[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; kX "*kD
} ?~=5x
int i1=l; HC(7,3
int i2=mid+1; u5rHQA0%
for(int cur=l;cur<=r;cur++){ YlJ_$Q[
if(i1==mid+1) ZIs=%6""&
data[cur]=temp[i2++]; Apbgm[m|{
else if(i2>r) kj/v$m
data[cur]=temp[i1++]; >bbvQb+j
else if(temp[i1] data[cur]=temp[i1++]; iCNJ%AZH
else I~)A!vp
data[cur]=temp[i2++]; nl+8C}=u
} ,KFF[z
} fX{Xw0
f?W"^6Df
} 5KC Zg'h
*_H^]wNJG
改进后的归并排序: aK?PK }@
ykD-L^}
package org.rut.util.algorithm.support; 4`'V%)M
0P^&{ek+)
import org.rut.util.algorithm.SortUtil; Qv;q*4_
X1FKcWv
/** wuKr9W9Xa
* @author treeroot > K s.
* @since 2006-2-2 tNC;CP#R+
* @version 1.0 ^7iP!-w/
*/ bBgyLyg
public class ImprovedMergeSort implements SortUtil.Sort { oz&RNB.K
4b 1a?
private static final int THRESHOLD = 10; wOn*QO[
}dpE>
/* Z}yd`7
* (non-Javadoc) 1BOv|xPjZ
* EFzPt?l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8)XAdAr
*/ 6ac_AsFK
public void sort(int[] data) { {ug*
int[] temp=new int[data.length]; Q3rLCg,;
mergeSort(data,temp,0,data.length-1); @j'GcN vs
} c_Jcy
()(^B}VK
private void mergeSort(int[] data, int[] temp, int l, int r) { 0 LQ%tn
int i, j, k; CS\8ej}y
int mid = (l + r) / 2; L|Bjw3K&D
if (l == r) ",P?jgs^g5
return; H?wf%0
if ((mid - l) >= THRESHOLD) f[Xsri
mergeSort(data, temp, l, mid); :uB(PeAv*
else Nn-EtM0w
insertSort(data, l, mid - l + 1); DA^!aJ6iF
if ((r - mid) > THRESHOLD) :Ny^-4-N
mergeSort(data, temp, mid + 1, r); f6`W(OiE
else m;{(U Z
insertSort(data, mid + 1, r - mid); #Q$e%VJ(c1
L3Ivm:
for (i = l; i <= mid; i++) { vY);7
temp = data; pMV?vH
} ih(Al<IS
for (j = 1; j <= r - mid; j++) { +c' n,O~3
temp[r - j + 1] = data[j + mid]; !112u#V
} I|. <
int a = temp[l]; Xh@;4n
int b = temp[r]; IubzHf
for (i = l, j = r, k = l; k <= r; k++) { b]g#mQ
if (a < b) { ccwz:7r
data[k] = temp[i++]; g4&f2D5
a = temp; FXh*!%"*
} else { 8f>v[SQ"
data[k] = temp[j--]; iM M s3
b = temp[j]; ?\_vqW
} lY[\eQ 1:
} Qb8Z+7
} o]@'R<F(u
?G 'sb}.
/** K&BaGrR
* @param data ?^WX]SAl
* @param l 5V8`-yO9
* @param i cp2a @
*/ *0x!C8*`Xe
private void insertSort(int[] data, int start, int len) { =55V<VI
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 2hY"bpGW
} d#|%h] 6
} qAi:F=> X
} 4"#F=f0
} z?WkHQ9
\|6Q]3l
堆排序： K6stkDhb
8^!ib/@v"
package org.rut.util.algorithm.support; 1pP q)}=+
!*PX-
import org.rut.util.algorithm.SortUtil; N5mhs#
>OKc\m2%Q
/** @./@"mR<
* @author treeroot L'O=;C"f
* @since 2006-2-2 eN0lJ~
* @version 1.0 DaqlL
*/ 6W9lKD_i
public class HeapSort implements SortUtil.Sort{ /$^SiE+N
]l^"A~va
/* (non-Javadoc) zqxN/H]z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <SiJA`(7
*/ Lw`}o`D
public void sort(int[] data) { *1h@Jb34
MaxHeap h=new MaxHeap(); 'j;i4ie>*x
h.init(data); \_MWZRMc5
for(int i=0;i h.remove(); n^` `)"
System.arraycopy(h.queue,1,data,0,data.length); #rQT)n
} ,qj M1xkL$
T;v^BVn
private static class MaxHeap{ nPhREn!
{7.uwIW.1
void init(int[] data){ c=aVYQ"2
this.queue=new int[data.length+1]; ,.AXQ#~&`
for(int i=0;i queue[++size]=data; ,15$$3z/E
fixUp(size); zS'{F>w
} .&.L@CRH
} ;iz3Bf1o
zC`ediyu
private int size=0; ]F #0to
'![VA8
private int[] queue; G0(A~Q"
4%7Oaf>9
public int get() { 0yxwsBLy
return queue[1]; @B9#Hrc
} w:2yFC
M $zt;7P|
public void remove() { O@>{%u
SortUtil.swap(queue,1,size--); at(gem
fixDown(1); ([]\7}+8
} gB0Q0d3\G,
file://fixdown M7ug< 8i
private void fixDown(int k) { [ZD`t,x(
int j; X/H2c"!t
while ((j = k << 1) <= size) { )2J#pz?.
if (j < size %26amp;%26amp; queue[j] j++; zLg_0r*h1
if (queue[k]>queue[j]) file://不用交换 pIY3ft\
break; ceAefKdb
SortUtil.swap(queue,j,k); Ryn@">sVI
k = j; u?KG%
} +f,I$&d.V
} tDtqTB}
private void fixUp(int k) { Qm4cuV-0{
while (k > 1) { 5Zl7crA[
int j = k >> 1; }DQ[C&
if (queue[j]>queue[k]) J7k=5Fqej;
break; zwK$ q=-:
SortUtil.swap(queue,j,k); W3&~[DS@~
k = j; Ox6^=D"
} TSj)XU {W
} aZCxyoh+
D!D}mPi[
} 1~[GGl
be'&tsZ9
} $it>*%
gXB&Sgjo
SortUtil： Y{L|ja%9?
jR{t=da
package org.rut.util.algorithm; iBCIJ!;
V,eH E5C
import org.rut.util.algorithm.support.BubbleSort; e)oi3d.wJf
import org.rut.util.algorithm.support.HeapSort; Hr/J6kyB)
import org.rut.util.algorithm.support.ImprovedMergeSort; Z$S0X$q}
import org.rut.util.algorithm.support.ImprovedQuickSort; B|SX?X
import org.rut.util.algorithm.support.InsertSort; E#n:d9WA:
import org.rut.util.algorithm.support.MergeSort; f0g&=k{OD
import org.rut.util.algorithm.support.QuickSort; \8`^QgV`@
import org.rut.util.algorithm.support.SelectionSort; kp*BAQ
import org.rut.util.algorithm.support.ShellSort; H}lbF0`
+'UxO'v3]
/** t_Ul;HVPS
* @author treeroot +Q!Kj7EU/
* @since 2006-2-2 (ewcj\l4*
* @version 1.0 IXsOTBM
*/ /_r{7Gq.
public class SortUtil { a2H_8iQ!
public final static int INSERT = 1; Q]-r'pYr
public final static int BUBBLE = 2; )==Qo/N:
public final static int SELECTION = 3; s_76)7
public final static int SHELL = 4; I2C1mV
public final static int QUICK = 5; 5S4`.'
public final static int IMPROVED_QUICK = 6; >|JMvbje
public final static int MERGE = 7; sE0,b
public final static int IMPROVED_MERGE = 8; O9Yk5b;
public final static int HEAP = 9; ? \NT'CG
E9j(%kQ2
public static void sort(int[] data) { j{P3o<l&`
sort(data, IMPROVED_QUICK); 0vM,2:kf*
} ;+Mr|vweTC
private static String[] name={ DkBVk+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" e3kdIOu5
}; IE&G7\>(yO
[q!)Y:|u_>
private static Sort[] impl=new Sort[]{ IF3V5Q
new InsertSort(), _x?S0R1
new BubbleSort(), m\ /V0V\
new SelectionSort(), 7s1LK/R|u
new ShellSort(), NjSjE_S2B8
new QuickSort(), Fprhu;h
new ImprovedQuickSort(), 6 i]B8Ziq{
new MergeSort(), #^q@ra
new ImprovedMergeSort(), %$F\o1S
new HeapSort() sUsIu,1Q
}; V_pKe~
5@~5RNrq2
public static String toString(int algorithm){ dH0wVI<z
return name[algorithm-1]; RTTEAh:.
} .?.Q[ic
@fSqGsSk
public static void sort(int[] data, int algorithm) { ,YmTx
impl[algorithm-1].sort(data); )X-TJ+d
} k!m9 l1x
vC5y]1QDd
public static interface Sort { eh$T 3_#q
public void sort(int[] data); q.PXO3T
} 8 9f{8B]z
mKBPIQ+ZS
public static void swap(int[] data, int i, int j) { 1PT0<C-
int temp = data; kam\dn04
data = data[j]; !,PoH
data[j] = temp; a5%IjgQ&z
} T8a!"lPP7
} gnU##Km|