[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; m8A1^ R
} C8zeqS^N
int i1=l; $d[:4h~
int i2=mid+1; lD=j/
for(int cur=l;cur<=r;cur++){ hds4_
if(i1==mid+1) rZ4<*Zegv
data[cur]=temp[i2++]; T1[ZrY'0
else if(i2>r) "<R 2oo)^
data[cur]=temp[i1++]; |VF"Cjw?
else if(temp[i1] data[cur]=temp[i1++]; X,CFY
else LMj'?SuH
data[cur]=temp[i2++]; nECf2>Yp v
} N2Hb19/k
} \`# 0,pLr
HBGA lZ
} Upen/1bA
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改进后的归并排序: LZ:\V)5+
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package org.rut.util.algorithm.support; 7OHw/-j\
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import org.rut.util.algorithm.SortUtil; |H@p^.;
glIIJ5d|,
/** IcA~f@
* @author treeroot eZ$1|Sj]j
* @since 2006-2-2 {-qTU6
* @version 1.0 k= 1+mG
*/ xGk4KcxKs
public class ImprovedMergeSort implements SortUtil.Sort { H43D=N&
,6pH *b$
private static final int THRESHOLD = 10; N'.+ezZ;h
|:BYOxAYZ8
/* j"8N)la
* (non-Javadoc) izo $0
* jo#F&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Uwa1)Lwn
*/ (j"MsCwE
public void sort(int[] data) { 5aQg^f%\
int[] temp=new int[data.length]; k]YGD
mergeSort(data,temp,0,data.length-1); W}3vY]
} feHAZ.8rp+
fdW={}~
private void mergeSort(int[] data, int[] temp, int l, int r) { bd}SB-D
int i, j, k; ?QVI'R:Z?
int mid = (l + r) / 2; -2d&Aq4m)
if (l == r) ;Nij*-U4~
return; I/|n ma/ $
if ((mid - l) >= THRESHOLD) "V2$g
mergeSort(data, temp, l, mid); C>ZeG Vq
else !-~(*tn
insertSort(data, l, mid - l + 1); [GM<Wt0
if ((r - mid) > THRESHOLD) W{aNS@1
mergeSort(data, temp, mid + 1, r); c>.Xc[H
else Lcm!e
insertSort(data, mid + 1, r - mid); BT0hx!Ti
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for (i = l; i <= mid; i++) { 2wvDC@
temp = data; Ba~Iy2\x
} 4VgDN(n0@
for (j = 1; j <= r - mid; j++) { P^-9?uBno
temp[r - j + 1] = data[j + mid]; #IDCCD^1=
} ^123.Ru|t
int a = temp[l]; >^N:A
int b = temp[r]; `;@4f|N9
for (i = l, j = r, k = l; k <= r; k++) { PD4E&k
if (a < b) { JnJz{(c
data[k] = temp[i++]; KYN{iaj
a = temp; DcHMiiVM
} else { _Oq\YQb v
data[k] = temp[j--]; miqCUbcU
b = temp[j]; xM\ApN~W
} K(S/D(\ FL
} n Lb 9$&
} >j3N-;o@?
Bs}>#I
/** Q8i6kf!
* @param data {c;3$
* @param l dW68lVWq_
* @param i ]+P&Y:
*/ W9"I++~f
private void insertSort(int[] data, int start, int len) { *6tN o-)^
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); C"<@EMU9
} SGm?"esEt
} 4uA^/]ygo
} [DwB7l)O(
} g(k|"g`*
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堆排序： FO$Tn+\6
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package org.rut.util.algorithm.support; +_Z/VQv
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import org.rut.util.algorithm.SortUtil; 3FN? CN] O
(P-<9y@
/** K2 2Xo<3
* @author treeroot g_U69 z
* @since 2006-2-2 X Rn=;gK%J
* @version 1.0 6Y^o8R
*/ {J$aA6t:"T
public class HeapSort implements SortUtil.Sort{ $!Tw`O
C+5nft6:
/* (non-Javadoc) 8vK&d>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E12k1gC`
*/ KJ_R@,v\
public void sort(int[] data) { l.$#IE
MaxHeap h=new MaxHeap(); T!bu}KO
h.init(data); se[};t:
for(int i=0;i h.remove(); m@YLZ
System.arraycopy(h.queue,1,data,0,data.length); r;z A `
} ,e2va7}3
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private static class MaxHeap{ #ZA YP
30@ GFaab
void init(int[] data){ ^dqEOW
this.queue=new int[data.length+1]; 7_,gAE:kG
for(int i=0;i queue[++size]=data; .E&~]<
fixUp(size); s25012
} SCij5il%
} VzesqVx
5oS\uX|
private int size=0; o6 /?WR9
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private int[] queue; ]_s]Q_+E
sXu]k#I^"
public int get() { lS^0*(Y
return queue[1]; @zbXG_J
} }8HLyK,4
i7FEjjGtG
public void remove() { :z\STXq
SortUtil.swap(queue,1,size--); \+xsJbEV
fixDown(1); 4"sP= C
} c'b,=SM
file://fixdown ~"k'T9QBY
private void fixDown(int k) { D6w0Y:A{.
int j; 7nmo p7
while ((j = k << 1) <= size) { q)*0G*
if (j < size %26amp;%26amp; queue[j] j++; ArY'NE\Htt
if (queue[k]>queue[j]) file://不用交换 Z>l>@wNm
break; L6^h3*JyD
SortUtil.swap(queue,j,k); s6B@:9
k = j; Ty=}A MMyE
} kbY@Y,:w
} [C$ 0HW
private void fixUp(int k) { F}Au'D&n_
while (k > 1) { @lwqkJ
int j = k >> 1; &+v&Dd&
if (queue[j]>queue[k]) +-hmITJv
break; Fr~xN!
SortUtil.swap(queue,j,k); e\<I:7%Rg
k = j; rfjQx]3pB
} O%r<I*T^r
} >KE(%9y~
7u zN/LAF
} xk/(|f{L
>L%%B-
} DxlX-
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SortUtil： ,O}zgf*H;
+"!IVHY
package org.rut.util.algorithm; [Mi~4b
{T.VB~C
import org.rut.util.algorithm.support.BubbleSort; L-XTIL$$
import org.rut.util.algorithm.support.HeapSort; C.@TX
import org.rut.util.algorithm.support.ImprovedMergeSort; "P6MLf1
import org.rut.util.algorithm.support.ImprovedQuickSort; /=N`P &R#
import org.rut.util.algorithm.support.InsertSort; ,0~=9dR
import org.rut.util.algorithm.support.MergeSort; T4[eBO
import org.rut.util.algorithm.support.QuickSort; 0PN{ +<?.
import org.rut.util.algorithm.support.SelectionSort; 6[cMPp x
import org.rut.util.algorithm.support.ShellSort; &\LbajP:+
tm$3ZzP4
/** .MKxHM7
* @author treeroot 0^+W"O
* @since 2006-2-2 1WU-gQki!
* @version 1.0 y3x_B@}BY
*/ w^~,M3(+)1
public class SortUtil { =6Z1yw7s
public final static int INSERT = 1; [lf[J&}X
public final static int BUBBLE = 2; m\(a{x
public final static int SELECTION = 3; wegBMRQVp
public final static int SHELL = 4; zIu1oF4[
public final static int QUICK = 5; H_{Yr+p
public final static int IMPROVED_QUICK = 6; ,D8Tca\v
public final static int MERGE = 7; BEw(SQH
public final static int IMPROVED_MERGE = 8; /O9z-!Jz
public final static int HEAP = 9; aa|xZ
C-8@elZ1
public static void sort(int[] data) { YJ6Xq||_
sort(data, IMPROVED_QUICK); <*L8kNykK
} E:2Or~
private static String[] name={ NunT1ved
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Af;$}P
}; ="V6z$N
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private static Sort[] impl=new Sort[]{ e.[h
new InsertSort(), "h "vp&A
new BubbleSort(), C`fQ` RL\
new SelectionSort(), }u :sh >2
new ShellSort(), m9r X
new QuickSort(), [|vdr.
new ImprovedQuickSort(), b<%6aRC\
new MergeSort(), #}.db?[Rv
new ImprovedMergeSort(), dP82bk/e
new HeapSort() C[75!F
}; Qk((H~I}
d;`JDT
public static String toString(int algorithm){ dI`b AP;\
return name[algorithm-1]; y@F{pr+dA
} !^y'G0
:>|[ o&L
public static void sort(int[] data, int algorithm) { ).\%a h
impl[algorithm-1].sort(data); `,J\E<4J
} L9T|*?||
u BvN*LQ
public static interface Sort { Kg56.$
public void sort(int[] data); 2vynz,^ET
} 4v;/"4)'
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public static void swap(int[] data, int i, int j) { YQ]W<0(
int temp = data; env]*gx+=
data = data[j]; alyWp
data[j] = temp; (<|,LagTuc
} 3:s!0ty"
} G22u+ua