[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; ]Y6cwZOe
} 7g=2Z[o
int i1=l; N#V.1<Y
int i2=mid+1; 2 &/v]
for(int cur=l;cur<=r;cur++){ !f>d_RG
if(i1==mid+1) 0.$hn
data[cur]=temp[i2++]; dca;'$
else if(i2>r) I{JU-Jk|
data[cur]=temp[i1++]; K]/4qH$:
else if(temp[i1] data[cur]=temp[i1++]; ERwHLA
else c,so`I3rI
data[cur]=temp[i2++]; s,bERN7'yO
} *vgl*k?)
} s &Dg8$
KKA~#iCk
} iu**`WjI\
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改进后的归并排序: ,Vd\m"K{
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package org.rut.util.algorithm.support; GdB.4s^
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import org.rut.util.algorithm.SortUtil; [{4MR%--
|+ N5z
/** %h1N3\y9i(
* @author treeroot I%|>2}-_U
* @since 2006-2-2 dd2[yKC`
* @version 1.0 HM>lg`S
*/ 9a'-Y
public class ImprovedMergeSort implements SortUtil.Sort { R.7:3h
6y%0`!
private static final int THRESHOLD = 10; zf3v5Hk
2Q;9G6p
/* Qf@I)4'
* (non-Javadoc) zMIT}$L
* kyR*D1N&)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .ROznCe}
*/ %;#^l+UB
public void sort(int[] data) { aq7~QX_0G
int[] temp=new int[data.length]; @FdSFQ/9
mergeSort(data,temp,0,data.length-1); Em[DHfu1Q
} u!1{Vt87
a>\vUv*
private void mergeSort(int[] data, int[] temp, int l, int r) { vb9OonE2
int i, j, k; UH7jP#W%=
int mid = (l + r) / 2; -OSa>-bzNx
if (l == r) J>d.dq>r
return; V I% 6.6D
if ((mid - l) >= THRESHOLD) 0!v->Dk
mergeSort(data, temp, l, mid); x@8a''
else h gJ[LU|>
insertSort(data, l, mid - l + 1); ybp -$e
if ((r - mid) > THRESHOLD) tHLrhH<w
mergeSort(data, temp, mid + 1, r); `est|C '+
else VK@!lJu!
insertSort(data, mid + 1, r - mid); w3jO6*_ M
k4 F"'N
for (i = l; i <= mid; i++) { .F+@B\A<
temp = data; uwlr9nB
} /dnCwFXf
for (j = 1; j <= r - mid; j++) { YJ$1N!rG
temp[r - j + 1] = data[j + mid]; 3_A *$
} 4tY ss
int a = temp[l]; H#ClIh?'b
int b = temp[r]; ,AT[@
for (i = l, j = r, k = l; k <= r; k++) { v+99 -.
if (a < b) { vm>b m
data[k] = temp[i++]; J4Dry<
a = temp; O*#*%RL|
} else { 4j)tfhwd8
data[k] = temp[j--]; o.I6ulY8
b = temp[j]; (Cqn6dWK
} hpU2
} Ewg:HX7<(
} DK}"b}Fvq
;J7F J3n
/** GgKEP,O
* @param data 23gPbtq/
* @param l <tioJG{OT
* @param i u{L!n$D7
*/ =FD;~
private void insertSort(int[] data, int start, int len) { }NB}"%2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); -lv)tHs<
} S{3nM<
} ZRYEqSm
} 7B?c{
} Wl}&?v&@
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堆排序： f7}*X|_Y
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package org.rut.util.algorithm.support; [+P#tIL
h yv2SxP*
import org.rut.util.algorithm.SortUtil; ]LM-@G+Jz
Q%f|~Kl-hd
/** TiH)5
* @author treeroot n93=8;&
* @since 2006-2-2 p'om-
* @version 1.0 Fgh]KQ/5
*/ ]~3U
public class HeapSort implements SortUtil.Sort{ LCQE_}Mh
[pM V?a[
/* (non-Javadoc) VJS8)oI~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LcE+GC
*/ twx[s$O'b
public void sort(int[] data) { (IPY^>h
MaxHeap h=new MaxHeap(); XO'l Nb.
h.init(data); Ox@P6|m
for(int i=0;i h.remove(); *2GEnAZb7n
System.arraycopy(h.queue,1,data,0,data.length); [n/hkXa$\
} [ I/<_AT#
x+]\1p
private static class MaxHeap{ Y&K;l_
F,'exuZ
void init(int[] data){ x)_0OR2lkp
this.queue=new int[data.length+1]; Cn[0(s6
for(int i=0;i queue[++size]=data; ^53r/V}%
fixUp(size); Kde9 $
} +k>.Q0n%m
} ZGd!IghL
<Z/x,-^*<
private int size=0; Ft!],n-n*
"V}[':fen
private int[] queue; 2J;kSh1,L
rX1QMR7?
public int get() { B9J&=6`)
return queue[1]; LA)[ip4
} Tq4-wE+
5;{H&O9Q
public void remove() { pt}X>ph{
SortUtil.swap(queue,1,size--); EEW_gFn
fixDown(1); k Zq!&
} -bU oCF0
file://fixdown @W9x$
private void fixDown(int k) { BGu?<bET
int j; N~xLu8,
while ((j = k << 1) <= size) { Vkc#7W(
if (j < size %26amp;%26amp; queue[j] j++; ,11H.E Z
if (queue[k]>queue[j]) file://不用交换 _:"<[ >9
break; W}]%X4<#rN
SortUtil.swap(queue,j,k); "l*`>5Nn9
k = j; (/j); oSK
} Ck|8qUz-
} t0T"@t#c
private void fixUp(int k) { 6}oXP_0U
while (k > 1) { >cCR2j,r
int j = k >> 1; <|Pun8j
if (queue[j]>queue[k]) PxS8 n?y
break; I=NZokfS
SortUtil.swap(queue,j,k); +@/"%9w
k = j; X<%Q"2hW
} '&|=0TDd+
} A`}rqhU.{-
^~A>8CQOU
} byfJy^8G
Q(oN/y3,
} ~7zGI\=P@
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SortUtil： }-6)gWe
6 jn3`D
package org.rut.util.algorithm; Pw61_ZZ4B\
5qP:/*+
import org.rut.util.algorithm.support.BubbleSort; EL9]QI
import org.rut.util.algorithm.support.HeapSort; ML>[^F
import org.rut.util.algorithm.support.ImprovedMergeSort; fk x \=
import org.rut.util.algorithm.support.ImprovedQuickSort; `p;I}
import org.rut.util.algorithm.support.InsertSort; O|M{-)
import org.rut.util.algorithm.support.MergeSort; H"dJ6
import org.rut.util.algorithm.support.QuickSort; y`XU~B)J1
import org.rut.util.algorithm.support.SelectionSort; x" L20}
import org.rut.util.algorithm.support.ShellSort; PJL=$gBgKk
07^iP>?
/** X'qU*Eo
* @author treeroot _ "VkGG
* @since 2006-2-2 n@,G8=J?
* @version 1.0 7w6cwHrL@
*/ csW43&
public class SortUtil { PIwFF}<(
public final static int INSERT = 1; _zwG\I|Q
public final static int BUBBLE = 2; <t \H^H!
public final static int SELECTION = 3; u;/ Vyu
public final static int SHELL = 4; 65aK2MS@
public final static int QUICK = 5; TmV,&['mg
public final static int IMPROVED_QUICK = 6; xM&Wgei]10
public final static int MERGE = 7; /VN f{p
public final static int IMPROVED_MERGE = 8; CyXRi}W.
public final static int HEAP = 9; v63"^%LX
EKsT~SS
public static void sort(int[] data) { M 4?ig}kh
sort(data, IMPROVED_QUICK); &RnTzqv
} m4l& eEp
private static String[] name={ &b%zQ4%d-`
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Z*= $8e@
}; 9E>|=d|(d
L'0B$6
private static Sort[] impl=new Sort[]{ [J4gH^Z_
new InsertSort(), Ke2ccN
new BubbleSort(), .xm.DRk3
new SelectionSort(), [Q/TlOt5
new ShellSort(), m;GbLncA
new QuickSort(), [k;\SXDZo
new ImprovedQuickSort(), <#u=[_H
new MergeSort(), }n3/vlW9
new ImprovedMergeSort(), G?;e-OhV
new HeapSort() |n,<1QY
}; O\"3J(y,
fj;y}t1E]
public static String toString(int algorithm){ pH"#8O&
return name[algorithm-1]; %B5wH_p
} ?7.7`1m!v
c*L0@Ak%
public static void sort(int[] data, int algorithm) { ~l]ve,W[
impl[algorithm-1].sort(data); 8{^WY7.'
} ,0~n3G
uF9C-H@:
public static interface Sort { %}Ss,XJ
public void sort(int[] data); @M_oH:GV
} Af'" 6BS
p8h9Ng*&`
public static void swap(int[] data, int i, int j) { w1OI4C)~
int temp = data; "AnC?c9?-^
data = data[j]; N`L0Vd
data[j] = temp; FtfKe"qw
} w&o&jAb-M
} pgE}NlW