[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; 8 $0D-z
} sfi.zuG
int i1=l; <m9hM?^q
int i2=mid+1; xy$73K6
for(int cur=l;cur<=r;cur++){ b'Qia'a%
if(i1==mid+1) "P HkbU
data[cur]=temp[i2++]; {8UYu2t
else if(i2>r) *"` dO9Yf_
data[cur]=temp[i1++]; *T j(IN
else if(temp[i1] data[cur]=temp[i1++]; OiX:h#
else ^pZ1uN!b
data[cur]=temp[i2++]; >k,|N4(
} @#K19\dQ
} l CHaRR7
90> (`pI=
} `rsPIOu
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改进后的归并排序: $Z6g/bD`E
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package org.rut.util.algorithm.support; %eWzr
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import org.rut.util.algorithm.SortUtil; lY/{X]T.(
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/** QQUeY2}
* @author treeroot \O5`R-
* @since 2006-2-2 |m7U^
* @version 1.0 %0C<_drW
*/ u-PAi5&n
public class ImprovedMergeSort implements SortUtil.Sort { sm5\> L3V
Y-\hV6v6
private static final int THRESHOLD = 10; &Oc^LV$6
n 1MZHa,
/* =r"8J5[f
* (non-Javadoc) _O)xE9t#ru
* /!;oO_U:#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1>P[3Y@}
*/ qd#?8
public void sort(int[] data) { qp_lMz
int[] temp=new int[data.length]; .gTla
mergeSort(data,temp,0,data.length-1); Hs/ aU_
} Pe6}y
H-A?F^#
private void mergeSort(int[] data, int[] temp, int l, int r) { |D+"+w/
int i, j, k; d4KTwn5g
int mid = (l + r) / 2; IWcgh`8
if (l == r) OV3l)73?t
return; v+uq
if ((mid - l) >= THRESHOLD) HE58A.Q&
mergeSort(data, temp, l, mid); M#X8Rs1`
else a0I+|fR
insertSort(data, l, mid - l + 1); zWKnkIit,
if ((r - mid) > THRESHOLD) 1BT]_ cP
mergeSort(data, temp, mid + 1, r); *I6z;.#
else 4-;"w;
insertSort(data, mid + 1, r - mid); {Q],rv|;
FY_.Vp
for (i = l; i <= mid; i++) { d%_=r." Y
temp = data; |f), dC
} |U{9Yy6p
for (j = 1; j <= r - mid; j++) { K ;\~otR^
temp[r - j + 1] = data[j + mid]; 2Ya)I k{
} MuXp*s3[
int a = temp[l]; O O?e8OU
int b = temp[r]; FsQeyh>
for (i = l, j = r, k = l; k <= r; k++) { @_s`@,=
if (a < b) { Ie{98
data[k] = temp[i++]; hhd%j6
a = temp; 'i5 VU4?K
} else { t80s(e
data[k] = temp[j--]; _5TSI'@.4
b = temp[j]; V/|).YG2
} su;u_rc,
} R<.<wQ4I
} ~hK7(K
F.5'5%
/** Z(DCR/U=(>
* @param data d: D`rpcC
* @param l oV"d%ks
* @param i S3#NGBZ/
*/ B1<:nl
private void insertSort(int[] data, int start, int len) { D.d(D:
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Z9X<W`
} MzjV>.
} D![42H+-Qd
} E;!pK9wL|
} $A~UA
zVN/|[KP4
堆排序： GL;@heP
y/=:F=H@w
package org.rut.util.algorithm.support; 6v8HR}iK
58xaVOhb
import org.rut.util.algorithm.SortUtil; Ku;|Dz/=o
\f| Hk*@
/** hOYm =r
* @author treeroot 9R_2>BDn
* @since 2006-2-2 EmrUzaGD
* @version 1.0 od~^''/b
*/ (Z:(f~;
public class HeapSort implements SortUtil.Sort{ EUBJnf:q
@1+C*
/* (non-Javadoc) S&/</%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |OW/-&)
*/ t^_0w[
public void sort(int[] data) { YywiY).]@
MaxHeap h=new MaxHeap(); @ig'CF%(
h.init(data); [5[}2B_t
for(int i=0;i h.remove(); be&5vl
System.arraycopy(h.queue,1,data,0,data.length); ,RmXZnWY
} h>ZNPP8N
Oi#4|*b{W
private static class MaxHeap{ yx5F]Z<M2
nW)-bAV<
void init(int[] data){ =^liong0
this.queue=new int[data.length+1]; lMkDLobos
for(int i=0;i queue[++size]=data; 0$=Uhi
fixUp(size); ?O(@BT
} BR&T,x/d
} GMk\ l
k^<s|8Y
private int size=0; TUE*mDRmP
}f rij1/G
private int[] queue; Mc8|4/<Z
u&4CXv=
public int get() { 5ggmS<=
return queue[1]; fZQL!j4
} q/T(s
` =ocr8c
public void remove() { b\6)whh
SortUtil.swap(queue,1,size--); .<xzf4C
fixDown(1); &[u>^VO8
} :LE0_ .
file://fixdown lKVy{X3]*
private void fixDown(int k) { j@chSk"K
int j; jbQ N<`!
while ((j = k << 1) <= size) { XKp$v']u
if (j < size %26amp;%26amp; queue[j] j++; #+VH]7]
if (queue[k]>queue[j]) file://不用交换 yf|,/{S
break; !Cqm=q{K
SortUtil.swap(queue,j,k); Wp2W:JX:
k = j; @|I:A
} -dRnozs6W
} "n<rP 3y
private void fixUp(int k) { 7JC^+rk
while (k > 1) { c}XuzgSY
int j = k >> 1; \R"}=7
if (queue[j]>queue[k]) 'K|Jg.2
break; k8>(-W"A
SortUtil.swap(queue,j,k); }s*H|z
k = j; VSm[80iR0
} 01N]|F:
} a#i85su
U2Uf69R
} 7CKpt.Sz6
cZ8lRVaWW
} |\HYq`!g%7
~Te9Lq|
SortUtil： WUC-*(
'eM90I%(
package org.rut.util.algorithm; t1LIZ5JY
=1!,A
import org.rut.util.algorithm.support.BubbleSort; \VL_
import org.rut.util.algorithm.support.HeapSort; xXa* d
import org.rut.util.algorithm.support.ImprovedMergeSort; S7|6dwQ&
import org.rut.util.algorithm.support.ImprovedQuickSort; xg:r5Z/|)
import org.rut.util.algorithm.support.InsertSort; 25bbuhss
import org.rut.util.algorithm.support.MergeSort; 2X];zY
import org.rut.util.algorithm.support.QuickSort; {J aulg
import org.rut.util.algorithm.support.SelectionSort; #=}dv8
import org.rut.util.algorithm.support.ShellSort; o0yyP,?yh
v~l_6V}
/** * ':LBc=%
* @author treeroot *.'9eC0s
* @since 2006-2-2 jCJbmEfo9@
* @version 1.0 <5Ye')+
*/ }JP0q
public class SortUtil { S\\3?[!p
public final static int INSERT = 1; W^o*^v
public final static int BUBBLE = 2; trl:\m
public final static int SELECTION = 3; Z`FEB0$
public final static int SHELL = 4; Sio> QL Y
public final static int QUICK = 5; $`KddW0_
public final static int IMPROVED_QUICK = 6; $A4rdhvd
public final static int MERGE = 7; jb~W(8cj
public final static int IMPROVED_MERGE = 8; tEU}?k+:j)
public final static int HEAP = 9; E1|>O
5g x9W\a ?
public static void sort(int[] data) { 98c##NV(7|
sort(data, IMPROVED_QUICK); knX*fp
} 7@[HRr
private static String[] name={ y_s^dQe
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <N4)X"s
}; *\-R&8
TT85G&#
private static Sort[] impl=new Sort[]{ %VV\biO]
new InsertSort(), rNi]|)-ET
new BubbleSort(), $ 8"we
new SelectionSort(), a\K__NCrX
new ShellSort(), jY~W*
new QuickSort(), |JUb 1|gi
new ImprovedQuickSort(), z;c~(o@4
new MergeSort(), 7o+JQ&fF;
new ImprovedMergeSort(), ;~A-32;Y4
new HeapSort() <yoCW?#
}; FW~{io]n
Q140b;Z
public static String toString(int algorithm){ Sckt gp8
return name[algorithm-1]; DH@]d0N
} O^Y}fo'
=up!lg^M
public static void sort(int[] data, int algorithm) { \d"uR@$3mG
impl[algorithm-1].sort(data); "mbjS(-eg
} }NH\Q$IU
fXL&?~fS
public static interface Sort { QU#u5sX A
public void sort(int[] data); iY|zv|;]=
} P#8+GN+bF
aEO``W
public static void swap(int[] data, int i, int j) { QNN*/n
int temp = data; {6y@;Fd
data = data[j]; @;6I94Bp
data[j] = temp; ?Aq \Gr
} ].TAZ-4s
} Mu1H*;_8