[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; Eq^k@
} (Da/$S.
int i1=l; / <WB%O
int i2=mid+1; /]_T
for(int cur=l;cur<=r;cur++){ 1"3|6&=
if(i1==mid+1) ^RytBwzKM
data[cur]=temp[i2++]; Rk.YnA_J6
else if(i2>r) o^;$-O!/
data[cur]=temp[i1++]; 6H67$?jMyJ
else if(temp[i1] data[cur]=temp[i1++]; <jF]SN
else cc7*O
data[cur]=temp[i2++]; yC !`6$
} wXp A1,i
} IW3ZHmrpA
~n%~ Z|mMF
} xaSvjc\
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改进后的归并排序: `,d*>
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package org.rut.util.algorithm.support; wEENN_w
o9G%KO&;D,
import org.rut.util.algorithm.SortUtil; ,ii*[{X?
C%d\DuJ5'~
/** c4ptY5R),
* @author treeroot $A"kHS7T
* @since 2006-2-2 KJ<7aZ
* @version 1.0 duB{1
*/ BJ!b LQ
public class ImprovedMergeSort implements SortUtil.Sort { ?|'+5$
GVk&n"9kp
private static final int THRESHOLD = 10; :@)UI,
/PG+ s6
/* /e :V44
* (non-Javadoc) D].!u{##
* T:q_1W?h]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~4h<nc
*/ BDSZ'
public void sort(int[] data) { ){`s&?M0
int[] temp=new int[data.length]; Kk1591'
mergeSort(data,temp,0,data.length-1); HQ~`ha.
} XL@i/5C[
'_,/N!-V
private void mergeSort(int[] data, int[] temp, int l, int r) { O,R5csMh
int i, j, k; R>SS\YC'X
int mid = (l + r) / 2; t!RR5!
if (l == r) >c%OnA,3
return; n 1MZHa,
if ((mid - l) >= THRESHOLD) )=l~XV
mergeSort(data, temp, l, mid); "a))TV%N
else 1oD,E!+^d
insertSort(data, l, mid - l + 1); E8gXa-hv
if ((r - mid) > THRESHOLD) B*btt+6
mergeSort(data, temp, mid + 1, r); _#@n^c
else k`JP
insertSort(data, mid + 1, r - mid); ntbl0Sk
=!T@'P?
for (i = l; i <= mid; i++) { !E!i`yF
temp = data; DhY.5
} iSu7K&X9q
for (j = 1; j <= r - mid; j++) { w>Iw&US
temp[r - j + 1] = data[j + mid]; W1'F)5(?7
} ,?k[<C
int a = temp[l]; 7S$Am84%
int b = temp[r]; eqbQ,, &
for (i = l, j = r, k = l; k <= r; k++) { 0+MNu8t
if (a < b) { twElLOE
data[k] = temp[i++]; -V0_%Smc
a = temp; eJA$J=^R;
} else { H'k$<S
data[k] = temp[j--]; Y,Dd}an
b = temp[j]; 3qJOE6[}%
} hw! l{yv
} C'&)""3d
} !z">aIj\6
G2 A#&86J{
/** _DsA<SJ]
* @param data YoyJnl.?u
* @param l m;-FP 2~
* @param i %B?@le+%
*/ >B>[_8=f@
private void insertSort(int[] data, int start, int len) { I?`}h}7.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); P^V,"B8t
} ;6S,|rC]
} XN9s!5A<L)
} Y~\71QE>
} su;u_rc,
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堆排序： 2%|
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package org.rut.util.algorithm.support; zh`!x{Z?^
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import org.rut.util.algorithm.SortUtil; m>yb}+
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/** n%'M?o]DF
* @author treeroot TNe,'S,%
* @since 2006-2-2 ZrY#B8
* @version 1.0 p}q27<O*/
*/ $ N`V%<W
public class HeapSort implements SortUtil.Sort{ 9U[Gh97Sf
ldp x,
/* (non-Javadoc) ql"&E{u?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gc(Gc vdB\
*/ AGaM &x=
public void sort(int[] data) { BS3Aczwk
MaxHeap h=new MaxHeap(); ,=sbK?&
h.init(data); mGx!{v~i&
for(int i=0;i h.remove(); \7b-w81M-
System.arraycopy(h.queue,1,data,0,data.length); DUH\/<^g
} ZK:dhwer
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private static class MaxHeap{ $VEG1]/svp
?LJ$:u
void init(int[] data){ fP3e{dVf
this.queue=new int[data.length+1]; cs[_TJo
for(int i=0;i queue[++size]=data; EWOS6Yg7
fixUp(size); p7 s#j
} kc*zP=
} )Z6bMAb0'N
]0N'Wtbn
private int size=0; \8j5b+
q5 eyle6
private int[] queue; #I> c$dd
i%BrnjX
public int get() { +*u'vt?
return queue[1]; 590.mCm
} kk|7{83O
fP 1V1ao
public void remove() { vTnrSNdSE
SortUtil.swap(queue,1,size--); (Hk4~v6pqC
fixDown(1); % mP%W<
} '{]1!yMh
file://fixdown L{`S^'P<
private void fixDown(int k) { 5mzOr4*0
int j; &UzeNL"]
while ((j = k << 1) <= size) { :`u?pc27Sm
if (j < size %26amp;%26amp; queue[j] j++; a=ye!CN^
if (queue[k]>queue[j]) file://不用交换 EQQ/E!N8l
break; b"D? @dGB,
SortUtil.swap(queue,j,k); tG8)!
k = j; Ah^0FU%!g
} ed3d 6/%HR
} ~ZrSoVP=
private void fixUp(int k) { 7D'-^#S5
while (k > 1) { /#mq*kNIM6
int j = k >> 1; .II*wKk
if (queue[j]>queue[k]) { 'A`ram
break; 'iQ
SortUtil.swap(queue,j,k); &d,chb(
k = j; ~nit~;
} `As|MYv
} D$X9xtT
%>,B1nt
} F; upb5
zzlqj){F
} JFOto,6L:
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SortUtil： 0*e)_l!
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package org.rut.util.algorithm; 7RXTQ9BS
~\vGwy
import org.rut.util.algorithm.support.BubbleSort; \VY!= 9EV
import org.rut.util.algorithm.support.HeapSort; n oWjZ
import org.rut.util.algorithm.support.ImprovedMergeSort; /"~ D(bw0=
import org.rut.util.algorithm.support.ImprovedQuickSort; ZtzSG@f
import org.rut.util.algorithm.support.InsertSort; QuF76&)7
import org.rut.util.algorithm.support.MergeSort; Xk2M.:3`
import org.rut.util.algorithm.support.QuickSort; {?2jvv
import org.rut.util.algorithm.support.SelectionSort; N=2BrKb)o
import org.rut.util.algorithm.support.ShellSort; rw CFt6;v
M.DU^-7
/** J#k3iE}
* @author treeroot '(ZJsw
* @since 2006-2-2 ]V*ku%L0
* @version 1.0 z@70{*
*/ 4}i2j
public class SortUtil { SW94(4qo
public final static int INSERT = 1; LwPZRE#
public final static int BUBBLE = 2; fj 14'T
public final static int SELECTION = 3; s,5SWdb\v
public final static int SHELL = 4; (~59}lu~
public final static int QUICK = 5; :S['hBMN
public final static int IMPROVED_QUICK = 6; ioIOyj
public final static int MERGE = 7; Drn{ucIs
public final static int IMPROVED_MERGE = 8; 'A^;P]y
public final static int HEAP = 9; tx$i(
O"'.n5>:`
public static void sort(int[] data) { 24Y8n
sort(data, IMPROVED_QUICK); 8S8^sP
} [{s 1=c
private static String[] name={ 4[\$3t.L
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" / 7i>0J]
}; @M]uUL-ze
$ 12mS
private static Sort[] impl=new Sort[]{ ;Avz%2#c`
new InsertSort(), YwbRzY-#F
new BubbleSort(), d]3c44kkK{
new SelectionSort(), Yg @&@S]
new ShellSort(), ]1 V,_^D
new QuickSort(), {"^LUw8fd
new ImprovedQuickSort(), q+j.)e
new MergeSort(), g]fdsZv
new ImprovedMergeSort(), "ITC P<+
new HeapSort() AD$$S.zoD<
}; |3Fo4K%+
Mz?xvP?z
public static String toString(int algorithm){ fG *1A\t]
return name[algorithm-1]; P4\{be>e
} 4yZ'+\ +I
s!lLdR[g
public static void sort(int[] data, int algorithm) { %NyV2W=~X
impl[algorithm-1].sort(data); 3CKd[=-Z
} @Feusprs
I "8:IF
public static interface Sort { <N4)X"s
public void sort(int[] data); *\-R&8
} asT/hsSNS
{2A| F{7>
public static void swap(int[] data, int i, int j) { rNi]|)-ET
int temp = data; $ 8"we
data = data[j]; a\K__NCrX
data[j] = temp; .J/x@
} kiah,7V/
} z;c~(o@4