[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; MSrY*)n!>O
} d~xU?)n)
int i1=l; is_dPc
int i2=mid+1; Xk$l-Zfse
for(int cur=l;cur<=r;cur++){ (tz_D7c$F
if(i1==mid+1) WP#_qqO
data[cur]=temp[i2++]; bl!f5ROS(
else if(i2>r) :w&)XI34
data[cur]=temp[i1++]; kxKnmB#m-
else if(temp[i1] data[cur]=temp[i1++]; !xx> lX5
else 9^[5!SMzCj
data[cur]=temp[i2++]; ]I.& .?^i0
} "gl:4|i'
} 4jyr\=42F'
J,77pf!B
} ;JD3tM<
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改进后的归并排序: 1RUbY>K#U
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package org.rut.util.algorithm.support; BD-c 0-+m
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import org.rut.util.algorithm.SortUtil; :\w[xqH
)su <Ji*
/** ^5'/ }iR2N
* @author treeroot *Yk8Mj^_h
* @since 2006-2-2 >cr_^(UW&
* @version 1.0 Lw+1|
*/ 6^z\;,p
public class ImprovedMergeSort implements SortUtil.Sort { bQ\-6dOtv
,B/p1^;.
private static final int THRESHOLD = 10; "!_ 4%z-
6/WK((Fd
/* RNrYT|
* (non-Javadoc) +qW w-8
* 1j)!d$8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A%czhF
*/ r)@&2b"q
public void sort(int[] data) { GPqB\bxb'
int[] temp=new int[data.length]; 6xzR*~7
mergeSort(data,temp,0,data.length-1); 'rq#q)1MT
} kI[O{<kQ
p31rhe
private void mergeSort(int[] data, int[] temp, int l, int r) { gBiQIhz
int i, j, k; `J7Lecgo
int mid = (l + r) / 2; He_(JXTP
if (l == r) i11GW
return; ~1]2A[`s!
if ((mid - l) >= THRESHOLD) /KvPiQ%
mergeSort(data, temp, l, mid); ZT6X4 Z
else MHT,rqG
insertSort(data, l, mid - l + 1); 2Q'XB
if ((r - mid) > THRESHOLD) V<7K!<g)b
mergeSort(data, temp, mid + 1, r); {s^ryv_}
else ,m'#>d&zO
insertSort(data, mid + 1, r - mid); V1b_z
0<]!G|;|
for (i = l; i <= mid; i++) { !m:PBl5
temp = data; "M#`y!__
} a=T7w;\h
for (j = 1; j <= r - mid; j++) { P(i2bbU
temp[r - j + 1] = data[j + mid]; ci NTYow
} .yh2ttf<gB
int a = temp[l]; 8sjHQ)<
int b = temp[r]; ht)*Ync
for (i = l, j = r, k = l; k <= r; k++) { C05{,w?
if (a < b) { ].T;x|
data[k] = temp[i++]; $cpQ7
a = temp; y#Sw>-zRq
} else { @`+$d=rO`
data[k] = temp[j--]; A_*Lo6uII
b = temp[j]; HNUR6H&Fta
} *]| JX&
} .VEfd4+ni{
} IS*"_o<AR
]}L1W`n
/** Iybpk?,M+
* @param data Olh%"=*;
* @param l j#>![km Mu
* @param i h \cK
*/ pC.4AkEO
private void insertSort(int[] data, int start, int len) { ,) jB<`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); jG ;(89QR/
} ?,e:c XhE2
} ^F0jI5j).
} ITqigGan%
} 2u H\8A+'f
3rdxXmx
堆排序： `ip69 IF2*
HPCA$LD
package org.rut.util.algorithm.support; f#Oz("d
x]+KO)I
import org.rut.util.algorithm.SortUtil; $"n)C
iKH T
/** 19{?w6G<k
* @author treeroot [Et\~'2w8=
* @since 2006-2-2 qa`(,iN
* @version 1.0 ;9 n8on\
*/ n ZZQxV,
public class HeapSort implements SortUtil.Sort{ nln[V$
$,#IPoi~X
/* (non-Javadoc) WY~[tBi\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +~.Jw#HqS
*/ ly5L-=Xb
public void sort(int[] data) { >:nJTr
MaxHeap h=new MaxHeap(); 4n)Mx*{
h.init(data); l8lR5<
for(int i=0;i h.remove(); G'C^C[_W
System.arraycopy(h.queue,1,data,0,data.length); &L`p4AZ
} x&b-Na3Xi
3o/a8
private static class MaxHeap{ TmAb! Y|F
V)jhyCL
void init(int[] data){ -^Va]Lk
this.queue=new int[data.length+1]; 1Nu`@)D0
for(int i=0;i queue[++size]=data; \)kAhKtG
fixUp(size); Px&Mi:4tG
} Pg C]@Q%
} leJd){
]h$TgX
private int size=0; IH:Cm5MV
1/J*ki+?
private int[] queue; <"%h1{V
h;[Ncj]
public int get() { 6{WT;W>WT:
return queue[1]; S|w] Q
} L<]PK4
5R G5uH/-<
public void remove() { ,OAWGFKOp
SortUtil.swap(queue,1,size--); Jl,x~d
fixDown(1); nE%qm -
} t4f\0`jN
file://fixdown x"De 9SB
private void fixDown(int k) { M)Q+_c2*
int j; @6`@.iZ
while ((j = k << 1) <= size) { D$ z!wV
if (j < size %26amp;%26amp; queue[j] j++; 8}@a?QS(&
if (queue[k]>queue[j]) file://不用交换 P*sCrGO%
break; W4a20KM2
SortUtil.swap(queue,j,k); d_B5@9e#
k = j; "S#hzrEdYI
} El}z^e
} H@2+wr)$}
private void fixUp(int k) { `"4EE}eQc
while (k > 1) { 6* w;xf
int j = k >> 1; _zwuK1e
if (queue[j]>queue[k]) 0q!{&pt
break; aa]v7d
SortUtil.swap(queue,j,k); U%l{>*q
k = j; t/(j8w
} \zyGJyy.
} Mpx.n]O.
\C|06Bs$
} =p$Wo
+N:%`9}2V
} Z^S!w;eu
/9Xf[<
SortUtil： 5Px_vtqP
(^\i(cfu6Q
package org.rut.util.algorithm; HrxEC)V6#
w+H=Xh4t
import org.rut.util.algorithm.support.BubbleSort; `#U6`[[
import org.rut.util.algorithm.support.HeapSort; Pp!W$C:
import org.rut.util.algorithm.support.ImprovedMergeSort; 9hU@VPB~
import org.rut.util.algorithm.support.ImprovedQuickSort; \SR
import org.rut.util.algorithm.support.InsertSort; 1qF.0
import org.rut.util.algorithm.support.MergeSort; wS4wED&a
import org.rut.util.algorithm.support.QuickSort; |{Q,,<C
import org.rut.util.algorithm.support.SelectionSort; ^;bkU|(`6
import org.rut.util.algorithm.support.ShellSort; 24fWj?A|^
\ 3N#%
/** .EQFHStr
* @author treeroot o 8U2vMH
* @since 2006-2-2 cPSu!u}D
* @version 1.0 5N/;'ySAE_
*/ Q<qIlNE
public class SortUtil { _i#Z'4?2E
public final static int INSERT = 1; ok'1
public final static int BUBBLE = 2; HL]?CWtGP
public final static int SELECTION = 3; $'Z!Y;Ue
public final static int SHELL = 4; &D#v0!e~x
public final static int QUICK = 5; :QNEA3Q
public final static int IMPROVED_QUICK = 6; 7 &Aakl
public final static int MERGE = 7; wDk[)9#A
public final static int IMPROVED_MERGE = 8; RZjR d
public final static int HEAP = 9; \ZB;K~BV&
3ssio-X
public static void sort(int[] data) { j?A+qk
sort(data, IMPROVED_QUICK); <[bDNe["?
} .wywO|
private static String[] name={ 19_F\32
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" qMkP/BjV
}; C Qebb:y
Oc>-jhx?
private static Sort[] impl=new Sort[]{ {U9jA_XX
new InsertSort(), "yumc5kt
new BubbleSort(), (@Bm2gH
new SelectionSort(), JQqDUd
new ShellSort(), 2StpcAlU}
new QuickSort(), =Ao;[j)*!
new ImprovedQuickSort(), #*~Uu.T
new MergeSort(), jWz-7BO
new ImprovedMergeSort(), kH'Cx^=c6h
new HeapSort() 6-~
}; foeVjL:T
6`i'
public static String toString(int algorithm){ lMP7o&
return name[algorithm-1]; ?#'qY6 ^
} {BF\G%v;+
q%"nk
public static void sort(int[] data, int algorithm) { SO%5ts
impl[algorithm-1].sort(data); E$T#o{pai
} <KpQu%2(
=%p"oj]:
public static interface Sort { 5^k#fl2
public void sort(int[] data); R[(,wY_1
} ! 9e>J
|Yx8Ez
public static void swap(int[] data, int i, int j) { 1#V0g Q
int temp = data; qrdI"
data = data[j]; qhtc?A/0}
data[j] = temp; khR3[ju{^
} d7&PbITN
} AYi$LsLhO