[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; 92y<E<n
} a%R'x]
int i1=l; M6yzqAh
int i2=mid+1; [QC<u1/"K
for(int cur=l;cur<=r;cur++){ Z4+S4cqnh
if(i1==mid+1) ce3w0UeV
data[cur]=temp[i2++]; cWG>w6FI
else if(i2>r) /F#_~9JXG
data[cur]=temp[i1++]; h>jLhj<07W
else if(temp[i1] data[cur]=temp[i1++]; wNzALfS
else (sX=#<B%
data[cur]=temp[i2++]; & w%%{lM
} rl#[HbPM
} 3=r#=u5z
4dv5
} k 4|*t}o7
G's >0
改进后的归并排序: SRL`!
<zmtVE*>g
package org.rut.util.algorithm.support; 0#K?SuY.eN
Wz}DC7
import org.rut.util.algorithm.SortUtil; Dw\)!,,i7U
8=XfwwWHy<
/** +n#kpi'T
* @author treeroot WJCh{Xn%*
* @since 2006-2-2 BK,h$z7#6
* @version 1.0 T)QZ9a
*/ gDY+'6m;
public class ImprovedMergeSort implements SortUtil.Sort { p72:oX\QI
/`d|W$vN
private static final int THRESHOLD = 10; 1Q$ePo
TQ-V61<5
/* \?n4d#=$o
* (non-Javadoc) -Fi{[%&u
* _FV<[x,nE8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )`Zj:^bz9
*/ Jxyeh1zqB
public void sort(int[] data) { vkFfHzR$
int[] temp=new int[data.length]; Ww(($e!
mergeSort(data,temp,0,data.length-1); <>!Y[Xr^
} 8&q|*/2
ZHA6BVVT
private void mergeSort(int[] data, int[] temp, int l, int r) { .QwwGm
int i, j, k; "rnZ<A}
int mid = (l + r) / 2; y,I?3p|S
if (l == r) D%PrwfR
return; r&^LSTU0!
if ((mid - l) >= THRESHOLD) %O9kq
mergeSort(data, temp, l, mid); +o{]0~y
else -N'xQ(#n3q
insertSort(data, l, mid - l + 1); bf~gWzA
if ((r - mid) > THRESHOLD) m(~5X0
mergeSort(data, temp, mid + 1, r); \W"N{N
else qs$%/
insertSort(data, mid + 1, r - mid); < 0S+[7S"
jt({@;sU[<
for (i = l; i <= mid; i++) { Z0fl]3p
temp = data; K|"97{*|2
} UG)XA-ez
for (j = 1; j <= r - mid; j++) { a[Q\8<
temp[r - j + 1] = data[j + mid]; @I\&-Z ^
} gEWKM(5B}
int a = temp[l]; %by8i1HR
int b = temp[r]; %}t<,ex(yO
for (i = l, j = r, k = l; k <= r; k++) { P=Au~2X
if (a < b) { N$Pi4
data[k] = temp[i++]; ?kOtK
a = temp; B.zRDB}i=
} else { >Ln/)j
data[k] = temp[j--]; ?]JTrv"zp
b = temp[j]; yJ(BPSt
} >U.)?>G/dt
} E=Z;T
} P!;%DI!<b
SV-M8Im73z
/** ROWb:tX}
* @param data _RzwE$+9
* @param l 1M%'Xe7
* @param i zn5U(>=c
*/ P[;<,U;'HO
private void insertSort(int[] data, int start, int len) { ^|h5*Tb
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); F*&A=@/3
} UIhU[f]
} N>Dr z
} 6EHYIN^D
} <"Ox)XG3]W
p i;,?p-
堆排序： Idq&0<I
BhO*Pfs
package org.rut.util.algorithm.support; 3<5E254N
P>*B{fi^
import org.rut.util.algorithm.SortUtil; *aE/\b
#>I*c_-
/** ~Ibq,9i
* @author treeroot vDGAC'
* @since 2006-2-2 <W,M?r+
* @version 1.0 3~Qvp )~
*/ hJuR,NP
public class HeapSort implements SortUtil.Sort{ \KBE+yj
~/R,oQ1!g}
/* (non-Javadoc) O'<5PwhG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {km~,]N
*/ ^/K]id7 2
public void sort(int[] data) { p2v+sWO
MaxHeap h=new MaxHeap(); c ilo8x`
h.init(data); ){XaO;k<]
for(int i=0;i h.remove(); xJ/<G$LNJ0
System.arraycopy(h.queue,1,data,0,data.length); 6P0\t\D0
} \0K3TMl)J
S4r-s;U-v/
private static class MaxHeap{ +<\)b(
`v]|x,l+C
void init(int[] data){ }8H_^G8
this.queue=new int[data.length+1]; /dT7:x*
for(int i=0;i queue[++size]=data; n^HKf^]
fixUp(size); |4=Du-e
} \O*8%
} XI4le=^EM
*]L(,_:"
private int size=0; )#^5$5
!=C74$TH
private int[] queue; 3#=%2\
wt8?@lJ"/
public int get() { f!3$xu5
return queue[1]; ]Wc:9Zb
} 1@xmzTC
-tQi~Y[]
public void remove() { sZ-A~X@g
SortUtil.swap(queue,1,size--); {P/5cw
fixDown(1); /QA:`_</oh
} aan)yP
file://fixdown QYm]&;EI
private void fixDown(int k) { /-in:gX8
int j; mz|#K7:
while ((j = k << 1) <= size) { M_<? <>|
if (j < size %26amp;%26amp; queue[j] j++; T#HW{3
if (queue[k]>queue[j]) file://不用交换 E%A] 8y7
break; {S+ $C
SortUtil.swap(queue,j,k); hkifd4#
k = j; +prr~vgE
} 3RwDIk?>%
} rA=iBb3`
private void fixUp(int k) { nUp, %z[
while (k > 1) { ~\UH`_83[
int j = k >> 1; 1 P0)La#
if (queue[j]>queue[k]) E< 57d,3l
break; P(n_eIF-f
SortUtil.swap(queue,j,k); OMl<=;^:|
k = j; yvQRr75
} NCid`a$
} il=:T\'U9
E46+B2_~zk
} JO|%Vpco
m%=] j<A
} vpnOc2 -
+>w %j&B
SortUtil： p!b_tyJ
a9+l:c@
package org.rut.util.algorithm; <Mt>v2a3Y
%%7~<=rk
import org.rut.util.algorithm.support.BubbleSort; 2YS1%<-g*
import org.rut.util.algorithm.support.HeapSort; T>$S&U
import org.rut.util.algorithm.support.ImprovedMergeSort; ^ UB*Q
import org.rut.util.algorithm.support.ImprovedQuickSort; ZxDh94w/
import org.rut.util.algorithm.support.InsertSort; B7y^)/
import org.rut.util.algorithm.support.MergeSort; oqXs2F
import org.rut.util.algorithm.support.QuickSort; <WWn1k_
import org.rut.util.algorithm.support.SelectionSort; X:0-FCT;\
import org.rut.util.algorithm.support.ShellSort; +!@@55I-
GLS`1!
/** >[$j(k^
* @author treeroot HVG:q#=C
* @since 2006-2-2 E8`AU<
* @version 1.0 Cyn_UE
*/ @4ccZ&`
public class SortUtil { _?aI/D
public final static int INSERT = 1; u{Rgk:bn
public final static int BUBBLE = 2; AA&5wDMV>
public final static int SELECTION = 3; i_[nW
public final static int SHELL = 4; $,s"c(pv[,
public final static int QUICK = 5; [v,Y-}wQ)
public final static int IMPROVED_QUICK = 6; 5s /fBS
public final static int MERGE = 7; #9's^}i
public final static int IMPROVED_MERGE = 8; D^!x@I~:
public final static int HEAP = 9; OG!+p}yD]
zfm-vU
public static void sort(int[] data) { t,v=~LE
sort(data, IMPROVED_QUICK); [k<w'n*
} o 9?#;B$
private static String[] name={ R9-Ps qmF
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]:K[{3iM
}; v 7g?
pS) &d4i
private static Sort[] impl=new Sort[]{ ]b&"](A
new InsertSort(), vz87]InI
new BubbleSort(), zCuN8
new SelectionSort(), fG`<L;wi
new ShellSort(), /XeCJxo8
new QuickSort(), ws_/F
new ImprovedQuickSort(), O{Y_j&1
new MergeSort(), x&['g*[L0
new ImprovedMergeSort(), 01brl^5K
new HeapSort() B]_NI=d
}; Gc1!')g!
MODi:jsl
public static String toString(int algorithm){ ;_TPJy
return name[algorithm-1]; vIK+18v7
} 7)FI_uW
Y/Dah*
public static void sort(int[] data, int algorithm) { Ln3<r&&Jz
impl[algorithm-1].sort(data); |B` mWZ'"
} :wRaB7
YU(|i}b
public static interface Sort { V\=QAN^
public void sort(int[] data); HUuZ7jJwf
} 3<:m;F*#
/W @k:
public static void swap(int[] data, int i, int j) { o4l=oY:'
int temp = data; |PY*"Ul
data = data[j]; V']{n7a-
data[j] = temp; J Gpy$T{t
} Eg/=VBtc
} 9Z_!}eY2mc