[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; Hy3J2p9.
} ~JT2el2W7p
int i1=l; I]eeV+U8W
int i2=mid+1; W~mo*EJ'^
for(int cur=l;cur<=r;cur++){ y7UU'k`
if(i1==mid+1) (@}^ 3jpT
data[cur]=temp[i2++]; ^)9/Wz _x
else if(i2>r) [ojL9.6
data[cur]=temp[i1++]; 7310'wc
else if(temp[i1] data[cur]=temp[i1++]; 2B$dT=G
else *}C%z(
data[cur]=temp[i2++]; c-hc.i}!
} ZOfv\(iJ;
} 4|_xz;i
OT\D;Z"__I
} 3q4Zwv0z20
lknj/i5L
改进后的归并排序: I?D=Q$s
K{_~W yRF
package org.rut.util.algorithm.support; aiX&`
Y[L,rc/j
import org.rut.util.algorithm.SortUtil; 0E#??gN
!X7z y9
/** RTVU3fw
* @author treeroot I7Kgi3
* @since 2006-2-2 g"sb0d9
* @version 1.0 uH$hMg
*/ ?H8w;Csq-
public class ImprovedMergeSort implements SortUtil.Sort { s;P _LaIp)
pHR`%2!"t
private static final int THRESHOLD = 10; ^?fsJ
sRT5i9TQ
/* iyCH)MA
* (non-Javadoc) mIf)=RW
* 4'D^>z!c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2n>mISy+
*/ b [HnhAI
public void sort(int[] data) { j6^.Q/{^
int[] temp=new int[data.length]; &kdW(;`
mergeSort(data,temp,0,data.length-1); a`yCPnB(
} ?W ^`Fa)]o
x3'ANw6E
private void mergeSort(int[] data, int[] temp, int l, int r) { *8qRdI9
int i, j, k; =UO7!vr;[
int mid = (l + r) / 2; SLP$|E;
if (l == r) N@0/=B[n
return; ,hNs{-*
if ((mid - l) >= THRESHOLD) A*qR<cp[
mergeSort(data, temp, l, mid); "=]'"'B:
else ?_{{iil
insertSort(data, l, mid - l + 1); B[sI7D>Y
if ((r - mid) > THRESHOLD) Wx/PD=Sf&
mergeSort(data, temp, mid + 1, r); IH*G7;
else zLr:zfl
insertSort(data, mid + 1, r - mid); umPN=0u6
CA|W4f}
for (i = l; i <= mid; i++) { 68~]_r.a
temp = data; W"/,<xHuh
} q\P{h ij
for (j = 1; j <= r - mid; j++) { ~]%re9jGW
temp[r - j + 1] = data[j + mid]; 8}oe))b
} P<1&kUZL
int a = temp[l]; 4t*VI<=<[
int b = temp[r]; 2bXCFv7}
for (i = l, j = r, k = l; k <= r; k++) { F$v^S+Ch
if (a < b) { Y]&2E/oc
data[k] = temp[i++]; 3 P\4K
a = temp; fCb&$oRr!
} else { y\6C9%.
data[k] = temp[j--]; :`yW^b
b = temp[j]; Xa}y.qH
} V?MaI.gj
} (Gzq 1+B
} :gkn`z
iF##3H$c
/** 9Z2aFW9
* @param data >r:z`^p
* @param l l0!`>Xx[b
* @param i F%ukT6xp
*/ v{SYz<(
private void insertSort(int[] data, int start, int len) { ]R"n+LnI:=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _}H`(d%N
} -k,}LJjo
} @MH/efW.
} }z-)!8vF
} @!\lt$
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堆排序： oe_,q&e
rt! lc-g%/
package org.rut.util.algorithm.support; >va9*pdJ
tdi}P/x
import org.rut.util.algorithm.SortUtil; :=`N2D
(j)>npOd9
/** fJ-8$w\uL
* @author treeroot o[G,~f\-
* @since 2006-2-2 s\ ]Rgi>w
* @version 1.0 8{.:$T
*/ @rW%*?$7
public class HeapSort implements SortUtil.Sort{ y?s#pSX;N
Q0_|?]v
/* (non-Javadoc) `ucr;P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \xtmd[7lb<
*/ ByXcs'
public void sort(int[] data) { 'q*/P&x5
MaxHeap h=new MaxHeap(); ~u80v h'
h.init(data); @ GzN0yXhR
for(int i=0;i h.remove(); 9y"\]G77E
System.arraycopy(h.queue,1,data,0,data.length); P-lE,X
} "IsDL^)A9
-}<W|r
private static class MaxHeap{ kKSn^qL*
[hXU$Y>"0
void init(int[] data){ <j89HtCz
this.queue=new int[data.length+1]; ^,Y#_$oR
for(int i=0;i queue[++size]=data; GfT`>M?QGK
fixUp(size); n&uD=-
} 8h7z
} 9/S-=VOe.t
>&N8Du*[
private int size=0; "(#]H;!W
fNaS?tV)
private int[] queue; owc#RW9 7
hAp<$7
public int get() { R`|GBVbv
return queue[1]; KC{HX?
} t.oP]_mI
:Keek-E`e=
public void remove() { B?J#NFUb
SortUtil.swap(queue,1,size--); JB= L\E}
fixDown(1); 6muZE1sn
} _/5mgn<GK
file://fixdown aYQIe7J90J
private void fixDown(int k) { [SJ*ks,]
int j; >*%mJX/F
while ((j = k << 1) <= size) { k:0HsN!F9
if (j < size %26amp;%26amp; queue[j] j++; ( XoL,lJ
if (queue[k]>queue[j]) file://不用交换 p M:lg
break; ^SKuX?f\
SortUtil.swap(queue,j,k); PNn{Rt
k = j; lclSzC9
} a$SGFA}V
} Zg/ra1n
private void fixUp(int k) { bm_'giQ:
while (k > 1) { wh@;$s"B
int j = k >> 1; @m[r0i0J"
if (queue[j]>queue[k]) +Q3i&"QB.
break; ?HBNd&gZ1G
SortUtil.swap(queue,j,k); 4~3 N;]X
k = j; |BGQ|7DyG
} W"_")V=QBz
} Z!P7mH\c}
I=)u:l c
} lV-b
%(,Kj ~0
} _>8ZL)NQQ
wtCz%!OYB
SortUtil： B6&;nU>;
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package org.rut.util.algorithm; %o4ZD7@ '
i"~J -{d}
import org.rut.util.algorithm.support.BubbleSort; |?=K'[5
import org.rut.util.algorithm.support.HeapSort; mX9amS&B$
import org.rut.util.algorithm.support.ImprovedMergeSort; ?H\K];
import org.rut.util.algorithm.support.ImprovedQuickSort; VFj}{Y
import org.rut.util.algorithm.support.InsertSort; YQWGv,47\
import org.rut.util.algorithm.support.MergeSort; `<1o}r 7i
import org.rut.util.algorithm.support.QuickSort; B 3Y,|*
import org.rut.util.algorithm.support.SelectionSort; KErQCBeJ
import org.rut.util.algorithm.support.ShellSort; x78`dX
:nZVP_d+
/** LE!xj 0
* @author treeroot E)l0`83~^
* @since 2006-2-2 |kPjjVGF{
* @version 1.0 AM4lAq_
*/ ' XJ>;",[
public class SortUtil { 3":vjDq$
public final static int INSERT = 1; 6;WfsG5
public final static int BUBBLE = 2; 1 PL2[_2:
public final static int SELECTION = 3; }w{6Ua
public final static int SHELL = 4; ZS*PY,
public final static int QUICK = 5; ^=f<WKn
public final static int IMPROVED_QUICK = 6; 4PtRTb0<i3
public final static int MERGE = 7; =P}ob eY
public final static int IMPROVED_MERGE = 8; jlvh'y`
public final static int HEAP = 9; $on"@l%U
.ME>ICA
public static void sort(int[] data) { !6Sr*a*5
sort(data, IMPROVED_QUICK); Hd*e9;z
} dwd5P7
private static String[] name={ c2Q KI~\x
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" U($bR|%D
}; T?vM\o%i3
[Dr'
private static Sort[] impl=new Sort[]{ g=)B+SY'
new InsertSort(), aQjs5RbP~
new BubbleSort(), 0&M~lJ
new SelectionSort(), 7s8-Uwl<
new ShellSort(), =E6ND8l@2
new QuickSort(), ;a"g<v
new ImprovedQuickSort(), 52X[{
new MergeSort(), WP*xu-(:
new ImprovedMergeSort(), 'q3<R%^Q
new HeapSort() 3K;V3pJ].
}; |/^ KFY"
8 5 L<
public static String toString(int algorithm){ SvTd#>ke
return name[algorithm-1]; l k~VvRq
} |7Dc7p"D
55Pe&V1=
public static void sort(int[] data, int algorithm) { )RUx
impl[algorithm-1].sort(data); 6zbqv6
} zR@4Z>6
.rPg
public static interface Sort { ?04jkq&
public void sort(int[] data); "SMRvi57T
} 4{PN9i E
s9#WkDR
public static void swap(int[] data, int i, int j) { ttP|}|O
int temp = data; \wjT|z1+Y
data = data[j]; Lm-f0\(
data[j] = temp; > J.q3
} ^;8dl.;
} 5q^5DH_;