[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; H,+I2tEs
} \cC%!4
int i1=l; 9;Itqe{8w
int i2=mid+1; ,Vh.T&X5
for(int cur=l;cur<=r;cur++){ t'BLVCu
if(i1==mid+1) Yu?95qktP
data[cur]=temp[i2++]; D|rFu
else if(i2>r) |AcRIq
data[cur]=temp[i1++]; 'a$Gv&fu
else if(temp[i1] data[cur]=temp[i1++]; WA]c=4S
else Y|8:;u'
data[cur]=temp[i2++]; 2R=DB`3
} /I)yU>o
} }:u~K;O87
hF@Gn/
} vFE;D@bz:
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改进后的归并排序: 2WtRJi?b|
XK|R8rhg8`
package org.rut.util.algorithm.support; Jd5:{{Lb
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import org.rut.util.algorithm.SortUtil; kGdt1N[
{]E+~%Va
/** vhsk0$f
* @author treeroot H2 $GIY
* @since 2006-2-2 3dht!7/
* @version 1.0 S}$r>[t
*/ BT)X8>ct
public class ImprovedMergeSort implements SortUtil.Sort { ]4R[<<hd
R,9[hNHWGs
private static final int THRESHOLD = 10; jeGj<m
SfJ./ny
/* t5'V6nv
* (non-Javadoc) qZ}P*+`Q
* F>]m3(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %z#f.Ql
*/ ^ <Pq,u%k
public void sort(int[] data) { K'X2dG*
int[] temp=new int[data.length]; ,y+$cM(
mergeSort(data,temp,0,data.length-1); @+9<O0
} 0 ;b[QRmy
:um|nRwy9
private void mergeSort(int[] data, int[] temp, int l, int r) { E<C&Cjz:H
int i, j, k; +)j1.X
int mid = (l + r) / 2; FXzFHU/dP
if (l == r) N\HQN0d9
return; Eh =~T9
if ((mid - l) >= THRESHOLD) ;5tazBy&:C
mergeSort(data, temp, l, mid); P>sFV
else W?eu!wL#p
insertSort(data, l, mid - l + 1); C4hx@abA
if ((r - mid) > THRESHOLD) %I-+Ead0i
mergeSort(data, temp, mid + 1, r); TQ`Rk;0R
else 8F:e|\SB#
insertSort(data, mid + 1, r - mid); H"C[&r
s/7 A7![
for (i = l; i <= mid; i++) { mcn 2Wt
temp = data; *P 3V
} /F4pb]U!*
for (j = 1; j <= r - mid; j++) { zGc: @z
temp[r - j + 1] = data[j + mid]; &Ch#-CUE/
} `;l?12|X
int a = temp[l]; '0\@McU]
int b = temp[r]; >~`r:0',
for (i = l, j = r, k = l; k <= r; k++) { Q}!mx7b0]
if (a < b) { zfwS
data[k] = temp[i++]; jMbC Y07v
a = temp; CBDG./
} else { V^hE}`>z&
data[k] = temp[j--]; ' j6gG
b = temp[j]; hUD7_arKF
} f{"8g"[[)(
} hFk3[zTy
} *1 G>YH
A8q;q2
/** N gLU$/y;
* @param data {0;3W7
* @param l ?W(6
* @param i xB@|LtdO9;
*/ Qb!PRCHQ
private void insertSort(int[] data, int start, int len) { @h*fFiY&{
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ?7M.o
} Ov#=]t5
} yA)(*PFz
} v^ /Q 8Q
} [kqYfY?K
:> &fV
堆排序： hXb%;GL
Y3h/~bM%
package org.rut.util.algorithm.support; Oky**B[D'
r?CI)Y;
import org.rut.util.algorithm.SortUtil; "+zCS|
gORJWQv
/** 7@6g<"I
* @author treeroot :5/Uh/sX
* @since 2006-2-2 sHcTd>xS
* @version 1.0 :QWq"cBem
*/ \`, [)`
public class HeapSort implements SortUtil.Sort{ H"Klj_<dH0
bWZbG{Y.
/* (non-Javadoc) e(NLX`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hky;CD~$
*/ l<Q>N|1#k%
public void sort(int[] data) { Z4){ 7|~a
MaxHeap h=new MaxHeap(); 8vuCc=
h.init(data); a=XW[TY1
for(int i=0;i h.remove(); BS&;n
System.arraycopy(h.queue,1,data,0,data.length); +n})Y
} .[u>V
q~L^au8
private static class MaxHeap{ _/S?#
v+e|o:o#
void init(int[] data){ AH4EtZC=W
this.queue=new int[data.length+1]; ;.wX@
for(int i=0;i queue[++size]=data; W5/0`[4
fixUp(size); (~)%Fo9X"
} 'a^{=+
} cECi')
83cW=?UgA
private int size=0; rdnRBFt
W$qd/'%
private int[] queue; {B*W\[ns
0t#g}
public int get() { NNG}M(/V
return queue[1]; aS|wpm)K>8
} ;WT{|z
~|wos-nM
public void remove() { pPVRsXy
SortUtil.swap(queue,1,size--); q{die[J
fixDown(1); dbS +
} #Fu>|2F|
file://fixdown y[O-pD`
private void fixDown(int k) { \Hqc9&0
int j; Q,Z*8FH=
while ((j = k << 1) <= size) { DWt*jX*
if (j < size %26amp;%26amp; queue[j] j++; h{lDxOH*
if (queue[k]>queue[j]) file://不用交换 0aR,H[r[?
break; ,}xbAA#
SortUtil.swap(queue,j,k); xjdw'v+qZo
k = j; *m+5Pr`7
} 6AN)vs}
} NYABmI/0c
private void fixUp(int k) { +:6Ii9GN
while (k > 1) { SbsouGD,{
int j = k >> 1; oUx[+Gnv
if (queue[j]>queue[k]) JO@Bf
break; ">dq0gD
SortUtil.swap(queue,j,k); 6Ggs JU
k = j; ^TXfsQs
} {OT:3SS7
} d~ng6pA
*.f2VQ~H
} pz_e=xr
BbJkdt7
} SQE[m9v
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SortUtil： (#(Or
OySy6IN]q
package org.rut.util.algorithm; Z\>, ),O
K&A;Z>l,v5
import org.rut.util.algorithm.support.BubbleSort; MM{_Ur7Q
import org.rut.util.algorithm.support.HeapSort; 3Rl,GWK
import org.rut.util.algorithm.support.ImprovedMergeSort; eukA[nO7G
import org.rut.util.algorithm.support.ImprovedQuickSort; OQlG+|
import org.rut.util.algorithm.support.InsertSort; yno('1B@
import org.rut.util.algorithm.support.MergeSort; 0?bA$y
import org.rut.util.algorithm.support.QuickSort; U;xF#e
import org.rut.util.algorithm.support.SelectionSort; lx,`hl%
import org.rut.util.algorithm.support.ShellSort; /jD-\,:L}
g?/XZ5$a5
/** d-!<C7O}
* @author treeroot j kn^Z":
* @since 2006-2-2 1H4fJ3-
* @version 1.0 NVIWWX9?
*/ j033%p+Xc
public class SortUtil { 8IY19>4'5J
public final static int INSERT = 1; eE:&qy^
public final static int BUBBLE = 2; S0@T0y#
public final static int SELECTION = 3; eS!C3xC;J]
public final static int SHELL = 4; X} JOX9pK
public final static int QUICK = 5; 6`nR5fh
public final static int IMPROVED_QUICK = 6; -rY 7)=
public final static int MERGE = 7; /Ic[N&
public final static int IMPROVED_MERGE = 8; ):6-
public final static int HEAP = 9; 2z2`
Z>A{i?#m
public static void sort(int[] data) { X:q_c=X
sort(data, IMPROVED_QUICK); H/cTJ9zz
} 8:g!w:$x
private static String[] name={ jMpa?Jp1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" DvT+`X?R
}; *v #/Y9}
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private static Sort[] impl=new Sort[]{ E8[XG2ye
new InsertSort(), rFd@mO
new BubbleSort(), .gD km^
new SelectionSort(), T)\NkM&
new ShellSort(), ^Vo"fI`=C
new QuickSort(), (r F?If
new ImprovedQuickSort(), 70iH0j)
new MergeSort(), QUP|FIpZ
new ImprovedMergeSort(), <f%/px%1
new HeapSort() wGXwzU
}; uW[3G
j@P5(3r
public static String toString(int algorithm){ 9O;vUy)
return name[algorithm-1]; \graMu}-
} cf*zejbw
)/%S=c
public static void sort(int[] data, int algorithm) { YN#XmX%
impl[algorithm-1].sort(data); 6"%qv`.Fp
} j+>Q#&h9
yh!B!v'
public static interface Sort { 1P5LH5
public void sort(int[] data); _t.FL@3e
} 8-A|C< "
W8* 2;F]
public static void swap(int[] data, int i, int j) { &z ksRX
int temp = data; 5c;En6W
data = data[j]; 84Zgo=P}
data[j] = temp; Yw^ Gti'<
} J#@lV
} tR O IBq|