[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; #O2wyG)oU
} vU=9ydAj?
int i1=l; "$XYIuT
int i2=mid+1; :83,[;GO2
for(int cur=l;cur<=r;cur++){ FJP< bREQ
if(i1==mid+1) ^4c,U9J=
data[cur]=temp[i2++]; 0U$:>bQ
else if(i2>r) e^j<jV`1
data[cur]=temp[i1++]; c_ La^HS
else if(temp[i1] data[cur]=temp[i1++]; r55qmPhg
else z;i4N3-:
data[cur]=temp[i2++]; &&[zT/]P
} >Bc>IO
} "(s6aqO$
K&=D-50%
} PJzc=XPU
^_v[QV
改进后的归并排序: '.?^uM
b2N6L2~V
package org.rut.util.algorithm.support; 6X/wdk
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import org.rut.util.algorithm.SortUtil; 5L8&/EN9-
^:`oP"%-T
/** ~12_D'8D[
* @author treeroot "`pNH'
* @since 2006-2-2 S]}}A
* @version 1.0 n.*3,4.]
*/ PU W[e%
public class ImprovedMergeSort implements SortUtil.Sort { U^MuZ
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private static final int THRESHOLD = 10; v=!YfAn
tR kF
/* (a[.vw^g
* (non-Javadoc) &5?G-mn
* PgMbMH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z~,mRgc$B
*/ |6aJwe+*
public void sort(int[] data) { tQWWgLM
int[] temp=new int[data.length]; oL]mjo=jN
mergeSort(data,temp,0,data.length-1); [F+(^- (
} *h$&0w y
?WQNIX4
private void mergeSort(int[] data, int[] temp, int l, int r) { OTj,O77k
int i, j, k; ._?V%/
int mid = (l + r) / 2; %SAw;ZtQ:
if (l == r) `OqM8U @
return; ;j{7!GeKa
if ((mid - l) >= THRESHOLD) lwc5S`"
mergeSort(data, temp, l, mid); we3tx{j
else C5|db{=\.*
insertSort(data, l, mid - l + 1); <47k@Ym
if ((r - mid) > THRESHOLD) 7h%4]
mergeSort(data, temp, mid + 1, r); *m9{V8Yi2
else LN4qYp6)G
insertSort(data, mid + 1, r - mid); 4S|=/f
H3, ut
for (i = l; i <= mid; i++) { 8-m 3e
temp = data; K/txD20 O|
} LXj5R99S
for (j = 1; j <= r - mid; j++) { 8$0\J_
temp[r - j + 1] = data[j + mid]; wJe?t$ac?
} %%%S"$t
int a = temp[l]; gY(1,+0-
int b = temp[r]; `0{ S3v
for (i = l, j = r, k = l; k <= r; k++) { 5,1{Tv`
if (a < b) { U&UKUACn"
data[k] = temp[i++]; 44\cI]!{
a = temp; /`[!_4i
} else { LvcuZZ`1a
data[k] = temp[j--]; UZGDdP
b = temp[j]; +`B'r '
} 3uV4/%U
} w7FoL
} oKA&An
X8i(~ B
/** 5+- I5HX|~
* @param data hN3u@P^
* @param l y7:tr
* @param i \=;uu_v$
*/ Ye5jB2Z
private void insertSort(int[] data, int start, int len) { wG1l+^p
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Ts9ktPlm
} +H_MV=A^
} TW7:q83{l
} Z o=]dBp.
} >xqM5#m`E$
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堆排序： c0_E_~
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package org.rut.util.algorithm.support; e$e#NoN
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import org.rut.util.algorithm.SortUtil; ['q&@_d7
c3)C{9T](
/** e)H!uR
* @author treeroot -)jax
* @since 2006-2-2 c>HK9z{
* @version 1.0 \,&9
*/ @?kM'*mrZM
public class HeapSort implements SortUtil.Sort{ oH#v6{y
Pm+tQ
/* (non-Javadoc) kM/Te{<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) EpYy3^5d
*/ UG;Y^?Ppe5
public void sort(int[] data) { x;LzG t:w
MaxHeap h=new MaxHeap(); JWv{=_2w
h.init(data); !TKkec8$
for(int i=0;i h.remove(); 52d^K0STC
System.arraycopy(h.queue,1,data,0,data.length); C[uOReo
} kW@,$_cK
w%y\dIeI'
private static class MaxHeap{ ?F7o!B
C/=XuKE-t
void init(int[] data){ +GF#?X0^
this.queue=new int[data.length+1]; O(z}H}Fv
for(int i=0;i queue[++size]=data; cXnKCzSxZq
fixUp(size); -|S]oJy
} HYK!}&
} ]Mi.f3QlO6
h3* x[W
private int size=0; \4d.sy0&>-
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private int[] queue; l;A,0,i
p\p\q(S">
public int get() { l?8M p$M
return queue[1]; 5J2=`=FK
} 1ocJ+
G:W>I=^DaR
public void remove() { 'heJ"k?
SortUtil.swap(queue,1,size--); `J0i.0p
fixDown(1); ^|!I+
} c{+AJ8
file://fixdown }8-\A7T
private void fixDown(int k) { ZR0r>@M3v<
int j; nH|,T%
while ((j = k << 1) <= size) { @}-r&/#
if (j < size %26amp;%26amp; queue[j] j++; ->^~KVh&
if (queue[k]>queue[j]) file://不用交换 N|g;W
break; )~J>X{hy
SortUtil.swap(queue,j,k); !7bw5H
k = j; ~EzaC?fQ
} GoM ip8'u
} !y:%0{l
private void fixUp(int k) { @|}BXQNd
while (k > 1) { +|iYg/2
int j = k >> 1; AK!hK>u`
if (queue[j]>queue[k]) }n_p$g[Nj/
break; ;Q;[*B=kE
SortUtil.swap(queue,j,k); l_tw<`Ep
k = j; }[+!$#
} lv&mp0V+
} +=q)
~[WF_NU1y
} b2,mCfLsv
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} ^ KK_qC
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SortUtil： TjMe?p
h%; e0Xz|
package org.rut.util.algorithm; X?:o;wB
IP`6bMd
import org.rut.util.algorithm.support.BubbleSort; =J-5.0Q\_\
import org.rut.util.algorithm.support.HeapSort; ]uj=:@
import org.rut.util.algorithm.support.ImprovedMergeSort; ._w8J"E5
import org.rut.util.algorithm.support.ImprovedQuickSort; :<Y}l-x
import org.rut.util.algorithm.support.InsertSort; >_dx_<75&
import org.rut.util.algorithm.support.MergeSort; "xmP6=1
import org.rut.util.algorithm.support.QuickSort; M->*{D@a
import org.rut.util.algorithm.support.SelectionSort; VV4Gjc
import org.rut.util.algorithm.support.ShellSort; %3q0(Xl
im} ?rY
/** :A %^^F%
* @author treeroot 5!YA o\S
* @since 2006-2-2 %J:SO_6
* @version 1.0 bzDIhnw
*/ 8P7"&VYc8
public class SortUtil { ml0.$z
public final static int INSERT = 1; vK7\JZ>
public final static int BUBBLE = 2; *-W#G}O0
public final static int SELECTION = 3; T{qTj6I
public final static int SHELL = 4; H1GRMDNXOA
public final static int QUICK = 5; Jj~EiA
public final static int IMPROVED_QUICK = 6; }G o$ \Bk
public final static int MERGE = 7; vb 1@yQ
public final static int IMPROVED_MERGE = 8; Z=B_Ty
public final static int HEAP = 9; FGO[ |]7IN
l0&EZN0V2
public static void sort(int[] data) { KrVcwAcq|1
sort(data, IMPROVED_QUICK); ^-mRP\5
} S##1GOO
private static String[] name={ \^(0B8|w
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >Rvx[`|O!m
}; [ EFMu;q
[,n c
private static Sort[] impl=new Sort[]{ 2%*MW"Q
new InsertSort(), ] Z8Vj7~
new BubbleSort(), b2 _Yu^
new SelectionSort(), t?o,RN:
new ShellSort(), b|Q)[y]
new QuickSort(), QB.J,o*XD4
new ImprovedQuickSort(), CQel3Jtt.
new MergeSort(), du$|lxC
new ImprovedMergeSort(), W$U0[^1
new HeapSort() O#wpbrJ
}; ,B4VT 96*
6sIL.S~c)
public static String toString(int algorithm){ PB%-9C0
return name[algorithm-1]; L %ip>
} M8H5K
+^*iZ6{+7
public static void sort(int[] data, int algorithm) { PJxH7|GSi
impl[algorithm-1].sort(data); '(? uPr
} Hf'G8vW
D7Y)?Z5A;
public static interface Sort { ?USQlnr:R/
public void sort(int[] data); m9U"[Huv1E
} x21dku<6K[
p!]6ll^
public static void swap(int[] data, int i, int j) { ~~/xRs
int temp = data; ^c~)/F/cF
data = data[j]; LjL[V'JL
data[j] = temp; f.24:Dw,
} ~GE$myUT\p
} =@TQ>Qw%b