[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; ]YKWa"
} y->iv%
int i1=l; r3)t5P*_
int i2=mid+1; %dQX d]
for(int cur=l;cur<=r;cur++){ w,$17+]3
if(i1==mid+1) zAIC5fvu
data[cur]=temp[i2++]; S^.=j oI
else if(i2>r) :zoX Xo
data[cur]=temp[i1++]; 'LI)6;Yc
else if(temp[i1] data[cur]=temp[i1++]; Plv+mb
else w9BH>56/"
data[cur]=temp[i2++]; h)8_sC
} ^6n]@4P
} 4]R3*F
lUz@Em
} bvKi0-
r~t7Z+PXF
改进后的归并排序: W_EN4p~J
>?V->7QLP
package org.rut.util.algorithm.support; _!D$Aj
bf+2c6_BN0
import org.rut.util.algorithm.SortUtil; 2:yv:7t/
e%\KI\u
/** AJ}Q,E
* @author treeroot w5Z3e^g
* @since 2006-2-2 gsH_pG-jU
* @version 1.0 CaMG$X&O
*/ \k8_ZJw
public class ImprovedMergeSort implements SortUtil.Sort { IU}`5+:m
:|TBsd|/x
private static final int THRESHOLD = 10; $+j)
a{=~#u8
/* MJoC*8QxM
* (non-Javadoc) ~]Jfg$'
* <Th.}=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j7zQ&ANF
*/ D1a4+AyI
public void sort(int[] data) { Zuf&maa S
int[] temp=new int[data.length]; 4a~_hkY]
mergeSort(data,temp,0,data.length-1); !k) ?H* ^@
} :gn!3P}p?
r+2dBp3
private void mergeSort(int[] data, int[] temp, int l, int r) { }ls>~uN
int i, j, k; .u&g2Y
int mid = (l + r) / 2; 5q[@N J
if (l == r) N 2\,6<
return; M'sJ5;^5
if ((mid - l) >= THRESHOLD) 3yDvr*8-@
mergeSort(data, temp, l, mid); j<u`W|vl
else b%6_LK[
insertSort(data, l, mid - l + 1); ,==lgM2V>
if ((r - mid) > THRESHOLD) M*Xzr .6
mergeSort(data, temp, mid + 1, r); BH^q.p_#>X
else 9b>a<Z
insertSort(data, mid + 1, r - mid); (msJ:SG
&%<G2x$
for (i = l; i <= mid; i++) { ZZUCwczI
temp = data; uWSG+
} "cZ.86gG`:
for (j = 1; j <= r - mid; j++) { AiuF3`Xa
temp[r - j + 1] = data[j + mid]; 3-0Y<++W3>
} vnE,}(M
int a = temp[l]; 3mWN?fC
int b = temp[r]; *hba>LZ
for (i = l, j = r, k = l; k <= r; k++) { sE% n=Ww
if (a < b) { rHznXME$wZ
data[k] = temp[i++]; /C"E*a
a = temp; a"EXR-+8
} else { MWB?V?qPSC
data[k] = temp[j--]; {v(3[7
b = temp[j]; 8@!SM
} ouujd~b+
} H3JWf MlW
} F-m1GG0s
e2>gQ p/
/** |"arVde
* @param data (Xx @_
* @param l NW$Z}?I
* @param i &Ef'5
*/ U<t Qj`
private void insertSort(int[] data, int start, int len) { 0>vm&W<?)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ke0Vy(3t{h
} 5}f$O
} RSy1 wp4W
} 1'h?qv^(
} )<+Z,6
X@B+{IFC
堆排序： &}WSfZ0{
gxF3gM
package org.rut.util.algorithm.support; 'n\ZmG{
l ^{]pD
import org.rut.util.algorithm.SortUtil; u VB&DE
R]dc(D
/** U7O2.y+
* @author treeroot A\:M}D-(
* @since 2006-2-2 l#Iof)@#
* @version 1.0 F$.M2*9
*/ I3$v-OiL
public class HeapSort implements SortUtil.Sort{ 7l?-2I'c
&iTsuA/7
/* (non-Javadoc) rkVZP!7!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F4*f_lP
*/ 9K)2OX;$w
public void sort(int[] data) { MYu-[Hg
MaxHeap h=new MaxHeap(); % L]xar
h.init(data); Rzz*[H
for(int i=0;i h.remove(); 0&<{o!>k
System.arraycopy(h.queue,1,data,0,data.length); O\xUv
} 3?C$Tl2G8
>LLFe~9`g
private static class MaxHeap{ h)sc-e
G'!Hc6OZ
void init(int[] data){ w(VH>t
this.queue=new int[data.length+1]; 7p|Pv;wp|
for(int i=0;i queue[++size]=data; y2)~ljR
fixUp(size); /@q_`tU
} $L(,q!DvH
} B<i1UJ5
}V09tK/M
private int size=0; X)\t=><<
<[(xGrEZV
private int[] queue; S#jE1EN
9n1O@~
public int get() { V<1dA\I"
return queue[1]; LqW~QEU(
} \SyfEcSf2v
nlh%O@,
public void remove() { o;}o"-s
SortUtil.swap(queue,1,size--); oA`Ncu5
fixDown(1); pj'Yv
} LFtnSB8
file://fixdown [<6ez;2q'
private void fixDown(int k) { ~Xa >;
int j; :0r@o:H
while ((j = k << 1) <= size) { gmt`_Dpm$
if (j < size %26amp;%26amp; queue[j] j++; Tk)y*y
if (queue[k]>queue[j]) file://不用交换 pX"f "
break; .^uNzN~
SortUtil.swap(queue,j,k); R9k Z#
k = j; IpHGit28
} (tys7og$'
} _K'YaZTa;~
private void fixUp(int k) { ,9=5.+AJ
while (k > 1) { [i\K#O +f
int j = k >> 1; 2wikk]Z
if (queue[j]>queue[k]) UkeX">
break; A+>+XA'
SortUtil.swap(queue,j,k); pLNv\M+
k = j; FK>8(M/
} pf[bOjtR
} aR+vY1d"
uPt({H
} 8KN0z<
^C_ ;uz
} "RiY#=}sm
W A-\2
SortUtil： ELPzqBI
6ID@0
package org.rut.util.algorithm; ZE#A?5lb
/aNlr>^
import org.rut.util.algorithm.support.BubbleSort; Nn>Oq+:
import org.rut.util.algorithm.support.HeapSort; U%_BgLwy%
import org.rut.util.algorithm.support.ImprovedMergeSort; sBt,y_LW
import org.rut.util.algorithm.support.ImprovedQuickSort; 7;5SK:X%dm
import org.rut.util.algorithm.support.InsertSort; Xnpw'<~X
import org.rut.util.algorithm.support.MergeSort; d=yuuS/
import org.rut.util.algorithm.support.QuickSort; 22(7rUkI
import org.rut.util.algorithm.support.SelectionSort; =HH}E/9z
import org.rut.util.algorithm.support.ShellSort; s: pmB\
.liVlo@
/** YH@p\#Y
* @author treeroot <BEM`2B
* @since 2006-2-2 /{|JQ'gqX
* @version 1.0 ZuH@qq\
*/ 6C7|e00v
public class SortUtil { IZn|1X?}\s
public final static int INSERT = 1; IN~Q(A]Z%
public final static int BUBBLE = 2; E:(DidSE@
public final static int SELECTION = 3; \W4|.[
public final static int SHELL = 4; @vs+)aRa
public final static int QUICK = 5; tFn_{fCc>
public final static int IMPROVED_QUICK = 6; plN:QS$
public final static int MERGE = 7; lp+Uox
public final static int IMPROVED_MERGE = 8; }fU"s"
public final static int HEAP = 9; Lk#8G>U
"V'<dn
public static void sort(int[] data) { B OKY X
sort(data, IMPROVED_QUICK); *:}9(8d
} sYE|
private static String[] name={ :"{("!x
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" eaB6e@]@
}; rK(TekU
_X;xW#go
private static Sort[] impl=new Sort[]{ 9(eTCe-~6
new InsertSort(), +6-_9qRq
new BubbleSort(), 1UdET#\
new SelectionSort(), rrz^LD
new ShellSort(), m#|;?z
new QuickSort(), o+*7Q!
new ImprovedQuickSort(), Pg4go10|
new MergeSort(), kT^|%bB[i
new ImprovedMergeSort(), 3e,"B S)+
new HeapSort() '3Ro`p{
}; ;#)sV2F\&
+7E&IK
public static String toString(int algorithm){ .|UIZwW0
return name[algorithm-1]; m9Xauk$(
} Tg/?v3M88
;XagLy
public static void sort(int[] data, int algorithm) { \ ]v>#VXr_
impl[algorithm-1].sort(data); xe`SnJgA
} >W>3w
o4P>t2'
public static interface Sort { E/OfkL*\
public void sort(int[] data); U'*~Ju
} 7G':h0i8
{?X:?M_
public static void swap(int[] data, int i, int j) { y8%QS*
int temp = data; tK7v&[cI
data = data[j]; wjy<{I
data[j] = temp; <*_DC)&79
} 5LaF'>1yY
} OJ?U."Lxm$