[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; +HfjnEbtBs
} aG"UV\
int i1=l; m|-O/6~
int i2=mid+1; %ZQl.''ISa
for(int cur=l;cur<=r;cur++){ gbInSp`4
if(i1==mid+1) Qe4
data[cur]=temp[i2++]; RCmPZ
else if(i2>r) -|3U0:'m
data[cur]=temp[i1++]; ^iI^)
else if(temp[i1] data[cur]=temp[i1++]; 5-C6;7%:
else 7'&Xg_
data[cur]=temp[i2++]; !c*^:0
} T}\U:@b
} &O%Kj8)
;bA9(:?
} I{RktO;1
fB:M'A'
改进后的归并排序: p(U'Ydl~
z.jGVF4
package org.rut.util.algorithm.support; MT V'!Zxs
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import org.rut.util.algorithm.SortUtil; fO:*85%}7
zY#U]Is
/** ^QnVYTM
* @author treeroot +0=RC^
* @since 2006-2-2 *PMql$
* @version 1.0 `b] NB^/
*/ oF*Y$OEu?c
public class ImprovedMergeSort implements SortUtil.Sort { fqr}tvMr=T
cw^FOV*
private static final int THRESHOLD = 10; 0<s)xaN>Y
[t6)M~&e:_
/* wo_FM `@
* (non-Javadoc) a;h:o>Do5
* sF|$oyDE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K]7@%cS
*/ |C(72t?K
public void sort(int[] data) { "qDEI}
int[] temp=new int[data.length]; .&[nS<~`
mergeSort(data,temp,0,data.length-1); L?Lp``%bI7
} MP3E]T~:
b;}MA7=
private void mergeSort(int[] data, int[] temp, int l, int r) { t7~mW$}O
int i, j, k; nY*ODL
int mid = (l + r) / 2; m?m,w$K
if (l == r) qQom=x
return; U^,ld`
if ((mid - l) >= THRESHOLD) PD$'xY|1=
mergeSort(data, temp, l, mid); MDB}G '
else W5x]bl#
insertSort(data, l, mid - l + 1); UGN. ]#"#
if ((r - mid) > THRESHOLD) jAJkCCG
mergeSort(data, temp, mid + 1, r); WK=!<FsC$
else 1/{:}9Z@
insertSort(data, mid + 1, r - mid); 2HTZ,W
I@z{Gr
for (i = l; i <= mid; i++) { \{&55>
temp = data; i 9b^\&&
} '!Sj]+
for (j = 1; j <= r - mid; j++) { _{ba
temp[r - j + 1] = data[j + mid]; |_ @iaLE
} |fJ,+)_(
int a = temp[l]; ?(|!VLu
int b = temp[r]; m.$Oo Mu'
for (i = l, j = r, k = l; k <= r; k++) { {-E{.7
if (a < b) { \(z)]D
data[k] = temp[i++]; gr2zt&Z4
a = temp; ,sc>~B@Q
} else { *|jqRfa"
data[k] = temp[j--]; "TxXrt%>A
b = temp[j]; RM`8P5i]sF
} 62zlO{ >rJ
} kO5KZ;+N-
} U{R*WB b
y=&)sq
/** k9bU<
* @param data >a0;|;hp
* @param l FINM4<s)
* @param i 7'o?'He-.2
*/ w"sRK
private void insertSort(int[] data, int start, int len) { Y# lE
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); #?-W.
} #F9$"L1Hg
} @-7K~in?^
} 1X{A}9nA
} ]xS< \{og
x##Iv|$
堆排序： *(HH71Y
c]n4vhUa5
package org.rut.util.algorithm.support; XRz.R/
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import org.rut.util.algorithm.SortUtil; r|P4|_No
HL)1{[|`
/** ZWr\v!4
* @author treeroot p*N+B o
* @since 2006-2-2 m2V4nxw]Qp
* @version 1.0 :4;>).
*/ g3qtWS
public class HeapSort implements SortUtil.Sort{ Ii K&v<(]
;;U2I5 M7
/* (non-Javadoc) t,H,*2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )8vcg{b{d
*/ s_kI\w4(x1
public void sort(int[] data) { M'g4alS
MaxHeap h=new MaxHeap(); (0k0gq;
h.init(data); 'LX=yL]I
for(int i=0;i h.remove(); [2 Rp.?
System.arraycopy(h.queue,1,data,0,data.length); crmnh4-
} kTnvD|3_!P
-&HN h\
private static class MaxHeap{ ;lK2]
2f-Z\3)9 J
void init(int[] data){ GRs;-Jt
this.queue=new int[data.length+1]; l"vT@g|
for(int i=0;i queue[++size]=data; foN;Q1?lS
fixUp(size); hQkmB|];5
} ";zl6g"
} pGOS'.K%t8
%+'&$
private int size=0; (_W[~df4
q5`Gl
private int[] queue; |6uEf/*DX
CZ0 {*K:
public int get() { 9np<r82
return queue[1]; W]R5\G*
} gG$o8c-
A#p@`|H#B
public void remove() { 1%+0OmV&
SortUtil.swap(queue,1,size--); Llzowlfe
fixDown(1); P"~B2__*
} ?r@ZTuq#
file://fixdown mhs%b4'>
private void fixDown(int k) { T^Z#x-Q
int j; !KF;Z|_(I
while ((j = k << 1) <= size) { -Zw"o>
if (j < size %26amp;%26amp; queue[j] j++; N[mOJa:
if (queue[k]>queue[j]) file://不用交换 Ea3tF0{
break; G{s ,Y^
SortUtil.swap(queue,j,k); $4?%Z>'
k = j; k20H|@g2
} `C=p7%
} m+!%+S1
private void fixUp(int k) { J^?O]|
while (k > 1) { >:K3y$]_
int j = k >> 1; c1z5t]d
if (queue[j]>queue[k]) N1SRnJu<f
break; ?e ~*,6
SortUtil.swap(queue,j,k); O35f5Kz
k = j; :3G9YjzC}
} G/D{K$=t~
} \mycn/e
]-q:Z4rb
} [F>zM
n%O`K{86
} ^X?[zc GE
;Joo!CXHO
SortUtil： .K0BK)axO
ZuE0'9
package org.rut.util.algorithm; 2ru6bIb;
\2LCpN
import org.rut.util.algorithm.support.BubbleSort; 1DBzD%@Oz
import org.rut.util.algorithm.support.HeapSort; !K@yB)9
import org.rut.util.algorithm.support.ImprovedMergeSort; ^8\pJg_0
import org.rut.util.algorithm.support.ImprovedQuickSort; G(4k#jB
import org.rut.util.algorithm.support.InsertSort; $M><K
import org.rut.util.algorithm.support.MergeSort; y}3V3uqK
import org.rut.util.algorithm.support.QuickSort; QO%LSRw
import org.rut.util.algorithm.support.SelectionSort; zzxU9m~"
import org.rut.util.algorithm.support.ShellSort; B O"+m
{!="PnB
/** %?g]{
* @author treeroot {7;TQ?/
* @since 2006-2-2 :DZiDJ@
* @version 1.0 6?Wsg`9
*/ j9,X.?Xvx
public class SortUtil { |)lo<}{
public final static int INSERT = 1; Tu"yoF
public final static int BUBBLE = 2; m760K*:i\
public final static int SELECTION = 3; T&h|sa(
public final static int SHELL = 4; ' ZB%McS
public final static int QUICK = 5; f]hW>-B(q
public final static int IMPROVED_QUICK = 6; (Hsfrc
public final static int MERGE = 7; .!`j3W]
public final static int IMPROVED_MERGE = 8; ,rN7X<s54
public final static int HEAP = 9; >s>5k O
dp?uq'
public static void sort(int[] data) { ]f\rB8k|&
sort(data, IMPROVED_QUICK); K[9<a>D`
} {<i!Pm
private static String[] name={ }Jc^p
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" CUtk4;^y#
}; ?,!qh
)Qo6bei!
private static Sort[] impl=new Sort[]{ QR#,n@fE
new InsertSort(), (kSkbwu
new BubbleSort(), EUNG&U
new SelectionSort(), 9fV57
new ShellSort(), N0XGW_f
new QuickSort(), XR+2|o
new ImprovedQuickSort(), 9*x9sfCv9
new MergeSort(), 57#:GN$EL
new ImprovedMergeSort(), X$xqu\t7
new HeapSort() "47nc1T+n
}; 8=?I/9Xh
-8TLnl~[
public static String toString(int algorithm){ ;CC[>
return name[algorithm-1]; 8?(4E 'vf
} }{ P}P}
Rw7Q[I5z%
public static void sort(int[] data, int algorithm) { w?R6$n`
impl[algorithm-1].sort(data); lyT~>.?{
} ND`~|6yb
2vur_`cV
public static interface Sort { oi!E v_h
public void sort(int[] data); 1]qhQd-u
} C{,nDa?|
d9^h YS{
public static void swap(int[] data, int i, int j) { OU[Sm7B
int temp = data; c2y5[L7?
data = data[j]; 4v{gc/g
data[j] = temp; c1Hv^*Y
} )9*-Q%zc
} ]02V,'x