[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; sa])^mkq(
} FeJ5^Gh.
int i1=l; ^ TS\x/P
int i2=mid+1; |,crQ'N'
for(int cur=l;cur<=r;cur++){ hR2.w/2j
if(i1==mid+1) "~6BC
data[cur]=temp[i2++]; ~f:fOrLE#
else if(i2>r) ah.Kb(d:
data[cur]=temp[i1++]; shRvwE[
else if(temp[i1] data[cur]=temp[i1++]; dEnhNPeRl
else wO9<An
data[cur]=temp[i2++]; >Ww F0W9?
} V^D#i(5
} 9v A`\\9
-=Hr|AhE
} .0 K8h:I
go@}r<B$
改进后的归并排序: +oa]v1/W
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package org.rut.util.algorithm.support; zq#o8))4X
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import org.rut.util.algorithm.SortUtil; 4C$,X!kzF
J&?kezs
/** aNz%vbh\
* @author treeroot RDbA"e5x
* @since 2006-2-2 }`X$ '
* @version 1.0 )8_0d)
*/ qvT9d7x
public class ImprovedMergeSort implements SortUtil.Sort { JeO(sj$e
!rXyw`6N
private static final int THRESHOLD = 10; Q{>{ e3z}
m\Dbb.vBvW
/* e]rWR
* (non-Javadoc) kweypIB
* U*6r".sz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Pp}j=$&j\
*/ < B'BlqTS
public void sort(int[] data) { j/9'L^]
int[] temp=new int[data.length]; #vIF]Y
mergeSort(data,temp,0,data.length-1); gn'. 9";j
} *t~(_j
E")82I
private void mergeSort(int[] data, int[] temp, int l, int r) { xY@V.
int i, j, k; HQ]g{JVld\
int mid = (l + r) / 2; b,I$.&BD
if (l == r) IAg#YFI
return; { c]y<q
if ((mid - l) >= THRESHOLD) f 1]1ZOb
mergeSort(data, temp, l, mid); +}%4]O;
else 'H97D-86/
insertSort(data, l, mid - l + 1); Lg-Sxz}P!
if ((r - mid) > THRESHOLD) )y._]is)b
mergeSort(data, temp, mid + 1, r); mI}1si=$
else @'dtlY5;
insertSort(data, mid + 1, r - mid); ,zO!`|I
u>d,6 !
for (i = l; i <= mid; i++) { $O=m/l$
temp = data; iFpJ/L
} U#-89.x
for (j = 1; j <= r - mid; j++) { 0Ez(;4]3
temp[r - j + 1] = data[j + mid]; ' m^nKG$"
} (t[sSl
int a = temp[l]; 'ip2|UG
int b = temp[r]; wjEyU:
for (i = l, j = r, k = l; k <= r; k++) { f(SK[+aqW
if (a < b) { L/*D5k%J
data[k] = temp[i++]; `|&#=hl~
a = temp; {mOQRAKl
} else { C6` Tck!
data[k] = temp[j--]; }o,-@R~
b = temp[j]; q#C;iK4
} ?2q4dx0
} r&rip^40
} r{mj[N'@
y).dw(
/** 4>R)2g
* @param data ]Y;5U
* @param l ka=EOiX.
* @param i KATu7)e&~^
*/ K&'Vd@
private void insertSort(int[] data, int start, int len) { u,~/oTgO
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); XU5GmGu_+
} nI_UL
} Gg TrIF
} 3q-Xj:FP
} 3sD/4 ?
_ci8!PP
堆排序： ssY5g !%
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package org.rut.util.algorithm.support; nq%GLUH
XlJA}^e
import org.rut.util.algorithm.SortUtil; uz;zmK
HRg< f= oz
/** D}T+X;u)K
* @author treeroot S; Fj9\2)I
* @since 2006-2-2 +/U6p!
* @version 1.0 / n@by4;W
*/ IeT1Jwe
public class HeapSort implements SortUtil.Sort{ Lq#$q>!K
3[Z7bhpV
/* (non-Javadoc) 6Eu"T9(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /NB;eV?
*/ Y]neTX [ef
public void sort(int[] data) { @)x8<
MaxHeap h=new MaxHeap(); Nhrh>x[wJ
h.init(data); FA$1&Fu3Y
for(int i=0;i h.remove(); fI }v}L^
System.arraycopy(h.queue,1,data,0,data.length); %Z-B{I(
} p<8Ga.kiN
4l?"zv1
private static class MaxHeap{ mvXIh";
D<J,3(Yu
void init(int[] data){ VRA0p[
this.queue=new int[data.length+1]; 7-j=he/
for(int i=0;i queue[++size]=data; u&Cu"-%=M
fixUp(size); q~6((pWi|
} [DSD[[ z[
} M]uO%2
XAb-K?)
private int size=0; LWIPq"
l~'NqmXe
private int[] queue; JG*Lc@Q
859ID8F
public int get() { 56!/E5qgW
return queue[1]; i1ss}JJp*
} V[fcP;
!_pryNcb
public void remove() { {Ax{N
SortUtil.swap(queue,1,size--); KiYz]IM$4
fixDown(1); 2>h.K/pC
} |P`:NAf2
file://fixdown "2>_eZ#b
private void fixDown(int k) { G21cJi*
int j; a9niXy}a(
while ((j = k << 1) <= size) { b@m\ca
if (j < size %26amp;%26amp; queue[j] j++; t8\XOj
if (queue[k]>queue[j]) file://不用交换 e9@7GaL`"S
break; kZJ.G
SortUtil.swap(queue,j,k); <yz&> +9,
k = j; ^*A8 NdaB
} G~fM!F0
} 1@vlbgLr@
private void fixUp(int k) { W*/0[|n*
while (k > 1) { wR*>9LjeG
int j = k >> 1; >YuiCf?c7
if (queue[j]>queue[k]) <Zn-P
break; qt{{q
SortUtil.swap(queue,j,k); eV)'@8p
k = j; dyNKok#
} FEzjP$
} afNqK~
s+l3]Hd
} /swNhDQ"o
Hd9vS"TN]
} ERQc1G]3Dd
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SortUtil： xQK;3b
]|PDsb"e
package org.rut.util.algorithm; 1Zj NRg=
!.}ZlA
import org.rut.util.algorithm.support.BubbleSort; /;rPzP4K6
import org.rut.util.algorithm.support.HeapSort; <4m@WG
import org.rut.util.algorithm.support.ImprovedMergeSort; {} gr\
import org.rut.util.algorithm.support.ImprovedQuickSort; wSwDhOX=
import org.rut.util.algorithm.support.InsertSort; cN(Toj'`
import org.rut.util.algorithm.support.MergeSort; ~qP_1() ?
import org.rut.util.algorithm.support.QuickSort; QaYUcma~n
import org.rut.util.algorithm.support.SelectionSort; 4Cn% h)w
import org.rut.util.algorithm.support.ShellSort; xG|T_|?
U1!#TD)@
/** W-UMX',0zS
* @author treeroot -fILXu
* @since 2006-2-2 ]/klKqz
* @version 1.0 |*5803h
*/ Tb@r@j:V
public class SortUtil { HZDeQx`*s
public final static int INSERT = 1; YR)^F|G
public final static int BUBBLE = 2; +\vN#xDz
public final static int SELECTION = 3; Ax4;[K\Q
public final static int SHELL = 4; e.|t12)L "
public final static int QUICK = 5; g(F2IpUm/
public final static int IMPROVED_QUICK = 6; |A H@W#7j
public final static int MERGE = 7; GlT/JZ9
public final static int IMPROVED_MERGE = 8; '?E@H.""
public final static int HEAP = 9; ?CpM.{{s
`_{,4oi
public static void sort(int[] data) { woU3WS0
sort(data, IMPROVED_QUICK); <9Ytv|t@0
} ;|CG9|p
private static String[] name={ h{PJ4U{W
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?&b"/sRS
}; ^P*+0?aFr
YgkQF0+
private static Sort[] impl=new Sort[]{ tQ2S*]"f
new InsertSort(), %S%0/
new BubbleSort(), cdfnM%`>\
new SelectionSort(), zOL*XZ0c
new ShellSort(), 1[". z{V3*
new QuickSort(), R9Y{kk0M
new ImprovedQuickSort(), M[&p[P@
new MergeSort(), Sr6?^>A@t
new ImprovedMergeSort(), vLcOZ^iK
new HeapSort() c=IjR3F
}; i#Fe`Z ~J
'/F~vSQsR
public static String toString(int algorithm){ 9/5EyV
return name[algorithm-1]; JjQTD-^
} 5R#:ALwX:
'i8?]` T
public static void sort(int[] data, int algorithm) { "(E%JAwZ^W
impl[algorithm-1].sort(data); ?D=%k8)Y
} O}[){*GG=
~*G}+Ur$2
public static interface Sort { bKPjxN?!9
public void sort(int[] data); _dn*H-5hO
} G)7J$4R
`>{S?t<
public static void swap(int[] data, int i, int j) { g);.".@"
int temp = data; RS Vt
data = data[j]; `qr.@0whP
data[j] = temp; 8)&J oPN
} KU;m.{
} ~RnBs`&!