[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; ;E!] /oY<
} H:WuMwD4
int i1=l; Zw<<p|{)<
int i2=mid+1; 7xO~v23oe
for(int cur=l;cur<=r;cur++){ K!2%8Ej,J
if(i1==mid+1) ~LP5hL
data[cur]=temp[i2++]; WD*z..`
else if(i2>r) v_pFI8Cz)
data[cur]=temp[i1++]; N0ef5J JM`
else if(temp[i1] data[cur]=temp[i1++]; afu!.}4Ct
else M=4b
data[cur]=temp[i2++]; 2p58_^l
} MlW*Tugg
} 8KKhD$
vWL|vR
} )@=fGNDt
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改进后的归并排序: e nw*[D !
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package org.rut.util.algorithm.support; o]GZq..
s3K!~v\L]
import org.rut.util.algorithm.SortUtil; ~]n=TEJ>
7?);wh7`
/** kE[R9RS!
* @author treeroot sk3AwG;A
* @since 2006-2-2 NK:! U
* @version 1.0 [N<rPHT
*/ 7*He 8G[W
public class ImprovedMergeSort implements SortUtil.Sort { 8==_43
rfr]bq5
private static final int THRESHOLD = 10; o1-_BlZ
LyL(~Jc|
/* *u< ZQq
* (non-Javadoc) |.-Muv
* b"B:DDw00
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wyLyPJv
*/ rFp>A`TJ
public void sort(int[] data) { #]Jg>
int[] temp=new int[data.length]; k)W&ZY
mergeSort(data,temp,0,data.length-1); uH[:R vC0
} Vjd>j; H
_6g(C_m'T?
private void mergeSort(int[] data, int[] temp, int l, int r) { 8NTE`l=>/
int i, j, k; ,ne3uPRu7~
int mid = (l + r) / 2; 2^f7GP
if (l == r) T8yMaC
return; 6& 6|R3
if ((mid - l) >= THRESHOLD) 0sB[]E|7[s
mergeSort(data, temp, l, mid); @rF|WT
else b/ h#{'
insertSort(data, l, mid - l + 1); `;j$]
if ((r - mid) > THRESHOLD) (A "yE4rYK
mergeSort(data, temp, mid + 1, r); QZ*gR#K]Sz
else Ds#BfP7a
insertSort(data, mid + 1, r - mid); i4XiwjCHN
;V?d;O4u
for (i = l; i <= mid; i++) { usC$NVdm
temp = data; hVui.]
} 15r=d
for (j = 1; j <= r - mid; j++) { NOKU2d4 G
temp[r - j + 1] = data[j + mid]; s'$2 }K
} `PSjkF(
int a = temp[l]; |"+Ufw^
int b = temp[r]; cv7:5P
for (i = l, j = r, k = l; k <= r; k++) { 8)ng> l
if (a < b) { sV\K[4HG
data[k] = temp[i++]; g(,^';j
a = temp; ]'-y-kqY
} else { /'b7q y
data[k] = temp[j--]; "fW }6pS
b = temp[j]; ^)(tO$S
} =G"ney2
} 1aCpeD4|)
} M|fV7g
/ :6|)AW.{
/** f8`dJ5i
* @param data Hmnxmgx
* @param l z,4 D'F&
* @param i KSHq0A6/q%
*/ J_.cC
private void insertSort(int[] data, int start, int len) { -3guuT3x\
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |(.%`BTD
} 0/9]TIc
} N"suR}9%
} j4+Px%sW
} #qpP37G
" 0m4&K(3,
堆排序： ~_c1h@
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package org.rut.util.algorithm.support; -6~.;M 5
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import org.rut.util.algorithm.SortUtil; wy0?*)~
S(?A3 H
/** / *PHX@
* @author treeroot !?/:p.
* @since 2006-2-2 rNTLP m
* @version 1.0 XM,slQ
*/ OZnKJ<
public class HeapSort implements SortUtil.Sort{ w,$qsmR
x!\q69ndv
/* (non-Javadoc) <aDZ{T%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2E[7RBFY+\
*/ !!H"B('m
public void sort(int[] data) { R&J?XQ
MaxHeap h=new MaxHeap(); ?Ve IlD
h.init(data); dRnf
for(int i=0;i h.remove(); q$mc{F($D
System.arraycopy(h.queue,1,data,0,data.length); oPM*VTMA
} $|.8@ nj
xZlCFu
private static class MaxHeap{ ~rJG4U
\r[u>7I
void init(int[] data){ %0N HU`j
this.queue=new int[data.length+1]; 1{ %y(?`
for(int i=0;i queue[++size]=data; ~IS8DW$;
fixUp(size); |=m.eU
} ^}B,0yUu'
} hW<v5!,
!W9:)5^X
private int size=0; ow.!4kx{d
#c>GjUJ.w
private int[] queue; 2_+>a"8Y
?(R3%fU
public int get() { f,KB BBbG
return queue[1]; x9 %=d
} AXW.`~ 4
^hmV?a:Y
public void remove() { oDz|%N2s|
SortUtil.swap(queue,1,size--); DylO;+
fixDown(1); f7lj,GAZ
} L ,dh$F
file://fixdown JfIXv
private void fixDown(int k) { hx$61E=
int j; cR/Nl pX
while ((j = k << 1) <= size) { *WQ?r&[_'
if (j < size %26amp;%26amp; queue[j] j++; Cp6S2v I
if (queue[k]>queue[j]) file://不用交换 QLWnP-
break; bOFzq>k_
SortUtil.swap(queue,j,k); gwRB6m$
k = j; d-D,Gx]>$
} jtP*C_Scv/
} 25$_tZPAI
private void fixUp(int k) { o$sD9xx
while (k > 1) { ew~Z/ A
int j = k >> 1; d_@ E4i
if (queue[j]>queue[k]) %^IQ<
break; E EDFyZ
SortUtil.swap(queue,j,k); 7~e,"^>T
k = j; i/x |c!E
} rx1u*L
} 0Z1ksfLU
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} d m8t~38
+'<PW+U$
} K ze?@*
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SortUtil： gjDNl/r/
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package org.rut.util.algorithm; R| ?Q&F_$
P%aqY~yF3
import org.rut.util.algorithm.support.BubbleSort; 6]brL.eGj
import org.rut.util.algorithm.support.HeapSort; oMQ4q{&|
import org.rut.util.algorithm.support.ImprovedMergeSort; K81X32Lm'
import org.rut.util.algorithm.support.ImprovedQuickSort; J=` 8
import org.rut.util.algorithm.support.InsertSort; I2[Z0G@&=
import org.rut.util.algorithm.support.MergeSort; 6e-ME3!<l
import org.rut.util.algorithm.support.QuickSort; =!'9TS
import org.rut.util.algorithm.support.SelectionSort; ys9:";X;}
import org.rut.util.algorithm.support.ShellSort; 0cS$S Mn{
7;EDU
/** Hd~g\
* @author treeroot B$eM
* @since 2006-2-2 ihrf/b
* @version 1.0 |Ea%nghl
*/ z%8`F%2
public class SortUtil { N%dY.Fk
public final static int INSERT = 1; x%viCkq
public final static int BUBBLE = 2; LYDiqOrx
public final static int SELECTION = 3; ?'> .>
public final static int SHELL = 4; 1Wpu
public final static int QUICK = 5; duG!QS:
public final static int IMPROVED_QUICK = 6; #X-C~*|>j
public final static int MERGE = 7; )'+[,z ;s
public final static int IMPROVED_MERGE = 8; D6bYg `
public final static int HEAP = 9; ^~~Rto)Y
iB)\*)
public static void sort(int[] data) { w"' Pn`T
sort(data, IMPROVED_QUICK); %'KRbY
} +#Pb@^6"m
private static String[] name={ `+,?%W)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <XLae'R
}; Hu|Tj<S
4S26TgY
private static Sort[] impl=new Sort[]{ UR'[?
new InsertSort(), b}qfOgd5
new BubbleSort(), >?^oxB"<Gc
new SelectionSort(), =Y2 Rht
new ShellSort(), vMz|'-rm$
new QuickSort(), 'zUV(K?2]
new ImprovedQuickSort(), 1M`E.Ztw*
new MergeSort(), m*y&z'e\
new ImprovedMergeSort(), KU8,8:yY
new HeapSort() SJiQg-+<Uf
}; h.Qk{v
rUKg<]&@
public static String toString(int algorithm){ \TP$2i%W
return name[algorithm-1]; $FPq8$V
} g (w/
yY#h1
public static void sort(int[] data, int algorithm) { r?DCR\Jq
impl[algorithm-1].sort(data); $z$^ yjL
} ] 2 `%i5
R'gd/.[e
public static interface Sort { &{j!!LL
public void sort(int[] data); Htgo=7!?\3
} ;^N lq3N
Zn9u&!T&
public static void swap(int[] data, int i, int j) { 7T/BzXr,B
int temp = data; 6Q:Wo)^!
data = data[j]; !.UE}^TV
data[j] = temp; ?|ZbQz(bL
} ]Za[]E8MD
} c'Z=uL<Rm