[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; a7%5Qg9B;
} nP0|nPWz#
int i1=l; O<Ht-TN&
int i2=mid+1; c,!Ijn\;(
for(int cur=l;cur<=r;cur++){ )f*&}SV
if(i1==mid+1) $*H_0wQc
data[cur]=temp[i2++]; pLDseEr<
else if(i2>r) {"Van,w
data[cur]=temp[i1++]; QyJ}zwD
else if(temp[i1] data[cur]=temp[i1++]; ucL}fnY1
else .,o=#
data[cur]=temp[i2++]; J5*krH2i
} pzg|?U
} sn@gchO9s
r[q-O&2&
} QPg QM6
O:{I9V-=>s
改进后的归并排序: k_ UY^vz.
Ra%RcUf~sh
package org.rut.util.algorithm.support; 8l~]}2LAs
ltwX-
import org.rut.util.algorithm.SortUtil; aiF7\^aw$
-ce N}Cb3
/** .Quu_S_vH
* @author treeroot g`d5OHvOo
* @since 2006-2-2 ; "ux{ .
* @version 1.0 =;l.<{<VH
*/ /[q6"R!uMz
public class ImprovedMergeSort implements SortUtil.Sort { mHM38T9C%
=$X5O&E3'
private static final int THRESHOLD = 10; Oq7M1|{
"n^h'// mn
/* WJ<nc+/v:
* (non-Javadoc) _<6 ^r
* |cEJRs@B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3%bCv_6B
*/ yAy~|1}
public void sort(int[] data) { |F=!0Id<
int[] temp=new int[data.length]; 9E'fM
mergeSort(data,temp,0,data.length-1); (+`pEDD{X
} ` .|JTm[
|L}zB,
private void mergeSort(int[] data, int[] temp, int l, int r) { ~Z9Eb|B
int i, j, k; VUpa^R
int mid = (l + r) / 2; .vE=527g)
if (l == r) Hbu8gqu
return; 4nK\gXz19
if ((mid - l) >= THRESHOLD) 5%BexIk
mergeSort(data, temp, l, mid); Ls< ";QJc
else J -tOO
insertSort(data, l, mid - l + 1); #tg,%*.s
if ((r - mid) > THRESHOLD) UCG8=+t5T
mergeSort(data, temp, mid + 1, r); VT8PV5z
else gqV66xmJ3
insertSort(data, mid + 1, r - mid); B>Tfyo
-sO[,
for (i = l; i <= mid; i++) { ZG[P?fM
temp = data; "O{j}QwY
} t5t,(^;f
for (j = 1; j <= r - mid; j++) { $mdmuUIy-3
temp[r - j + 1] = data[j + mid]; TRP#b 7nC
} +`tl<rg;
int a = temp[l]; %J(y2 }
int b = temp[r]; .1n=&d|
for (i = l, j = r, k = l; k <= r; k++) { 8XJg
if (a < b) { '!eg9}<
data[k] = temp[i++]; B7PkCS&X
a = temp; =1Nz* c
} else { aF*KY<w
data[k] = temp[j--]; sB!#`kh
b = temp[j]; o>WB,i^G
} <Qg).n>;z
} 8(-V pU
} ffoL]u\
<A|X4;
/** YnM&t ;TX
* @param data w-iu/|}
* @param l < z':_,
* @param i V"Cx5#\7C
*/ O[}{$NXw
private void insertSort(int[] data, int start, int len) { zs/4tNXw
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `+DH@ce
} h?_Cv*0q
} `HVS}}{a
} J]&^A$
} :j(e+A1@
R[_Q}W'HG
堆排序： (~>uFH
=MR.*m{
package org.rut.util.algorithm.support; MoAie|MKe
jr/
import org.rut.util.algorithm.SortUtil; #(@!:f1
z$g cK>@l
/** !8g419Yg
* @author treeroot ?^Gi;d5
* @since 2006-2-2 rU6F$I=
* @version 1.0 C@x\ZG5rA
*/ gB7kb$J
public class HeapSort implements SortUtil.Sort{ jej.!f:H
~[8n+p+&X
/* (non-Javadoc) rR Kbs@1M
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CzMCd ~*7R
*/ 0gRj3al(
public void sort(int[] data) { 8Z&M}Llk
MaxHeap h=new MaxHeap(); mJxr"cwHl
h.init(data); ak,KHA6u
for(int i=0;i h.remove(); Borr
System.arraycopy(h.queue,1,data,0,data.length); TWzlF>4N
} J`6IH#54
_+!@c6k)ra
private static class MaxHeap{ ./]xn
gB _/(
void init(int[] data){ n?KhBJx 4
this.queue=new int[data.length+1]; epicY
for(int i=0;i queue[++size]=data; Cn"_x
fixUp(size); 1Kjqs)p^
} (rmOv\hG9V
} }VU^ 8D
C/$bgK[ev
private int size=0; s5bqS'%
3_bE12
private int[] queue; ZLjEH7
awXK9}.
public int get() { +3yG8
return queue[1]; L@5sY0 M
} }SfS\b{|~
W [*Go
public void remove() { c,2OICj
SortUtil.swap(queue,1,size--); OV G|WC
fixDown(1); 4s s 4O
} {MRXKnm;e
file://fixdown zRU9Q2Y
private void fixDown(int k) { ^h$^j
int j; !>:SPt l
while ((j = k << 1) <= size) { <x8I<K
if (j < size %26amp;%26amp; queue[j] j++; X-=4Z9
if (queue[k]>queue[j]) file://不用交换 3F?7oMNIh
break; z!M #
SortUtil.swap(queue,j,k); I4|LD/b
k = j; jn 5v
} aD(3.=[R
} KuRJo]
private void fixUp(int k) { /78zs-
while (k > 1) { &6^ --cc
int j = k >> 1; oVTXn=cYDp
if (queue[j]>queue[k]) E^iShe
break; C'y4 ~7
SortUtil.swap(queue,j,k); J$W4AT
k = j; T@Bu Fr`]<
} _Sg"|g
} gSa!zQN6
{/FdrS
} >\!G43Q=
/Rf,Rjs
} (@1>G ^%
CnpQdI
SortUtil： fsl ZJE
%[4u #G`
package org.rut.util.algorithm; >akC
ur:8`+" (
import org.rut.util.algorithm.support.BubbleSort; _l"=#i@L
import org.rut.util.algorithm.support.HeapSort; vM@8&,;
import org.rut.util.algorithm.support.ImprovedMergeSort; vX7U|zy
import org.rut.util.algorithm.support.ImprovedQuickSort; ;reBJk
import org.rut.util.algorithm.support.InsertSort; J-|&[-Z
import org.rut.util.algorithm.support.MergeSort; 4@+']vN4
import org.rut.util.algorithm.support.QuickSort; }S$OE))u
import org.rut.util.algorithm.support.SelectionSort; YV8PybThc
import org.rut.util.algorithm.support.ShellSort; 3ey.r%n
cL<,]%SkE
/** X }`o9]y
* @author treeroot xnC:?d
* @since 2006-2-2 @Di!~e6
* @version 1.0 AdpJ4}|0
*/ V'tqsKQ!
public class SortUtil { ~ulcLvm:i
public final static int INSERT = 1; 67;6nXG0K
public final static int BUBBLE = 2; l^XOW- ;u
public final static int SELECTION = 3; No8-Hm
public final static int SHELL = 4; ,(RpBTV
public final static int QUICK = 5; (wFoI}s
public final static int IMPROVED_QUICK = 6; 27+~!R~Yw
public final static int MERGE = 7; P5H_iH
public final static int IMPROVED_MERGE = 8; ]h#QA;
public final static int HEAP = 9; T, +=ka$
&1f3e
public static void sort(int[] data) { aNn4j_V(
sort(data, IMPROVED_QUICK); UGlHe7
} 76o3Sge:
private static String[] name={ 7|o!v);uR
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" k*u6'IKi.4
}; ~F53{qxV
l}iQ0v@
private static Sort[] impl=new Sort[]{ 3GNcnb
new InsertSort(), 2cO6'?b
new BubbleSort(), 1S(n3(KRk$
new SelectionSort(), H+562W
new ShellSort(), #sg*GK+|:R
new QuickSort(), Yi]`"\
new ImprovedQuickSort(), .hM t:BMf*
new MergeSort(), E]v]fy"
new ImprovedMergeSort(), /N({"G'
new HeapSort() ySB0"bl
}; c^O&A\+;
@eZBwFe
public static String toString(int algorithm){ qX`Hi9ja
return name[algorithm-1]; Y]=k"]:%
} aM xd"cTzx
UdVf/PGx
public static void sort(int[] data, int algorithm) { [!>9K}z,=
impl[algorithm-1].sort(data); f~*7hv\
} `dD_"Hdt
-uu&{$
public static interface Sort { FW5v 1s=
public void sort(int[] data); W"*2,R[}%
} H2oxD$s
!-N!Bt8;
public static void swap(int[] data, int i, int j) { qe'ssX;
int temp = data; &]Uo>Gb3!q
data = data[j]; MD*dq
data[j] = temp; m?; ?I]`
} >&Oql9_
} eM 5#L,Y{