[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; ^$?8!WE
} tG%R_$*
int i1=l; yv$MQ~]
int i2=mid+1; P-+^YN,
for(int cur=l;cur<=r;cur++){ ffE%{B?
if(i1==mid+1) M{~eI
data[cur]=temp[i2++]; m#8}!u&
else if(i2>r) Z>CFH9
data[cur]=temp[i1++]; qIb(uF@l"
else if(temp[i1] data[cur]=temp[i1++]; /JveN8L%
else ORfA]I-u
data[cur]=temp[i2++]; D+ jk0*bJ
} &1w,;45
} Dtr'X@U
SxOM@A
} U(J?Q
#jDO?Y Sa
改进后的归并排序: ?.4.Ubc\
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package org.rut.util.algorithm.support; Ef?_d]
f5sk,Z
import org.rut.util.algorithm.SortUtil; \OY2|
4<LRa=XT$
/** JVXBm]
* @author treeroot .(`u'G=
* @since 2006-2-2 :;7qup
* @version 1.0 &JF^a
*/ sZB$+~.:}
public class ImprovedMergeSort implements SortUtil.Sort { g$]9xn#_[
%/sf#8^m
private static final int THRESHOLD = 10; V}aXS;(r%
TF{ xFb)
/* xNm<` Y?
* (non-Javadoc) C w$y
* y<#y3M!\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7J')o^MG
*/ ^l iyWl
public void sort(int[] data) { b,{?+8
int[] temp=new int[data.length]; )IhI~,0Nmj
mergeSort(data,temp,0,data.length-1); 8E$KR:/:4
} {v2Q7ZO-
U` bvv'38#
private void mergeSort(int[] data, int[] temp, int l, int r) { a{H~>d<?
int i, j, k; ]54V9l:
int mid = (l + r) / 2; e`C'5`d]
if (l == r) -M(:z
return; -5E%f|U
if ((mid - l) >= THRESHOLD) ;=_KLG <
mergeSort(data, temp, l, mid); .Mm8\].
else .@xwl}o$OL
insertSort(data, l, mid - l + 1); dIK!xOStA
if ((r - mid) > THRESHOLD) lRentNg0b
mergeSort(data, temp, mid + 1, r); T>L6 X:d
else 1_yUv7uhX
insertSort(data, mid + 1, r - mid); *S<>_R 8
R%b,RH#
for (i = l; i <= mid; i++) { .|_+>){$w
temp = data; ]Nm_<%lT
} g*!2.P
for (j = 1; j <= r - mid; j++) { UT>\u
temp[r - j + 1] = data[j + mid]; >.zk-`>-
} ~ZL}j+L/
int a = temp[l]; T!J\Dm-
int b = temp[r]; rTK/WZs8
for (i = l, j = r, k = l; k <= r; k++) { N?R1;|Z]
if (a < b) { h-#Glse<
data[k] = temp[i++]; jJg 'Y:K9q
a = temp; 2uU~$7~N
} else { >#xpg&2x
data[k] = temp[j--]; 4qiG>^h9
b = temp[j]; f{ENSUtCrR
} ~6{;3"^<
} QT?fp >'
} N}zQ)]xz+r
qhiQ!fMQ
/** Ugrcy7
* @param data +&Sf$t 1
* @param l ?JtFiw
* @param i H|Q)Tp Lk
*/ UB(Q &U_
private void insertSort(int[] data, int start, int len) { =yvyd0|35
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "(T@*"vX2
} IO|">a6
} @S<=Okrlj
} \ $z.x-U
} |=,V,*"
+KXg&A/^
堆排序： ZZ?=^g
jjEkz 5
package org.rut.util.algorithm.support; s+o/:rrxY
P\N$TYeH
import org.rut.util.algorithm.SortUtil; RLecKw&1{3
T%?<3/Ev!
/** 9cX ~
* @author treeroot [2.pZB
* @since 2006-2-2 d%5QEVV
* @version 1.0 C6:<.`iD87
*/ sf7'8+wj>
public class HeapSort implements SortUtil.Sort{ j<wWPv
om9fg66
/* (non-Javadoc) Z!7#"wO9+V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j`ggg]"&$
*/ }3 RqaIY}
public void sort(int[] data) { ES}@mO
MaxHeap h=new MaxHeap(); IHMZE42
h.init(data); z(K[i?&
for(int i=0;i h.remove(); rh?!f(_@
System.arraycopy(h.queue,1,data,0,data.length); \oLRNr[F
} ub0]nov
L]9uY
private static class MaxHeap{ TZ?va@2
N-4LdC
void init(int[] data){ lrU}_`
this.queue=new int[data.length+1]; VQ{}S $jQ
for(int i=0;i queue[++size]=data; )9{?C4NQ
fixUp(size); s>76?Q:i
} &tkkn2t
} i~PN(h
xaAJ>0IM
private int size=0; rhHX0+
a UAPh
private int[] queue; tB8XnO_c
!2>gC"$nv
public int get() { .~4%TsBaY
return queue[1]; 9 k)?-
} <RKh%4#~
,a~- (@
public void remove() { p&_Kb\}U
SortUtil.swap(queue,1,size--); 2_ <
fixDown(1); /E@LnKe
} My&h{Qk
file://fixdown tE/j3
private void fixDown(int k) { M#IGq
int j; 6~ev5SD;f
while ((j = k << 1) <= size) { Xd!=1::
if (j < size %26amp;%26amp; queue[j] j++; #(?EL@5
if (queue[k]>queue[j]) file://不用交换 *+vS f7
break; hS OAjS
SortUtil.swap(queue,j,k); (B.J8`h }
k = j; {()8 Wr
} wBTnI>l9[
} J'sVT{@GS
private void fixUp(int k) { wv #1s3
while (k > 1) { 5Y"JRWC
int j = k >> 1; Ie`kzssM
if (queue[j]>queue[k]) AA:Ch?
break; =1!wep"
SortUtil.swap(queue,j,k); ?dVF@
k = j; }b~;x6
} Wo<zvut8
} -\:pbR
m,K0BL
} m jC6(?V
`r &IA
} S^HuQe!#
Q+*o-
SortUtil： ]O3[Te
2VyLt=mdh
package org.rut.util.algorithm; MR=>DcR
eNY$N_P
import org.rut.util.algorithm.support.BubbleSort; }rz}>((ZHF
import org.rut.util.algorithm.support.HeapSort; c!AGKc
import org.rut.util.algorithm.support.ImprovedMergeSort; /m%i"kki
import org.rut.util.algorithm.support.ImprovedQuickSort; -)(HG)3
import org.rut.util.algorithm.support.InsertSort; {x40W0
import org.rut.util.algorithm.support.MergeSort; *`YR-+0
import org.rut.util.algorithm.support.QuickSort; h`F8GNx(
import org.rut.util.algorithm.support.SelectionSort; &ok2Xw
import org.rut.util.algorithm.support.ShellSort; !U>711$
dWwh?{n
/** V)V\M6
* @author treeroot ?ntyF-n&
* @since 2006-2-2 )=V0
* @version 1.0 @jAuSBy
*/ i{?uIb B
public class SortUtil { ^P >; %
public final static int INSERT = 1; Ho9 a#9
public final static int BUBBLE = 2; 23BzD^2a
public final static int SELECTION = 3; RR>Q$K
public final static int SHELL = 4; Q9=X|
public final static int QUICK = 5; U@x5cw:
public final static int IMPROVED_QUICK = 6; C vfm ,BL
public final static int MERGE = 7; M^DYzJ
public final static int IMPROVED_MERGE = 8; Q"n|<!DN
public final static int HEAP = 9; p@!{Sh
z)I.^
public static void sort(int[] data) { gF+Uj( d
sort(data, IMPROVED_QUICK); &$ZJfHD@
} %GQPiWu
private static String[] name={ RI9&KS
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" eS{lr4-]
}; (9$z+Zmm?
&[ejxK"
private static Sort[] impl=new Sort[]{ Sa7bl~p\
new InsertSort(), *J,VvO9
new BubbleSort(), EUevR/S
new SelectionSort(), wGD*25M7$
new ShellSort(), XgE\q
new QuickSort(), 4/e|N#1`;[
new ImprovedQuickSort(), U[1Rw6
new MergeSort(), 77?/e^K\S
new ImprovedMergeSort(), X<{kf-GP
new HeapSort() aGY R:jR$
}; da<B6!
2ZW {
public static String toString(int algorithm){ ,Axk\7-
return name[algorithm-1]; |Xz-rgkQ
} ?Co)7}N
P]w5`aBM
public static void sort(int[] data, int algorithm) { xe9E</M_
impl[algorithm-1].sort(data); x{y}pH"H
} KCEBJ{jM
eU/o I}A
public static interface Sort { h$]=z\=
public void sort(int[] data); ?Vg251-H
} KU:RS+,e;
62BT3/~
public static void swap(int[] data, int i, int j) { ?}p~8{ '
int temp = data; R]L$Ld< ij
data = data[j]; W%Jw\ z=
data[j] = temp; %%d3M->C}
} vl1`s ^}R
} cP8g.+