[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; `om+p?j
} B+j]C$8}
int i1=l; <ZF|2
int i2=mid+1; r~lZ8$KC
for(int cur=l;cur<=r;cur++){ . \"k49M`
if(i1==mid+1) 0{|HRiQH9+
data[cur]=temp[i2++]; R<Lf>p>_
else if(i2>r) `daqzn
data[cur]=temp[i1++]; wOl?(w=|
else if(temp[i1] data[cur]=temp[i1++]; WXl+w7jr
else ksOGCd^G7
data[cur]=temp[i2++]; 6JDHwV
} RhH1nf2UR
} o)/Pr7Qn
4=xi)qF/@
} kkF)Tro\
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改进后的归并排序: La;GS
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package org.rut.util.algorithm.support; 6:]N%
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import org.rut.util.algorithm.SortUtil; zKO7`.*
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/** kg[%Q]]
* @author treeroot rP3HR5
* @since 2006-2-2 &0Yg:{k$
* @version 1.0 UJ)pae
*/ 2gPqB*H
public class ImprovedMergeSort implements SortUtil.Sort { d]pb1ECuu
'7-Yo Q
private static final int THRESHOLD = 10; En?V\|,
//U1mDFT
/* z%%O-1
* (non-Javadoc) !hBpon
* jO-?t9^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bf"'xn9
*/ i#]e&Bru5
public void sort(int[] data) { GQqGrUQ*}
int[] temp=new int[data.length]; 6lSz/V;
mergeSort(data,temp,0,data.length-1); CWn\KR
} sUZA!sv
GiV%Hcx
private void mergeSort(int[] data, int[] temp, int l, int r) { zTF{ g+
int i, j, k; O?JJE8~']
int mid = (l + r) / 2; =|S%Rzsk
if (l == r) 3/kT'r
return; }}JMwT
if ((mid - l) >= THRESHOLD) 8Xotly
mergeSort(data, temp, l, mid); QF#w$%7
else 3@>F-N
insertSort(data, l, mid - l + 1); `6D?te
if ((r - mid) > THRESHOLD) vk& gR
mergeSort(data, temp, mid + 1, r); {LO Pm1K8Y
else r9i?H
insertSort(data, mid + 1, r - mid); %lF*g
H5=kDkb
for (i = l; i <= mid; i++) { 5i!Q55Yv=,
temp = data; "is(
} )/H;5 cn
for (j = 1; j <= r - mid; j++) { >='/%Ad
temp[r - j + 1] = data[j + mid]; $YL9 vJV
} Gk,Bx1y
int a = temp[l]; E.oJ[;
int b = temp[r]; GXtMX ha,
for (i = l, j = r, k = l; k <= r; k++) { jFj11w1FrA
if (a < b) { K4c:k; V
data[k] = temp[i++]; Jz}nV1G(jz
a = temp; #DTKz]i?
} else { rs&]46i/p
data[k] = temp[j--]; *@2Bh4
b = temp[j]; VY0.]t
} n~N>;mP
} tIsWPt]Y
} Zd*$^P,|
};/QK*
/** Z2%HQL2
* @param data L"bOc'GfQ
* @param l liKlc]oM
* @param i eUyF<j
*/ rFRcK>X\L
private void insertSort(int[] data, int start, int len) { Kc MzY
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9u B?-.
} :!`"GaTy
} Da=EAG-{7
} Mt[yY|Ec|
} QU"WpkO
kRp]2^}\s\
堆排序： 22`^Rsb,6L
k ut=(;
package org.rut.util.algorithm.support; ZZw`8 E
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import org.rut.util.algorithm.SortUtil; {Su?*M2y
i"2OsGT
/** e7vm3<m4
* @author treeroot ejROJXB
* @since 2006-2-2 D*XrK0#Z`
* @version 1.0 QQ*sjK.(
*/ J1?;'
public class HeapSort implements SortUtil.Sort{ Dp@XAyiA[
~ZHjP_5Q
/* (non-Javadoc) PobX;Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gq+SM i=
*/ vl"w,@V7
public void sort(int[] data) { g9_zkGc7
MaxHeap h=new MaxHeap(); F^i3e31*t
h.init(data); .Ro/ioq
for(int i=0;i h.remove(); LD$5KaOW
System.arraycopy(h.queue,1,data,0,data.length); Z*,e<zNQ
} ,T/Gv;wa2
D -}>28
private static class MaxHeap{ ~f/|bcep
<Vat@e
void init(int[] data){ Wh[QR-7Ew
this.queue=new int[data.length+1]; `zd,^.i5~
for(int i=0;i queue[++size]=data; vCzZjGBY
fixUp(size); *FS8]!Qg
} KII{GDR]
} a:kAo0@":j
D31X {dJ
private int size=0; %()d$.F
%go2tv:|W
private int[] queue; 7#V7D6j1
MqyjTY::Xg
public int get() { %pC<T*f
return queue[1]; *}?[tR5
} j6 wFks
x.SfB[SZ
public void remove() { i'>6Qo
SortUtil.swap(queue,1,size--); vgfC{]v<W]
fixDown(1); ^_7|b[Bt
} oV|O`n
file://fixdown ({f}Z-%
private void fixDown(int k) { !`69.v
int j; 9:j?Jvw$
while ((j = k << 1) <= size) { Z%t_1t
if (j < size %26amp;%26amp; queue[j] j++; 6FUW^dt
if (queue[k]>queue[j]) file://不用交换 YEL0h0gn
break; 2M %j-yG"
SortUtil.swap(queue,j,k); W5*ldXXk
k = j; 5{c;I<0
} @CprC]X
} aukcO;oG<
private void fixUp(int k) { tpfgUZ{
while (k > 1) { Z}W{ iD{
int j = k >> 1; --yF%tRMP
if (queue[j]>queue[k]) h\s/rZg=r
break; ]l,BUf-O
SortUtil.swap(queue,j,k); vygzL U^
k = j; ' \JE>#
} ]#tB[G
} !3Q0Ahf
~#_~DqbMZ5
} :@A&HkF
Y },E3<
} ~Y 6'sM|
O<u=Vz3c~0
SortUtil： >O'\ jp}$l
_~kw^!p>Kr
package org.rut.util.algorithm; 'Wlbh:=$
Nx}nOm
import org.rut.util.algorithm.support.BubbleSort; *PJH&g#Ge
import org.rut.util.algorithm.support.HeapSort; ZU4=&K
import org.rut.util.algorithm.support.ImprovedMergeSort; bA;OphO(
import org.rut.util.algorithm.support.ImprovedQuickSort; a:FU- ^B4~
import org.rut.util.algorithm.support.InsertSort; O-?rFNavxp
import org.rut.util.algorithm.support.MergeSort; bI):-2&s}
import org.rut.util.algorithm.support.QuickSort; qmS9*me {
import org.rut.util.algorithm.support.SelectionSort; i:lc]B
import org.rut.util.algorithm.support.ShellSort; 0PzSp ]
qu=~\t1[6
/** $?= $F
* @author treeroot ^q7V%{54
* @since 2006-2-2 727#7Bo
* @version 1.0 S%SYvA
*/ &@~K8*tmK
public class SortUtil { -amo8V;2H
public final static int INSERT = 1; ^y<^hKjV
public final static int BUBBLE = 2; ,d"T2Hy
public final static int SELECTION = 3; &<&tdShI
public final static int SHELL = 4; jqUVERbc
public final static int QUICK = 5; #s)f3HU>
public final static int IMPROVED_QUICK = 6; o9kJ90{D=
public final static int MERGE = 7; ,K5K?C$k
public final static int IMPROVED_MERGE = 8; _4{0He`q
public final static int HEAP = 9; 73Dxf -
5100fX}
public static void sort(int[] data) { {K^5q{u
sort(data, IMPROVED_QUICK); bz*@[NQ
} \GFqRRn
private static String[] name={ U2Ve @.
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Vt`4u5HG
}; }%g[1 #%(
#S>N}<>
private static Sort[] impl=new Sort[]{ lhUGo =
new InsertSort(), ]_KWN$pd
new BubbleSort(), _i=*0Q
new SelectionSort(), inu.U[.
new ShellSort(), RdCGK?s
new QuickSort(), aDS:82GMQ
new ImprovedQuickSort(), lrrTeE*
new MergeSort(), l@`k:?
new ImprovedMergeSort(), di\.*7l?
new HeapSort() }7PJr/IuF
}; 5'!fi]Z
1+%UZK= K
public static String toString(int algorithm){ D*l(p5[
return name[algorithm-1]; y?sz&*:
} ZCCCuB
\XDiw~0
public static void sort(int[] data, int algorithm) { \f,<\mJ#
impl[algorithm-1].sort(data); }8'_M/u\
} kQ\GVI11?
]TvMT
public static interface Sort { j.M]F/j
public void sort(int[] data); 757&bH|a
} l)r\SE1
y-pdAkDh
public static void swap(int[] data, int i, int j) { |nMjv]#
int temp = data; }Qo]~/
data = data[j]; ,xwiJfG; ]
data[j] = temp; #X(2
} 1P)K@j
} pH~\~