[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; Vk{0)W7
} %0fj~s;
int i1=l; dKZffDTZ
int i2=mid+1; f^m8 4o'
for(int cur=l;cur<=r;cur++){ VUagZ7p
if(i1==mid+1) Z+I[
data[cur]=temp[i2++]; 'X@j
else if(i2>r) PM o>J|^
data[cur]=temp[i1++]; VEE:Z^U!
else if(temp[i1] data[cur]=temp[i1++]; PyzWpf
else AP/tBCeM
data[cur]=temp[i2++]; wjKW 3
} )5'S=av9
} CZ|Y o
&eK8v]|"W
} _U#ue
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改进后的归并排序: T"dWrtO
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package org.rut.util.algorithm.support; fvN2]@:
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import org.rut.util.algorithm.SortUtil; |]\qI
0#XZ_(@%
/** n8R{LjJ2@
* @author treeroot ?}B_'NZ%
* @since 2006-2-2 :+!hR4Z~\;
* @version 1.0 CO5?UgA
*/ \T<?=A
public class ImprovedMergeSort implements SortUtil.Sort { jc)D*Cf
pA1Tod
private static final int THRESHOLD = 10; t4F1[P
B>|@XfPM
/* ]#+fQR$!
* (non-Javadoc) 0dXZd2oK@
* xqM R[W\x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A3M)yWq
*/ 0m51nw~B
public void sort(int[] data) { YujhpJ<
int[] temp=new int[data.length]; UO>p-M
mergeSort(data,temp,0,data.length-1); 2Hy$SSH
} ~(4cnD)BO
Q4_j`q
private void mergeSort(int[] data, int[] temp, int l, int r) { MLId3#Q
int i, j, k; 0u)]1
int mid = (l + r) / 2; 5Lm ?
if (l == r) >|uZIcs 6
return; m|=/|Hm
if ((mid - l) >= THRESHOLD) a?\ Au
mergeSort(data, temp, l, mid); V4ayewVX
else Gi ZyC
insertSort(data, l, mid - l + 1); 70*Y4'u}A
if ((r - mid) > THRESHOLD) (MwB%g
mergeSort(data, temp, mid + 1, r); }$81FSKh
else )P\ec
insertSort(data, mid + 1, r - mid); GP`_R
q31swP
for (i = l; i <= mid; i++) { .* VZY
temp = data; 5 EDGl
} *.W![%Be
for (j = 1; j <= r - mid; j++) { sq&$
temp[r - j + 1] = data[j + mid]; 7lf* vqG
} b~%(5r.
int a = temp[l]; 8(5}Jo+
int b = temp[r]; ]?b#~
for (i = l, j = r, k = l; k <= r; k++) { X;ijCZb3b
if (a < b) { 5wiU4-{
data[k] = temp[i++]; <Cn-MOoM
a = temp; NfDg=[FN[
} else { p>65(&N,
data[k] = temp[j--]; >k kuw?O@
b = temp[j]; RzFv``g
} ~qco -b
} Ol D]*=.cO
} J?u@' "u
I:bi8D6
/** ] 6M- s
* @param data kCLz@9>FQ
* @param l XQHvs{Po
* @param i A;q}SO%b
*/ |brl<*:
private void insertSort(int[] data, int start, int len) { tE=P9 \4
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); rjx6Ad/\
} 1i#M(u_
} m7g; psg
} |HhUU1!
} h68sQd
U]d{hY."
堆排序： G W|~sE +
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package org.rut.util.algorithm.support; LIirOf~e;!
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import org.rut.util.algorithm.SortUtil; 9.D'!
YYZE-{ %
/** cZ%weQa#N)
* @author treeroot =<n+AqJ%
* @since 2006-2-2 *siS4RX2
* @version 1.0 r;I3N+
*/ QJ-6aB
public class HeapSort implements SortUtil.Sort{ -HS(<V=a?k
QcIa%lf
/* (non-Javadoc) K"#np!Y)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V!a\:%#^Y
*/ )TBBYCL3
public void sort(int[] data) { O: :X$O7
MaxHeap h=new MaxHeap(); e>z3\4
h.init(data); pDrM8)r
for(int i=0;i h.remove(); \h,S1KmIBD
System.arraycopy(h.queue,1,data,0,data.length); E@Q+[~H}
} &0*j nb
x.xfMM2n
private static class MaxHeap{ D CcM~
'8}*erAg
void init(int[] data){ `SZ^~O
this.queue=new int[data.length+1]; : H0+}=
for(int i=0;i queue[++size]=data; 3?.3Z!H/
fixUp(size); ' DCrSa>
} `N]!-=o
} u-f_,],p
al(t-3`<
private int size=0; E[)`+:G]
~OAST
private int[] queue; tTX2>8Gmr
:,]V03
public int get() { aS-rRL|\L
return queue[1]; A8dIL5
} R'uM7,7
Wg3y y8vIW
public void remove() { `Q' 0l},
SortUtil.swap(queue,1,size--); 0ua.aL'
fixDown(1); ggzg,~V
} hwSn?bkw
file://fixdown )apqL{u:=
private void fixDown(int k) { -;Y*;xe
int j; b(wW;C'#0p
while ((j = k << 1) <= size) { 9EIHcUXe
if (j < size %26amp;%26amp; queue[j] j++; ,mx>)}l95
if (queue[k]>queue[j]) file://不用交换 )k.;.7dXe
break; ))K3pKyb
SortUtil.swap(queue,j,k); ^uD r
k = j; /608P:U
} nNSq6 Cj
} g0:mm,t\
private void fixUp(int k) { 2bPrND\P=
while (k > 1) { Ugp[Ugr
int j = k >> 1; #tRLvOR:
if (queue[j]>queue[k]) t5\~Z}G8
break; <w}YD @(f
SortUtil.swap(queue,j,k); MRMswNQ
k = j; J'G 6Z7
} GKTrf\"c
} b*+Od8r
pd?3_yU
} BA4qQCS;5
}S\\"SBC
} }Dc0 Y
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SortUtil： m-xSF]q=<
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package org.rut.util.algorithm; ,edX;`#
)hGRq'WA=
import org.rut.util.algorithm.support.BubbleSort; :aS8%m
import org.rut.util.algorithm.support.HeapSort; |JC/A;ZH
import org.rut.util.algorithm.support.ImprovedMergeSort; w+)MrB-}
import org.rut.util.algorithm.support.ImprovedQuickSort; Rq-BsMX!A
import org.rut.util.algorithm.support.InsertSort; 9%^q?S/Rv
import org.rut.util.algorithm.support.MergeSort; (C dx7v2Nh
import org.rut.util.algorithm.support.QuickSort; $b,o3eC
import org.rut.util.algorithm.support.SelectionSort; dMK|l
import org.rut.util.algorithm.support.ShellSort; JS]6jUB<B
oKLL~X>!U
/** }1=V`N(
* @author treeroot oJE~dY$Q
* @since 2006-2-2 .bE+dA6:v
* @version 1.0 ~Gx"gK0
*/ b_+dNoB
public class SortUtil { 9*pH[vH
public final static int INSERT = 1; 3J%(2}{y
public final static int BUBBLE = 2; 4E/Q+^?
public final static int SELECTION = 3; aKkL0D
public final static int SHELL = 4; JKN0:/t7Q
public final static int QUICK = 5; klmRU@D
public final static int IMPROVED_QUICK = 6; =~}\g;K1Q
public final static int MERGE = 7; KSe`G;{
public final static int IMPROVED_MERGE = 8; A\nL(Nd
public final static int HEAP = 9; $$ma1.t"
ca%s$' d
public static void sort(int[] data) { 9y"R,
sort(data, IMPROVED_QUICK); yAz`n[
} z UN&L7D
private static String[] name={ 8,d<&3D
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" .-2i9Bh6
}; dF$a52LS
cy T,tN
private static Sort[] impl=new Sort[]{ Eh/B[u7T[
new InsertSort(), kcGs2Y_*&
new BubbleSort(), )!M %clm.
new SelectionSort(), \ <b-I
new ShellSort(), }i0(^"SoXZ
new QuickSort(), pxy=edd
new ImprovedQuickSort(), JG\T2/b
new MergeSort(), "|ZC2Zu<
new ImprovedMergeSort(), {=};<;_F
new HeapSort() Qk2^p^ T6
}; +ExXhT
N.R,[K
public static String toString(int algorithm){ ?"-%>y@w
return name[algorithm-1]; ElLDSo@WvR
} -]HPDN,OB
*-0tj~)>
public static void sort(int[] data, int algorithm) { H <7r
impl[algorithm-1].sort(data); o,}`4_N||
} ,v(K|P@
r1dP9MT\8
public static interface Sort { pD;'uEFBQ
public void sort(int[] data); AT*J '37
} 7L2$(d4
|&!04~s;E
public static void swap(int[] data, int i, int j) { 0*G =~:
int temp = data; *q**,_?;
data = data[j]; |e49F
data[j] = temp; u By[x 0
} \[u7y. b
} cXP*?N4Cf