; ph?0I:eU
else if(i2>r) <cv1$ x ~P
data[cur]=temp[i1++]; 3DAGW"F
else if(temp[i1] data[cur]=temp[i1++]; %hbLT{w
else ,/6:bc:W
data[cur]=temp[i2++]; (?BgT i\
} p@Y$eZ:O
} &}0wzcMg
TucAs0-bF
} 8Wx@[!
P"h\7V,d%
改进后的归并排序: .'b3iG&
KVM@//:{
package org.rut.util.algorithm.support; C9U{^
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import org.rut.util.algorithm.SortUtil; 18"VB50b}
Z'NbHwW}
/** D}/=\J/
* @author treeroot Hu9R.[u
* @since 2006-2-2 lF8dRIav
* @version 1.0 o,Zng4NY
*/ i!W8Q$V
public class ImprovedMergeSort implements SortUtil.Sort { S@xsAib0J
pLQSG}N
private static final int THRESHOLD = 10; )L<?g!j~
o9LD6$
/* 1O2h9I$bk
* (non-Javadoc) %DRy&k/T
* 2^bpH%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pR6A#DgB
*/ ; G59}d p~
public void sort(int[] data) { ^wF@6e7/&
int[] temp=new int[data.length]; Q^Z<RA(C
mergeSort(data,temp,0,data.length-1); ?>.g;3E$
} 9LEilmPs
\U*-w:+@
private void mergeSort(int[] data, int[] temp, int l, int r) { `Kc %S^C'
int i, j, k; [Ht."VxR
int mid = (l + r) / 2; 5Ue^>8-
if (l == r) v^],loi<V
return; <`xRqe:&9
if ((mid - l) >= THRESHOLD) qi SEnRG.
mergeSort(data, temp, l, mid); Gr#rM/AfCK
else ZC5Yve8
insertSort(data, l, mid - l + 1); ^s@*ISY
if ((r - mid) > THRESHOLD) :uwRuPI
mergeSort(data, temp, mid + 1, r); mrhp)yF
else UI<PNQvo9
insertSort(data, mid + 1, r - mid); nE,gQHw
6Sb'Otw.
for (i = l; i <= mid; i++) { Ef`5fgp? S
temp = data; sK 1m9
} [B~zoB(
for (j = 1; j <= r - mid; j++) { L.0} UXd
temp[r - j + 1] = data[j + mid]; :Q r7:$S^
} P"=UI$HN
int a = temp[l]; bN4&\d*u#
int b = temp[r]; 7 xp1\j0
for (i = l, j = r, k = l; k <= r; k++) { )YnI!v2T
if (a < b) { 9O=05CQ
data[k] = temp[i++]; o?va#/fk
a = temp; CS;W)F
} else { K_&c5(-(_
data[k] = temp[j--]; A:.IBctsd
b = temp[j]; YoF\MT]W
} 1>@]@ST[:
} 38U5^`
} 2u~c/JryN
Xrj(,|
/** =tf@4_
* @param data [)H,zpl
* @param l Vgqvvq<S
* @param i [^U;
*/ pKxX{i1l
private void insertSort(int[] data, int start, int len) { y/@;c)1b9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); T`g?)/
} Lf; ta
} &6\r
} V|3yZ8lE
} :^H9W^2
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堆排序： 8L7Y A)u
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package org.rut.util.algorithm.support; AJ>BF.>
Th~3mf #
import org.rut.util.algorithm.SortUtil; -Ap2NpZ"t
^fE\S5P
/** @jE d%W
* @author treeroot } T/}0W]0
* @since 2006-2-2 qD(fYOX{C
* @version 1.0 bIb6yVnHi
*/ u+mjguIv
public class HeapSort implements SortUtil.Sort{ Q$?7)yyu+
7cUR.PI#Q
/* (non-Javadoc) %UUp=I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ok}{jwJ%W;
*/ o\@ A2r3
public void sort(int[] data) { agU%z:M{
MaxHeap h=new MaxHeap(); ,#E3,bu6_4
h.init(data); :$M9XZ~\
for(int i=0;i h.remove(); V6@*\+:3)
System.arraycopy(h.queue,1,data,0,data.length); DMAf^.,S
} 6z9R1&~%
;}n9yci#
private static class MaxHeap{ u#41osUVW>
Uh3wj|0
void init(int[] data){ B_SZ?o
this.queue=new int[data.length+1]; @tr&R==([
for(int i=0;i queue[++size]=data; #MhNdH#
fixUp(size); < v|%K.yd
} u8-a-k5<
} MtpU~c
MiSja#"+A
private int size=0; ]5} -y3
+,&m7L
private int[] queue; %uGleY]~
wO^$!zB W
public int get() { i7S>RB
return queue[1]; Mvy6"Q:
} LN@E\wRw{r
aW0u8Dz
public void remove() { RNv{n mf
SortUtil.swap(queue,1,size--); Iz6ss(UJ
fixDown(1); U8-Q'1IT&
} j>$=SMc
file://fixdown pau*kMu^}
private void fixDown(int k) { tJUVw=
int j; {E3xI2
while ((j = k << 1) <= size) { l5FuMk-
if (j < size %26amp;%26amp; queue[j] j++; ki;!WhF~
if (queue[k]>queue[j]) file://不用交换 B;xZ%M]
break; iEiu%T>
SortUtil.swap(queue,j,k); W<\kf4Y
k = j; TpJg-F
} Zg)_cRR
} )ZT6:)
private void fixUp(int k) { =dgo!k
while (k > 1) { Q^$ghZ6V
int j = k >> 1; ZhhI@_sz
if (queue[j]>queue[k]) zW%>"y
break; 7))y}N:p
SortUtil.swap(queue,j,k); ;\<""Yj@l
k = j; \p5|}<Sr)
} zb"rMzCH
} SQh+5
:d;[DYFLxb
} 69t7=r
F;IP3tD
} mSU@UD|'
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SortUtil： SV$nyV
TRF]i/Bs
package org.rut.util.algorithm; O!:QJ ^8d
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import org.rut.util.algorithm.support.BubbleSort; *-?Wcz
import org.rut.util.algorithm.support.HeapSort; 3.Ji5~
import org.rut.util.algorithm.support.ImprovedMergeSort; Oq*n9V
import org.rut.util.algorithm.support.ImprovedQuickSort; tRLE,(S,-
import org.rut.util.algorithm.support.InsertSort; xU@1!%l@
import org.rut.util.algorithm.support.MergeSort; _,DO~L
import org.rut.util.algorithm.support.QuickSort; 4cott^K.
import org.rut.util.algorithm.support.SelectionSort; J6*f Uh
import org.rut.util.algorithm.support.ShellSort; q}#iV$dAj
|:./hdcad
/** IZO@V1-m
* @author treeroot D,c!#(v cK
* @since 2006-2-2 JT4wb]kdV
* @version 1.0 JDkCUN5
*/ :~vxZ*a
public class SortUtil { bAdiA2VF'
public final static int INSERT = 1; j3 6,w[Y:
public final static int BUBBLE = 2; <v]z6B@9!
public final static int SELECTION = 3; $[[?;g
public final static int SHELL = 4; +C'XS{K,#
public final static int QUICK = 5; t2"@Ps&1|
public final static int IMPROVED_QUICK = 6; [-4KY4R
public final static int MERGE = 7; :%N*{uy
public final static int IMPROVED_MERGE = 8; wz|DT3"Xs
public final static int HEAP = 9; }x]&L/
ypH8QfxLTr
public static void sort(int[] data) { B9YsA?hg
sort(data, IMPROVED_QUICK); BY3bpR
} {1jpLdCbV^
private static String[] name={ vwVVBG;t
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" G@9u:\[l
}; 5B1G?`]?
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private static Sort[] impl=new Sort[]{ BYS lKTh
new InsertSort(), P^"R4T
new BubbleSort(), M~als3
new SelectionSort(), RoX &+~
new ShellSort(), (4~X}:
new QuickSort(), Mal<iNN
new ImprovedQuickSort(), ba8 6 N
new MergeSort(), ,I ZqLA
new ImprovedMergeSort(), .hKhrcQp
new HeapSort() a.?v*U@z@#
}; ~F;CE"3A
?KCivf
public static String toString(int algorithm){ {J2#eiF
return name[algorithm-1]; D z@1rc<B
} \SOeTn+
S`=n&'
public static void sort(int[] data, int algorithm) { hd5$yU5JQ
impl[algorithm-1].sort(data); IhE9snJ[
} (VyA6a8
T'.[F
public static interface Sort { rIVvO
public void sort(int[] data); Tp?-*K
} kae2 73"
?mMW*ico
public static void swap(int[] data, int i, int j) { :s"2Da3B
int temp = data; -j&Vtr
data = data[j]; .Rvf/-e
data[j] = temp; }S*/b1
} ZZ("-#?
} )|pU.K9qZ