[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; G\Me%{b#
} }/VHeHd
int i1=l; #lO;G k{
int i2=mid+1; bA)Xjq)Rr
for(int cur=l;cur<=r;cur++){ luMNi^FQ
if(i1==mid+1) C\{4<:<_&
data[cur]=temp[i2++]; Ssj'1[%
else if(i2>r) sCUPa-cHF
data[cur]=temp[i1++]; XP7A.I#q0
else if(temp[i1] data[cur]=temp[i1++]; F,sT[C
else S;])Nt'X'
data[cur]=temp[i2++]; t]x HM
} G 1$l%B
} R/#*~tPi8
L8W3Tpi&(
} W{0:8_EI
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改进后的归并排序: r (uM$R$o
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package org.rut.util.algorithm.support; 5?b9[o+D
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import org.rut.util.algorithm.SortUtil; h+Dok#g
;[xDc>&("Q
/** |3i~?] A
* @author treeroot mK4a5H
* @since 2006-2-2 $OT:J
* @version 1.0 3!,%;Vz=
*/ vmoqsdZ/
public class ImprovedMergeSort implements SortUtil.Sort { "K8qmggTq
yaf2+zV*
private static final int THRESHOLD = 10; =y':VIVJC
w Bl=]BW!%
/* rN}^^9
* (non-Javadoc) `<K#bDU;a
* 5`+*({
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |!}$V
*/ 1t)6wk N
public void sort(int[] data) { '.iUv#j4Sh
int[] temp=new int[data.length]; WMg#pLc#
mergeSort(data,temp,0,data.length-1); :70oO}0m.
} Xbz}pAnj
8\yH7H
private void mergeSort(int[] data, int[] temp, int l, int r) { EGs z{c[8@
int i, j, k; q%JV"9,
int mid = (l + r) / 2; I[&!\Me[+w
if (l == r) g~cWBr%>
return; P`"dj@1'
if ((mid - l) >= THRESHOLD) 5'o.v^l
mergeSort(data, temp, l, mid); "u%$`*
else )QX9T
insertSort(data, l, mid - l + 1); # mzJ^V-
if ((r - mid) > THRESHOLD) -du+iOe?
mergeSort(data, temp, mid + 1, r); 6sPd")%G
else 9oaq%Sf
insertSort(data, mid + 1, r - mid); .z_^_@qdm
kh`X92~
for (i = l; i <= mid; i++) { rz3&khi
temp = data; vv3dr_l:
} ue`F|
for (j = 1; j <= r - mid; j++) { !0w'S>e
temp[r - j + 1] = data[j + mid]; K,So#Ui
} _ p?q/-[4
int a = temp[l]; rp _G.C
int b = temp[r]; o77HRX
for (i = l, j = r, k = l; k <= r; k++) { ~:JKXa?
if (a < b) { g'mkhF(
data[k] = temp[i++]; HVC\(h,)i
a = temp; n%ld*EgY
} else { z\;kjI
data[k] = temp[j--]; YN\ QwV
b = temp[j]; QJ$]~)w?H
} |o+vpy
} 7}nOF{RH]
} cW MZw|t
oiklRf
/** Vv zd>yII
* @param data (=p}b:Z
* @param l YpuA,r;"
* @param i F9d][ P@@
*/ ; I=z
private void insertSort(int[] data, int start, int len) { S;CT:kG6Y{
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); S46[2-v1
} ;E*ozKpm
} hR. EZ|.
} \ 0:ITz
} RzyEA3L'
RI%*5lM8;
堆排序： }}ogdq
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package org.rut.util.algorithm.support; |px4a"
y_J{+
import org.rut.util.algorithm.SortUtil; 2Y$==j
\Z)'':},C
/** gs9f2t
* @author treeroot 2wu 5`Z[E
* @since 2006-2-2 X5)>yM^N`
* @version 1.0 <KJ18/
*/ CMTy(Z8_)
public class HeapSort implements SortUtil.Sort{ J\2F%kBej?
Z5NuLB'
/* (non-Javadoc) dLjT^ 9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %3FI>\3
*/ R4{}ZT
public void sort(int[] data) { /oWB7l&
MaxHeap h=new MaxHeap(); _&yQW&vH#
h.init(data); 1f~_# EIC
for(int i=0;i h.remove(); ^GL0|G=(1
System.arraycopy(h.queue,1,data,0,data.length); uE/qraA
} b>fDb J0
wus]
private static class MaxHeap{ #He:p$43
Ot v{#bB$
void init(int[] data){ lJq %me;4m
this.queue=new int[data.length+1]; LZ^sc
for(int i=0;i queue[++size]=data; |/rBR!kPq
fixUp(size); @ '<lD*W
} r}XD{F}"
} q!NwfXJM
{_Wtk@
private int size=0; >R.~'A/$F
Z73 ysn}
private int[] queue; 1q/z&@+B
UIzk-.<
public int get() { 3):7mE(
return queue[1]; `(16_a
} _Z9I')
4?8GK
public void remove() { 60QElJ9D
SortUtil.swap(queue,1,size--); M*@MkN*u&
fixDown(1); sd>#Hn
} ,P5HR+h
file://fixdown Jb_/c``
private void fixDown(int k) { JCE364$$"
int j; s2&UeYbIs
while ((j = k << 1) <= size) { [<OMv9(l'o
if (j < size %26amp;%26amp; queue[j] j++; hZ$* sf
if (queue[k]>queue[j]) file://不用交换 n j1 cqh
break; 4|x5-m+T
SortUtil.swap(queue,j,k); 92eS*x2@
k = j; u;y1leG
} OB5{EILej
} T,jxIFrF
private void fixUp(int k) { $g5pKk
while (k > 1) { "PnYa)?1
int j = k >> 1; +Hv%m8'0|
if (queue[j]>queue[k]) +X.iJ$)
break; .viA+V
SortUtil.swap(queue,j,k); '(I"54W
k = j; h&[!CtPm
} >}_c<`:
} #& Rx(
@$Z5Ag!
} ^8E/I]-
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} ^> ZQ:xs@(
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SortUtil： nhQ.U>&-M
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package org.rut.util.algorithm; nn5S7!
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import org.rut.util.algorithm.support.BubbleSort; 'U5 E{
import org.rut.util.algorithm.support.HeapSort; W:hR81ci
import org.rut.util.algorithm.support.ImprovedMergeSort; ?=f\oH$
import org.rut.util.algorithm.support.ImprovedQuickSort; 5+giT5K*h
import org.rut.util.algorithm.support.InsertSort; NAHQ:$
import org.rut.util.algorithm.support.MergeSort; CSwNsFDR%
import org.rut.util.algorithm.support.QuickSort; AaKILIIQZ
import org.rut.util.algorithm.support.SelectionSort; u.$.RkNMQ
import org.rut.util.algorithm.support.ShellSort; Za4 YD
A~O 'l&KB
/** cb|`)"<HN
* @author treeroot Cg8{NNeD
* @since 2006-2-2 7A7K:,c
* @version 1.0 X!nI{PE
*/ 4hZ-^AL"(
public class SortUtil { *s;$`8fM<
public final static int INSERT = 1; st'Y j
public final static int BUBBLE = 2; z[] AH#h
public final static int SELECTION = 3; !Wn'Ae9
public final static int SHELL = 4; (f $Y0;v>}
public final static int QUICK = 5; 32YE%
public final static int IMPROVED_QUICK = 6; ojtcKw
public final static int MERGE = 7; 7s>d/F3*
public final static int IMPROVED_MERGE = 8; 5orA#B
public final static int HEAP = 9; 0z.`
tH17Z
public static void sort(int[] data) { $N:m 9R
sort(data, IMPROVED_QUICK); {hZZU8*
} wz>j>e6k`
private static String[] name={ U>ob)-tl
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" jk) V[7P
}; &'T7 ~M:
HPtaW:J
private static Sort[] impl=new Sort[]{ kf&id/|
new InsertSort(), )x?F1/
new BubbleSort(), Vu;tU.
new SelectionSort(), 2R:['QT
new ShellSort(), ;y4 "wBX
new QuickSort(), [4PG_k[uTJ
new ImprovedQuickSort(), P0}uTee
new MergeSort(), TX*s T
new ImprovedMergeSort(), PyzWpf
new HeapSort() vHJ~~if
}; S WYiI
k NK)mE
public static String toString(int algorithm){ Tet,mzVuu
return name[algorithm-1]; &[23DrI8
} CQ#p2
kmo3<'j{
public static void sort(int[] data, int algorithm) { Gq+!%'][P
impl[algorithm-1].sort(data); xxiEL2"`>
} [$-y8`~(
Wa,[#H
public static interface Sort { GJ{]}fl
public void sort(int[] data); V&)-u(s_S/
} +4B>gS[ F
83)2c a
public static void swap(int[] data, int i, int j) { wQ4/eQ*
int temp = data; L!-T`R8'c
data = data[j]; m:X;dcq'3
data[j] = temp; /38^N|/Zr
} E]_sl/`{od
} YadyRUE