[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; 0L-g'^nn
} k3eN;3#&
int i1=l; zm.sX~j
int i2=mid+1; U*l>8
for(int cur=l;cur<=r;cur++){ Xm+3`$<
if(i1==mid+1) ` R-np_
data[cur]=temp[i2++]; Rla*hc~
else if(i2>r) `t"Kq+
data[cur]=temp[i1++]; &cejy>K
else if(temp[i1] data[cur]=temp[i1++]; ?n~j2-[<
else 6@361f[
data[cur]=temp[i2++]; ~H."{
} 5q*~h4=r7
} N>iCb:_ T;
D($UbT-v
} *m/u3.\
PhdL@Mr
改进后的归并排序: BAed [
`{[C4]Ew/
package org.rut.util.algorithm.support; a,\u|T:g
;Q 6e&Ips/
import org.rut.util.algorithm.SortUtil; p#NZ\qJ
vCr$miZ
/** f4^_FK&
* @author treeroot `{;&Qcg6m
* @since 2006-2-2 Y)5}bmL
* @version 1.0 uvd>
*/ (S{c*"}2
public class ImprovedMergeSort implements SortUtil.Sort { W u{nC
.;Yei6H
private static final int THRESHOLD = 10; AE~}^(G`
<T9m.:l
/* G7xjW6^T
* (non-Javadoc) k82LCV+6
* BE;iC.rW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ou4?`JF)-
*/ 1@Gv`{v
public void sort(int[] data) { x/v+7Pt_
int[] temp=new int[data.length]; $*> _0{<
mergeSort(data,temp,0,data.length-1); `84yGXLK
} x$4'a~E
< duM8
private void mergeSort(int[] data, int[] temp, int l, int r) { *Ux"3IXO
int i, j, k; A>S2BL#=
int mid = (l + r) / 2; l0)6[yXK
if (l == r) ZmF32Ir
return; J>|`
if ((mid - l) >= THRESHOLD) =-Tetp
mergeSort(data, temp, l, mid); .v!e=i}.
else z81!F'x;
insertSort(data, l, mid - l + 1); qN(;l&Q
if ((r - mid) > THRESHOLD) pm|]GkM
mergeSort(data, temp, mid + 1, r); 3j#F'M)s{
else ;trR'~
insertSort(data, mid + 1, r - mid); /pEkig7M
$80/ub:R
for (i = l; i <= mid; i++) { :a`m9s 4
temp = data; HRh".!lxy
} o$;x[US
for (j = 1; j <= r - mid; j++) { 6jA Q
temp[r - j + 1] = data[j + mid]; WR%iUO40
} |'#NDFI>}
int a = temp[l]; -JkO[IF
int b = temp[r]; 0}!lN{m?
for (i = l, j = r, k = l; k <= r; k++) { *?\Nioii
if (a < b) { <#Dc(VhT
data[k] = temp[i++]; 0cVXUTJ|W
a = temp; K>~l6
} else { S6I8zk)Z4
data[k] = temp[j--]; >^}z
b = temp[j]; NmXTk+,L#
} oyY,uB.|
} cgAcAcmY
} }P#gXG
DO; 2)ZQ%
/** %kT:"j(xW
* @param data pDT6>2t
* @param l |\ L2q/u
* @param i j=LF1dG"
*/ R8)"M(u=l
private void insertSort(int[] data, int start, int len) { ,\IZ/1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (Nf.a4O
} mB`r6'#=
} c{q`uI;O
} 7v_e"[s~
} A>k;o0r
1lM0pl6M
堆排序： oB@C-(M
h !1c(UR
package org.rut.util.algorithm.support; {I ,'
g*uO IF
import org.rut.util.algorithm.SortUtil; 1d6pQ9 N
|ouk;r24V
/** ,\i q'}i
* @author treeroot TgLlmU*qMU
* @since 2006-2-2 8jk*N
* @version 1.0 J\BdC];
*/ =W=%!A\g
public class HeapSort implements SortUtil.Sort{ #</yX5!V
xUUp?]9y
/* (non-Javadoc) C}Q2UK-:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2I
*/ 195(Kr<5$
public void sort(int[] data) { $qqusa}`K
MaxHeap h=new MaxHeap(); jEadVM9
h.init(data); [0Sd +{Q
for(int i=0;i h.remove(); eAj}/2y"
System.arraycopy(h.queue,1,data,0,data.length); D3OV.G]`
} @\a- =
{iRNnh
private static class MaxHeap{ *gnL0\*
,&$Y2+
void init(int[] data){ /(w5S',EL
this.queue=new int[data.length+1]; p#w,+)1!d
for(int i=0;i queue[++size]=data; 0NGokaD)H
fixUp(size); C/JFg-r
} U+z&jdnhDR
} Wil+"[Ge
//(c 1/s
private int size=0; .6*A~%-=[d
BeRn9[
private int[] queue; ~H.;pJ{ 8
\a#2Wm
public int get() { 8I'?9rt2M
return queue[1]; bYz:gbs]4|
} 7%tn+
`^/Q"zH
public void remove() { U"Y$7~
SortUtil.swap(queue,1,size--); QB7<$Bp
fixDown(1); {!w]t?h
} l6~eb=u;9g
file://fixdown p5*Y&aKj
private void fixDown(int k) { $FoNEr&q
int j; R*U>T$
while ((j = k << 1) <= size) { RK,~mXA
if (j < size %26amp;%26amp; queue[j] j++; Z7Kc`9.0|
if (queue[k]>queue[j]) file://不用交换 5R4 dN=L*1
break; 9M6&+1XE
SortUtil.swap(queue,j,k); 8447hb?W$
k = j; B0:O]Ax6.^
} q/Q*1
} e:#\Oh
private void fixUp(int k) { @RjLDj+)S
while (k > 1) { v{9eEk1
int j = k >> 1; })":F
if (queue[j]>queue[k]) c09uCito
break; `7LdF,OdE
SortUtil.swap(queue,j,k); q&vr;fB2
k = j; j<c_*^/'9
} TM+7>a$
} 8L#sg^1V
D`ZYF)[}J
} r`=d4dK-
mVxS[Gq
} )9*WmFc+#
}*%%GPJ
SortUtil： 0wx`y$~R
#q\C"N5ip
package org.rut.util.algorithm; *+ 7#z;
<X: 9y
import org.rut.util.algorithm.support.BubbleSort; 7L!k9"X`0F
import org.rut.util.algorithm.support.HeapSort; h:|aQJG5
import org.rut.util.algorithm.support.ImprovedMergeSort; milU,!7J
import org.rut.util.algorithm.support.ImprovedQuickSort; TPrwC~\B/
import org.rut.util.algorithm.support.InsertSort; 6wGf47
import org.rut.util.algorithm.support.MergeSort; mGIS[_dcs
import org.rut.util.algorithm.support.QuickSort; G B15
import org.rut.util.algorithm.support.SelectionSort; j9Lc2'
import org.rut.util.algorithm.support.ShellSort; n7S[ F3
3V-pLs|
/** $I_aHhKt
* @author treeroot 0j*8|{|
* @since 2006-2-2 WPPmh~:
* @version 1.0 6s6[sUf=l&
*/ qLR)>$
public class SortUtil { Agl[Z>Q
public final static int INSERT = 1; zEu*q7
public final static int BUBBLE = 2; 4FYws5]$
public final static int SELECTION = 3; NEX\+dtE~0
public final static int SHELL = 4; ]1klfp,`
public final static int QUICK = 5; Ij"`pdp
public final static int IMPROVED_QUICK = 6; ~($h9*\
public final static int MERGE = 7; 6`4=!ZfI
public final static int IMPROVED_MERGE = 8; j}y"
public final static int HEAP = 9; smSUo/
k}/0B
public static void sort(int[] data) { ,ujoGSx}
sort(data, IMPROVED_QUICK); lOVsp#
} (mv8_~F0
private static String[] name={ Z yIn>]{
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" lO:[^l?F
}; /Qbt
n84*[d}t
private static Sort[] impl=new Sort[]{ #SO9e.yhI
new InsertSort(), y0Ag px
new BubbleSort(), K(hqDif*6
new SelectionSort(), R#oXQaBJ
new ShellSort(), NO'-HKHj
new QuickSort(), *C$ W^u5h
new ImprovedQuickSort(), 5)0R:
new MergeSort(), >I+O@
new ImprovedMergeSort(), daaurT
new HeapSort() p 5P<3(
}; Z(Xu>ap
5=l Ava#
public static String toString(int algorithm){ [&e}@!8O`
return name[algorithm-1]; 6%:N^B=%}
} =YI<L8@g~
_Nw-|N.
public static void sort(int[] data, int algorithm) { /KH3v!G0
impl[algorithm-1].sort(data); syMB~g
} zg[ksny
d]CRvzW
public static interface Sort { pVLfZ?78
public void sort(int[] data); )wmXicURC
} XmLHZ,/
)abo5
public static void swap(int[] data, int i, int j) { ;+cZS=
int temp = data; w J; y4
data = data[j]; kZfO`BVL
data[j] = temp; <wa}A!fu
} dY|(
} gwNv;g