[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; FOhq&\nkU
} Gx*B(t]4y
int i1=l; 3 }3C*w+
int i2=mid+1; 0+k..l
for(int cur=l;cur<=r;cur++){ +R7pdi
if(i1==mid+1) BSL+Gjj~}
data[cur]=temp[i2++]; =b8u8*ua
else if(i2>r) B.!&z-)#
data[cur]=temp[i1++]; T oT('
else if(temp[i1] data[cur]=temp[i1++]; KAi_+/]K_
else =sso )/3
data[cur]=temp[i2++]; R?y_tho4A
} `dWnu3r;
} 5LZs_%#
P@Fx6
} BC5R$W.e
q VavP6I
改进后的归并排序: /([a%,DI
^M\X/uq$E
package org.rut.util.algorithm.support; WM%w_,Z
#xfav19{.
import org.rut.util.algorithm.SortUtil; $KhD>4^jL
RY3=UeoF
/** &-!$qUli
* @author treeroot l](!2a=[
* @since 2006-2-2 Dbb=d8utE
* @version 1.0 Uw| -d[!
*/ FAdTp.
public class ImprovedMergeSort implements SortUtil.Sort { aPRMpY-YC3
/ U!xh3
private static final int THRESHOLD = 10; HCx0'|J
8Zy*#[-
/* hgbf"J6V8
* (non-Javadoc) _pzYmQ
* Igw2n{})w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4TyzD%pOw
*/ AAqfp/DC
public void sort(int[] data) { B%`|W@v
int[] temp=new int[data.length]; FLZ9Rg
mergeSort(data,temp,0,data.length-1); s:cJF
} ?2R!n"m-d
t1~k+
private void mergeSort(int[] data, int[] temp, int l, int r) { ,tDLpnB@;
int i, j, k; pMY7{z
int mid = (l + r) / 2; DliDBArxZ
if (l == r) aHb&+/HZ
return; gvPHB+#A
if ((mid - l) >= THRESHOLD) S(^YTb7
mergeSort(data, temp, l, mid); &kn?=NW
else BS?i!Bm7
insertSort(data, l, mid - l + 1); 72/ bC
if ((r - mid) > THRESHOLD) -8vGvI>
mergeSort(data, temp, mid + 1, r); Y;iI=U
else ] _W'-B
insertSort(data, mid + 1, r - mid); B.KK@
CEBu[TT/9
for (i = l; i <= mid; i++) { O9m sPb:
temp = data; zo("v*d*q
} I[b{*g2Zw
for (j = 1; j <= r - mid; j++) { F/,6Jh
temp[r - j + 1] = data[j + mid]; ^6Zx-Mf\
} wp'[AR}
int a = temp[l]; lHPnAaue@
int b = temp[r]; yE.st9m
for (i = l, j = r, k = l; k <= r; k++) { -[&Z{1A4x4
if (a < b) { gI9nxy
data[k] = temp[i++]; 8k)*f+1o
a = temp; 2 E?]!9T~|
} else { Y]Z&
data[k] = temp[j--]; deq5u>
b = temp[j]; 9P,[MZ
} JG&E"j#q
} 0LYf0^P
} LpI4R
%%I:L~c
/** bKsEXS
* @param data DZ4gp
* @param l 9Y2.ob!$}
* @param i D=Nt0y
*/ x>,wmk5)
private void insertSort(int[] data, int start, int len) { (kyRx+gA
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9G"4w`P
} &x=_n'
} _/"e'@z
} F>^KXq:Z
} X\w["!B
cvf?ID84
堆排序： E{QjmlXQ<
+]GP"yv-
package org.rut.util.algorithm.support; q2OF-.rE
}}u`*&,g
import org.rut.util.algorithm.SortUtil; <%W&xk
S,udpQ7
/** U>00B|<GJ
* @author treeroot kGC*\?<LmR
* @since 2006-2-2 ^CM@VmPp
* @version 1.0 "=KFag
*/ 9YB?wh'S[
public class HeapSort implements SortUtil.Sort{ t-n'I/^5
c6=XJvz
/* (non-Javadoc) 3]@wa!`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dd;rnev+
*/ t;0]d7ey'
public void sort(int[] data) { N})vrB;1
MaxHeap h=new MaxHeap(); I 9?X
h.init(data); \zBZ$5 rE
for(int i=0;i h.remove(); [Jjo H1E@
System.arraycopy(h.queue,1,data,0,data.length); Jt0/*^'
} H6>tto
U%Hcck'
private static class MaxHeap{ nv7)X2jja
}sJ}c}b
void init(int[] data){ m(dW["8D
this.queue=new int[data.length+1]; fZS'e{V
for(int i=0;i queue[++size]=data; R?,v:S&i7;
fixUp(size); ew~uOG+
} >WJQxL4
} }6 u)wF5
"vkM*HP
private int size=0; r+6 DlT a
69Z`mR
private int[] queue; 7l09
?5;wPDsK
public int get() { ME$J?3r
return queue[1]; TEGg)\+D>
} =h?%<2t9<
G(o6/
public void remove() { +z#+}'mT%
SortUtil.swap(queue,1,size--); [#SO}'1n
fixDown(1); l}T@Cgt
} beT[7uVj_
file://fixdown :/Z1$xS
private void fixDown(int k) { m(1ot M9
int j; foY]RkW9
while ((j = k << 1) <= size) { <VQ@I
if (j < size %26amp;%26amp; queue[j] j++; &oJ[ *pQ
if (queue[k]>queue[j]) file://不用交换 a@9W'/?igk
break; |mdf u=
SortUtil.swap(queue,j,k); Xk:3w,
k = j; q$s)(D
} \f VX<L
} ^JY:$)4["
private void fixUp(int k) { /xr75|-8
while (k > 1) { `#r/L@QI
int j = k >> 1; x>Dix1b:.
if (queue[j]>queue[k]) 5p-vSWr!
break; +# !?+'A
SortUtil.swap(queue,j,k); c=a;<,Rzb
k = j; : Q2=t!
} usu{1&g
} q[Ey!h)xq
hY *^rY'
} 6Bd:R}yZP7
Uxe]T
} }dqOE-"I"n
C\;%IGn
SortUtil： }N,v&B
=i2]qj\
package org.rut.util.algorithm; *+2BZZwT
Z^J)]UL/
import org.rut.util.algorithm.support.BubbleSort; d7x6r3J$
import org.rut.util.algorithm.support.HeapSort; [iyhrc:@
import org.rut.util.algorithm.support.ImprovedMergeSort; lQt,(@7]
import org.rut.util.algorithm.support.ImprovedQuickSort; !:uh? RW
import org.rut.util.algorithm.support.InsertSort; bGwj` lue
import org.rut.util.algorithm.support.MergeSort; 31%3&B:Ts
import org.rut.util.algorithm.support.QuickSort; l Dwq[ I]w
import org.rut.util.algorithm.support.SelectionSort; f{\[+>
import org.rut.util.algorithm.support.ShellSort; 8{7'w|/;.{
]/%CTD(O
/** ;Yg/y
* @author treeroot m1tc="j
* @since 2006-2-2 dDA&\BuS
* @version 1.0 &t'P>6)
*/ @00&J~D
public class SortUtil { j.V7`x
public final static int INSERT = 1; +K2HMf'
public final static int BUBBLE = 2; 7E?60^Tve
public final static int SELECTION = 3; goD#2lg
public final static int SHELL = 4; o?3C-A|
public final static int QUICK = 5; cA]PZ*]{BN
public final static int IMPROVED_QUICK = 6; 5twG2p8
public final static int MERGE = 7; QYAt)Ik9q
public final static int IMPROVED_MERGE = 8; 3L4v@
public final static int HEAP = 9; U9%^gC
_?bF;R
public static void sort(int[] data) { EU Oa8Z
sort(data, IMPROVED_QUICK); YW8Odm
} 8)b*q\O'
private static String[] name={ )sK_k U{\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" SpEu>9g&
}; =^zOM6E1ZF
ZKB27D_vg>
private static Sort[] impl=new Sort[]{ h<WTN_i}
new InsertSort(), +<f+kh2L
new BubbleSort(), Qi9M4Yv
new SelectionSort(), jq|fIP
new ShellSort(), JxRn)D
new QuickSort(), sd*NY
new ImprovedQuickSort(), :0o]#7
new MergeSort(), i^4i]+
new ImprovedMergeSort(), 6HpiG`
new HeapSort() :D !/.0
}; <c [X^8
KJV],6d
public static String toString(int algorithm){ FuFICF7+C
return name[algorithm-1]; Rp}Sm,w(
} 6Q*zZ]kg
.[6T7fdi
public static void sort(int[] data, int algorithm) { COH>B1W@
impl[algorithm-1].sort(data); |4` ;G(ta
} Eqx|k-<a
WxtB:7J
public static interface Sort { WtMDHfwqu\
public void sort(int[] data); d#I; e
} 8Urj;KkD
S;nlC
public static void swap(int[] data, int i, int j) { ^Uik{x
int temp = data; C33RXt$X
data = data[j]; ZM57(D
data[j] = temp; sHSg _/|
} 5hlS2fn
} N_VWA.JHt