[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; MSw$_d
} %Ip*Kq-
int i1=l; >6<q8{*
int i2=mid+1; #wY0D_3@1
for(int cur=l;cur<=r;cur++){ );FS7R
if(i1==mid+1) "ZrOrdlg+A
data[cur]=temp[i2++]; r)^vO+3u
else if(i2>r) j8Cho5C
data[cur]=temp[i1++]; ICC%,$C~l
else if(temp[i1] data[cur]=temp[i1++]; hI},~af
else s58C2
data[cur]=temp[i2++]; :e<7d8E5n{
} g%nl!dgS
} [P~hjmJ(y
OsqNB'X
} ]QVNn?PA8
U75Jp%bL
改进后的归并排序: ]bZ(HC?KZr
rHjq1-t
package org.rut.util.algorithm.support; FAsFjRS
rV6/Tdy
import org.rut.util.algorithm.SortUtil; gw36Ec<M
>w+HHs/$wK
/** wE]K~y!`
* @author treeroot q1?&Ev^
* @since 2006-2-2 s{0aBeq
* @version 1.0 8NBT|N~N
*/ X5LBEOG
public class ImprovedMergeSort implements SortUtil.Sort { #|[ M?3
Fqy\CMC
private static final int THRESHOLD = 10; t.p~\6Yi
U;N:j8
/* 8[vc?+>&
* (non-Javadoc) /D!;u]
* M{g%cR0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) */:uV B,b2
*/ `d7n?|pD
public void sort(int[] data) { Zf$Np50@(
int[] temp=new int[data.length]; $5x ,6[&
mergeSort(data,temp,0,data.length-1); eI45PMP
} rf~Y6U?7
a.N{-2ptH
private void mergeSort(int[] data, int[] temp, int l, int r) { &i+Ce
int i, j, k; 7x);x/#8Z
int mid = (l + r) / 2; kF(n!2"W
if (l == r) JjaoOe
return; i4Lc$20?d
if ((mid - l) >= THRESHOLD) ]^'@[<
mergeSort(data, temp, l, mid); [e[<p\]
else ?POUtRN
insertSort(data, l, mid - l + 1); $odso;Hn
if ((r - mid) > THRESHOLD) LUB${0BrA
mergeSort(data, temp, mid + 1, r); Guz"wY
else KlRr8G!Z
insertSort(data, mid + 1, r - mid); 7frTTSZ
L:XC
for (i = l; i <= mid; i++) { X+UJzR90
temp = data; )nL`H^
} svxw^0~a
for (j = 1; j <= r - mid; j++) { 8NyJc"T<.
temp[r - j + 1] = data[j + mid]; [ ol9|sdu
} kuyjnSo9i
int a = temp[l]; jCbV,0)^
int b = temp[r]; _SW3_8SuM.
for (i = l, j = r, k = l; k <= r; k++) { BauU{:Sh
if (a < b) { C8 \5A8c
data[k] = temp[i++]; M5gWD==uP
a = temp; -f*P nxg
} else { sMu] /'7
data[k] = temp[j--]; ]a5 f2lE
b = temp[j]; X}+>!%W!}
} QQWadVQo
} a~'a
} (=7Cs
9$2/MT't
/** 0lhVqy}:}o
* @param data R(q~ -3~
* @param l &=VDASEu
* @param i ^R:cd8+?%
*/ %CK^Si%+
private void insertSort(int[] data, int start, int len) { ^fZ&QK
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (sh)TBb5
} ?@E!u|]K
} }Y;K~J
} gNt(,_]ZR
} ZYC<Wb)I
1t)il^p4[;
堆排序： `@nl
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package org.rut.util.algorithm.support; }GeSu|m(
Y1]n^
import org.rut.util.algorithm.SortUtil; rqY`8Ry2M
=Xo =Qcr
/** :Nz9xD$S5
* @author treeroot J+`VujWT
* @since 2006-2-2 |`.([2
* @version 1.0 B)0i:"q
*/ {{QELfH2
public class HeapSort implements SortUtil.Sort{ O#F4WWF
@3zg=?3
/* (non-Javadoc) !QvZ<5(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) G K7![p
*/ gHo?[pS%y
public void sort(int[] data) { ;qm D50:%
MaxHeap h=new MaxHeap(); Y'8?.a]'
h.init(data); "1%5,
for(int i=0;i h.remove(); EM[WK+9>I{
System.arraycopy(h.queue,1,data,0,data.length); DQr Y*nH
} RJd(~1
3.*8)NW
private static class MaxHeap{ ))"6ern
[n:<8ho
void init(int[] data){ }hhGu\
this.queue=new int[data.length+1]; Y\No4w ^|d
for(int i=0;i queue[++size]=data; , GP?amh
fixUp(size); neLAEHV
} Fvbh\m ~
} Dy:|g1>
FY#C.mL
private int size=0; 5yP\I+Fm
)v.=jup[
private int[] queue; MB]<Dyj,
8|\8O@
public int get() { a6uJYhS~
return queue[1]; [D\k^h
} ]GW]dM
dZ0A3(t
public void remove() { ,^\2P$rT
SortUtil.swap(queue,1,size--); Jcrw#l8|C
fixDown(1); bcE._9@@
} 7t0er'VC
file://fixdown Pu"P9
private void fixDown(int k) { 1pgU}sRk
int j; (&F ,AY3A
while ((j = k << 1) <= size) { ZZzMO6US0
if (j < size %26amp;%26amp; queue[j] j++; pC@{DW;V6R
if (queue[k]>queue[j]) file://不用交换 Qo{/@
break; M 0U0;QJ
SortUtil.swap(queue,j,k); }E50>g
k = j; heV=)8
} ^LoUi1j
} 6\q]rfQ
private void fixUp(int k) { rE.;g^4p
while (k > 1) { ]QlwR'&j/n
int j = k >> 1; huh6t !
if (queue[j]>queue[k]) b?tB(if!I
break; j}.\]$J
SortUtil.swap(queue,j,k); `xqr{lhL
k = j; >JFO@O5
} /}b03
} CTq&-l:f
Nh_Mz;ITuu
} B#Vz#y
r{L> F]Tw
} 4R1<nZ"e~
vunHNHltW0
SortUtil： jtW!"TOY
S.-TOE
package org.rut.util.algorithm; Y[}>CYO
#W4dkCd(pF
import org.rut.util.algorithm.support.BubbleSort; H4&lb}
import org.rut.util.algorithm.support.HeapSort; L.*M&Ry
import org.rut.util.algorithm.support.ImprovedMergeSort; gG(fQ 89U"
import org.rut.util.algorithm.support.ImprovedQuickSort; [\v}Ul
import org.rut.util.algorithm.support.InsertSort; "Q@ronP(~
import org.rut.util.algorithm.support.MergeSort; -g*4(w
import org.rut.util.algorithm.support.QuickSort; 1mOh{:1u
import org.rut.util.algorithm.support.SelectionSort; Y)*#)f
import org.rut.util.algorithm.support.ShellSort; EyJJ0
5B3G @KR
/** \fz<.l]
* @author treeroot A$Hfr8w1u
* @since 2006-2-2 R{<kW9!
* @version 1.0 Q ayPo]O
*/ jaII r06
public class SortUtil { OEA&~4&{7
public final static int INSERT = 1; 'vbsvT
public final static int BUBBLE = 2; }ppN k:B
public final static int SELECTION = 3; <Tzrj1"Q3
public final static int SHELL = 4; D9^h; 8
public final static int QUICK = 5; *x@Onj
public final static int IMPROVED_QUICK = 6; .WA-&b_
public final static int MERGE = 7; CQF:Rnb
public final static int IMPROVED_MERGE = 8; 5Ha9lM2gh
public final static int HEAP = 9; mHdA2
i&bA2p3+d
public static void sort(int[] data) { S&Zm0Ku
sort(data, IMPROVED_QUICK); vlmB`T
} qouhuH_WtJ
private static String[] name={ Z'`<5A%;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0l)~i''
}; n'n/Tu
;K:zmH
private static Sort[] impl=new Sort[]{ bzBEX mC
new InsertSort(), 4&<oFW\r
new BubbleSort(), i[7\[
new SelectionSort(), ^}/PGG\~r
new ShellSort(), le|~BG hL
new QuickSort(), 89pEfl j2
new ImprovedQuickSort(), UZ\u;/}
new MergeSort(), 4":KoS`,j
new ImprovedMergeSort(), _|kxY'_[8
new HeapSort() J=9FRC
}; y-'$(x
4tRYw0f47
public static String toString(int algorithm){ h\fjBDU^
return name[algorithm-1]; ^ Edfv5
} X5zDpi|Dq
I8hz(2jI
public static void sort(int[] data, int algorithm) { Aza /6OL
impl[algorithm-1].sort(data); sBj(Qd
} _hAcJ{Y
8]M;T>n[
public static interface Sort { SYAyk
public void sort(int[] data); Pr':51(
} Q{sH3Y#l
#xsE3Wj-X
public static void swap(int[] data, int i, int j) { wN_Vfb
int temp = data; MU@UfB|;u
data = data[j]; 44ek IV+?
data[j] = temp; W9 GxXPA
} !Q2d(H>
} >?2M }TV3