[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; a`Zf_;$@
} z1s"C[W2T
int i1=l; j)qh>y)
int i2=mid+1; <U pjAuG8
for(int cur=l;cur<=r;cur++){ ]_8 \g`"u
if(i1==mid+1) TJ:Lz]l >
data[cur]=temp[i2++]; 0|;=mYa4M
else if(i2>r) ", )
data[cur]=temp[i1++]; ;g]+MLV9
else if(temp[i1] data[cur]=temp[i1++]; R,1,4XT
else |?A-?-
data[cur]=temp[i2++]; ?='9YM
} g>zL{[e!
} P,_E 4y
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} w,9F riW
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改进后的归并排序: ?9TogW>W
bp,CvQ'}a
package org.rut.util.algorithm.support; >O~5s.1u
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import org.rut.util.algorithm.SortUtil; 9To6Rc;
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/** 6~>k]G
* @author treeroot !d(V7`8
* @since 2006-2-2 _@2G]JD
* @version 1.0 W$S.?[X
*/ ,qB081hPG
public class ImprovedMergeSort implements SortUtil.Sort { <bI,y_<K
e AjtWqg
private static final int THRESHOLD = 10; PK" C+o;:
Uw"
/* KK</5Aw9p
* (non-Javadoc) J~.kb k
* <H6Uo#ao
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K<GCP2
*/ E"=$p$k
public void sort(int[] data) { 's<}@-]
int[] temp=new int[data.length]; g\'sGt3O
mergeSort(data,temp,0,data.length-1); p~IvkW>ln)
} Gj3/&'k6
*OiHrI9y
private void mergeSort(int[] data, int[] temp, int l, int r) { y1X.Mvc
int i, j, k; 1~Nz6
int mid = (l + r) / 2; |:z%7J3wP
if (l == r) ikQ2x]Sp
return; ]mSVjF3l
if ((mid - l) >= THRESHOLD) 7f>n`nq?
mergeSort(data, temp, l, mid); CR<l"~X
else srL,9)OC
insertSort(data, l, mid - l + 1); z61 o6mb
if ((r - mid) > THRESHOLD) o;fQ,rP%
mergeSort(data, temp, mid + 1, r); q9Q4F
else X}$S|1CjO
insertSort(data, mid + 1, r - mid); t&_lpffv
Jp- hFD
for (i = l; i <= mid; i++) { 2 O%UT?R
temp = data; +Q.[W`goV
} GfDA5v[
for (j = 1; j <= r - mid; j++) { +\4=G@P.J
temp[r - j + 1] = data[j + mid]; e 6*=Si}V
} d9s"y?8
int a = temp[l]; Gx m"HC
int b = temp[r]; ",a fv{C
for (i = l, j = r, k = l; k <= r; k++) { rgr> ;
if (a < b) { 2sngi@\
data[k] = temp[i++]; 5s;#C/ZZ
a = temp; EOL03N
} else { 4"{q|~&=:$
data[k] = temp[j--]; VuGSP]$q
b = temp[j]; c c:xT0Y
} ec|IT0;
} (U)=t$=o
} J#\/znT
q07>FW R
/** )j](_kvK
* @param data rie1F,
* @param l >a,w8^7
* @param i F)C8LH
*/ >QYxX<W
private void insertSort(int[] data, int start, int len) { xed$z
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =3FXU{"Qi4
} #C|iW@
} _QQO&0Z
} il:""x7^y
} )[A}h'J)
BP`UB
堆排序： Ou/{PK}
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package org.rut.util.algorithm.support; hSxf;>(d
{|qz>
import org.rut.util.algorithm.SortUtil; k7j;'6
d6uL;eR
/** ;(z0r_p<q
* @author treeroot #6JG#!W
* @since 2006-2-2 W)KV"A3C
* @version 1.0 Q WOd&=:
*/ <|v]9`'
public class HeapSort implements SortUtil.Sort{ ~#wq sm
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/* (non-Javadoc) Jg@PhN<9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <MoWS9s!yb
*/ 0 ~VniF^
public void sort(int[] data) { *\emRI>
MaxHeap h=new MaxHeap(); ^27r-0|l^
h.init(data); m/<7FU8
for(int i=0;i h.remove(); [-Dx)N
System.arraycopy(h.queue,1,data,0,data.length); @X|CubJ
} >xT8[
lV3\5AEW
private static class MaxHeap{ J@52<.>6
}.x?$C+\"
void init(int[] data){ ^dQ#\uy
this.queue=new int[data.length+1]; TwY]c<t
for(int i=0;i queue[++size]=data; oTZNW
fixUp(size); op;OPf,
} Po% V%~
} Mc9%s$MT
;8H m#p7,
private int size=0; 5EM(3eY^q
2}K7(y!?u
private int[] queue; awGI|d
2ACN5lyUS
public int get() { SZNM$X|T
return queue[1]; 6Wl+5 a6V
} A?=g!(wB
4Z,MqG>
public void remove() { I!~5.
SortUtil.swap(queue,1,size--); Ap=LlZ
fixDown(1); 5?{a=r9
} xh,};TS(K
file://fixdown b 'jZ4{+W
private void fixDown(int k) { [td)v,
int j; /0IvvD!7N
while ((j = k << 1) <= size) { !K'j[cA^
if (j < size %26amp;%26amp; queue[j] j++; u,I_p[`E
if (queue[k]>queue[j]) file://不用交换 8HDYA$L
break; N*y09?/h
SortUtil.swap(queue,j,k); k?ZtRhPu3X
k = j; FWNWOU
} a"@k11
} hOG9
private void fixUp(int k) { &'Pwz
while (k > 1) { @m[q0G}
int j = k >> 1; B&3oo
if (queue[j]>queue[k]) F jsnFX;
break; |uf{:U)
SortUtil.swap(queue,j,k); n]S DpptM
k = j; ya.!zGH
} `f?v_Ui-$
} *:L-/Q)i
>]s\%GO
} }86&? 0j.
d^p af
} Er509zZ,[
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SortUtil： Y>W$n9d&G2
Q$u&/g3NvL
package org.rut.util.algorithm; |,#DB
O<}3\O )G(
import org.rut.util.algorithm.support.BubbleSort; /Y|y0iK
import org.rut.util.algorithm.support.HeapSort; }81eef4$S
import org.rut.util.algorithm.support.ImprovedMergeSort; P5-1z&9O
import org.rut.util.algorithm.support.ImprovedQuickSort; -hL0}Wy$N
import org.rut.util.algorithm.support.InsertSort; !'scOWWn
import org.rut.util.algorithm.support.MergeSort; ;r<(n3"F
import org.rut.util.algorithm.support.QuickSort; ML eo3
import org.rut.util.algorithm.support.SelectionSort; max 5s$@
import org.rut.util.algorithm.support.ShellSort; ]:H((rk
}Rl^7h<!
/** I!LSDi3
* @author treeroot "wwAbU<
* @since 2006-2-2 ;6+e!h'1
* @version 1.0 DNTkv_S
*/ "$P|!k45(
public class SortUtil { )\K;Ncp[
public final static int INSERT = 1; n`v;S>aT
public final static int BUBBLE = 2; -o: ifF|
public final static int SELECTION = 3; +ftOJFkI
public final static int SHELL = 4; hv.33l
public final static int QUICK = 5; "&9L
public final static int IMPROVED_QUICK = 6; F"I{_yleq'
public final static int MERGE = 7; b{+7sl
public final static int IMPROVED_MERGE = 8; \Dn47V{7-
public final static int HEAP = 9; WxE^S ??|
y&A0}>a:d
public static void sort(int[] data) { I7=g8/JD
sort(data, IMPROVED_QUICK); hKx*V"7/#\
} $!Qv f
private static String[] name={ nf%"7y{dd
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" BIJlU(aF
}; %KjvV<f-a
;pH&YBY
private static Sort[] impl=new Sort[]{ *HC[LM
new InsertSort(), H]I^?+)9
new BubbleSort(), C4,;l^?=%
new SelectionSort(), D6Q6yNE
new ShellSort(), 27"M]17)
new QuickSort(), 6x]x>:8
new ImprovedQuickSort(), S`w_q=-^8
new MergeSort(), OCX>LK!K
new ImprovedMergeSort(), l^~E+F~
new HeapSort() 0aWy!d
}; b '9L}q2m
@gc|Z]CV
public static String toString(int algorithm){ I38j[Xk
return name[algorithm-1]; 31cC*
} ezz;NH
7RpAsLH=
public static void sort(int[] data, int algorithm) { *X%dg$VcV
impl[algorithm-1].sort(data); Uo<iZ3J
} 03)R_A
i!nPiac
public static interface Sort { Sd9%tO9mf
public void sort(int[] data); n1E^8[~'
} C@P4}X0,=
:nLhg$wMs
public static void swap(int[] data, int i, int j) { =Rw-@*#l
int temp = data; d*cAm$
data = data[j]; USDqh437
data[j] = temp; _yH=w'8.
} VV%Q "0\
} Nn:>c<[