[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; %m/W4Nk
} }R&5Ye
int i1=l; t GS>f>i
int i2=mid+1; t/$:g9V%FA
for(int cur=l;cur<=r;cur++){ s2Rg-:7
if(i1==mid+1) 2K:Rrn/cR
data[cur]=temp[i2++]; !=)b2}e/>
else if(i2>r) 6Mc&gnN
data[cur]=temp[i1++]; r+RFDg/
else if(temp[i1] data[cur]=temp[i1++]; KT3n-Y-,
else QH5[}zs8
data[cur]=temp[i2++]; b}APD))*H!
} HpKF7oJ'N
} 7jS`4,
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} faIHmU
/ biB*Z
改进后的归并排序: N+N98~Y`P
F[@M?
package org.rut.util.algorithm.support; )lhPl
#@UzOQ>
import org.rut.util.algorithm.SortUtil; ^{}$o#iof
XM#xxf* Y
/** fW3awR{
* @author treeroot e+~Q58oD
* @since 2006-2-2 L,\wB7t
* @version 1.0 b[/uSwvi
*/ dje}CbZ
public class ImprovedMergeSort implements SortUtil.Sort { \+#>XDD
(5/>arDn
private static final int THRESHOLD = 10; fbrCl!%P
`b:yW.#w3l
/* Z#vU~1W
* (non-Javadoc) "3;b,<0
* 'eYM;\%('
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bXNM.K
*/ #S|DoeFs
public void sort(int[] data) { 6%A_PP3Z
int[] temp=new int[data.length]; X,mqQ7+
mergeSort(data,temp,0,data.length-1); 4:0y\M5u
} Vh}F#~BrI
dX;Q\ ]"
private void mergeSort(int[] data, int[] temp, int l, int r) { 7=@3cw H
int i, j, k; Ri<'apl
int mid = (l + r) / 2; eEmuE H@X
if (l == r) 'DdR2
return; WV&grG|
if ((mid - l) >= THRESHOLD) V48o+O
mergeSort(data, temp, l, mid); ))xP]Muv
else Dt~ |)L+
insertSort(data, l, mid - l + 1); FzzV%
if ((r - mid) > THRESHOLD) gp(: o$
mergeSort(data, temp, mid + 1, r); f&2f8@
else /H'F4->
insertSort(data, mid + 1, r - mid); [bh8Nj\E
/^\UB fE
for (i = l; i <= mid; i++) { U9t-(`[j?
temp = data; I&JjyR
} &UxI62[k
for (j = 1; j <= r - mid; j++) { mmvo >F"
temp[r - j + 1] = data[j + mid]; ,!>1A;~wT
} cCBYM
int a = temp[l]; G$oi>zt3
int b = temp[r]; mx=2lL`
for (i = l, j = r, k = l; k <= r; k++) { xgq `l#
if (a < b) { n6C]JWG\/U
data[k] = temp[i++]; _%gu<Ys
a = temp; EQ%,IK/
} else { De`p@`+<#~
data[k] = temp[j--]; 5H79-QLd
b = temp[j]; z@Uf@~+U
} 5Z_7Sc
} yKB&][)&
} lO/?e!$
]t)#,'$^[W
/** `|`Qrv4}
* @param data ,a'Y^[4k?
* @param l J^gElp
* @param i L/KiE+Y
*/ |PxTm
private void insertSort(int[] data, int start, int len) { fq<JX5DER
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); s ;2ih)[
} BI|YaZa+p
} :lE_hY
} $I|6v
} r7Zx<c
(RU\a]Ry
堆排序： fP8iz `n
z,K;GZuP
package org.rut.util.algorithm.support; =berCV
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import org.rut.util.algorithm.SortUtil; M]7>Ar'zsG
%U?1Gf e
/** 3R& FzLs
* @author treeroot []l2 `fS#
* @since 2006-2-2 .C\##
* @version 1.0 cH48)
*/ $_f"NE}
public class HeapSort implements SortUtil.Sort{ NbPNcjPL
jz$ ]"\G#
/* (non-Javadoc) e1/{bX5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) AU4K$hC^
*/ t.pn07$
public void sort(int[] data) { z(eAhK}6?
MaxHeap h=new MaxHeap(); T)o>U&KNP
h.init(data); f)19sjAJk
for(int i=0;i h.remove(); ~A@HW!*Z@
System.arraycopy(h.queue,1,data,0,data.length); lPZYd8
} +x]3 -s
H;c3 x"
private static class MaxHeap{ vf;&0j&`
bae\EaS ?
void init(int[] data){ v}sk %f
this.queue=new int[data.length+1]; svvl`|n%
for(int i=0;i queue[++size]=data; M2!2J
fixUp(size); i`^[_
} YR-Ge
} >/.w80<'
#?C.%kD
private int size=0; 2y5d
de_%#k1:L
private int[] queue; O)$Pvll
tA8O(9OV
public int get() { Xe2Zf
return queue[1]; )skz_a}]8
} BcxALRWE
b'%)?{E
public void remove() { I7XJPc4}
SortUtil.swap(queue,1,size--); ?egZkg=U
fixDown(1); Q N]y.(S)y
} "'74GY8,
file://fixdown '!<gPAVTzV
private void fixDown(int k) { jSMxba]
int j; 8(>2+#exw
while ((j = k << 1) <= size) { 2 9#jKh
if (j < size %26amp;%26amp; queue[j] j++; N?2C*|%f
if (queue[k]>queue[j]) file://不用交换 u';9zk/$
break; T#GTNk!v
SortUtil.swap(queue,j,k); u*$]Bx
k = j; =K<`nF0w
} F%IvgXt5
} fj97_Q=
private void fixUp(int k) { 1) Nj.#)
while (k > 1) { #QNa| f#=
int j = k >> 1; y.$Ae1a=
if (queue[j]>queue[k]) hQ (84u
break; t76B0L{
SortUtil.swap(queue,j,k); ^X;p8uBo
k = j; 6aKfcvf &
} nc^DFP
} +_1sFH`
weH3\@
} hgK 4;R
=Q*x=}NH
} s#H_QOE
N6HeZB":
SortUtil： qLV3Y?S!L
VWK%6Ye0
package org.rut.util.algorithm; $wC'qV *
FfNUFx2N
import org.rut.util.algorithm.support.BubbleSort; &%`WXe-`R
import org.rut.util.algorithm.support.HeapSort; X?U'GLm
import org.rut.util.algorithm.support.ImprovedMergeSort; H[RX~Xk2E
import org.rut.util.algorithm.support.ImprovedQuickSort; 8n35lI( [
import org.rut.util.algorithm.support.InsertSort; C6'K)P[p
import org.rut.util.algorithm.support.MergeSort; e'MW"uCP}
import org.rut.util.algorithm.support.QuickSort; o Vpq*"
import org.rut.util.algorithm.support.SelectionSort; qTSe_Re
import org.rut.util.algorithm.support.ShellSort; m/3,;P.6
#$ 4g&8
/** `|2g&Vn
* @author treeroot 14DhJUV"b
* @since 2006-2-2 c~+KrWbZ~
* @version 1.0 )=VAEQhL-
*/ L'w]O -86
public class SortUtil { 1Qw_P('}
public final static int INSERT = 1; 55FRPNx-x
public final static int BUBBLE = 2; @'<=EAXe
public final static int SELECTION = 3; qrf90F)
public final static int SHELL = 4; szCB}WY
public final static int QUICK = 5; dNf:I,<DCf
public final static int IMPROVED_QUICK = 6; )|/%]@` N
public final static int MERGE = 7; g`C\pdX"B
public final static int IMPROVED_MERGE = 8; <eZ*LK?
public final static int HEAP = 9; [HI$[:[
U!(es0rX
public static void sort(int[] data) { qOy0QZ#0
sort(data, IMPROVED_QUICK); U;j\FE^+>
} ~+C)0Yn
private static String[] name={ XZ@|(_Z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 'Y.6sB
}; m(D+!I9
Y]tbwOle
private static Sort[] impl=new Sort[]{ 1|m%xX,[
new InsertSort(), pp{2[>
new BubbleSort(), 3l"8_zLP
new SelectionSort(), ;W]9DBAB
new ShellSort(), 3W%j^nM
new QuickSort(), s(KSN/
new ImprovedQuickSort(), bz}-[W+
new MergeSort(), "8R &c}
new ImprovedMergeSort(), !hFhw1
new HeapSort() 4xH/a1&p=
}; FA+"t^q
rsq?4+\
public static String toString(int algorithm){ ac\([F-
return name[algorithm-1]; Gt+rVJ=v
} 53 -Owjpx
)KEW`BC5T
public static void sort(int[] data, int algorithm) { H'JU5nE
impl[algorithm-1].sort(data); PW82 Vp.
} P)cEYk
!6x7^E;c
public static interface Sort { CW2)1%1iz
public void sort(int[] data); =t`cHs29
} }*C*!?pcd
3I(;c ,S
public static void swap(int[] data, int i, int j) { [2Zl '+
int temp = data; skBD2V4
data = data[j]; oEX^U4/=
data[j] = temp; 91]sO%3
} k<5g
} >ZW|wpO