[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; `V(zz
} 3,Dc}$t
int i1=l; a{oG[e
int i2=mid+1; ,};UD W
for(int cur=l;cur<=r;cur++){ Xup"gYTZQ
if(i1==mid+1) L?WF[nFR
data[cur]=temp[i2++]; ^xBF$ua37)
else if(i2>r) j,HUk,e^&
data[cur]=temp[i1++]; C`p)S`d
else if(temp[i1] data[cur]=temp[i1++]; F4Jc7k2
else nUgZ]ag=G
data[cur]=temp[i2++]; 'G6M:IXno
} Rh=,]Y
} .Mn+Bd4f
`|{6U"n
} s>pOfXIx
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改进后的归并排序: PT`];C(he
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package org.rut.util.algorithm.support; H(MCY3t
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import org.rut.util.algorithm.SortUtil; hI&ugdf
lphELPh
/** 6m=FWw3y
* @author treeroot 5tSR2gG#K,
* @since 2006-2-2 7tEK&+H`
* @version 1.0 y<53xZi
*/ 3!+N}[$iy
public class ImprovedMergeSort implements SortUtil.Sort { T)!$-qdz/
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private static final int THRESHOLD = 10; YY&3M
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/* \Mi] !b|8
* (non-Javadoc) +PCsp'D d
* Usa
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eHjna\C
*/ 't3@dz_dG
public void sort(int[] data) { 0v~Eu>Rg
int[] temp=new int[data.length]; vP_V%5~yN
mergeSort(data,temp,0,data.length-1); /SXms'C
} -<R"
sSh=Idrx
private void mergeSort(int[] data, int[] temp, int l, int r) { B@:11,.7
int i, j, k; [RZ}9`V
int mid = (l + r) / 2; ?8j#gYx2
if (l == r) z>,fuR?9
return; zoj3w|G
if ((mid - l) >= THRESHOLD) <Z$r\Huf
mergeSort(data, temp, l, mid); i8]2y
else wR x5` @
insertSort(data, l, mid - l + 1); GN7\p)
if ((r - mid) > THRESHOLD) FMuakCic5
mergeSort(data, temp, mid + 1, r); ^/)!)=?
else ?|&plf|
insertSort(data, mid + 1, r - mid); \Y EV 5
\z/_vzz4
for (i = l; i <= mid; i++) { 34@f(^d+^
temp = data; bZ/4O*B
} Cb{n4xKW6
for (j = 1; j <= r - mid; j++) { .g|D
temp[r - j + 1] = data[j + mid]; \:ELO[(#|{
} 'CrBxaA]s
int a = temp[l]; &$'=SL(Z
int b = temp[r]; LC!ZeW35
for (i = l, j = r, k = l; k <= r; k++) { |o:[*2-
if (a < b) { .^?^QH3
data[k] = temp[i++]; #rE#lHo
a = temp; DeMF<)#
} else { HjX!a29Wf
data[k] = temp[j--]; *\UxdL 22
b = temp[j]; c|kQ3(
} ;[)t*yAh
} liYR8D |
} 5M.KF;P
97$1na3gq
/** #WOb&h
* @param data 7c:5Ey
* @param l 6Y#V;/gK!5
* @param i \Oku<5
*/ ]^>#?yEA3
private void insertSort(int[] data, int start, int len) { efK)6T^p
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); D92#&,KD
} *ybwlLg
} !kPZuU`T
} m&'z|eN
} ^'g1? F$_
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堆排序： -rEg(@S %
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package org.rut.util.algorithm.support; v{R:F
jh3LD6|s}
import org.rut.util.algorithm.SortUtil; `7;I*|
D]I]I!2c
/** IX|2yu4
* @author treeroot ?\HXYCi0r
* @since 2006-2-2 7R$]BY=
* @version 1.0 O_PKS$sz{
*/ l )hg!(
public class HeapSort implements SortUtil.Sort{ Hkc:B/6
%cDTy]ILu
/* (non-Javadoc) )N) "O? W9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I+) Acy;
*/ E&?z-,-o@
public void sort(int[] data) { ozs xqN
MaxHeap h=new MaxHeap(); bS0z\!1
h.init(data); l_G&#sQ0
for(int i=0;i h.remove(); Wcgy:4K3
System.arraycopy(h.queue,1,data,0,data.length); ([-xM%BI6
} QE:%uT
Q7ez?]j6
private static class MaxHeap{ aB`x5vg7ho
k)2L<Lmn
void init(int[] data){ Q( WE.ux)<
this.queue=new int[data.length+1]; K%Sy~6iD&
for(int i=0;i queue[++size]=data; =Vgj=19X(
fixUp(size); xK`.^W
} Unl6?_
} _&/FO{F@m
va(ZGGS]N
private int size=0; zU+` o?al
cVzOW|NVx
private int[] queue; mSWh'1]b.~
fbbk;Rq.'3
public int get() { x)X=sX.
return queue[1]; eBD7g-
} oQrkd:
T~nmEap
public void remove() { ZaCUc Px
SortUtil.swap(queue,1,size--); *):xK;o
fixDown(1); cuJ%;q=;
} 2?]NQE9lA
file://fixdown sW#}QYd
private void fixDown(int k) { ^9})@,(D
int j; ^ fo2sN"
while ((j = k << 1) <= size) { ,gR9~k,
if (j < size %26amp;%26amp; queue[j] j++; *k$":A
if (queue[k]>queue[j]) file://不用交换 NqsIMCl
break; T)IH4UO
SortUtil.swap(queue,j,k); bK)gB!
k = j; +4kBd<0Y
} ~Wq[H
} J?ljqA}i
private void fixUp(int k) { bDLPA27
while (k > 1) { }gE?ms4$
int j = k >> 1; Ok-*xd
if (queue[j]>queue[k]) Az_s"}G
break; 3pSkk
SortUtil.swap(queue,j,k); Q\H_lB
k = j; {DPobyvwFk
} u`l1 zMk
} >?b9Xh
g-c\;
} HvWnPh1l
Ns6Vf5T.
} 83*"58
qg;[~JZYKi
SortUtil： */B-%*#I.
8^3Z]=(Q
package org.rut.util.algorithm; Qrt[MJ+#
+L4_]
import org.rut.util.algorithm.support.BubbleSort; i,=CnZCh
import org.rut.util.algorithm.support.HeapSort; -[kbHrl&
import org.rut.util.algorithm.support.ImprovedMergeSort; b"+J8W
import org.rut.util.algorithm.support.ImprovedQuickSort; M1Jnn4w*d
import org.rut.util.algorithm.support.InsertSort; \R>!HY
import org.rut.util.algorithm.support.MergeSort; ;cBFft}D
import org.rut.util.algorithm.support.QuickSort; Qt_LBJUWV
import org.rut.util.algorithm.support.SelectionSort; )'{:4MX
import org.rut.util.algorithm.support.ShellSort; NX?J
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/** W/PZD (
* @author treeroot $]/a/!d
* @since 2006-2-2 Z3K~C_0Cnu
* @version 1.0 lFT_J?G$'
*/ +zpmy3Q
public class SortUtil { 9/LI[{
public final static int INSERT = 1; ,|4%YaN.3
public final static int BUBBLE = 2; 1mw<$'pm0
public final static int SELECTION = 3; ~=5vc''
public final static int SHELL = 4; lY5a=mwHU
public final static int QUICK = 5; 66"-Xf~u
public final static int IMPROVED_QUICK = 6; |V2+4b,
public final static int MERGE = 7; &lYZ=|6
public final static int IMPROVED_MERGE = 8; ~Co7%e V
public final static int HEAP = 9; ;;E "+.
;Ry )^5Q
public static void sort(int[] data) { z.f~wAT@<
sort(data, IMPROVED_QUICK); 2}P<}-?6
} 'l$<DcBj
private static String[] name={ Ak!l}d
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" A&i
}; 5b_[f(
RVmD&
private static Sort[] impl=new Sort[]{ v*Qr(4
new InsertSort(), i[b?W$]7
new BubbleSort(), pIh%5ZU
new SelectionSort(), uy~KJn?Tu
new ShellSort(), [@@Ovv
new QuickSort(), *yGOmi
new ImprovedQuickSort(), >r7{e:~q
new MergeSort(), $wa )e
new ImprovedMergeSort(), K[ZgT$zZ
new HeapSort() iVM{ L
}; oI9Jp`
4C&L%A
public static String toString(int algorithm){ ]9?_m@Ihx
return name[algorithm-1]; U!sv6=(y@
} 1]r+$L3
irNGURLm
public static void sort(int[] data, int algorithm) { s}Q%]W
impl[algorithm-1].sort(data); dKcHj<'E/
} p1 tfN$-
^a@Vn\V1
public static interface Sort { X*Mw0;+T
public void sort(int[] data); v>TI.;{y
} WP1>)
8phcekh+
public static void swap(int[] data, int i, int j) { C%<[mM
int temp = data; !*wK4UcX"
data = data[j]; iG*3S)
data[j] = temp; %J\1W"I?
} ^+:_S9qst
} 9 |Iq&S