[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; /|4Q9=
} OqfhCNAY
int i1=l; Bo\a
int i2=mid+1; ^l]]qdNr
for(int cur=l;cur<=r;cur++){ =:xV(GK}
if(i1==mid+1) 'Z*\1Ci
data[cur]=temp[i2++]; jI*}y[o
else if(i2>r) QLn5#x~xb
data[cur]=temp[i1++]; %Y)PH-z
else if(temp[i1] data[cur]=temp[i1++]; 5 {T9*
else }<( "0jC
data[cur]=temp[i2++]; q7 %=`l
} b>hBct}
} Bi9 N
{ 4_I7r
} fP^W"y
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改进后的归并排序: ..P=D <'f
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package org.rut.util.algorithm.support; 2.fyP"P L
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import org.rut.util.algorithm.SortUtil; A%NK0j$;}
`l[6rf_.
/** 1S*8v7
* @author treeroot "4Vi=*2V
* @since 2006-2-2 p6&LZ=tL3
* @version 1.0 htUy2v#V
*/ h/0<:eZ*
public class ImprovedMergeSort implements SortUtil.Sort { J)7,&Gc6
p=8M0k
private static final int THRESHOLD = 10; _Ewy^;S%L
p\\P50(-
/* Xm"w,J&
* (non-Javadoc) ;#5-.z
* 7AGZu?1]M
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )#b}qc#`
*/ JEK%yMj
public void sort(int[] data) { M-&^
int[] temp=new int[data.length]; Sah<sb=
mergeSort(data,temp,0,data.length-1); }$&T O$LX
} mr{k>Un\
++J Bbuzj!
private void mergeSort(int[] data, int[] temp, int l, int r) { .XV]<)<K$
int i, j, k; dK0}% ]i3#
int mid = (l + r) / 2; |g7nh[
if (l == r) +BtLyQ
return; yBYuDfeZ
if ((mid - l) >= THRESHOLD) k=h/i8i2z
mergeSort(data, temp, l, mid); 5p]urfN-f
else WryW3];0OR
insertSort(data, l, mid - l + 1); )*^OPVt
if ((r - mid) > THRESHOLD) >j(I[_g
mergeSort(data, temp, mid + 1, r); Q>SPV8s
else 3<KZ.hr
insertSort(data, mid + 1, r - mid); :)A.E}G
VV0EgfJ
for (i = l; i <= mid; i++) { %9~kA5Qj
temp = data; r 48;_4d)D
} q_9N+-?{7
for (j = 1; j <= r - mid; j++) { nK?k<
temp[r - j + 1] = data[j + mid]; DU*g~{8T$
} .v #0cQX+.
int a = temp[l]; F?RCaj
int b = temp[r]; YobC'c\~9
for (i = l, j = r, k = l; k <= r; k++) { M/8#&RycQ
if (a < b) { $+!}Vtb
data[k] = temp[i++]; Azq#}Oe)u
a = temp; |k7ts&2
} else { Q^1#xBd
data[k] = temp[j--]; eu}:Wg2
b = temp[j]; ,z0~mN
} ~L\(/[
} Pq{YZMr
} 26('V `N
evndw>
/** t(z(-G|&
* @param data cjy0s+>>
* @param l bbQ10H
* @param i Sq?6R}q%
*/ >n$EeJ
private void insertSort(int[] data, int start, int len) { IxEQh)J X
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); k"DQbUy0L
} $X.'W\o|
} (zM+7tJH
} 43}&w.AS
} (<>Sz(
>PTu*6Z
堆排序： eo<~1w
WoClTb>F
package org.rut.util.algorithm.support; -Iruua7b
IJ #v"! D
import org.rut.util.algorithm.SortUtil; 5JU(@}Db
X*>o9J45V
/** \DcC1W
* @author treeroot ys.!S.k+
* @since 2006-2-2 RBv=
* @version 1.0 mk[d7Yt{O
*/ iaa (ce
public class HeapSort implements SortUtil.Sort{ \fM!^
m|#(gX|F
/* (non-Javadoc) ]mD=Br*r~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8ZNd|\
*/ e$/Zb`k
public void sort(int[] data) { qN`]*baS
MaxHeap h=new MaxHeap(); x%:>Ol
h.init(data); B!E<uVC
for(int i=0;i h.remove(); 0o"<^] _|
System.arraycopy(h.queue,1,data,0,data.length); @WDqP/4
} X/;"CM
R<0!?`b
private static class MaxHeap{ ,39$iHk
3$kv%uf{
void init(int[] data){ x9&tlKKxf
this.queue=new int[data.length+1]; JI[rIL\Ey
for(int i=0;i queue[++size]=data; *\~kjZ 3
fixUp(size); 66"ZH,335
} 9%)& }KK|
} @=<TA0;LL
G"UH4n[1ur
private int size=0; oVuj020
xt<, (4u
private int[] queue; {7pE9R5
/bNVgK`L5
public int get() { L/ICFa.G
return queue[1]; {L2Gb(YLW
} 2Z IpzH/8
8w@W8(3B
public void remove() { o7 -h'b-
SortUtil.swap(queue,1,size--); Nh7!Ah
fixDown(1); -)vp&-
} n]ppO U|[
file://fixdown c&I,eds
private void fixDown(int k) { 4iPua"8
int j; B|q3;P
while ((j = k << 1) <= size) { !,(bXa\^
if (j < size %26amp;%26amp; queue[j] j++; dXK~ Z:
if (queue[k]>queue[j]) file://不用交换 W%jX-
break; 4Igs\x{i
SortUtil.swap(queue,j,k); TeN1\rA,
k = j; #V9hG9%8
} OHtZ"^YG
} hDkqEkq1R
private void fixUp(int k) { Uf]Pd)D
while (k > 1) { t+)GB=C
int j = k >> 1; \tw#pk
if (queue[j]>queue[k]) ``YL] <<
break; B43#9CK`o
SortUtil.swap(queue,j,k); szsZFyW)+
k = j; ,LPFb6o
} zH\;pmWiN9
} Xde=}9
r;6YCI=z
} 0R^(rE"2#
j BQqpFH9
} gZ=9Y:$
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SortUtil： 4[EO[x4C
v%8-Al^G
package org.rut.util.algorithm; ;0X|*w1JO
`zsk*W1GA
import org.rut.util.algorithm.support.BubbleSort; {^19.F
import org.rut.util.algorithm.support.HeapSort; kA:;c}p
import org.rut.util.algorithm.support.ImprovedMergeSort; L!8?2 \5
import org.rut.util.algorithm.support.ImprovedQuickSort; W2.1xNWO
import org.rut.util.algorithm.support.InsertSort; [,A'
import org.rut.util.algorithm.support.MergeSort; m"m;(T{ v
import org.rut.util.algorithm.support.QuickSort; h}:5hi Jw
import org.rut.util.algorithm.support.SelectionSort; <n~g+ps
import org.rut.util.algorithm.support.ShellSort; !VZCM{
ZwrYss
/** u(G;57ms
* @author treeroot (lck6v?h
* @since 2006-2-2 #1!BD!u
* @version 1.0 |`D5XRVbi
*/ Q@.9wEAJ
public class SortUtil { czsoD)N
public final static int INSERT = 1; SFPIr0 u
public final static int BUBBLE = 2; ;@-5lCvC(+
public final static int SELECTION = 3; /t6u"I~
public final static int SHELL = 4; Hr,gV2n
public final static int QUICK = 5; =/'*(\C2
public final static int IMPROVED_QUICK = 6; -8kW!F
public final static int MERGE = 7; jxOVH+?l%
public final static int IMPROVED_MERGE = 8; nhxd
public final static int HEAP = 9; K[;,/:Y
U[ O!&:6
public static void sort(int[] data) { ^EBM;&;7
sort(data, IMPROVED_QUICK); ~4X!8b_
} Mw7UU1 ei
private static String[] name={ Q+js2?7^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" cZ2, u,4
}; iwTBE]J
J3SbyI!T
private static Sort[] impl=new Sort[]{ ;A'17B8
new InsertSort(), l#f]KLv4N_
new BubbleSort(), \hD bv5
new SelectionSort(), <EN[s
new ShellSort(), (2(;u1
new QuickSort(), :;u]Y7
new ImprovedQuickSort(), UlZ)|Ya<M
new MergeSort(), ;}9Ws6#XQs
new ImprovedMergeSort(), ^p%+rB.j[
new HeapSort() jP6G.aiO
}; tfIBsw.
B-p5;h>
public static String toString(int algorithm){ K>JU/(
return name[algorithm-1]; kT=|tQ@
} ' g!_Flk
NP`ll0s
public static void sort(int[] data, int algorithm) { en6AAr:U}
impl[algorithm-1].sort(data); {ZI6!zh'
} NbMH@6%E
%.gjBI=
public static interface Sort { bD[W~ku
public void sort(int[] data); \bmboNe
} t4W0~7
2Sd6b 2-
public static void swap(int[] data, int i, int j) { c@{^3V##T
int temp = data; Vx8.FNJh
data = data[j]; TK?N^ly
data[j] = temp; {$=%5
} BqAwo
} aL6 5t\2