[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; {aAd (~YZ
} 1ksFxpE
int i1=l; _X#Rv2a
int i2=mid+1; L[<#>/NPy
for(int cur=l;cur<=r;cur++){ ;6/WjUDw<|
if(i1==mid+1) 3ijPm<wn
data[cur]=temp[i2++]; !hVbx#bXl
else if(i2>r) DS?.'"n[u
data[cur]=temp[i1++]; Pn!~U] A$%
else if(temp[i1] data[cur]=temp[i1++]; !.P||$x`&
else !E$$FvL
data[cur]=temp[i2++]; n])#<0
} Wt/;iq"
} 2E }vuw=c
*2Pr1U
} 3sr_V~cZ9
||hQ*X<m>
改进后的归并排序: 1$b@C-B@g
i q`}c |c
package org.rut.util.algorithm.support; "pkdZ
a``|sn9
import org.rut.util.algorithm.SortUtil; ]g-%7g|
JuO47}i]5
/** ~,/@]6S&Y
* @author treeroot ?tYZ/
* @since 2006-2-2 |Gic79b
* @version 1.0 X['9;1Xr
*/ 6f +aGz
public class ImprovedMergeSort implements SortUtil.Sort { ,l~<|\4,wv
lpG%rN!
private static final int THRESHOLD = 10; ~N!HxQ
k6CXuU
/* ;VE y{%nF
* (non-Javadoc) m*m),mZ"
* -,bnj^L
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) uw\@~ ,d
*/ %u!=<yn'
public void sort(int[] data) { xr'1CP
int[] temp=new int[data.length]; +vkmS
mergeSort(data,temp,0,data.length-1); Y,s EM%
} f$dPDbZQ
DFMpU.BN W
private void mergeSort(int[] data, int[] temp, int l, int r) { gsL=_# ?
int i, j, k; e!5} #6Kd
int mid = (l + r) / 2; w(@r-2D"
if (l == r) Jk*cuf`rq
return; @` KYgjjH
if ((mid - l) >= THRESHOLD) ,;,B7g
mergeSort(data, temp, l, mid); l@);U%\pS
else ]s=|+tz\V
insertSort(data, l, mid - l + 1); ;TL.QN/l
if ((r - mid) > THRESHOLD) ,4'gj0
mergeSort(data, temp, mid + 1, r); H*0Y_H=
else 9rEBq&
insertSort(data, mid + 1, r - mid); %jHm9{|X
~xd?y*gk;
for (i = l; i <= mid; i++) { irQ'Rm[
temp = data; Om*QN]lGq
} CY o m
for (j = 1; j <= r - mid; j++) { ILm+o$o~
temp[r - j + 1] = data[j + mid]; 0j@mzd2
} ;MN$.x+
int a = temp[l]; T >8P1p@A,
int b = temp[r]; iTHwH{!
for (i = l, j = r, k = l; k <= r; k++) { x)C}
if (a < b) { j*>J1M3E
data[k] = temp[i++]; [1rQ'FBB^1
a = temp; =muQ7l:(
} else { "'CvB0>
data[k] = temp[j--]; z>PVv)X
b = temp[j]; =\6)B{#T
} ,' k?rQ
} e)uC
} Dck/Ea
aEN` `
/** %O`@}Tg
* @param data m]jA(
* @param l EL~$7 J
* @param i Xc-["y64
*/ YF{MXK}
private void insertSort(int[] data, int start, int len) { .\caRb[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ]nsjYsT
} D_lRYLA+
} dWd%>9}
} S1$^ _S =
} +@ChZ
%"`p&aE:
堆排序： jt}Re,
7.29'
package org.rut.util.algorithm.support; @JGmOwZ
+JErc)%
import org.rut.util.algorithm.SortUtil; =7V4{|ESfy
SrKitSG
/** uq3pk3 )W9
* @author treeroot #}#m\=0
* @since 2006-2-2 ndD>Oc}"3
* @version 1.0 |jIHgm
*/ /MtmO$.
public class HeapSort implements SortUtil.Sort{ [~N;d9H+*1
=RWTjTZ
/* (non-Javadoc) W^iK9|[qp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &%fcGNzJQ
*/ V,KIi_Z
public void sort(int[] data) { <%^/uS
MaxHeap h=new MaxHeap(); QYbB\Y
h.init(data); `ArUoYbB
for(int i=0;i h.remove(); %* 0GEfl/
System.arraycopy(h.queue,1,data,0,data.length); v\@qMaPY
} 5[;[Te9=S
e_b,{l#
private static class MaxHeap{ Ii+3yE@c
$U[d#:]
void init(int[] data){ 1>e30Ri,g
this.queue=new int[data.length+1]; I<2`wL=
for(int i=0;i queue[++size]=data; s*GZOz
fixUp(size); \kQ)fk]^
} 4$R!)
} [#GBn0BG)
3uYLA4[-B
private int size=0; =G}a%)?As\
[bnu DS
private int[] queue; jgE{JK\n4
[R4#bl
public int get() { yepRJ%mp
return queue[1]; cB,^?djJ3
} *fm?"0M5
Fbo"Csn_
public void remove() { *z[vp2 TN
SortUtil.swap(queue,1,size--); 9i\}^s2
fixDown(1); Tu(:?
} z<eu=OD4t
file://fixdown K#A&
private void fixDown(int k) { <4TI;yy6?
int j; Y@ v][Q
while ((j = k << 1) <= size) { 0'd@8]|H
if (j < size %26amp;%26amp; queue[j] j++; q.J6'v lj/
if (queue[k]>queue[j]) file://不用交换 [6TI_U~
break; 3X(^`lAf)
SortUtil.swap(queue,j,k); ZSNbf|ldiE
k = j; Vu(NP\Wm
} 6 :4GI
} | +;ZC y
private void fixUp(int k) { DG;u_6;JR
while (k > 1) { :kHk'.V1(
int j = k >> 1; lH3.q4D 5
if (queue[j]>queue[k]) -=lm`X<:
break; /6rjGc
SortUtil.swap(queue,j,k); XI`_PQco
k = j; Kvg=7o
} .45wwouZkc
} Z kw-a
c&T5C,]
} DAq H
ai;!Q%B#Q
} l]|&j`'O
bpsyO>lx/
SortUtil： G5qsnTxUJ
Lx-%y'P
package org.rut.util.algorithm; :fmV||Q
MLr L"I"
import org.rut.util.algorithm.support.BubbleSort; .g/!u(iy
import org.rut.util.algorithm.support.HeapSort; VQ!4( <XD
import org.rut.util.algorithm.support.ImprovedMergeSort; 9]3l'
import org.rut.util.algorithm.support.ImprovedQuickSort; r5&c!b\
import org.rut.util.algorithm.support.InsertSort; ScJ:F-@>
import org.rut.util.algorithm.support.MergeSort; -v9(43
import org.rut.util.algorithm.support.QuickSort; ]/!*^;cY(
import org.rut.util.algorithm.support.SelectionSort; Q+f|.0r
import org.rut.util.algorithm.support.ShellSort; !}c D e12
@16y%]Q-E#
/** Jha*BaD~N
* @author treeroot U+VJiz<!
* @since 2006-2-2 <@`K^g;W
* @version 1.0 ~6#mVP5sU)
*/ s;h`n$
public class SortUtil { f@Mku0VT
public final static int INSERT = 1; =3,<(F5Y[
public final static int BUBBLE = 2; cY} jPDH
public final static int SELECTION = 3; t>]W+Lx#
public final static int SHELL = 4; K/(LF}
public final static int QUICK = 5; =O8YU)#
public final static int IMPROVED_QUICK = 6; M(8xwo-W
public final static int MERGE = 7; 4`~OxL
public final static int IMPROVED_MERGE = 8; ,dba:D=l
public final static int HEAP = 9; `*CoVx~fk
/,7#%D
public static void sort(int[] data) { *Iw19o-I
sort(data, IMPROVED_QUICK); Q\X_JZ
} blz#M #
private static String[] name={ &h[)nD
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" G%gdI3h1Z
}; 0D:uM$ i]
@uC-dXA"
private static Sort[] impl=new Sort[]{ 3znhpHO)
new InsertSort(), M/V"Ke"N
new BubbleSort(), F-Z>WC{+
new SelectionSort(), Q9y|1Wg1W
new ShellSort(), iP7KM*ks
new QuickSort(), e7G>'K
new ImprovedQuickSort(), /_fZ2$/
new MergeSort(), h<m>S,@g
new ImprovedMergeSort(), :%Z)u:~':
new HeapSort() Ql7opl,
}; JF&$'
JKmd'ZGw
public static String toString(int algorithm){ =uwG.,lC
return name[algorithm-1]; O'SxTwO
} >y+j!)\
\mN?5QCcE
public static void sort(int[] data, int algorithm) { p38s&\-kEN
impl[algorithm-1].sort(data); L%9yFg%u
} avS9"e
6w<p1qhW
public static interface Sort { UL7%6v{'*
public void sort(int[] data); ~R|fdD/%
} AF{o=@
,^xsdqpe
public static void swap(int[] data, int i, int j) { P\c0Q;){h"
int temp = data; (I`<;
data = data[j]; hy"p8j7_
data[j] = temp; LY0/\Z"N
} etW-gbr
} /C<} :R