[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; Q.Ljz Z
} i@XFnt
int i1=l; CHRO9
int i2=mid+1; oc3}L^aD
for(int cur=l;cur<=r;cur++){ (N25.}8Y
if(i1==mid+1) '=eE6=m^K
data[cur]=temp[i2++]; <FFaaGiE>
else if(i2>r) Rk.GrLp
data[cur]=temp[i1++]; vswBK-w(Z
else if(temp[i1] data[cur]=temp[i1++]; [v$NxmRu
else D&r2k 9
data[cur]=temp[i2++]; J=qPc}+
} H0.,h;
} }8cX0mZ1j
$1$T2'C~+
} <"XDIvpc%L
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改进后的归并排序: +O,h<*y
FI$#x%A
package org.rut.util.algorithm.support; jB-)/8.qk
Z6vm!#\
import org.rut.util.algorithm.SortUtil; h8lI#Gs
pe1_E KU
/** B 8ycr~
* @author treeroot ~NtAr1
* @since 2006-2-2 qxe%RYdA'j
* @version 1.0 8^Ov.$rP
*/ j,/t<@S>
public class ImprovedMergeSort implements SortUtil.Sort { L7lRh=D
E[RLBO[*n
private static final int THRESHOLD = 10; a\PvRW*I
M:Aik&
/* E5b JIC(
* (non-Javadoc) p-t*?p C
* Ma`Goi\vFk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?hQ,'M2
*/ WaRYrTDv64
public void sort(int[] data) { 1"82JN|!
int[] temp=new int[data.length]; #)xg$9LQb
mergeSort(data,temp,0,data.length-1); GI:$(<
} *jF VYg
g$f;
private void mergeSort(int[] data, int[] temp, int l, int r) { 8>|@O<2\
int i, j, k; HBFuA.",
int mid = (l + r) / 2; =_L
if (l == r) 8/y~3~A{D
return; U@$=0*
if ((mid - l) >= THRESHOLD) I2wT]L UV
mergeSort(data, temp, l, mid); 'Na/AcRdg
else _Vq7Gxy$R
insertSort(data, l, mid - l + 1); UUt631
if ((r - mid) > THRESHOLD) mxRe2<W
mergeSort(data, temp, mid + 1, r); S-Y(Vn4
else `(9B(&t^,
insertSort(data, mid + 1, r - mid); |e@Bi#M[
6v9{$:
for (i = l; i <= mid; i++) { O<x53MN^
temp = data; +RO=a_AS
} .ZxH#l _
for (j = 1; j <= r - mid; j++) { 6GD Uo}.
temp[r - j + 1] = data[j + mid]; S0ct;CS
} j8G>0f)
int a = temp[l]; %T&#JF+;
int b = temp[r]; ",ic" ~
for (i = l, j = r, k = l; k <= r; k++) { /e5Fx
if (a < b) { jnoFNIW
data[k] = temp[i++]; ):_x
a = temp; d%istFL)
} else { L^`oJ9k!
data[k] = temp[j--]; 995^[c1o6
b = temp[j]; N -]m <z>
} y{eZrX|
} }<wj~f([
} R<!WW9IM
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/** rGZ@pO2
* @param data IP1|$b}sq
* @param l C3%,pDh
* @param i Te{L@sj
*/ uK?T<3]'
private void insertSort(int[] data, int start, int len) { $Q:5KNF+p
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); JHf}LZu
} iDO~G($C
} hfvs'.
} e;=G|E
} ?nFT51t/4
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堆排序： P-~Avb
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package org.rut.util.algorithm.support; #oYX0wvl
9tS&$-
import org.rut.util.algorithm.SortUtil; >NwrJSx
u%O^hcfb
/** 'FBvAk6
* @author treeroot J<_&f_K0]
* @since 2006-2-2 l!ye\
* @version 1.0 aAko-,URC
*/ ?.A6HrAPB
public class HeapSort implements SortUtil.Sort{ 'ce9v@(0
$`'^&o;&f
/* (non-Javadoc) <,0&Ox
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tS2lex%
*/ eT+MN`
public void sort(int[] data) { 5b B[o6+
MaxHeap h=new MaxHeap(); -o#0Yt}3
h.init(data); >?e*;f$VdJ
for(int i=0;i h.remove(); e_6 i896
System.arraycopy(h.queue,1,data,0,data.length); |y%pP/;&!
} 0;TMwE
sZ'3PNpCP
private static class MaxHeap{ O)5-6lm
!00%z
void init(int[] data){ ,XP9NHE
this.queue=new int[data.length+1]; i=2+1;K
for(int i=0;i queue[++size]=data; #U/B,`= >
fixUp(size); 2$NP46z}
} RpLm'~N'
} q@(N 38D
]?)zH:2)
private int size=0; PJAir8
}qz58]fyx
private int[] queue; ;T52aX
)KRO=~Y
public int get() { q#\eL~k
return queue[1]; WaMn[/{
} d(a6vEL4
Iz{AA-
public void remove() { ((dG<
SortUtil.swap(queue,1,size--); .^kTb2$X
fixDown(1); l:@.D|(o3
} I)B2Z(<Q
file://fixdown m Xw1%w[*
private void fixDown(int k) { #8/Z)-G
int j; dy`~%lX?
while ((j = k << 1) <= size) { 1xtbhk]D
if (j < size %26amp;%26amp; queue[j] j++; Vxgc|E^J
if (queue[k]>queue[j]) file://不用交换 )QZ?Bf
break; 6ldDt?iSg
SortUtil.swap(queue,j,k); fQx 4/4j
k = j; R4qk/@]t
} b'-gy0
} 5?vIkf
private void fixUp(int k) { j#p3c
while (k > 1) { G#% =R`k/
int j = k >> 1; 56':U29.]
if (queue[j]>queue[k]) Nq~bO_-I
break; ZRxB"a'
SortUtil.swap(queue,j,k); i&LbSxUh9
k = j; r?V|9B`$p
} mU&J,C
} +vbNZqwz
4t8 Hy
} Vfw$>og!
jY?%LY@5I
} E_yh9lk
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SortUtil： ?y04g u6p
:!A@B.E
package org.rut.util.algorithm; z(%Zji@!N
W4YC5ZH{l
import org.rut.util.algorithm.support.BubbleSort; 4*dT|NU
import org.rut.util.algorithm.support.HeapSort; "1#,d#Q$
import org.rut.util.algorithm.support.ImprovedMergeSort; 1%=,J'AH
import org.rut.util.algorithm.support.ImprovedQuickSort; i'EXylb
import org.rut.util.algorithm.support.InsertSort; 7I.[1V`
import org.rut.util.algorithm.support.MergeSort; \dc`}}Lc
import org.rut.util.algorithm.support.QuickSort; gh 0\9;h
import org.rut.util.algorithm.support.SelectionSort; L|H{;r'
import org.rut.util.algorithm.support.ShellSort; z`_N|iEd
da<1,hF
/** FP\[7?ZLn
* @author treeroot (^Ln|3iz
* @since 2006-2-2 -zTeIvcy5
* @version 1.0 )t.q[O`
*/ >ab=LDoM
public class SortUtil { :D/R
public final static int INSERT = 1; n_+Iw,a'm
public final static int BUBBLE = 2; <St`"H
public final static int SELECTION = 3; (HJ60Hj
public final static int SHELL = 4; Yp;x
public final static int QUICK = 5; "{:*fI;!
public final static int IMPROVED_QUICK = 6; 7vWB=r>5@
public final static int MERGE = 7; ~gAx
public final static int IMPROVED_MERGE = 8; }z*p2)v`
public final static int HEAP = 9; R`<E3J\*
[lJ[kr*7
public static void sort(int[] data) { z DK+8
sort(data, IMPROVED_QUICK); bIhL!Ty T.
} +*!!
private static String[] name={ RcE%?2lD
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]zm6;/S
}; ~>EVI=?
>]`x~cE.5
private static Sort[] impl=new Sort[]{ OL=bhZ
new InsertSort(), BxG;vS3>*e
new BubbleSort(), `<Ftn
new SelectionSort(), K4tX4U[Z
new ShellSort(), >ylVES/V
new QuickSort(), 5u!cA4e"
new ImprovedQuickSort(), doa$ ;=wg
new MergeSort(), Q7s1M&K
new ImprovedMergeSort(), {%$=^XO
new HeapSort() mU_O64
}; 8L@di Y
04"hQt{[
public static String toString(int algorithm){ GQQ!3LwP\O
return name[algorithm-1]; ])JJ`Z8Bk
} n-Xj>
=sm(Z;"
public static void sort(int[] data, int algorithm) { YUH/tl
impl[algorithm-1].sort(data); M1i|qjb:l
} Psv!`K
xWMMHIu
public static interface Sort { 'SY&-<t(
public void sort(int[] data); 3_>R's8P
} }0TY
F,bl>;{[{
public static void swap(int[] data, int i, int j) { ,)RdXgCs
int temp = data; h Na<LZ
data = data[j]; wVVe L$28
data[j] = temp; AjS5
} oMVwIdf
} j{PX ~/