[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; zM6yUEg
} 3_=~7B) 8
int i1=l; CCKg,v
int i2=mid+1; WtI1h`Fo
for(int cur=l;cur<=r;cur++){ H3{x;{.b
if(i1==mid+1) xO'I*)
data[cur]=temp[i2++]; ~45u a
else if(i2>r) GZT}aMMSJ
data[cur]=temp[i1++]; }C>Q
else if(temp[i1] data[cur]=temp[i1++]; zi:F/TlUC
else /2^cty.BXw
data[cur]=temp[i2++]; J*6I@_{/U
} E%eao$
} 3ojK2F(1D
.fcU&t
} |Y3!Lix
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改进后的归并排序: 2'g< H-[
=fMSmn1S
package org.rut.util.algorithm.support; O{8"f\*
^)N[x''a
import org.rut.util.algorithm.SortUtil; ^&<~6y}U^
47I:o9E
/** >_M}l@1
* @author treeroot >V(>2eD'S
* @since 2006-2-2 .jMm-vox}
* @version 1.0 43rM?_72
*/ "FQh^+
public class ImprovedMergeSort implements SortUtil.Sort { @_YEK3l]l
b{)('C$
private static final int THRESHOLD = 10; TI}H(XL(
.Pq8C
/* qx 3.oU
* (non-Javadoc) k/l@P
* 4,9AoK)yp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =f@O~nGm
*/ tYIHsm\b
public void sort(int[] data) { IyG5Rj2
int[] temp=new int[data.length]; (PGmA>BT
mergeSort(data,temp,0,data.length-1); (Br$(XJoK}
} ?>MD/l(l
e<5+&Cj
private void mergeSort(int[] data, int[] temp, int l, int r) { x$CpUy{6
int i, j, k; 'R_U,9y`
int mid = (l + r) / 2; D,xWc|V
if (l == r) qt]QO1pAd
return; v,vTRrpK
if ((mid - l) >= THRESHOLD) 0!=e1_
mergeSort(data, temp, l, mid); .Q"3[
else OdQ>h$ gZ
insertSort(data, l, mid - l + 1); o0-e,F>u
if ((r - mid) > THRESHOLD) XBhWj\`(T
mergeSort(data, temp, mid + 1, r); QOuy(GY
else bI[!y#_z4
insertSort(data, mid + 1, r - mid); +WPi}
V.WfP*~NJ
for (i = l; i <= mid; i++) { /6{`6(p
temp = data; B2d$!Any
} >0 !J]gK
for (j = 1; j <= r - mid; j++) { 4\pA^%73
temp[r - j + 1] = data[j + mid]; }SitT\%
} w%S<N
int a = temp[l]; 5K'EuI)
int b = temp[r]; 7i{Rn K6*
for (i = l, j = r, k = l; k <= r; k++) { rQ}4\PTi
if (a < b) { qIjC-#a=m
data[k] = temp[i++]; PB>p"[ap4
a = temp; W/oRt<:E
} else { N(vbo
data[k] = temp[j--]; OpxVy _5,
b = temp[j]; yD1*^~loJ
} 2DQ'h}BI
} u-UUF
} ?^BsR
1@)]+* F*z
/** gbpm::
* @param data k6JB%m\E
* @param l $pk3d+0B
* @param i i`&yPw
*/ ]kb%l"&
private void insertSort(int[] data, int start, int len) { vzi=[A
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &8"a7$
} 344,mnAd
} j,/o0k,
} W\.f:"2qr
} /<:9NP'^
;x^&@G8W`
堆排序： EoU}@MjM~
;ok];4`a
package org.rut.util.algorithm.support; 5B'-&.Aj+
%c^]Rdl
import org.rut.util.algorithm.SortUtil; h>mQ; L
A!^K:S:@
/** /bCrpcH
* @author treeroot fS#/-wugOB
* @since 2006-2-2 &tMvs<q,
* @version 1.0 @1n0<V/
*/ 3tXtt@Yy
public class HeapSort implements SortUtil.Sort{ eg(xN/D
{h9#JMIA
/* (non-Javadoc) );))kYr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zN5i}U=|r
*/ "6Dz~5
public void sort(int[] data) { nt;A7pI`
MaxHeap h=new MaxHeap(); yE"hgdL
h.init(data); )W57n)]
for(int i=0;i h.remove(); ~fCD#D2KU
System.arraycopy(h.queue,1,data,0,data.length); -HoPECe
} J=zZGd%
GQF7]j/
private static class MaxHeap{ (59<Zo
yv3myaS
void init(int[] data){ |lJXI:GG
this.queue=new int[data.length+1]; 1pzU=!R?-O
for(int i=0;i queue[++size]=data; D%^EG8i n.
fixUp(size); \XRViG,|5
} ?-@hNrx
} ^[zF_df
<R3S{ty
private int size=0; EXJ>Z
B/5CjHz
private int[] queue; ev8E.ehD
}1R k]$XC
public int get() { {+C>^b
return queue[1]; I5x/N.
} &7@6Y{!/
2YwV}
public void remove() { 5j]}/Aq
SortUtil.swap(queue,1,size--); {xM%3
fixDown(1); ~]"}s(J;
} Q;5\( 0w5
file://fixdown HwU \[f
private void fixDown(int k) { *39sh[*}
int j; 3N]pN<3@
while ((j = k << 1) <= size) { _&F6As !{
if (j < size %26amp;%26amp; queue[j] j++; /o|@]SAe.
if (queue[k]>queue[j]) file://不用交换 e'\I^'`!M
break; p~3CXmUc~
SortUtil.swap(queue,j,k); ; $y.+5 q
k = j; R4IFl z
} xY!]eLZ)&
} 3I"&Qp%2
private void fixUp(int k) { K] Eq"3
while (k > 1) { sS-5W-&P{T
int j = k >> 1; mD)Nh
if (queue[j]>queue[k]) 8<]>q
break; a?JU(
SortUtil.swap(queue,j,k); x(S064
k = j; /@wm?ft6Gk
} wh*OD
} q1?2 U<
x7NxHTL
} RIJBHOa
}*R"yp
} :m37Fpz&b
^2mXXAQf7^
SortUtil： }>Os@]*'^(
w:umr#
package org.rut.util.algorithm; *:&fw'vd,
-9aht}Z
import org.rut.util.algorithm.support.BubbleSort; 'm2,7]
import org.rut.util.algorithm.support.HeapSort; 5T
import org.rut.util.algorithm.support.ImprovedMergeSort; ?L'k2J
import org.rut.util.algorithm.support.ImprovedQuickSort; S>"dUM
import org.rut.util.algorithm.support.InsertSort; s#d# *pgzh
import org.rut.util.algorithm.support.MergeSort; 5X`.2q=d
import org.rut.util.algorithm.support.QuickSort; 7PisX!c,h
import org.rut.util.algorithm.support.SelectionSort; C&5T;=<jKO
import org.rut.util.algorithm.support.ShellSort; y!v$5wi
@{nT4{
/** Vm6^'1CY
* @author treeroot 1%-?e``.
* @since 2006-2-2 MiSFT5$v6
* @version 1.0 Ab(bvS8r$
*/ Cog:6Gnw
public class SortUtil { c3 wu&*p{
public final static int INSERT = 1; tXp)o>"
public final static int BUBBLE = 2; 2XI%4
public final static int SELECTION = 3; [{zekF~)@
public final static int SHELL = 4; +6;OB@
public final static int QUICK = 5; w1KQ9H*
public final static int IMPROVED_QUICK = 6; r},|kb
public final static int MERGE = 7; &pmJ:WO,h
public final static int IMPROVED_MERGE = 8; hqBwA1](a
public final static int HEAP = 9; |RjjP 7
R 7{rY
public static void sort(int[] data) { }Ns_RS$
sort(data, IMPROVED_QUICK); sP+S86 u
} ' l!QGKz
private static String[] name={ lhjPS!A~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &c\8`# 6
}; T4f:0r;^f*
mWGT (`|~/
private static Sort[] impl=new Sort[]{ Awr]@%I
new InsertSort(), 5S7Z]DXiT8
new BubbleSort(), CY7REF
new SelectionSort(), v(t&8)Uu
new ShellSort(), | 'z)RFqj
new QuickSort(), m#SZI}
new ImprovedQuickSort(), :qT>m
new MergeSort(), my} P\r.
new ImprovedMergeSort(), 3(}?f
new HeapSort() A5/h*`Q\\
}; t)m4"p7
_rR.Y3N
public static String toString(int algorithm){ a%]p*X!
return name[algorithm-1]; 2xnOWW
} hT Xc0
~j4=PT
public static void sort(int[] data, int algorithm) { LSfj7j`
impl[algorithm-1].sort(data); (*;u{m=
} jG^~{7#
A9R}74e4g
public static interface Sort { 3n/L;T,X
public void sort(int[] data); Jg Xbs+.
} Zg'[.wov
2 43DdIG$
public static void swap(int[] data, int i, int j) { "*T)L<G
int temp = data; [cH/Y2[
data = data[j]; C4G)anT
data[j] = temp; '*-SvA\Cx
} I&vB\A
} ~kHir]jc