[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; ~Q5]?ZNX
} [)il_3t
int i1=l; {s8g;yU5
int i2=mid+1; igEqty!.
for(int cur=l;cur<=r;cur++){ 0uIBaW3s
if(i1==mid+1) &|' NDcp
data[cur]=temp[i2++]; irP*:QM
else if(i2>r) :^`WrcOJ
data[cur]=temp[i1++]; FYb]9MX
else if(temp[i1] data[cur]=temp[i1++]; 4,?beA
else 'I:_}q
data[cur]=temp[i2++]; Bwu?DK
} IkxoW:L
} `$FB[Z} &
j`K0D65
} ,?`kYPZ
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改进后的归并排序: [Dmf.PUe
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package org.rut.util.algorithm.support; R<%{I)
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import org.rut.util.algorithm.SortUtil; ooP{Q r
o 9(x\g
/** j8]M}Q$
* @author treeroot P>$+XrTE
* @since 2006-2-2 Om_ "X6
* @version 1.0 hh2&FI
*/ ]z| 2
public class ImprovedMergeSort implements SortUtil.Sort { MXjN./
K@/dQV%Z
private static final int THRESHOLD = 10; )-Z*/uF^
Y kvEQ=
/* :nfy=*M#
* (non-Javadoc) ~yV?*"Hi
* 1=ZQRJW0B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1^ go)(Mx
*/ }lCQ+s!
public void sort(int[] data) { bH:C/P<x
int[] temp=new int[data.length]; hlz/TIP^N3
mergeSort(data,temp,0,data.length-1); 4/v[.5
} V|*3*W
UIU6rilB
private void mergeSort(int[] data, int[] temp, int l, int r) { 7]i6 Gk
int i, j, k; 8dJ+Ei~M
int mid = (l + r) / 2; fhNJB0
if (l == r) !89hO4 0r
return; gvL*]U7
if ((mid - l) >= THRESHOLD) S,f#g?V
mergeSort(data, temp, l, mid); 91DevizXx
else z46Sh&+
insertSort(data, l, mid - l + 1); =h+-1zp{M^
if ((r - mid) > THRESHOLD) =kzHZc
mergeSort(data, temp, mid + 1, r); U-U(_W5&
else .Yz^r?3t
insertSort(data, mid + 1, r - mid); +ZFN8
M&sQnPFH
for (i = l; i <= mid; i++) { NLUO{'uUW
temp = data; t**d{P+
} m9]Ge]
for (j = 1; j <= r - mid; j++) { Rm6i[y&
temp[r - j + 1] = data[j + mid]; oZdY0nh4
} (E~6fb"c
int a = temp[l]; ZS`Kj(D
int b = temp[r]; zsR5"Vi=
for (i = l, j = r, k = l; k <= r; k++) { =.JcIT'
if (a < b) { dP>FXgY
data[k] = temp[i++]; gv i!|!M=
a = temp; # @7I
} else { g_?Q3
data[k] = temp[j--]; )n[=)"rf
b = temp[j]; DbtkWq%
} 6\.LG4@LO
} \'|t>|zhp
} $Il
}wI+eMr
/** $ub0$S/Hu
* @param data VN$7r
* @param l YkFERIa076
* @param i ,p!IFS`
*/ Dd-a*6|x
private void insertSort(int[] data, int start, int len) { Uv~|Xj4.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); mHJGpJ=a-
} $1Wb`$
} 5fz K*[B
} ZCMH?>
} 8@RJ>
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堆排序： $@L2zl1
WMWUP ZsGS
package org.rut.util.algorithm.support; fvV"H{V,
>;VZB/d
import org.rut.util.algorithm.SortUtil; #q-fRZ:P
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/** /s+S\ djk
* @author treeroot -"^xg"
* @since 2006-2-2 rhly.f7N=A
* @version 1.0 ug;~dhe~
*/ {kb7u5-
public class HeapSort implements SortUtil.Sort{ (.L?sDQ</z
1TF S2R n
/* (non-Javadoc) BHErc\ITP
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ![J_6f}!
*/ ~k}O"{ y
public void sort(int[] data) { SUW=-M
MaxHeap h=new MaxHeap(); x3.,zfWs
h.init(data); j*;.>akY7
for(int i=0;i h.remove(); \~t!M~H
System.arraycopy(h.queue,1,data,0,data.length); TmM~uc7mj
} %az6\"n
H$pgzNL
private static class MaxHeap{ ?IoA;GBg
mZuLwd$0
void init(int[] data){ ,WM-%2z^4I
this.queue=new int[data.length+1]; lvNi/jk
for(int i=0;i queue[++size]=data; $xF[j9nM
fixUp(size); _N>#/v)Yi
} _+~&t9A!
} >hV2p/D
VWzuV&;P
private int size=0; b):aqRwP
qZv@ULluc
private int[] queue; Kltqe5
Wt=@6w&
public int get() { 'C#[iRG4
return queue[1]; k2PK4Ua_}q
} Z)@[N 6\?
>ffC?5+
public void remove() { 9]1LwX!M2
SortUtil.swap(queue,1,size--); *X}2
fixDown(1); s#")hMJQ
} D(&WEmm\B
file://fixdown F~bDg tN3
private void fixDown(int k) { iM6(bmc.
int j; b*{UO
while ((j = k << 1) <= size) { $jv"$0Fc
if (j < size %26amp;%26amp; queue[j] j++; uY/CiTWr
if (queue[k]>queue[j]) file://不用交换 |`{$Ego:
break; [X8EfU}
SortUtil.swap(queue,j,k); #v9+9X`1L
k = j; IY mkZ?cW
} HS\'{4P
} bw+IH-b
private void fixUp(int k) { "pH;0[r]
while (k > 1) { ' ~fP#y
int j = k >> 1; v\?l+-A?y
if (queue[j]>queue[k]) ;cp||uO
break; CVEo<Tz
SortUtil.swap(queue,j,k); 82?LZ?!PD
k = j; @L0)k^:
} !(Q@1c&z
} >B*zzj
p<wC{D
} O'3/21)|y
0($On`#
} 6E^9>
j#Lj<jX!xR
SortUtil： FP*kA_z$
FT-=^VA\
package org.rut.util.algorithm; }n'W0Sa
t)~$p#NS
import org.rut.util.algorithm.support.BubbleSort; V{x[^+w7X~
import org.rut.util.algorithm.support.HeapSort; tYSfeU
import org.rut.util.algorithm.support.ImprovedMergeSort; GZY:EHuz[
import org.rut.util.algorithm.support.ImprovedQuickSort; 2 &_>2"=<@
import org.rut.util.algorithm.support.InsertSort; &fU48n1Uh
import org.rut.util.algorithm.support.MergeSort; nQa:t. rC
import org.rut.util.algorithm.support.QuickSort; YQD/vc~8G
import org.rut.util.algorithm.support.SelectionSort; c"t&,OU:
import org.rut.util.algorithm.support.ShellSort; !67xN?b
\b$Y_
/** GJHJ?^%
* @author treeroot f;Ijl0d@
* @since 2006-2-2 t}OzF cyqN
* @version 1.0 1F3Q^3+
*/ 2k&Voa
public class SortUtil { Pt-O1$C[
public final static int INSERT = 1; aYWUwYB$
public final static int BUBBLE = 2; kX:1=+{xg
public final static int SELECTION = 3; W`TSR?4~t?
public final static int SHELL = 4; `gJ$fTi&
public final static int QUICK = 5; T,PN6d
public final static int IMPROVED_QUICK = 6; e#F3KLSL`
public final static int MERGE = 7; l7IF9b$c
public final static int IMPROVED_MERGE = 8; 2pP"dX
public final static int HEAP = 9; k5+ Fxf
t'.:"H8BI
public static void sort(int[] data) { }9;mtMR$
sort(data, IMPROVED_QUICK); }LLQ+
} 5 [4{1v
private static String[] name={ 4nh0bIN1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" soX^$l
}; Ae1b`%To
t"e%'dFv
private static Sort[] impl=new Sort[]{ ];N/KHeZ
new InsertSort(), PpF`0w=1%l
new BubbleSort(), |)*!&\Ch
new SelectionSort(), hFhC&2HN
new ShellSort(), ,wv>G]v
new QuickSort(), hPCSAo!|
new ImprovedQuickSort(), #MiO4zXgd
new MergeSort(), 8+32hg@^F
new ImprovedMergeSort(), we@*;k@_
new HeapSort() B7oUS}M
}; 2=1qmQE
kqq1;Kd
public static String toString(int algorithm){ s;]"LD@
return name[algorithm-1]; gi)C5J4
} :7(d6gEL
7| j rk
public static void sort(int[] data, int algorithm) { $Q,]2/o6n
impl[algorithm-1].sort(data); ;M\Cw.%![
} 5Kk}sxol
L%-ENk
public static interface Sort { +"~*L,ken0
public void sort(int[] data); M8y|Lm}o
} 1(%6X*z
Ub4)x
public static void swap(int[] data, int i, int j) { 8H8Q
int temp = data; \]\h,Y8
data = data[j]; ?`6Mfpvj96
data[j] = temp; t?=V<Yd1
} 4\uq$.f-
} ^$RpP+d