[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; q+vx_4
} AD<q%pu&H?
int i1=l; 1wP-
int i2=mid+1; ,5*eX
for(int cur=l;cur<=r;cur++){ ^:Gie
if(i1==mid+1) E0?iXSJ
data[cur]=temp[i2++]; a)'5Nw9*
else if(i2>r) UTH_^HAN#G
data[cur]=temp[i1++]; 4sT88lG4n
else if(temp[i1] data[cur]=temp[i1++]; !f+H,]D"
else oczN5YSt
data[cur]=temp[i2++]; C-H@8p?T
} `u&Zrdr,
} gjAIEI
ixT:)|'i
} )}?#
B,=H@[Fj
改进后的归并排序: /x1![$oC0
&mtJRfnu
package org.rut.util.algorithm.support; HI11Jl}{
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import org.rut.util.algorithm.SortUtil; KW^7H
9AJ7h9L
/** q*7VqB
* @author treeroot -#HA"7XOE
* @since 2006-2-2 ]@Uq=?%
* @version 1.0 |VNnOM
*/ nPy$D-L,
public class ImprovedMergeSort implements SortUtil.Sort { _<OSqE
vG"=h%
private static final int THRESHOLD = 10; uD@#
DS[#|
/* n@,G8=J?
* (non-Javadoc) e8#h3lxJ`
* x}8yXE"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L|}lccpI
*/ \hEN4V[
public void sort(int[] data) { o_^?n[4
int[] temp=new int[data.length]; J\M>33zu
mergeSort(data,temp,0,data.length-1); 7*Ej. HK
} VN\W]jT
aN8|J?JH
private void mergeSort(int[] data, int[] temp, int l, int r) { DuHu\>f<S
int i, j, k; ?qWfup\S
int mid = (l + r) / 2; l.NEkAYPmH
if (l == r) L$E{ycn
return; 8Hn|cf0
if ((mid - l) >= THRESHOLD) #kaY0M
mergeSort(data, temp, l, mid); T, )__h
else 428>BQA
insertSort(data, l, mid - l + 1); |='z{WS
if ((r - mid) > THRESHOLD) z-.+x3&o @
mergeSort(data, temp, mid + 1, r); 6U R2IxbE
else [c|]f_ZdK
insertSort(data, mid + 1, r - mid); +w{*Xk)4
\S!e![L/
for (i = l; i <= mid; i++) { wlqpn(XR
temp = data; esMX-.8Cx
} ap+JQ@b
for (j = 1; j <= r - mid; j++) { Z*= $8e@
temp[r - j + 1] = data[j + mid]; x?2@9u8Yb
} R&BTA
int a = temp[l]; L'0B$6
int b = temp[r]; OZ~5*v
for (i = l, j = r, k = l; k <= r; k++) { %~E ?Z!_W
if (a < b) { UZJCvfi
data[k] = temp[i++]; \Yc'~2n
a = temp; 0,89H4
} else { V#S9H!hm$
data[k] = temp[j--]; \(^nSy&N
b = temp[j]; 5a|w+HO,
} h1B16)
} r[b(I@T+
} SfaQvstN
$4 S@
/** [nrYpb4
* @param data G?;e-OhV
* @param l f-`)^5E
* @param i 6MT1$7|P&x
*/ Z:sg}
private void insertSort(int[] data, int start, int len) { YH\OFg@7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )\J+Kiy)
} 1Y7Eajt-5
} %R}.#,Suo
} JSCZ{vJ$
} P;qN(2L/=<
q#,f 4P
堆排序： 7G}2,ueI
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package org.rut.util.algorithm.support; IJ(
8{^WY7.'
import org.rut.util.algorithm.SortUtil; %)/P^9I6
;kS&A(
/** ~&7MkkftM
* @author treeroot 06c>$1-?
* @since 2006-2-2 OHb[qX\
* @version 1.0 pgQV/6
*/ 4GY[7^
public class HeapSort implements SortUtil.Sort{ 4'a=pnE$
XF;ES3 d
/* (non-Javadoc) Of[XKFn_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3TY5;6
*/ l0PZ`m+;j
public void sort(int[] data) { ujR_"r|l
MaxHeap h=new MaxHeap(); JNt^ (z
h.init(data); r0+6evU2
for(int i=0;i h.remove(); 6/r)y+H
System.arraycopy(h.queue,1,data,0,data.length); +#lM
} ^h~x)@=
=F]FP5V
private static class MaxHeap{ 7Z\--=;|[:
kt["m.
void init(int[] data){ hRrn$BdLX
this.queue=new int[data.length+1]; XINu=N(g
for(int i=0;i queue[++size]=data; g1W.mAA3B
fixUp(size); #><.oreXq
} V-Sd[
} D(AXk8Vub
C/vIEYG4
private int size=0; AGQ#$fh>7=
%S*{9hm/
private int[] queue; 'rO!AcdLU
WaVtfg$!
public int get() { V'8s8H
return queue[1]; <SgM@0m
} &]v4@%<J
vY${;#~|
public void remove() { R`DKu=
SortUtil.swap(queue,1,size--); Nn~~!q
fixDown(1); jr /pj?
} x7:s]<kE
file://fixdown C)@y5. G;
private void fixDown(int k) { a!<8\vzg
int j; %)|9E>fP]N
while ((j = k << 1) <= size) { bF"G[pD
if (j < size %26amp;%26amp; queue[j] j++; %,6#2X nX%
if (queue[k]>queue[j]) file://不用交换 Sa?ksD2IaB
break; g*e
SortUtil.swap(queue,j,k); 7hlO#PYZ
k = j; Jq&uF*!
} i|w81p^o
} (e!0]Io@
private void fixUp(int k) { }Qip&IN
while (k > 1) { JEahGzO
int j = k >> 1; F+,~v-
if (queue[j]>queue[k]) }z _
break; "$ Y_UJT7
SortUtil.swap(queue,j,k); jkiFLtB@V
k = j; bx{$Y_L+p
} w)kNkD
} 5NS[dQG5
2Ga7$q
} 2ORNi,_I
Z~oo;xE
} Z&1T
P9^-6;'Y
SortUtil： 0-HqPdjR
i'H/ZwU
package org.rut.util.algorithm; n>+mL"hs
ryW'Z{+r'
import org.rut.util.algorithm.support.BubbleSort; Hv sob
import org.rut.util.algorithm.support.HeapSort; &]e'KdXF
import org.rut.util.algorithm.support.ImprovedMergeSort; "?ucO4d
import org.rut.util.algorithm.support.ImprovedQuickSort; !;i`PPRwk
import org.rut.util.algorithm.support.InsertSort; Ox&P}P0f
import org.rut.util.algorithm.support.MergeSort; 8+a4>8[M
import org.rut.util.algorithm.support.QuickSort; s \;"X
import org.rut.util.algorithm.support.SelectionSort; \6E|pbJ}x
import org.rut.util.algorithm.support.ShellSort; !sDh4jQ`
^?0DP>XA
/** PP;}e
* @author treeroot +BVym~*^
* @since 2006-2-2 zLD0RBj7p
* @version 1.0 T (OW
*/ k7?N ?7w
public class SortUtil { }.3nthgz
public final static int INSERT = 1; 1|kvPo#
public final static int BUBBLE = 2; ;1`fC@rI
public final static int SELECTION = 3; sYe?M,
public final static int SHELL = 4; R< ,`[*Z
public final static int QUICK = 5; -8eoNzut
public final static int IMPROVED_QUICK = 6; -=)+dCyB^
public final static int MERGE = 7; E*.{=W }C
public final static int IMPROVED_MERGE = 8; e,F1Xi#d
public final static int HEAP = 9; #MX'^RZ>2
=|M>l
public static void sort(int[] data) { ,Sq/y~
sort(data, IMPROVED_QUICK); ohFJZ'
} F~%]6^$w
private static String[] name={ [Sr,h0h6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,uo'c_f(e
}; ?EJD?,}
GN ]cDik
private static Sort[] impl=new Sort[]{ ]ndvt[4L
new InsertSort(), _hRcc"MS`
new BubbleSort(), f!oT65Vmi
new SelectionSort(), %+8F'&X
new ShellSort(), P_?gq>E8
new QuickSort(), ';TT4$(m
new ImprovedQuickSort(), b8V~S'6VqO
new MergeSort(), GNXHM*~
new ImprovedMergeSort(), lG4H:[5V
new HeapSort() tw^,G(
}; :`-,Lbg
u.mJQDTH
public static String toString(int algorithm){ jNLw=
return name[algorithm-1]; YVYu:}e3)
} $}J5xG,}$
}Mf!-g
public static void sort(int[] data, int algorithm) { BGOuDKz9C
impl[algorithm-1].sort(data); v1BDP<qU2
} jT8#C=a7
wF <n=
public static interface Sort { biSz?DJ>
public void sort(int[] data); MaRi+3F
} zo+nq%=
~%^ tB
public static void swap(int[] data, int i, int j) { bu:S:`
int temp = data; +?u~APjNN
data = data[j]; ::ajlRZG
data[j] = temp; PJ]];MQ
} Y' %^NP}o
} )Y2{_ bx4"