[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; >@StKj
} X]v.Yk=wu
int i1=l; k?ksv+e\
int i2=mid+1; KHt.g`1:R
for(int cur=l;cur<=r;cur++){ `+EjmY
if(i1==mid+1) pYaq1_<+
data[cur]=temp[i2++]; YJ~3eZQ
else if(i2>r) qJLtqv
data[cur]=temp[i1++]; pax;#*QcQ
else if(temp[i1] data[cur]=temp[i1++]; qY%{c-aMA
else TkV*^j5
data[cur]=temp[i2++]; e"6!0Py#*
} \&5t@sC
} CDgu`jj%]
%yP*Vp,W
} ^FN(wvqb8
ypsT:uLT
改进后的归并排序: #ZPy&GIr
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package org.rut.util.algorithm.support; \k)(:[^FY
|csR"DOqz
import org.rut.util.algorithm.SortUtil; mdPEF)-
PV/SzfvIq
/** Mwd(?o
* @author treeroot o;2QZ"v
* @since 2006-2-2 M}BqSzd*
* @version 1.0 \hFIg3
*/ >$p|W~x
public class ImprovedMergeSort implements SortUtil.Sort { cQldBc
l]v>PIh~N
private static final int THRESHOLD = 10; Rjz~n38.
:Vx5%4J
/* -A17tC20J1
* (non-Javadoc) \t 04-
* H}B%OFI\+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [_?dpaTt
*/ q/HwcX+[b
public void sort(int[] data) { mo- Y %
int[] temp=new int[data.length]; iLD:}yK
mergeSort(data,temp,0,data.length-1); &ZUV=q%g9n
} T?'Vb
sZ9VXnz24
private void mergeSort(int[] data, int[] temp, int l, int r) { 6_h'0~3?`
int i, j, k; O6$d@r;EK]
int mid = (l + r) / 2; NM_Xy<.~E
if (l == r) 9WhZ= Xk
return; v\:P_J
if ((mid - l) >= THRESHOLD) { |[n>k
mergeSort(data, temp, l, mid); aZ{]t:]
else #0;ULZ99aH
insertSort(data, l, mid - l + 1); yxz"9PE/P
if ((r - mid) > THRESHOLD) f]Q`8nU
mergeSort(data, temp, mid + 1, r); PhOtSml0
else y,QJy=?
insertSort(data, mid + 1, r - mid); :gJ?3LwTf
I@<\DltPi
for (i = l; i <= mid; i++) { Z&E!m
temp = data; .#[==
} uWE :3
for (j = 1; j <= r - mid; j++) { \tx4bV#
temp[r - j + 1] = data[j + mid]; 3/q)%Z^=
} ).b,KSi
int a = temp[l]; #N'W+M /
int b = temp[r]; 1fzHmD
for (i = l, j = r, k = l; k <= r; k++) { l4+Bs!i`
if (a < b) { mE}@}@(
data[k] = temp[i++]; qoXncdDHZ
a = temp; HM(S}>
} else { Gn8'h TM
data[k] = temp[j--]; 1||\3L/
b = temp[j]; #[C=LGi
} _pS|bqF
} W dNOE;R
} oX #WT
w( ^
/** efu'PfZ`&
* @param data nW*D
* @param l E'O[E=
* @param i zZax![Z
*/ t+?m<h6w;l
private void insertSort(int[] data, int start, int len) { 7A mnxFC
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); F$k^px
} ?'$Yj>R6
} @ysc?4% q
} LnZC)cL P/
} BQ7p<{G
H]x-s
堆排序： /$ :w8
= olmBXn/
package org.rut.util.algorithm.support; yxx'g+D*
GF=rGn@,)`
import org.rut.util.algorithm.SortUtil; B3V;
HDY2<Hzc
/** EDf"1b{PX
* @author treeroot 0;V "64U
* @since 2006-2-2 / !@@
* @version 1.0 Adma~]T9
*/ L" GQQ
public class HeapSort implements SortUtil.Sort{ =W_Pph
k:qS'
/* (non-Javadoc) G (o9*m1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /eO:1c
*/ r$ 8^K\oF
public void sort(int[] data) { 4fyds< f
MaxHeap h=new MaxHeap(); 8*iIJ
h.init(data); UTLuzm
for(int i=0;i h.remove(); 5u89?-UD
System.arraycopy(h.queue,1,data,0,data.length); P`xQL
} !|#W,9
?~p]Ey}~9
private static class MaxHeap{ w4fz!l]
P<5v\\
void init(int[] data){ `UK'IN.il
this.queue=new int[data.length+1]; ]9P2v X
for(int i=0;i queue[++size]=data; #@3&1}J/
fixUp(size); n,_q6/!
} <Cbi5DtR
} NrK.DY4
&{uj3s&C
private int size=0; nign"r
45aUz@
private int[] queue; \QvoL
wJ%;\06
public int get() { {)?:d6"
return queue[1]; CVt:tV
} nLD1j
z*FCd6X
public void remove() { A 6IrA/b
SortUtil.swap(queue,1,size--); bQlvb
fixDown(1); g]Jt (aYK
} w5+H9R6
file://fixdown BtA_1RO
private void fixDown(int k) { Rl/5eE8
int j; 5w+KIHhN|
while ((j = k << 1) <= size) { J6[V7R[\
if (j < size %26amp;%26amp; queue[j] j++; ouE/\4'NB
if (queue[k]>queue[j]) file://不用交换 QB.QG!@
break; K!,T.qA&=
SortUtil.swap(queue,j,k); d2a*xDkv
k = j; YLsOA`5X
} 2if7|o$=
} MfA@)v
private void fixUp(int k) { h4#y'E!,Z
while (k > 1) { F(?O7z"d
int j = k >> 1; -Lhq.Q*a
if (queue[j]>queue[k]) B{ Ab#
break; :*} -,{uX
SortUtil.swap(queue,j,k); 5(=5GkE)>
k = j; 9,wD
} 4^Y{ BS fF
} 7M/v[dwL
ZQk!Ia7
} M '#a.z%
@=sM')f&
} 2<FEn$n[
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SortUtil： "P9(k>
PS}'LhZ
package org.rut.util.algorithm; FMi:2.E
HSk_'g(\0
import org.rut.util.algorithm.support.BubbleSort; gHo sPY[
import org.rut.util.algorithm.support.HeapSort; ;aN_!! r
import org.rut.util.algorithm.support.ImprovedMergeSort; 5MCnGg@
import org.rut.util.algorithm.support.ImprovedQuickSort; QdrZi.qKH
import org.rut.util.algorithm.support.InsertSort; smUSR4VK
import org.rut.util.algorithm.support.MergeSort; /rIyW?& f
import org.rut.util.algorithm.support.QuickSort; lQM&q
import org.rut.util.algorithm.support.SelectionSort; sg8[TFX@Z
import org.rut.util.algorithm.support.ShellSort; hm*cGYV/
*\(MG|S
/** rez)$
* @author treeroot V1&qgAy~
* @since 2006-2-2 L</k+a?H!
* @version 1.0 RY .@_{
*/ .He}f,!f<
public class SortUtil { ^6On^k[|fw
public final static int INSERT = 1; l0 8vF$k|d
public final static int BUBBLE = 2; 02_+{vk!
public final static int SELECTION = 3; bu9.HvT'
public final static int SHELL = 4; 3_ly"\I\
public final static int QUICK = 5; "ze-Mb
public final static int IMPROVED_QUICK = 6; } J[Z)u
public final static int MERGE = 7; 4_`(c1oA
public final static int IMPROVED_MERGE = 8; 1Q/=s,{u
public final static int HEAP = 9; Kh$Q9$
6CCm1F{`
public static void sort(int[] data) { AP1&TQ,&
sort(data, IMPROVED_QUICK); rQxiG[0
} H76iBJ66
private static String[] name={ s IFE:/1,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" g<N;31:c\
}; ^)(-7H
B<Q)z5KK
private static Sort[] impl=new Sort[]{ 0NeIQr1N_
new InsertSort(), *`q?`#1&&.
new BubbleSort(), ", p5}}/
new SelectionSort(), %tMx48'N
new ShellSort(), lSg[7lt
new QuickSort(), W,|+Dl
new ImprovedQuickSort(), FUarI5#fwF
new MergeSort(), h 8xcq#
new ImprovedMergeSort(), {h=gnR-9
new HeapSort() 84WX I#BH
}; >J5C.hx
T]JmnCX>:
public static String toString(int algorithm){ \h"U+Bv7
return name[algorithm-1]; QC?~$>h!?
} w_f.\\1r
]rv4O@||w
public static void sort(int[] data, int algorithm) { %vv`Vx2
impl[algorithm-1].sort(data); r'`7}@H*
} MkL)
ZfH+Iqd
public static interface Sort { ua)jGif
public void sort(int[] data); m"T}em#
} !E_Zh*lgm
u0GHcpOm
public static void swap(int[] data, int i, int j) { `BQv;NtP
int temp = data; Z\$M)e8n
data = data[j]; -V4%f{9T3
data[j] = temp; "M, 1ElQ
} $~S~pvT
} ~nTj't2R