[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; 9rWLE6`
} *lY+Yy(
int i1=l; cqHw^{'8
int i2=mid+1; vK`S!7x'&
for(int cur=l;cur<=r;cur++){ C[W5d~@;E
if(i1==mid+1) &}|0CR.(
data[cur]=temp[i2++]; \y,;Cfl<
else if(i2>r) i/M+t~
data[cur]=temp[i1++]; "9u-lcQ\
else if(temp[i1] data[cur]=temp[i1++]; 67,3i~
else p1uN]T7>
data[cur]=temp[i2++]; gx#J%k,f
} :X|AW?*
} AYYRxhv_,
7ozYq_ $
} TwwIt5_fN
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改进后的归并排序: ]t7ClT)n!
w=gQ3j#s
package org.rut.util.algorithm.support; 1y(iE C
] :GfOgo
import org.rut.util.algorithm.SortUtil; 6e&g$R v
Rgs3A)[`d/
/** `-5cQ2>"
* @author treeroot s/\XH&KR3V
* @since 2006-2-2 ~"RQ!&U
* @version 1.0 ZG!x$yi$
*/ R$v i!0
public class ImprovedMergeSort implements SortUtil.Sort { _=)!xnYf
TLX^~W[gOm
private static final int THRESHOLD = 10; 7:ckq(89
v7g [Lk
/* I_K[!4~Kn
* (non-Javadoc) fyGCfM
* *;Ak5.du
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @],Z 2
*/ `2sdZ/fO
public void sort(int[] data) { .k p$oAL
int[] temp=new int[data.length]; jf2y0W>6s
mergeSort(data,temp,0,data.length-1); 8R BDJ
} enWF7`
kaV%0Of]
private void mergeSort(int[] data, int[] temp, int l, int r) { }t}38%1i
int i, j, k; MyK^i2eD
int mid = (l + r) / 2; -Zttj/K
if (l == r) G|<]Ma9x
return; |F3vRt@
if ((mid - l) >= THRESHOLD) ;;D% l^m+
mergeSort(data, temp, l, mid); |c]> Q
else 2c!h2$w
insertSort(data, l, mid - l + 1); f*UBigk
if ((r - mid) > THRESHOLD) S_`W@cp[
mergeSort(data, temp, mid + 1, r); 4b]IazL)
else 9F/|`
insertSort(data, mid + 1, r - mid); 1g+LF[*-~
(tgEa{rPAP
for (i = l; i <= mid; i++) { WvIK=fdZ$
temp = data; x0y%\
} cvn-*Sj
for (j = 1; j <= r - mid; j++) { (}VuiNY<3
temp[r - j + 1] = data[j + mid]; U[blq M
} @F>[DW]O
int a = temp[l]; nm<L&11
int b = temp[r]; p, !1 3X
for (i = l, j = r, k = l; k <= r; k++) { (Be$$W
if (a < b) { R %Rv
data[k] = temp[i++]; N=hSqw[
a = temp; 3`mC"ab /
} else { 3AX?B~s
data[k] = temp[j--]; N+ak[axN
b = temp[j]; $z~jnc
} M|$H+e }:
} Y}85J:q]
} W^-hMT]uD
hQ\#Fhu7
/** -Mit$mFn
* @param data 39'X$!
* @param l 7)g;Wd+H
* @param i Iwnj'R7:
*/ `#-p,NElV
private void insertSort(int[] data, int start, int len) { X%RQB$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); PEMxoe<+
} |p'_k(z}
} lqhHbB
} /<(R
} k9.u[y.
6nM rO$i0k
堆排序： l6r%nHP@
cL-6M^!a
package org.rut.util.algorithm.support; .N?|t$J
[YL sEo=
import org.rut.util.algorithm.SortUtil; WBIQ%XB'
(, ;MC/l
/** 8^&fZL',
* @author treeroot ! hOOpZf7
* @since 2006-2-2 @ J?-a m>
* @version 1.0 bEOOFs
*/ RlG'|xaT
public class HeapSort implements SortUtil.Sort{ |:`?A3^m#
bcGn8
/* (non-Javadoc) Y/QK+UMW*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Y- z~#;
*/ .H*? '*
public void sort(int[] data) { 4nX'a*'D~}
MaxHeap h=new MaxHeap(); A- <.#
h.init(data); WV9[DFU
for(int i=0;i h.remove(); t!+%g) @
System.arraycopy(h.queue,1,data,0,data.length); [ni-UNTv
} @y&h4^)z
q[T_*X3o
private static class MaxHeap{ EbHUGCMO
7`j|tb-
void init(int[] data){ O&gy(
this.queue=new int[data.length+1]; mP`,I"u
for(int i=0;i queue[++size]=data; #t5JUi%in*
fixUp(size); >d1aE)?
} {|t?
} /9t*CEu\
D*<8e?F
private int size=0; dja9XWOg
\!? PhNv
private int[] queue; dUBVp 9PB
z.Ve#~\
public int get() { q[We][Nrzb
return queue[1]; `UzCq06rJ1
} M[&.kH
{d{WMq$
public void remove() { kC,DW%Ls
SortUtil.swap(queue,1,size--); 1{Sx V
fixDown(1); d@`-!"
} g/J^K*3]
file://fixdown <3J=;.\6
private void fixDown(int k) { d-_93
int j; kG~ivB}x
while ((j = k << 1) <= size) { "X!_37kQ
if (j < size %26amp;%26amp; queue[j] j++; -&HoR!af
if (queue[k]>queue[j]) file://不用交换 "1pZzad
break; b W`)CWd
SortUtil.swap(queue,j,k); `rRg(fCN!M
k = j; _YD<Q@
} +eH=;8
} (\AszLW
private void fixUp(int k) { iIC9rso"Q1
while (k > 1) { 9h)P8B.>M
int j = k >> 1; ).@)t:uNa
if (queue[j]>queue[k]) !*$'fn'bAA
break; |x}&wFV
SortUtil.swap(queue,j,k); )gm\e?^
k = j; \t7zMp
} +q>C}9s3
} & t@
rUJSzLy
} ! a8h
Av[|.~g
} LOYyj?^7
!'UsC6Y4
SortUtil： Iclan\q#y
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package org.rut.util.algorithm; .Jnp{Tet
\&|w;
import org.rut.util.algorithm.support.BubbleSort; vb4G_X0S
import org.rut.util.algorithm.support.HeapSort; }9fV[zO
import org.rut.util.algorithm.support.ImprovedMergeSort; 4pOc`
import org.rut.util.algorithm.support.ImprovedQuickSort; M KE[Yb?
import org.rut.util.algorithm.support.InsertSort; <=LsloI
import org.rut.util.algorithm.support.MergeSort; 8~XI7g'5x
import org.rut.util.algorithm.support.QuickSort; {pi67"mYp
import org.rut.util.algorithm.support.SelectionSort; B3i=pcef
import org.rut.util.algorithm.support.ShellSort; [Nzg 8FP
K<fq=:I3
/** ^9m^#"ZW`
* @author treeroot [pyXX>:M
* @since 2006-2-2 j4hUPL7
* @version 1.0 ,_7tRkn
*/ r+WPQ`Ar
public class SortUtil { [zO(V`S2
public final static int INSERT = 1; <\#
public final static int BUBBLE = 2; e?'k[ES^
public final static int SELECTION = 3; .LVOaxT
public final static int SHELL = 4; '$&(+>)z`
public final static int QUICK = 5; h;h,dx
public final static int IMPROVED_QUICK = 6; iH -x
public final static int MERGE = 7; Q(eQZx{
public final static int IMPROVED_MERGE = 8; 5;uX"zG
public final static int HEAP = 9; ^[,1+WS%
E`LIENm
public static void sort(int[] data) { GA*Khqdid
sort(data, IMPROVED_QUICK); & ;x1Rx
} &|,qsDK(
private static String[] name={ OEqe^``!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 97@?QI}
}; QSQ\@h;E
k>@^M]%
private static Sort[] impl=new Sort[]{ MyS7AL
new InsertSort(), 'c\TMb.
new BubbleSort(), b|C,b"$N0
new SelectionSort(), XdXS^QA.s
new ShellSort(), ^i,0n}>
new QuickSort(), H@bmLq
new ImprovedQuickSort(), 7'l{I'Z
new MergeSort(), x#xO {
new ImprovedMergeSort(), ?p\II7
new HeapSort() _|V+["IS
}; V,%5 hl'&
%)@(Tye -
public static String toString(int algorithm){ 29E@e]Y,`
return name[algorithm-1]; o\Vt $
} p[+me o
LFry?HO,D
public static void sort(int[] data, int algorithm) { Rhxm)5+
impl[algorithm-1].sort(data); YSUH*i/%
} pzp"NKxi
J##X5'a3*
public static interface Sort { 'S-"*:$,u
public void sort(int[] data); %b'VEd7
} x@(f^P
pt;Sk?-1
public static void swap(int[] data, int i, int j) { Gb)iB
int temp = data; Ud?d.
data = data[j]; mI*>7?
data[j] = temp; )ejqE6'[
} r}M4()9L
} 9'r3L)[