[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; .bRDz:?j
} bHzH0v]:
int i1=l; CraD
int i2=mid+1; v0pev;C
for(int cur=l;cur<=r;cur++){ x!?$y_t
if(i1==mid+1) 0j' Xi_uM
data[cur]=temp[i2++]; E/>kvs%
else if(i2>r) 5d)\Z0s
data[cur]=temp[i1++]; `EVy
else if(temp[i1] data[cur]=temp[i1++]; l?x'R("{
else L@G~9{U>
data[cur]=temp[i2++]; ;\Pq
} Z. xOO|
} u#$sO;8s
difAQ<`
} Cs^'g'
v%E!
改进后的归并排序: aR%E"P-6l
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package org.rut.util.algorithm.support; "^VPe[lA
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import org.rut.util.algorithm.SortUtil; fZxEE~Q1
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/** *k;%H'2g{}
* @author treeroot QU)AgF[
* @since 2006-2-2 7x(z
* @version 1.0 -Vjrh/@
*/ Tpp?(lT7r
public class ImprovedMergeSort implements SortUtil.Sort { L:UPS&)
Pbakw81!~
private static final int THRESHOLD = 10; NH8\&#}nAK
<e-hR$
/* n%ZOR1u)k#
* (non-Javadoc) [nB4s+NX
* @t3&#I}mc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )'$'?Fn
*/ )"Dl,Fig:/
public void sort(int[] data) { q_h/zPuH'
int[] temp=new int[data.length]; <+p{U(
mergeSort(data,temp,0,data.length-1); EN@<z;
} OZ Hfd7K4A
""_%u'7t5I
private void mergeSort(int[] data, int[] temp, int l, int r) { HP[M"u
int i, j, k; T^ RYN
int mid = (l + r) / 2; 7[YulC-pH
if (l == r) nztnU9OG
return; p-2PC{% t|
if ((mid - l) >= THRESHOLD) ]4)$dQ59
mergeSort(data, temp, l, mid); - ]U2G:
else xn2f!\%p
insertSort(data, l, mid - l + 1); l1"*
if ((r - mid) > THRESHOLD) y-@{
mergeSort(data, temp, mid + 1, r); HH7Bg0=(
else 4inMd![
insertSort(data, mid + 1, r - mid); e!1am%aE
!sh>`AF
for (i = l; i <= mid; i++) { ,h* 'Cs04h
temp = data; 70T{tB
} Q>l5:2lq
for (j = 1; j <= r - mid; j++) { G"F:68
temp[r - j + 1] = data[j + mid]; N/r8joi#
} aQL$?,
int a = temp[l]; ^7V{nT@H3
int b = temp[r]; $5J~4B"%3
for (i = l, j = r, k = l; k <= r; k++) { I{uwT5QT-
if (a < b) { H.!\j&4j
data[k] = temp[i++]; Bx ru7E"
a = temp; Og9:MFI
} else { =g$>]AE
data[k] = temp[j--]; }/.GB5Ej
b = temp[j]; w8(z\G_0
} E)Cdw%}^
} [D<"qT^*z6
} ?9:~d#p
2D'$
/** 3 UG UZ
* @param data e c4vX
* @param l .v_-V?7
* @param i *dX 7
*/ t4r%EP|Zt
private void insertSort(int[] data, int start, int len) { U6LENY+Ja
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); oaM3#QJ
} |HA1.Y=
} 1t< nm)
} |)b:@q3k+n
} lD@`xq.M;
;&ypvKG
堆排序： )LjW=;(b
'XW9+jj)/
package org.rut.util.algorithm.support; e>!=)6[*
p[7?0 (
import org.rut.util.algorithm.SortUtil; =~ [RG
n>?eTlO3
/** j5bp)U
* @author treeroot "|<U`3y6
* @since 2006-2-2 {# Vp`ji
* @version 1.0 G^qt@,n$;
*/ 2rG$.cGN"
public class HeapSort implements SortUtil.Sort{ ^#)]ICV
whh#J (
/* (non-Javadoc) @Avve8S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d3tr9B
*/ @$!rgLyL[
public void sort(int[] data) { sJ5Ws%q
MaxHeap h=new MaxHeap(); J6RzN'j
h.init(data); ,^uQw/
for(int i=0;i h.remove(); Q> J9M`a
System.arraycopy(h.queue,1,data,0,data.length); }C<$q
} 9UE)4*5
7~m[:Eg6[s
private static class MaxHeap{ 7'idjcR
) S,f I
void init(int[] data){ *8I &|)x
this.queue=new int[data.length+1]; ISi^BFU
for(int i=0;i queue[++size]=data; ]Wx?k7T
fixUp(size); 0artR~*}
} g&?{^4t]
} l$g \t]
o&:'MwU
private int size=0; F6gU9=F1<
.r\|9 *j<
private int[] queue; /xw}]Fa5
G:i>MJbxT
public int get() { rIQ%X`Y
return queue[1]; D/bF
} ,qT+Vqpr{
Vi'zSR28Z
public void remove() { !YENJJ
SortUtil.swap(queue,1,size--); cN%@ nW0i
fixDown(1); KK, t!a
} _o'a|=Osx>
file://fixdown g1&>.V}!
private void fixDown(int k) { pmgPBiU>
int j; ~UQXt r
while ((j = k << 1) <= size) { LW!>_~g-
if (j < size %26amp;%26amp; queue[j] j++; %abc-q
if (queue[k]>queue[j]) file://不用交换 v?(z4oOD/>
break; Ff&kK5}q
SortUtil.swap(queue,j,k); >.&E-1[+:
k = j; A&D<}y/%
} Czb:nyRj
} V2>+s y
private void fixUp(int k) { e>g>)!F
while (k > 1) { !v<`^`x9I
int j = k >> 1; - `{T?
if (queue[j]>queue[k]) usR+ZQaA
break; c;.jo?RR2
SortUtil.swap(queue,j,k); 4n6t(/]b<
k = j; ,C0D|q4/!.
} 2U@:.S'K
} =hi{J M
qijQRxS
} ,Rdw]O
!24PJ\~I
} /Csk"IfuO
S9%ZeM+
SortUtil： @K1'Q!S*
PC3?eS}
package org.rut.util.algorithm; 3@wio[
l4*vM
import org.rut.util.algorithm.support.BubbleSort; _0"s6D$
import org.rut.util.algorithm.support.HeapSort; bi[g4,`Z;
import org.rut.util.algorithm.support.ImprovedMergeSort; @|D#lBm
import org.rut.util.algorithm.support.ImprovedQuickSort; [,sm]/Xlc
import org.rut.util.algorithm.support.InsertSort; jr/IU=u*v
import org.rut.util.algorithm.support.MergeSort; "P yG;N!W
import org.rut.util.algorithm.support.QuickSort; wWQt
import org.rut.util.algorithm.support.SelectionSort; 1xjWD30
import org.rut.util.algorithm.support.ShellSort; z-_$P)[c
~Z' /b|x<3
/** ~- eB
* @author treeroot E?S
* @since 2006-2-2 ^j7>Ul,
* @version 1.0 *JF7 B
*/ `Gh J)WA<
public class SortUtil { pU1miA '
public final static int INSERT = 1; ;e6L@)dp9
public final static int BUBBLE = 2; ca<OG;R^
public final static int SELECTION = 3; DdqE6qE
public final static int SHELL = 4; .S[M:<<*
public final static int QUICK = 5; zE+^WeH|
public final static int IMPROVED_QUICK = 6; =rA]kGx
public final static int MERGE = 7; [@Mo3]#\
public final static int IMPROVED_MERGE = 8; m>djoe
public final static int HEAP = 9; @]etW>F_
kQD~v+u{`
public static void sort(int[] data) { $bl<mG%#9
sort(data, IMPROVED_QUICK); -+[~eqRB
} lC@wCgc
private static String[] name={ `*3;sq%`
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" x27$h)R0v
}; ;$3epP
T_[
private static Sort[] impl=new Sort[]{ NZz^*Ela
new InsertSort(), hWi2S!*Y
new BubbleSort(), =#A/d`2 b
new SelectionSort(), M1T.
new ShellSort(), L+eK)Q
new QuickSort(), KHGUR(\Rd6
new ImprovedQuickSort(), o)$eIu}Wg
new MergeSort(), 8VuLL<\|
new ImprovedMergeSort(), 0k4XVd+Nv
new HeapSort() 1QnaZhu'
}; ):A.A,skf
_;:_ !`
public static String toString(int algorithm){ ` k(Q:
return name[algorithm-1]; nc1?c1s,f
} vZs~=nfi#|
P>^$X
public static void sort(int[] data, int algorithm) { "z=~7g
impl[algorithm-1].sort(data); t:xTmK&vt
} 8 qZbsZi4
O@w_"TJP/z
public static interface Sort { PWquu`
public void sort(int[] data); u9u'5xAO
} ] mK{E~Zll
}SyK)W5Y
public static void swap(int[] data, int i, int j) { THB[(3q
int temp = data; zU!d(ge.E
data = data[j]; 7!)VOD8Z
data[j] = temp; l.Z+.<@
} y,@yaM}-/K
} . ~a~(|