[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; <:">mV+/
} e!GZSk
int i1=l; K*1.'9/
int i2=mid+1; 6ZcXS
for(int cur=l;cur<=r;cur++){ oe9lF*$/
if(i1==mid+1) Hfh!l2P
data[cur]=temp[i2++]; fN@{y+6
else if(i2>r) [ 7g><
data[cur]=temp[i1++]; >%u@R3PH]
else if(temp[i1] data[cur]=temp[i1++]; AotCX7T2T
else 6#U^<`
data[cur]=temp[i2++]; /'ZKST4
} ZWS2q4/S
} 802H$P^ps
_g~2R#2Q
} :|rPT)yT]
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改进后的归并排序: cMaOM}mS
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package org.rut.util.algorithm.support; M*w'1fT
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import org.rut.util.algorithm.SortUtil; U6<M/>RG$
Huc|6~X
/** &kzj?xK=(j
* @author treeroot A (okv
* @since 2006-2-2 -\4zwIH
* @version 1.0 Br!9x{q*
*/ #Y2i*:<
public class ImprovedMergeSort implements SortUtil.Sort { H]&gW/=
Or8kp/d
private static final int THRESHOLD = 10; E$A3|rjnoN
22&;jpL'?
/* $5NKFJc
* (non-Javadoc) py @( <
* l(!/Q|Q|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <F(><Xw,-4
*/ ! \sMR
public void sort(int[] data) { wksl0:BL
int[] temp=new int[data.length]; ^`XCT
mergeSort(data,temp,0,data.length-1); 19W:-Om
} lq>AGw
-R b{^/
private void mergeSort(int[] data, int[] temp, int l, int r) { _[t8rl
int i, j, k; ?T!)X)A#
int mid = (l + r) / 2; "hQgLG
if (l == r) jo9gCP.
return; +.kfU)6@
if ((mid - l) >= THRESHOLD) aJzLrX
mergeSort(data, temp, l, mid); 3TS_-l
else XKS8K4"
insertSort(data, l, mid - l + 1); 2'] KTHm
if ((r - mid) > THRESHOLD) <CZgQ\Mt
mergeSort(data, temp, mid + 1, r); |gx~gG<
else u5+|Su
insertSort(data, mid + 1, r - mid); w!&~??&=}
QI_4*
for (i = l; i <= mid; i++) { iOCqE 5d3
temp = data; ]PR#W_&q
} vUesV%9hq
for (j = 1; j <= r - mid; j++) { _las;S'oa
temp[r - j + 1] = data[j + mid]; H43MoC
} }Wh6zT)
int a = temp[l]; ,R2U`EO;
int b = temp[r]; LT VF8-v
for (i = l, j = r, k = l; k <= r; k++) { b~w=v_[(I
if (a < b) { mbxbEqz
data[k] = temp[i++]; }D;WN@],
a = temp; (V?:]
} else { z~{&}Em ~
data[k] = temp[j--]; =Vw 5q},3
b = temp[j]; 69G`2_eKCp
} oD.r`]k
} `$TRleSi
} )Xtnk
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/** UbamB+QT
* @param data &JP-O60
* @param l 5Qh?>n>*
* @param i }`\/f
*/ eOI (6U!
private void insertSort(int[] data, int start, int len) { `5~3G2T
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); rsXq- Pq*
} p B;3bc
} 5d\q-d
} !?!C'-ps
} )B$;Vs]@i
= ieag7!
堆排序： >e,mg8u6$
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package org.rut.util.algorithm.support; &--ej|n
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import org.rut.util.algorithm.SortUtil; UVQ7L9%?f
cyM-)r@YQV
/** jMNU ?m:
* @author treeroot [7FItlF%I
* @since 2006-2-2 ._O
* @version 1.0 ACq7dLys,B
*/ L+}n@B
public class HeapSort implements SortUtil.Sort{ Iw<i@=V
tptN6Isuh
/* (non-Javadoc) ({WyDu&=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A:l@_*C..
*/ H<EQu|f&x
public void sort(int[] data) { k%]=!5F
MaxHeap h=new MaxHeap(); GL{57
h.init(data); 9ZXlR?GA
for(int i=0;i h.remove(); uocHa5J
System.arraycopy(h.queue,1,data,0,data.length); }a AH
} ig}A9j?]
NKb1LbnZ*y
private static class MaxHeap{ \*f;Xaa
e[_m<e
void init(int[] data){ qMt++*Ls
this.queue=new int[data.length+1]; R:Q0=PzDi#
for(int i=0;i queue[++size]=data; YH&bD16c3
fixUp(size); 9o*,P,j'}
} 6(d}W2GP
} ,Uhb
>9e(.6&2XZ
private int size=0; G6@M&u5RT
@f]{>OS
private int[] queue; A+J*e
_BdE< !r
public int get() { kHw_ S-
return queue[1]; Bw%Qbs0Q
} +5VLw
QTX8 L
public void remove() { yeDsJ/L
SortUtil.swap(queue,1,size--); LI2&&Mw
fixDown(1); JM1R ;i6
} D%6;^^WyUx
file://fixdown s*U1
private void fixDown(int k) { RNe^; B
int j; %rv7Jy
while ((j = k << 1) <= size) { BBev<
if (j < size %26amp;%26amp; queue[j] j++; }R{ts
if (queue[k]>queue[j]) file://不用交换 aJ>65RJ^=
break; S Em Q@1
SortUtil.swap(queue,j,k); h%uZYsK
k = j; ye,>A.
} ):[7E(F=
} :0Rx#%u}#
private void fixUp(int k) { uo@n(>}EL
while (k > 1) { GU( _
int j = k >> 1; md"!33 @
if (queue[j]>queue[k]) lIW }EM
break; Q|#W#LV,K
SortUtil.swap(queue,j,k); K/|Z$4S
k = j; ']2E {V
} e?8HgiP-
} 6G[4rD&
hHV";bk
} Z$/xy"
n(;|q&3
} \1^^\G>H5
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SortUtil： qVH1}9_
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package org.rut.util.algorithm; xc=b |:A
Uq^#riq
import org.rut.util.algorithm.support.BubbleSort; A#EDkU,
import org.rut.util.algorithm.support.HeapSort; W3MJr&p
import org.rut.util.algorithm.support.ImprovedMergeSort; JB<Sl4
import org.rut.util.algorithm.support.ImprovedQuickSort; (|klSz_4LM
import org.rut.util.algorithm.support.InsertSort; VY |_dk
import org.rut.util.algorithm.support.MergeSort; 1v.c 6~
import org.rut.util.algorithm.support.QuickSort; Ya3C#=
import org.rut.util.algorithm.support.SelectionSort; f4 P8Oz
import org.rut.util.algorithm.support.ShellSort; dfKF%27
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/** QdF5Cwf4
* @author treeroot "s0)rqf<
* @since 2006-2-2 4|riKo)
* @version 1.0 -GhP9; d
*/ J??-j
public class SortUtil { tn(JC%?^
public final static int INSERT = 1; }wr{W:j
public final static int BUBBLE = 2; a{^m-fSaR"
public final static int SELECTION = 3; <D<4BnZ(
public final static int SHELL = 4; m$}R%
public final static int QUICK = 5; 7}f}$1
public final static int IMPROVED_QUICK = 6; v$7QIl_/7
public final static int MERGE = 7; de.&`lPRf
public final static int IMPROVED_MERGE = 8; Ugu[|,
public final static int HEAP = 9; uki#/GzaO
$HHs^tW
public static void sort(int[] data) { %7zuQ \w
sort(data, IMPROVED_QUICK); O#:$^#j&
} Ktb\ bw
private static String[] name={ 5D\f8L
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Aw$x;3y
}; 60P#,o@G
|=Eo?Q_
private static Sort[] impl=new Sort[]{ (G zb
new InsertSort(), "6MVvpy"
new BubbleSort(), QdT}wkX
new SelectionSort(), z>58dA@f
new ShellSort(), N60rgSzI
new QuickSort(), @e(o129
new ImprovedQuickSort(), }Lc-7[/
new MergeSort(), nzd2zY>V
new ImprovedMergeSort(), Wk~WOzr}^
new HeapSort() 0h#lJS*
}; _ky,;9G]
5]KW^sL
public static String toString(int algorithm){ |^:cG4e
return name[algorithm-1]; B~]k#Ot)
} FQu8vwV6>
)Xk0VDNp$/
public static void sort(int[] data, int algorithm) { 7C,&*Ax,9
impl[algorithm-1].sort(data); O@u?h9?cf>
} Yw4n-0g
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public static interface Sort { t[ubn+
public void sort(int[] data); QS%%^+E2
} nygbt<;?
K&vF0*gN3
public static void swap(int[] data, int i, int j) { R<\F:9
int temp = data; RN$1bxY
data = data[j]; d/PiiiFf,
data[j] = temp; x'+T/zw
} |jI#"LbF
} 3LAIl913