[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; bsB*533
} :/Q
int i1=l; ,wIONDnLZ
int i2=mid+1; )xbHCoU,
for(int cur=l;cur<=r;cur++){ MrDc$p W G
if(i1==mid+1) AQ_|:
data[cur]=temp[i2++]; 73xAG1D$r
else if(i2>r) +tVaBhd!
data[cur]=temp[i1++]; MFb9H{LA
else if(temp[i1] data[cur]=temp[i1++]; ;~"FLQg@
else Wzw7tLY._
data[cur]=temp[i2++]; rd9e \%A
} =K6($|'=
} MhR:c7,
ig/%zA*Bo
} .Yf:[`Q6g
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改进后的归并排序: (>r[-Bft
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package org.rut.util.algorithm.support; pov)Z):}G<
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import org.rut.util.algorithm.SortUtil; #wV8X`g
](&{:>RNJ
/** NdzSz]q}
* @author treeroot ;`^WGS(3.%
* @since 2006-2-2 kP-3"ACG
* @version 1.0 7PtN?;rP
*/ ;\=M;Zt
public class ImprovedMergeSort implements SortUtil.Sort { zxC#0@qX07
K#pNec
private static final int THRESHOLD = 10; LN@F+CyDc
:E:38q,hG
/* 1`a5C.v
* (non-Javadoc) C!fMW+C@
* \3pc"^W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H[S%J3JI
*/ qYlhlHD
public void sort(int[] data) { paKSr|O
int[] temp=new int[data.length]; fpFhn
mergeSort(data,temp,0,data.length-1); cNM3I,o7
} Y?(r3E^x
pKit~A,Q
private void mergeSort(int[] data, int[] temp, int l, int r) { S/4^ d &Gr
int i, j, k; 0cJWJOj&
int mid = (l + r) / 2; yuat" Pg
if (l == r) @te!Jgu{
return; .=X}cJ]`[
if ((mid - l) >= THRESHOLD) uf&myV7
mergeSort(data, temp, l, mid); [%77bv85.G
else x "^Xj]-
insertSort(data, l, mid - l + 1); ,u`B<heoLU
if ((r - mid) > THRESHOLD) "4uS3h2r
mergeSort(data, temp, mid + 1, r); $`)/0{qY-
else ug+io mZ
insertSort(data, mid + 1, r - mid); MLRK74D
xwJH(_-
for (i = l; i <= mid; i++) { :}@g6
temp = data; E0MGRI"me
} _nbBIaHN{
for (j = 1; j <= r - mid; j++) { `C$:Yf]%nG
temp[r - j + 1] = data[j + mid]; f;1K5Y
} @I_8T$N=
int a = temp[l]; =8; {\
int b = temp[r]; aC%m-m
for (i = l, j = r, k = l; k <= r; k++) { uF1~FKB
if (a < b) { D"ND+*Q[X
data[k] = temp[i++]; b\-&sM(W"
a = temp; f]JM /
} else { K }Vv4x1U
data[k] = temp[j--]; rL+!tH
b = temp[j]; ]3KhgK%c8
} CS==A57I
} li0i"
} ]>~)<
M;p em<
/** @8;W\L$~1
* @param data /J:bWr
* @param l BV>\ McI+
* @param i .pN`;*7`
*/ PDrZY.-
private void insertSort(int[] data, int start, int len) { =gJb^ Gx(w
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ,'p2v)p^4
} \H=&`?
} !+L/Khw/C
} iy14mh\ ~
} ?i06f,-
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堆排序： rmE"rf
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package org.rut.util.algorithm.support; 11<KpxKpk
Bh=u|8yxc
import org.rut.util.algorithm.SortUtil; }T%}wdj
4*e0 hWp
/** ~ ; -! n;
* @author treeroot B:!W$<
* @since 2006-2-2 Z(Bp 0a
* @version 1.0 ~[\_N\rm
*/ jC7&s$>Q"g
public class HeapSort implements SortUtil.Sort{ IFDZfx
? P( ZA
/* (non-Javadoc) BI $
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m3mp/g.>
*/ !!`!|w
public void sort(int[] data) { :j]vf8ec
MaxHeap h=new MaxHeap(); l&?}hq^'Dn
h.init(data); [$ejp>'Ud
for(int i=0;i h.remove(); |b|&XB_<]Z
System.arraycopy(h.queue,1,data,0,data.length); )*,5"CO
} k[HAkB \{
tb$LriN
private static class MaxHeap{ brdmz}
0 0M@
void init(int[] data){ `.x Fiyc
this.queue=new int[data.length+1]; A@sZ14+f
for(int i=0;i queue[++size]=data; |m80]@>
fixUp(size); R +WP0&d'
} ,B0_MDA +
} ^Nmg07_R
A` AaTP
private int size=0; Dg} Ka7H
D,g1<:<
private int[] queue; nSkPM5\TI
jSwf*u
public int get() { o]p|-<I Q
return queue[1]; |Tm!VFd
} pGK;1gVj
DBCK2PlJ
public void remove() { Sp^9&^
SortUtil.swap(queue,1,size--); "V$Bnz\n
fixDown(1); `g6h9GC6
} uvV;Mlo]
file://fixdown v0YG,)_
private void fixDown(int k) { R8T]2?Q1
int j; '*k'i;2/1
while ((j = k << 1) <= size) { !X<~-G2)l
if (j < size %26amp;%26amp; queue[j] j++; mGGsB5#w>
if (queue[k]>queue[j]) file://不用交换 T9u<p=p
break; QNxl/y\l0
SortUtil.swap(queue,j,k); $.GOZqMs
k = j; <]b7ZF]
} a)#1{JaoY
} FDv+*sZ
private void fixUp(int k) { ijdXU8
while (k > 1) { <F.Tx$s
int j = k >> 1; JGH60|
if (queue[j]>queue[k]) DNj"SF(J
break; WN_pd%m
SortUtil.swap(queue,j,k); Hx\H $Y
k = j; h<SQL97N
} Ko/ I#)
} ]sGHG^I6
K%X^n>O7C
} D*YM[sN`
aN $}?
} h?FmBK'BAd
L[20m(6?
SortUtil： qq1-DG
mBG=jI "xh
package org.rut.util.algorithm; BYo/57&:
nYa*b=[.
import org.rut.util.algorithm.support.BubbleSort; -atGlu2
import org.rut.util.algorithm.support.HeapSort; _Jt 2YZdA
import org.rut.util.algorithm.support.ImprovedMergeSort; hwIMn33
import org.rut.util.algorithm.support.ImprovedQuickSort; j~e;DO
import org.rut.util.algorithm.support.InsertSort; OKvPL=~
import org.rut.util.algorithm.support.MergeSort; S:x?6IDPC^
import org.rut.util.algorithm.support.QuickSort; f}@jFhr'<
import org.rut.util.algorithm.support.SelectionSort; (<Th=Fns?
import org.rut.util.algorithm.support.ShellSort; =pk)3<GwF
<@Fy5k-%.
/** N]<!j$pOz
* @author treeroot L
* @since 2006-2-2 ~2zMkVH
* @version 1.0 0sh/|`\
*/ wu4NLgkE
public class SortUtil { NSFs\a@1
public final static int INSERT = 1; ~~6^Sh60g
public final static int BUBBLE = 2; yGsz2T;w
public final static int SELECTION = 3; B-T/V-c7
public final static int SHELL = 4; _"#!e{N|
public final static int QUICK = 5; V2<?ol
public final static int IMPROVED_QUICK = 6; \#>T~.Y7K
public final static int MERGE = 7; /g$G_}
public final static int IMPROVED_MERGE = 8; -#Z bR
public final static int HEAP = 9; `St.+6^J
fS"Hr0
public static void sort(int[] data) { W5'3$,X9
sort(data, IMPROVED_QUICK); .]9c/
} T1r3=Y4
private static String[] name={ jh.@-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" kee|42E
}; f7'q-
D Kw*~0
private static Sort[] impl=new Sort[]{ j$7Xs"
new InsertSort(), F|HJH"2*&q
new BubbleSort(), 6O22P?v
new SelectionSort(), \J6hI\/4^
new ShellSort(), |/|
new QuickSort(), `WOYoec
new ImprovedQuickSort(), yj$TPe_BW
new MergeSort(), ,.o<no
new ImprovedMergeSort(), brZ sAQ+k
new HeapSort() S#-tOjU*
}; F5 ]C{
Z-B%'/.
public static String toString(int algorithm){ v*qQ?S
return name[algorithm-1]; u^j {U}
} MCP "GZK6W
`W-&0|%Ta
public static void sort(int[] data, int algorithm) { [*Z`Kc
impl[algorithm-1].sort(data); ,= &B28Qe)
} n 8pt\i0
_6Eu2|vM&
public static interface Sort { 7'-j%!#w
public void sort(int[] data); !gmH$1w
} kGUJ9Du
fof2 xcH!
public static void swap(int[] data, int i, int j) { Ol')7d&
int temp = data; C P3<1~
data = data[j]; uyF|O/FC
data[j] = temp; \)48904^
} 0liR
} x#N-&baS