[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; Mmj;-u
} edq4D53
int i1=l; F@jZ ho
int i2=mid+1; e`_LEv
for(int cur=l;cur<=r;cur++){ s-!ArB,
if(i1==mid+1) @Ns Qd_e
data[cur]=temp[i2++]; kPG-hD
else if(i2>r) A1$TXr
data[cur]=temp[i1++]; Q~]uC2Mw
else if(temp[i1] data[cur]=temp[i1++]; :K,i\
else Xf]d. :
data[cur]=temp[i2++]; vzAaxk%
} ]L.O8
} 9!\B6=r y4
1z4OI6$Af
} YQvD|x
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改进后的归并排序: 9d659iC
M#6W(|V/
package org.rut.util.algorithm.support; K#d`Hyx
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import org.rut.util.algorithm.SortUtil; zT]8KA
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/** !>&o01i
* @author treeroot ]y'>=a|T
* @since 2006-2-2 w+|L+h3L7
* @version 1.0 *u[BP@vE
*/ B%b4v
public class ImprovedMergeSort implements SortUtil.Sort { hd<c&7|G'
%/.b~|,-
private static final int THRESHOLD = 10; nh>vixe
P l]O\vh
/* _C?hHWSf"
* (non-Javadoc) cp7=epho
* D=Gtq6jd
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,!y$qVg'\f
*/ #OD/$f_
public void sort(int[] data) { Jhhb7uU+
int[] temp=new int[data.length]; oW*16>IN9l
mergeSort(data,temp,0,data.length-1); ,T$U'&;
} 5x4yyb'
J @1!Oq>
private void mergeSort(int[] data, int[] temp, int l, int r) { "7F?@D$e
int i, j, k; UECK:61Me
int mid = (l + r) / 2; kfY}S
if (l == r) 6iE<T&$3P
return; k"zv~`i'
if ((mid - l) >= THRESHOLD) h2]P]@nW;W
mergeSort(data, temp, l, mid); !ons]^km
else XJ| <?
insertSort(data, l, mid - l + 1); FbFPJ !fb
if ((r - mid) > THRESHOLD) 051E6-
mergeSort(data, temp, mid + 1, r); Zt{[*~
else qWPkT$ u
insertSort(data, mid + 1, r - mid); ,j_i?Ff
!``,gExH
for (i = l; i <= mid; i++) { u^I|T.w<r6
temp = data; #gs`#6 ,'
} 29] G^f>
for (j = 1; j <= r - mid; j++) { 08\,<9
temp[r - j + 1] = data[j + mid]; eJX9_6m-
} )g%d:xI
int a = temp[l]; `e&Suyf4B
int b = temp[r]; G}raA%
for (i = l, j = r, k = l; k <= r; k++) { Z0", !6nS
if (a < b) { R.1.)P[
data[k] = temp[i++]; ,<P vovg_
a = temp; S g![Lsj
} else { .g<DD)`
data[k] = temp[j--]; z,p~z*4
b = temp[j]; wE`]7mA
} 16(QR-
} AH7}/Rc
} wc4{)qDE
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/** rw JIx|(
* @param data Ioa$51&
* @param l jLm ;ty2;
* @param i .[OUI
*/ Wt-GjxGi
private void insertSort(int[] data, int start, int len) { bJTBjS-7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); iz PDd{[
} z$. 88^
} K Z91-
} n 0L^e
} /7F:T[
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堆排序： dcN22A3
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package org.rut.util.algorithm.support; @K!T,U
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import org.rut.util.algorithm.SortUtil; nmKp[-5
9qzHS~l
/** HQhM'x
* @author treeroot yWo; a
* @since 2006-2-2 I,vJbvvl!
* @version 1.0 c`w}|d]mC
*/ ~=l;=7 T
public class HeapSort implements SortUtil.Sort{ m&&m,6``P
`|&O*`
/* (non-Javadoc) @lrztM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c<Tf 2]vZE
*/ y766; X:J
public void sort(int[] data) { .}~_a76
MaxHeap h=new MaxHeap(); RMu~l@
h.init(data); KB(8f*
for(int i=0;i h.remove(); s9DYi~/,
System.arraycopy(h.queue,1,data,0,data.length); T+H!_ky`A
} $B5aje}i
Bn&ze.F
private static class MaxHeap{ ; )@~
1K50Z.o&@
void init(int[] data){ T}v4*O.,
this.queue=new int[data.length+1]; !wh8'X*
for(int i=0;i queue[++size]=data; 'e'cb>GnA
fixUp(size); Cjlk
} ;+hH
} JOeeU8C
M&9+6e'-F
private int size=0; ')<hON44EX
MeZf*' J
private int[] queue; 5D//*}b,
3{sVVq5Y
public int get() { _ZSR.w}j/
return queue[1]; Y\g3hM
} vy:Z/1q
'c$+sp ?
public void remove() { 4zFW-yy
SortUtil.swap(queue,1,size--); A;?|&`f
fixDown(1); 8$Y9ORs4
} hf&9uHN%7m
file://fixdown JYHl,HH#z
private void fixDown(int k) { 3eQ&F~S
int j; -]M5wb2,
while ((j = k << 1) <= size) { 4ID5q~
if (j < size %26amp;%26amp; queue[j] j++; p9{mS7R9T
if (queue[k]>queue[j]) file://不用交换 8[{ Vu0R
break; L$M9w
SortUtil.swap(queue,j,k); IyG}H}
k = j; c(s.5p ^
} =U?dbSf1*
} $*=<Yw4
private void fixUp(int k) { PALc;"]O
while (k > 1) { >}6%#CAf
int j = k >> 1; {&1/V
if (queue[j]>queue[k]) T1=fNF
break; JY(WK@
SortUtil.swap(queue,j,k); VRB;$
k = j; 9CD_os\h
} v mk2{f,g
} >e$PP8&i_T
ak!G8'w
} <h *4Q
n/mG|)Xt
} hM@>q&q_
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SortUtil： ,Ko!$29[
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package org.rut.util.algorithm; tK\~A,=
cSV aI
import org.rut.util.algorithm.support.BubbleSort; l!u_"I8j5
import org.rut.util.algorithm.support.HeapSort; mc\"yC^s
import org.rut.util.algorithm.support.ImprovedMergeSort; _xhax+,! ~
import org.rut.util.algorithm.support.ImprovedQuickSort; qY!Zt_Be6
import org.rut.util.algorithm.support.InsertSort; :"/d|i`T
import org.rut.util.algorithm.support.MergeSort; $6SW;d+>n
import org.rut.util.algorithm.support.QuickSort; +52{-a,>
import org.rut.util.algorithm.support.SelectionSort; rFL;'Cj@
import org.rut.util.algorithm.support.ShellSort; Ig>(m49d
TarY|P7_
/** (SAs-
* @author treeroot bOY |H~
* @since 2006-2-2 h@ryy\9
* @version 1.0 }0Ed]
*/ IjnU?Bf
public class SortUtil { 7-fb.V9
public final static int INSERT = 1; kE1TP]|
public final static int BUBBLE = 2; `VguQl_,gA
public final static int SELECTION = 3; m ~$v;?i
public final static int SHELL = 4; X!EP$!
public final static int QUICK = 5; "3Y0`&:D
public final static int IMPROVED_QUICK = 6; ey$&;1x#5
public final static int MERGE = 7; 6.yu-xm
public final static int IMPROVED_MERGE = 8; x7 ,5
public final static int HEAP = 9; p9-K_dw3X@
@cXMG6:{
public static void sort(int[] data) { `'7R,
sort(data, IMPROVED_QUICK); 63IM]J
} KoT%Mfu
private static String[] name={ FfT`;j
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" FGq[\B
}; SXP]%{@R/
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private static Sort[] impl=new Sort[]{ DZtsy!xA
new InsertSort(), {]4LULq
new BubbleSort(), sK?twg;D*|
new SelectionSort(), l+0oS'`V*L
new ShellSort(), BnF^u5kv%
new QuickSort(), 8zW2zkv2|#
new ImprovedQuickSort(), =41?^1\
new MergeSort(), <lJ345Q
new ImprovedMergeSort(), U8$27jq
new HeapSort() sc#qwQ#
}; G$('-3@i`w
PXNuL&
public static String toString(int algorithm){ c'\dFb9a
return name[algorithm-1]; 8P\Zo8}v
} }W^A*]X
kvu)y`
public static void sort(int[] data, int algorithm) { M x"\5i
impl[algorithm-1].sort(data); 2&J)dtqz
} g2Z`zQA7
&s!@29DXR
public static interface Sort { Ar#(psU
public void sort(int[] data); B/Ws_Kv
} deh*Ib:(S
BDQsP$'6QT
public static void swap(int[] data, int i, int j) { /Z}}(6T
int temp = data; -"9
data = data[j]; ;*2Cm'8E
data[j] = temp; }4X0epPp;:
} C~exi[3
} rEz^