[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; gcdlT7F)b-
} CGY]r.O*
int i1=l; -f%'
int i2=mid+1; q*_/to
for(int cur=l;cur<=r;cur++){ %oZ6l*
if(i1==mid+1) 925|bX6I
data[cur]=temp[i2++]; }BZ"S-hZ
else if(i2>r) KKiE@_z
data[cur]=temp[i1++]; "B3N*R(["
else if(temp[i1] data[cur]=temp[i1++]; !F A]
else x:),P-~w
data[cur]=temp[i2++]; m[~V/N3
} Xejo_SV&?
} jL%x7?*U0
8Kg n"M3
} j|U#)v/
8ZM&(Lz7u
改进后的归并排序: *K|W /'_&
pA9+Cr!0Q
package org.rut.util.algorithm.support; &7PG.Ff!r
nExU#/*~^
import org.rut.util.algorithm.SortUtil; wO'TBP
YG@t5j#b
/** ^p[rc@+
* @author treeroot ?OcJ)5C4
* @since 2006-2-2 UTH*bL5/J2
* @version 1.0 kCR_tn 4
*/ o4m\~as)Y
public class ImprovedMergeSort implements SortUtil.Sort { k5:G-BQ:
9 Vkb>yFX'
private static final int THRESHOLD = 10; Nl^;A><u
6$kqaS##
/* $c0h.t
* (non-Javadoc) e+~\+:[?
* ,]46I.]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4]?<hH9
*/ a%kQl^I4
public void sort(int[] data) { gp>3I!bo[K
int[] temp=new int[data.length]; g)#W>.Asd
mergeSort(data,temp,0,data.length-1); (7*%K&x
} ,w{e
&;^YBW:I
private void mergeSort(int[] data, int[] temp, int l, int r) { Fv~20G(O
int i, j, k; <0b)YJb4M
int mid = (l + r) / 2; c~z82iXNO
if (l == r) l`oZ)?ur
return; )bS yB29S
if ((mid - l) >= THRESHOLD) ~Sj9GxTe
mergeSort(data, temp, l, mid); sDPs G5q<
else |TS>hwkI
insertSort(data, l, mid - l + 1); O(fM?4w
if ((r - mid) > THRESHOLD) 7gf05Z'=
mergeSort(data, temp, mid + 1, r); hQYL`Dni
else /]K^ rw[
insertSort(data, mid + 1, r - mid); a1EOJ^}0
&"yx<&c}
for (i = l; i <= mid; i++) { y0sR6TY)f
temp = data; T|nDTezr
} z@!`:'ak
for (j = 1; j <= r - mid; j++) { $"+djI?E9
temp[r - j + 1] = data[j + mid]; ULs\+U
} 1oR7iD^
int a = temp[l]; Zq+v6fk_Mn
int b = temp[r]; >3p\m
for (i = l, j = r, k = l; k <= r; k++) { [k.tWA,&
if (a < b) { tXNm$Cq.|
data[k] = temp[i++]; fObg3S92
a = temp; bo2H]PL*
} else { A,JmX
data[k] = temp[j--]; u(@$a4z
b = temp[j]; 3@kf@Vf
} SF7\<'4\N
} KaPAa:Q
} ,]bhyp
Vc 1\i
/** a!a-b~#cx
* @param data ?9!6%]2D
* @param l 2L3)#22m*
* @param i J[l7di5
*/ `g(Y*uCp
private void insertSort(int[] data, int start, int len) { GZEc l'h*
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <CS(c|7
} zwhe
} f86XkECZ;`
} |?!~{-o
} "Lzi+1
p2#)A"
堆排序： p)`{Sos
yMG1XEhuG
package org.rut.util.algorithm.support; (ceNO4"cZ
?:vv50
import org.rut.util.algorithm.SortUtil; RiDJ> 6S
_dqzB$JV
/** ~5NXd)2+Ks
* @author treeroot Zq^At+8+
* @since 2006-2-2 +[M6X} TQ
* @version 1.0 [A~y%bI"
*/ 51#_Vg
public class HeapSort implements SortUtil.Sort{ vx1c,8
'.on)Zd.
/* (non-Javadoc) B-xGX$<z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p, h9D_
*/ E%yNa]\P
public void sort(int[] data) { %aHB"vi6
MaxHeap h=new MaxHeap(); 2y//'3[
h.init(data); SON-Z"v
for(int i=0;i h.remove(); +NeOSQSj
System.arraycopy(h.queue,1,data,0,data.length); (uXL^oja
} rV2WnAb[H&
]s]vZ
private static class MaxHeap{ )P%ZA)l%_o
lG9bLiFY
void init(int[] data){ eX?OYDDC0j
this.queue=new int[data.length+1]; Tl%`P_J)-S
for(int i=0;i queue[++size]=data; EMh7z7}Rr
fixUp(size); ERUz3mjA/
} ]_Vx{oT7
} hW%TM3l}
,`|3KE9
private int size=0; y<?kzt
0g +7uGp:
private int[] queue; &TnS4O
>W%EmnLK
public int get() { iIvc43YV%
return queue[1]; ?8I?'\F;
} zkt+7,vI
<->{
public void remove() { R]vV*
SortUtil.swap(queue,1,size--); KxI&G%z
fixDown(1); O(#)m>A
} &T+atL`N
file://fixdown %D UH@j
private void fixDown(int k) { F5LuSy+v
int j; l>2E (Y|
while ((j = k << 1) <= size) { $~~Jw]
if (j < size %26amp;%26amp; queue[j] j++; p2Z?T}fa}&
if (queue[k]>queue[j]) file://不用交换 "An,Q82oHf
break; }QN1|mP2
SortUtil.swap(queue,j,k); JUsQ,ETn
k = j; >NO[UX%yP
} D|lzGt
} Y#]+Tm(+
private void fixUp(int k) { 5 f@)z"j
while (k > 1) { ?L5zC+c!
int j = k >> 1; pf2[,v/
if (queue[j]>queue[k]) b[sx_b
break; XtXEB<4Z
SortUtil.swap(queue,j,k); qaqBOHI6G
k = j; ]S&&|Fc
} i)o2klIkB
} ."TxX.&HE
J &o|QG
} cW~}:;D4
|+"<wEKI
} T]R|qlZ
5/q}`T9i%7
SortUtil： sz5MH!/PJ
fWCo;4<5?
package org.rut.util.algorithm; x5|I
%G3h?3
import org.rut.util.algorithm.support.BubbleSort; FGPB:
import org.rut.util.algorithm.support.HeapSort; a_[Eh fE
import org.rut.util.algorithm.support.ImprovedMergeSort; *]. 7dec/
import org.rut.util.algorithm.support.ImprovedQuickSort; sWQfr$^A
import org.rut.util.algorithm.support.InsertSort; `uq8G
import org.rut.util.algorithm.support.MergeSort; A;G;^s
import org.rut.util.algorithm.support.QuickSort; @d^Grm8E
import org.rut.util.algorithm.support.SelectionSort; F;>V>" edl
import org.rut.util.algorithm.support.ShellSort; u~r=)His
>L|;|X!m9\
/** @+;$jRwq
* @author treeroot @v$Y7mw3D
* @since 2006-2-2 bo<~jb{
* @version 1.0 q?,).x nN
*/ kJWn<5%ayg
public class SortUtil { K}2Erm%A@y
public final static int INSERT = 1; (ScxLf=]
public final static int BUBBLE = 2; qBU-~"2t
public final static int SELECTION = 3; hMzs*gK
public final static int SHELL = 4; x* DarSk
public final static int QUICK = 5; g6W)4cC8a
public final static int IMPROVED_QUICK = 6; S_iMVHe
public final static int MERGE = 7; )r';lGh2#
public final static int IMPROVED_MERGE = 8; "C?#SO B
public final static int HEAP = 9; BmBj7
"MxnFeLM#
public static void sort(int[] data) { Okgv!Nt8)A
sort(data, IMPROVED_QUICK); w _u\pa
} rJd,Rdt.
private static String[] name={ NnO~dRx{
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" cy*?&~;
}; Q.bXM?V)
A_n7w
private static Sort[] impl=new Sort[]{ Pih tf4i
new InsertSort(), !y#"l$"xK
new BubbleSort(), <3(LWxw
new SelectionSort(), uvgdY
new ShellSort(), h}-3\8 >
new QuickSort(), 1ofKt=|=
new ImprovedQuickSort(), |o,YCzy|5
new MergeSort(), SD#]$v
new ImprovedMergeSort(), M])ZK
new HeapSort() %/EVUN9=
}; < |e,05aM
p$SX
public static String toString(int algorithm){ r)qnl9?;`]
return name[algorithm-1]; JgG$?n\
} agkA}O
5NBV[EP
public static void sort(int[] data, int algorithm) { U6=..K!q
impl[algorithm-1].sort(data); \%u3
} &9/O!3p)
b>_o xK
public static interface Sort { #1J &7F1
public void sort(int[] data); Yi .u"sh]
} TPVVck-T8
BMhy=+\
public static void swap(int[] data, int i, int j) { [vge56h
int temp = data; U -Y03
data = data[j]; AUeu1(
data[j] = temp; <m:m &I 8@
} 7}1~%:6
} ;sfb4x4