[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; h9L/.>CX
} >n^[-SWJCT
int i1=l; >On"BP# U
int i2=mid+1; &24z`ZS[w6
for(int cur=l;cur<=r;cur++){ h9 &V
if(i1==mid+1) hz_F^gF
data[cur]=temp[i2++]; v"a.%"oN8
else if(i2>r) O:3DIT1#>
data[cur]=temp[i1++]; n32.W?9
else if(temp[i1] data[cur]=temp[i1++]; esVZ2_eL
else v\?J$Hdd
data[cur]=temp[i2++]; Ffp<|2T2_
} 5.e. BT
} Pb-Ft=
v<U +&D{
} M~&X?/8
>E3 lY/[
改进后的归并排序: <<[hZ$.
p~w|St7jg
package org.rut.util.algorithm.support; *=ymK*
&BDdJwE
import org.rut.util.algorithm.SortUtil; 2r|!:^'?W
qEbzF#a-:
/** k_<8SG+`
* @author treeroot _z3YB
* @since 2006-2-2 `Gp!Y
* @version 1.0 edy6WzxBcm
*/ oPA [vY
public class ImprovedMergeSort implements SortUtil.Sort { Ho:X.Z9A^
!1\jD
private static final int THRESHOLD = 10; DfQD!}=
az2CFd^M
/* H;OPA8\n
* (non-Javadoc) f:-dw6a=s
* U\Hd?&`9gz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SZm)`r\A
*/ >av.pJ(>
public void sort(int[] data) { ';z5]O~
int[] temp=new int[data.length]; K2GcU_*t
mergeSort(data,temp,0,data.length-1); H^no&$2`1
} GxIw4m9
[d_sd
private void mergeSort(int[] data, int[] temp, int l, int r) { zsx12b^w
int i, j, k; hj.Du+1
int mid = (l + r) / 2; sR1 &2hB
if (l == r) Z|kMoB
return; >O{/%(9
if ((mid - l) >= THRESHOLD) uF=xo`=|
mergeSort(data, temp, l, mid); $ (gR^L
else @GiR~bKZ
insertSort(data, l, mid - l + 1); D< 4!7*9%
if ((r - mid) > THRESHOLD) nBVknyMFNF
mergeSort(data, temp, mid + 1, r); !7K-Kqn
else xf.2Ig
insertSort(data, mid + 1, r - mid); FiQx5}MMhu
5E+k}S]M$
for (i = l; i <= mid; i++) { KQ x<{-G6
temp = data; +i[w& P
} Xkv+"F=-
for (j = 1; j <= r - mid; j++) { Qb|.;_
temp[r - j + 1] = data[j + mid]; ,T|%vqbmw
} &Tf R].
int a = temp[l]; S}hg*mWn{$
int b = temp[r]; nd]AvVS
for (i = l, j = r, k = l; k <= r; k++) { ]cv|A^
if (a < b) { 0+\~^
data[k] = temp[i++]; ?Ze3t5Ll
a = temp; |UO1vA@
} else { 2.K"+%
data[k] = temp[j--]; {mp;^/O`er
b = temp[j]; jnoFNIW
} q$Ol"K@
} [i'\d}
} DvuL1MeKo
zq5_&AeW
/** )^&)f!f
* @param data B`4[@$
* @param l %-4e8d74/
* @param i sKX%<n$
*/ S"=oU}'|
private void insertSort(int[] data, int start, int len) { eXU;UO^
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^w<:UE2a!
} `f:5w^A
} a`w)awb
} Kup-O u,
} >Q~"/-bN)
!HXdUAKu
堆排序： +M\*C#
] 05Q4
package org.rut.util.algorithm.support; BX),U
tc{23Rf%
import org.rut.util.algorithm.SortUtil; b'N"?W^YQ
_OF8D
/** 2#Au6BvX
* @author treeroot ~X;(m<f2
* @since 2006-2-2 #oYX0wvl
* @version 1.0 9tS&$-
*/ >NwrJSx
public class HeapSort implements SortUtil.Sort{ u%O^hcfb
fxLhVJ"b
/* (non-Javadoc) `,(1'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LwUvM
*/ (D8'qx-M
public void sort(int[] data) { v]*W*;
MaxHeap h=new MaxHeap(); )_EobE\
h.init(data); Ze$:-7Czl
for(int i=0;i h.remove(); 7l Aa6"Y68
System.arraycopy(h.queue,1,data,0,data.length); ji(S ?^
} D0QXvrf
t:M({|m Y
private static class MaxHeap{ sI`i
UhCd,
void init(int[] data){ a~ REFy
this.queue=new int[data.length+1]; =]E1T8|
for(int i=0;i queue[++size]=data; cQPH le2
fixUp(size); T6H"ER$
} iA ZtV'VQ)
} &TbnZnv
!wrl.A/P
private int size=0; Dz)bP{iq"
bi^LpyEn
private int[] queue; i6m;2 UAa
U(./LrM05
public int get() { xDr *|d
return queue[1]; 1'_OM h*;
} t*Q12Q
'd?8OV
public void remove() { PfrW,R~r
SortUtil.swap(queue,1,size--); JsPuxu_
fixDown(1); :OI!YR%"
} v2@M,xbxF:
file://fixdown Fr%KO)s2
private void fixDown(int k) { udc9$uO
int j; `%ymg8^
while ((j = k << 1) <= size) { 0/KNXz
if (j < size %26amp;%26amp; queue[j] j++; 1shvHmrV
if (queue[k]>queue[j]) file://不用交换 !#iP)"O
break; w#b~R^U
SortUtil.swap(queue,j,k); TU. h
k = j; # |UrHK;
} m dC. FO-
} G>_ZUHdI
private void fixUp(int k) { &P{%C5?{
while (k > 1) { */8\Z46z
int j = k >> 1; @pkozE-
if (queue[j]>queue[k]) FySK&
break; 98O z
SortUtil.swap(queue,j,k); U3U eTa_
k = j; Bv=Z*"Fv
} rfPJBD{Ve
} *pWswcV/
<g%xo"
} ;%82Z4
d#z67Nl6
} "{0kg'fU
ng 6G<hi
SortUtil： TOuFFR
=C:0='a
package org.rut.util.algorithm; R\+$^G}#6
>$"bwr}'4B
import org.rut.util.algorithm.support.BubbleSort; /cjf 1Dc
import org.rut.util.algorithm.support.HeapSort; H+0 *
import org.rut.util.algorithm.support.ImprovedMergeSort; Aqm0|GlJ
import org.rut.util.algorithm.support.ImprovedQuickSort; L"b5P2{c
import org.rut.util.algorithm.support.InsertSort; ?4~lA L1
import org.rut.util.algorithm.support.MergeSort; Kc{wv/6}T
import org.rut.util.algorithm.support.QuickSort; T@S+5(
import org.rut.util.algorithm.support.SelectionSort; ]jYl:41yI
import org.rut.util.algorithm.support.ShellSort; dvj`%?=
,,iQG' *
/** "M*\,IH
* @author treeroot '/p5tw8
* @since 2006-2-2 l`u*,"$
* @version 1.0 E|fPI u
*/ G37_ `C
public class SortUtil { -J6}7>4^8}
public final static int INSERT = 1; BW*zj=N%
public final static int BUBBLE = 2; }gn0bCJy
public final static int SELECTION = 3; <=`@`rm{
public final static int SHELL = 4; ,#m\W8j
public final static int QUICK = 5; L`p[Dq.
public final static int IMPROVED_QUICK = 6; 5s|gKM
public final static int MERGE = 7; Cv=0&S.
public final static int IMPROVED_MERGE = 8; lubS{3<
public final static int HEAP = 9; @rdC/=Y[
fAm2ls7c
public static void sort(int[] data) { l-npz)EM
sort(data, IMPROVED_QUICK); lwB!ti
} s-DtkO
private static String[] name={ w])Sz*J
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &S{F"z
}; oc?VAF
&KB{,:)?
private static Sort[] impl=new Sort[]{ U9q*zP_jV
new InsertSort(), c*W$wr
new BubbleSort(), .KD07
new SelectionSort(), YJ0[BcZ
new ShellSort(), [+1 i$d
new QuickSort(), G@(7d1){
new ImprovedQuickSort(), R's xa*VB
new MergeSort(), $200?[
new ImprovedMergeSort(), Ylf4q/-
new HeapSort() S&0x:VW
}; =osj}(
^m7PXY
public static String toString(int algorithm){ ,s)H%
return name[algorithm-1]; ~E\CAZ
} ^q6~xC,/
x{- caOH
public static void sort(int[] data, int algorithm) { +1y#=iM{
impl[algorithm-1].sort(data); {xr]xcM'b
} Il642#Gh
(/Mc$V
public static interface Sort { 6 qq7:
public void sort(int[] data); Em7q@
} wVVe L$28
jL8zH
public static void swap(int[] data, int i, int j) { /IC'R"V a
int temp = data; Zry>s0
data = data[j]; 7MfT~v
data[j] = temp; tX_eN
} q}!4b'z^
} c'6H@m#=