[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; mNUc g{+/
} 'fB/6[bd
int i1=l; cEzWIS?pp\
int i2=mid+1; ^}nz^+R
for(int cur=l;cur<=r;cur++){ e]N?{s
if(i1==mid+1) :$eg{IXC"
data[cur]=temp[i2++]; n$>E'oG2t
else if(i2>r) 57:Wh=x
data[cur]=temp[i1++]; >9KQWeD
else if(temp[i1] data[cur]=temp[i1++]; NY]`1yy
else &Z Ja}5k!r
data[cur]=temp[i2++]; )'\pa2
} Q5R7se_
} /y2upu*!
e>"/Uii
} MN|8(f5Gs
b.Wf*I?
改进后的归并排序: |cZKj|0>
I^'U_"vB
package org.rut.util.algorithm.support; n|,kL!++.
'W0?XaEk-
import org.rut.util.algorithm.SortUtil; F,B,D^WD
/*B^@G|]'
/** Mk-C&#'
* @author treeroot z;x1p)(xt
* @since 2006-2-2 y~jKytq^@
* @version 1.0 d9/YW#tm
*/ !Pmv
public class ImprovedMergeSort implements SortUtil.Sort { _SS6@`X
;jb+x5t
private static final int THRESHOLD = 10; enu",wC3
c"mRMDg%
/* B@wQ[
* (non-Javadoc) =\IcUY,4
* ebF},Q(48
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a8fLj
*/ eZ~^Z8F[6
public void sort(int[] data) { mUi|vq)`=D
int[] temp=new int[data.length]; )9@I7QG?
mergeSort(data,temp,0,data.length-1); d7o~$4h|
} -B\`O*Q
],%}}UN
private void mergeSort(int[] data, int[] temp, int l, int r) { H9)$ #r6i
int i, j, k; ?k4O)?28
int mid = (l + r) / 2; uQ9/7"S
if (l == r) GXaCH))TO
return; [ @>8Qhw
if ((mid - l) >= THRESHOLD) l7 D/]&
mergeSort(data, temp, l, mid); ["N>Po
else VHsNz WI
insertSort(data, l, mid - l + 1); AR\1w'
if ((r - mid) > THRESHOLD) ?Mp)F2'
mergeSort(data, temp, mid + 1, r); 3"'|Ql.H
else 2S^xqvh
insertSort(data, mid + 1, r - mid); Nzc1)t=
cXcn}gKV
for (i = l; i <= mid; i++) { B\bIMjXV
temp = data; kl[bDb1p
} M38,SH<
for (j = 1; j <= r - mid; j++) { 'w.:I TJf
temp[r - j + 1] = data[j + mid]; NWB/N*
} $Vp&Vc8
int a = temp[l]; nLkC-+$tM
int b = temp[r]; d; @Kz^
for (i = l, j = r, k = l; k <= r; k++) { ~I/7{B|yX
if (a < b) { +7+ VbsFG
data[k] = temp[i++]; ?"AcK"v
a = temp; ;BoeE3* 6
} else { -GP+e`d
data[k] = temp[j--]; 2!dIW5I
b = temp[j]; Y_PCL9G{p
} ]@ETQ8QN
} ^f!d8 V
} =KT7ZSTV
]-{T-*h:
/** @tjC{?5Y
* @param data l%B1JGu*F
* @param l Q8Usyc'3
* @param i $K<jmEC@<
*/ 2~h)'n7Mw
private void insertSort(int[] data, int start, int len) { /[nt=#+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :'GTCo$3
} oB9Fas!N
} TaM,9MAu
} @b!fs
} nEOhN
pSq\3Hp]Q
堆排序： aDza"Ln
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package org.rut.util.algorithm.support; Y<#7E;aL
$BH0W{S
import org.rut.util.algorithm.SortUtil; C<w9f
zCvR/
/** 'U}i<^,c
* @author treeroot |7%$+g
* @since 2006-2-2 f.+e
* @version 1.0 Zb2 B5(0
*/ qLYv=h$,
public class HeapSort implements SortUtil.Sort{ @gX@mT"
uc7np]Z
/* (non-Javadoc) , is .{y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j?z(fs-
*/ 5-u=ZB%p
public void sort(int[] data) { RFA5vCG
MaxHeap h=new MaxHeap(); 0HxF#SlKM
h.init(data); j1d#\
for(int i=0;i h.remove(); Vi#(x9.
System.arraycopy(h.queue,1,data,0,data.length); U?|s/U
} cW&OVNj
>!WJ{M0
private static class MaxHeap{ NmtBn^t
O~aS&g/sf
void init(int[] data){ lBh {8a|2W
this.queue=new int[data.length+1]; `hH1rw@7<
for(int i=0;i queue[++size]=data; Zqam Iq
fixUp(size); Hh!x&;x}
} T,?^J-h^
} };zF&
e[e2X<&0RT
private int size=0; 2EE#60
FP9ZOoog
private int[] queue; oN _%oc
NWNgh/9?
public int get() { )0d3sJ8
return queue[1]; r2&{R!Fj`
} {h@R\bU
bt j\v[D
public void remove() { !EKF^n6
SortUtil.swap(queue,1,size--); <w,aS;v6jp
fixDown(1); a<\m` Es=
} eN jC.w9
file://fixdown H<FDi{
private void fixDown(int k) { 9'4cqR
int j; f'%}{l: ss
while ((j = k << 1) <= size) { cCj}{=U
if (j < size %26amp;%26amp; queue[j] j++; e|kYu[^
if (queue[k]>queue[j]) file://不用交换 % mIq,
break; 6xj&Qo
SortUtil.swap(queue,j,k); fitm*
k = j; Y8CXinh
} EIf~>AI
} -i;#4@^t
private void fixUp(int k) { +$<m;@mZ
while (k > 1) { 8`*`4m
int j = k >> 1; 4Q!*h8O
if (queue[j]>queue[k]) _ :][{W#
break; U1&m-K
SortUtil.swap(queue,j,k); Z~P5SEg
k = j; $T*kpUXH}
} Cjwg1?^RZ
} 61wGIN2,
<GR]A|P
} `Y'}\>.#
q|Ga
} ]C'r4Ch^
wRWN]Vo
SortUtil： b)`<J @&{
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package org.rut.util.algorithm; ,{]>U'-
N b+zP[C
import org.rut.util.algorithm.support.BubbleSort; i #8)ad
import org.rut.util.algorithm.support.HeapSort; XV!P8n
import org.rut.util.algorithm.support.ImprovedMergeSort; |qZ4h7wL
import org.rut.util.algorithm.support.ImprovedQuickSort; !$&K~>`
import org.rut.util.algorithm.support.InsertSort; H'2pmwk
import org.rut.util.algorithm.support.MergeSort; HPu nNsA
import org.rut.util.algorithm.support.QuickSort; Thz&wH`W
import org.rut.util.algorithm.support.SelectionSort; H!7/U_AH
import org.rut.util.algorithm.support.ShellSort; ?HU(0Vgn'
0 5 `x$f
/** Q?Q!D+~mND
* @author treeroot KZ&8aulP
* @since 2006-2-2 -u8 ma%JW
* @version 1.0 ^Z;5e@S
*/ lKwIlp
public class SortUtil { ])vM# f
public final static int INSERT = 1; BK6oW3wD/
public final static int BUBBLE = 2; &Q 3!ty
public final static int SELECTION = 3; {QJJw}!#
public final static int SHELL = 4; I+ydVj(Op
public final static int QUICK = 5; _18) XR
public final static int IMPROVED_QUICK = 6; ".~,(*
public final static int MERGE = 7; $M#G;W5c
public final static int IMPROVED_MERGE = 8; }zj_Pp
public final static int HEAP = 9; 05$CIS>!
ZC@Pfba[`
public static void sort(int[] data) { AvH^9zEE(
sort(data, IMPROVED_QUICK); -=@d2LY
} 8FU8E2zo
private static String[] name={ p~BEz?e
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;",W&HQbE
}; "V}WV!w
d3<7t
private static Sort[] impl=new Sort[]{ k_/*>lIZY
new InsertSort(), u{o3
new BubbleSort(), EWrIDZi
new SelectionSort(), \0). ODA(
new ShellSort(), :[kfWai#(
new QuickSort(), X0.kQ
new ImprovedQuickSort(), 4hz T4!15
new MergeSort(), #~BsI/m
new ImprovedMergeSort(), f; w\k7 #
new HeapSort() "m4._4U
}; ~}pc&jz>q
FC@h6\+a
public static String toString(int algorithm){ ;G.5.q[A
return name[algorithm-1]; Gh>&+UA'$1
} -n FKP&P
VkdGGY
public static void sort(int[] data, int algorithm) { d<K2 \:P{}
impl[algorithm-1].sort(data); >~:Md
} %;_94!(hC
0Q?)?8_
public static interface Sort { KW-GVe%8f
public void sort(int[] data); sPX&XqWx
} mX 3p
;`Nh@*_
public static void swap(int[] data, int i, int j) { :^7>kJ5?
int temp = data; O,6Wdw3+-3
data = data[j]; ;NU-\<Q{
data[j] = temp; '_d4[Olu
} @<NuuYQ&
} $vrkxn