[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; Q7CsJzk~)
} Q"#J6@
int i1=l; }jPSUdo
int i2=mid+1; X:{!n({r=
for(int cur=l;cur<=r;cur++){ @H8EWTZ
if(i1==mid+1) -KbYOb
data[cur]=temp[i2++]; !&E-}}<
else if(i2>r) vl)l'
data[cur]=temp[i1++]; jPkn[W# 6
else if(temp[i1] data[cur]=temp[i1++]; 8z\xrY
else j?QDR
data[cur]=temp[i2++]; J'r^/
} GQ ;;bcj&
} B9S@(/"7
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} A=0'Ks
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改进后的归并排序: (QB2T2x
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package org.rut.util.algorithm.support; )+Pus~w
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import org.rut.util.algorithm.SortUtil; $ocdI5
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/** >yDZw!C
* @author treeroot />>\IR
* @since 2006-2-2 _)-o1`*-
* @version 1.0 mX|ojZ
*/ 7{Wny&[0
public class ImprovedMergeSort implements SortUtil.Sort { dAj$1Ke
Znv,9-
private static final int THRESHOLD = 10; %&bY]w
gBD]}vo-
/* *X}`PF
* (non-Javadoc) sDV Q#}a
* Cgc\ ah
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =2x^nW
*/ 7 X4LJf
public void sort(int[] data) { 2:ylv<\$
int[] temp=new int[data.length]; \73ch
mergeSort(data,temp,0,data.length-1); Ek}A]zC
} 9N3eN
kcxAd
private void mergeSort(int[] data, int[] temp, int l, int r) { x,Vr=FB
int i, j, k; ovV'VcUs
int mid = (l + r) / 2; RG`1en
if (l == r) i!Ga5v8n:
return; <a+Z;>
if ((mid - l) >= THRESHOLD) |Q>IrT
mergeSort(data, temp, l, mid); Z?z.?ar
else ? =+WRjF
insertSort(data, l, mid - l + 1); 9cm#56
if ((r - mid) > THRESHOLD) 4KrL{Z+}
mergeSort(data, temp, mid + 1, r); #$y?v%^
else ?bu>r=oIO]
insertSort(data, mid + 1, r - mid); nQS|Lt_+
L/^I*p,
for (i = l; i <= mid; i++) { HpnWoDM
temp = data; 8~gLqh8^V
} "zy7C*)>r
for (j = 1; j <= r - mid; j++) { PUX;I0Cf
temp[r - j + 1] = data[j + mid]; v.5+7,4
} YK~%xo
int a = temp[l]; 1-QS~)+
int b = temp[r]; EJ@ ~/)<
for (i = l, j = r, k = l; k <= r; k++) { CJI~_3+K
if (a < b) { W@!S%Y9
data[k] = temp[i++]; ,7b[!#?8
a = temp; Q NVa?'0"Y
} else { F4{IEZ
data[k] = temp[j--]; >&k-'`Nw
b = temp[j]; {]|J5Dgfe
} mj@13$=
} 5/z/>D;
} X[TR3[1}
`y* }lg T
/** t&DEb_"De
* @param data Ti&z1_u
* @param l 8HdAFRw
* @param i -|\ZrE_h
*/ ^sg,\zD 'X
private void insertSort(int[] data, int start, int len) { sn>~O4"
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Ecx<OTo
} WMP,\=6k0
} b<u3 hln%,
} HUOj0T
} xn|(9#1o
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堆排序： N)>ID(}F1
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package org.rut.util.algorithm.support; GowH]MO
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import org.rut.util.algorithm.SortUtil; >&#)Tqt!?
H 7 ^/q7
/** ~<x:q6
* @author treeroot y18Y:)DkL
* @since 2006-2-2 6\S~P/PkE
* @version 1.0 9]@!S|1
*/ NW)1#]gg%
public class HeapSort implements SortUtil.Sort{ uUw5l})%Fi
& "B=/-(
/* (non-Javadoc) Nl1Do:PY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f:P}*^ Gw
*/ .XhrCiZ
public void sort(int[] data) { %;"y+YFdv
MaxHeap h=new MaxHeap(); FNId;
h.init(data); ]jRfH(i
for(int i=0;i h.remove(); o,3a4nH;
System.arraycopy(h.queue,1,data,0,data.length); 8sK9G` k
} uA#;G/$
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private static class MaxHeap{ ymcLFRu,
i(+p0:< 0
void init(int[] data){ y L~W.H
this.queue=new int[data.length+1]; d8x;~RA
for(int i=0;i queue[++size]=data; ?@ $r
fixUp(size); `pZm?}K
} fLAw12;^
} HiJE}V;Vq
$7A8/#
private int size=0; 7i1q wRv
J!7MZLb
private int[] queue; |IUWF%~^$+
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public int get() { "8zDbdK
return queue[1]; ^L&iR0
} , SnSW-P
G;XxBA
public void remove() { _2 osV[e
SortUtil.swap(queue,1,size--); N=g"(%
fixDown(1); SOvF[,+
} `n?DU;,
file://fixdown R .2wqkY
private void fixDown(int k) { Ef13Q]9|
int j; 0Z]!/AsC
while ((j = k << 1) <= size) { YkQd
if (j < size %26amp;%26amp; queue[j] j++; eO[b1]WLP
if (queue[k]>queue[j]) file://不用交换 (0kK_k'T
break; @2v_pJy^
SortUtil.swap(queue,j,k); =rX>1
k = j; IRqy%@)
} 9490o:s
} iM3V=&)
private void fixUp(int k) { i8HTzv"J
while (k > 1) { {U !g.rh
int j = k >> 1; 1D!<'`)AY
if (queue[j]>queue[k]) #@nezu2
break; LC!bIm5'
SortUtil.swap(queue,j,k); }|5Pr(I
k = j; ~2khgZ
} ^@NU}S):yN
} k2UVm$}u
4x[S\,20
} G9<X_
/fV;^=:8c
} ?#UO./"
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SortUtil： )p%E%6p
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package org.rut.util.algorithm; S#} KIy
)q3p-)@kQ
import org.rut.util.algorithm.support.BubbleSort; YLn?.sV{[0
import org.rut.util.algorithm.support.HeapSort; Z0r?|G0
import org.rut.util.algorithm.support.ImprovedMergeSort; i&GH/y
import org.rut.util.algorithm.support.ImprovedQuickSort; Xh;#
import org.rut.util.algorithm.support.InsertSort; %sQ^.` 2
import org.rut.util.algorithm.support.MergeSort; e6RPIg
import org.rut.util.algorithm.support.QuickSort; C8i^P}y
import org.rut.util.algorithm.support.SelectionSort; G+\GaY[
import org.rut.util.algorithm.support.ShellSort; 0'?L#K
UN<]N76!
/** Gjo`&#
* @author treeroot u!qP
* @since 2006-2-2 lQkQ9##*
* @version 1.0 2x0<&Xy#P
*/ hODWB&b
public class SortUtil { 'Ne@e)s9
public final static int INSERT = 1; 1c{DY
public final static int BUBBLE = 2; WU=59gB+jL
public final static int SELECTION = 3; mvT(.R ..s
public final static int SHELL = 4; 001FmiV
public final static int QUICK = 5; l8#EM1g-
public final static int IMPROVED_QUICK = 6; ]f9Cx\d:k
public final static int MERGE = 7; `$aZ0+
public final static int IMPROVED_MERGE = 8; WbqWG^W
public final static int HEAP = 9; Czu\RXJR
8StgsM
public static void sort(int[] data) { O#S.n#{
sort(data, IMPROVED_QUICK); P1' al
} Otm0(+YB7
private static String[] name={ -Wi` G
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" p|D/;Mk
}; 9|CN8x-
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private static Sort[] impl=new Sort[]{ l3F6AlPql
new InsertSort(), Jz *;q~
new BubbleSort(), \7'{g@C(
new SelectionSort(), $43qME
new ShellSort(), &m:uO^-D
new QuickSort(), /{--+ C
new ImprovedQuickSort(), =^50FI|
new MergeSort(), **G9H
new ImprovedMergeSort(), {8,J@9NU
new HeapSort() hv_XP,1K
}; aM0f/"-_
+@iA;2&
public static String toString(int algorithm){ ]^K4i)\
return name[algorithm-1]; >%8KK|V{
} )+t0:GwP`:
=]Jd9]vi
public static void sort(int[] data, int algorithm) { _Qi&J.U>
impl[algorithm-1].sort(data); *>qp:;,DKP
} H@8sNV/u
gn".u!9j
public static interface Sort { L"Olwwmk
public void sort(int[] data); 8k1Dj1@0z
} mk+B9?;cF-
Jidwt$1l(
public static void swap(int[] data, int i, int j) { a8Nh=^Py
int temp = data; mmRJ9OhS
data = data[j]; Ob&<]
data[j] = temp; uw+M
} Qe0lBR?H
} d-r@E3