[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; _J
} X\$|oiR
int i1=l; [ne4lWaE<y
int i2=mid+1; -.g5|B
for(int cur=l;cur<=r;cur++){ d2.eDEOsC
if(i1==mid+1) f]5bAs
data[cur]=temp[i2++]; ET_}x7
else if(i2>r) `"(7)T{
data[cur]=temp[i1++]; fXIeCn
else if(temp[i1] data[cur]=temp[i1++]; >6ch[W5k@
else $F G4wA
data[cur]=temp[i2++]; &.<{c `-
} :!tQqy2
} 5qG7LO.
X/i8$yqv
} :n'QNGj
|ki#MtCp
改进后的归并排序: gNLjk4H,S[
X^9_'T9
package org.rut.util.algorithm.support; pPh_p@3I
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import org.rut.util.algorithm.SortUtil; 66)@4 3V
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/** F6Q#{Ufq
* @author treeroot giaO7Qh~
* @since 2006-2-2 HE+VanY![
* @version 1.0 c!Pi)
*/ p$[*GXR4
public class ImprovedMergeSort implements SortUtil.Sort { 6/@ cP/
+-ieaF
private static final int THRESHOLD = 10; [(ty{
Di-"y,[
/* 8CA4gnh
* (non-Javadoc) #wM0p:<
* .D4D!!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $!obpZ~}
*/ v l{hE~
public void sort(int[] data) { o{UwUMw5`
int[] temp=new int[data.length]; 3O#7OL68v
mergeSort(data,temp,0,data.length-1); [mWo&Ph[-
} tMyD^jVC
Jz%&-e3
private void mergeSort(int[] data, int[] temp, int l, int r) { [.<vISRir
int i, j, k; zy$hDy0
int mid = (l + r) / 2; \3)%p('
if (l == r) A%+~
return; >t*zY~R.
if ((mid - l) >= THRESHOLD) 7qW:^2y
mergeSort(data, temp, l, mid); Sk;IAp#X9
else msY"Y*4
insertSort(data, l, mid - l + 1); Vaq=f/
if ((r - mid) > THRESHOLD) C(,s_Ks
mergeSort(data, temp, mid + 1, r); um3 M4>K
else o"n^zG
insertSort(data, mid + 1, r - mid); 8`u#tl(
_/E>38G]
for (i = l; i <= mid; i++) { N.-Ryj&9
temp = data; $AsM 9D<BE
} 3\D jV2t
for (j = 1; j <= r - mid; j++) { #v(+3Hp
temp[r - j + 1] = data[j + mid]; _|tg#i|Om
} '{:(4>&
int a = temp[l]; `/+7@~[RU
int b = temp[r]; mH8s'F
for (i = l, j = r, k = l; k <= r; k++) { &|{K*pNa
if (a < b) { 6f1;4Jfp
data[k] = temp[i++]; *ZaK+ B
a = temp; g_n=vO('X
} else { OvK_CN{
data[k] = temp[j--]; C|!E'8Rw
b = temp[j]; >Q+EqT
} |qbJ]v!
} MQG$J!N
} *Z/B\nb
" *Ni/p$I
/** 9m6w.:S
* @param data /pb7
* @param l #Wc)wL-Tg
* @param i bJBx~
*/ 3`e1:`Hu
private void insertSort(int[] data, int start, int len) { IRS^F;)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }qlz^s
} =e._b 7P
} R [uo:.
} |}mBW@ah
} A>k+4|f
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堆排序： K}Z'!+<U
E-"Jgq\aC
package org.rut.util.algorithm.support; MESQAsx%
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import org.rut.util.algorithm.SortUtil; a[#4Oq/t$
f%@Y XGf
/** t"BpaA^gO
* @author treeroot ekAGzu
* @since 2006-2-2 RNt3az
* @version 1.0 "+XO[WGc
*/ +ubO-A?
public class HeapSort implements SortUtil.Sort{ *i$+i
Wq>j;\3b3
/* (non-Javadoc) mU\$piei
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r%B5@+{so
*/ xMuy[)b
public void sort(int[] data) { ]}5jX^j
MaxHeap h=new MaxHeap(); }'X}!_9w>
h.init(data); `$#64UZ>U1
for(int i=0;i h.remove(); -#Wc@\;
System.arraycopy(h.queue,1,data,0,data.length); K1+,y1c
} m=}kGzIY4
=8J\;h
private static class MaxHeap{ +b{h*WWdj
94lmsE
void init(int[] data){ L$ ON=$q5
this.queue=new int[data.length+1]; Nvew^c)x
for(int i=0;i queue[++size]=data; 6U""TR!
fixUp(size); qBwqxxTc
} \+>b W(
} T[;{AXLeI
$==hr^H
private int size=0; hi ]+D= S
MBwp{ET!p
private int[] queue; .g|pgFM?
om/gk4S2
public int get() { $8eq&_gJ
return queue[1]; [Q$"+@jw
} -pjL7/gx
tx.YW9xD
public void remove() { ER|5_
SortUtil.swap(queue,1,size--); *yX_dgC>[
fixDown(1); $jntT(V
} ,Y5+UzE@
file://fixdown )1i)I?m
private void fixDown(int k) { O'mX7rY<<(
int j; lq9c2xK
while ((j = k << 1) <= size) { (>Yii_Cd
if (j < size %26amp;%26amp; queue[j] j++; B}!n6j`
if (queue[k]>queue[j]) file://不用交换 97&6iTYA
break; |LjCtm)@+
SortUtil.swap(queue,j,k); ca`=dwe>
k = j; --/ .
} P]x@h
} O;zW'*c+
private void fixUp(int k) { T-x`ut7c
while (k > 1) { qxrOfsh
int j = k >> 1; P$oa6`%l
if (queue[j]>queue[k]) ]O\6.>H
break; L_A|
SortUtil.swap(queue,j,k); TfxKvol'
k = j; 3)eeUO+
} 6Q>w\@lF
} oJR!0nQ
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} ~/Ry=8
+tA rH C]
} 9wwvh'T&NK
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SortUtil： ~KNxAxyVi
3&zmy'b*:
package org.rut.util.algorithm; f2Slsl;
C[Fh^
import org.rut.util.algorithm.support.BubbleSort; zZ wD)p?_g
import org.rut.util.algorithm.support.HeapSort; CkflEmfe
import org.rut.util.algorithm.support.ImprovedMergeSort; m7@`POI
import org.rut.util.algorithm.support.ImprovedQuickSort; kOc'@;_O
import org.rut.util.algorithm.support.InsertSort; A} "*`y
import org.rut.util.algorithm.support.MergeSort; <37vWK1+
import org.rut.util.algorithm.support.QuickSort; kjmF-\
import org.rut.util.algorithm.support.SelectionSort; q'@UZ$2
import org.rut.util.algorithm.support.ShellSort; 9o18VJR
lg=[cC2
/** vSyN_AB?$
* @author treeroot $C>EnNx
* @since 2006-2-2 K~E]Fkw!;
* @version 1.0 Ue\&
*/ 2V0R|YUt
public class SortUtil { f[v??^
public final static int INSERT = 1; jc?Hip'
public final static int BUBBLE = 2; 4 I~,B[|
public final static int SELECTION = 3; f9rToH
public final static int SHELL = 4; ywdNwNJ
public final static int QUICK = 5; Y#m0/1-
public final static int IMPROVED_QUICK = 6; KOxD%bX_
public final static int MERGE = 7; FStfGN
public final static int IMPROVED_MERGE = 8; +Q '|->#
public final static int HEAP = 9; L%<1C\k
i a|F
public static void sort(int[] data) { urN&."c
sort(data, IMPROVED_QUICK); 2<O hO ^
} ?+!KucTF
private static String[] name={ `#UTOYx4
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" N,O[pTwj
}; [J];
vxm`[s|QC
private static Sort[] impl=new Sort[]{ Du{]r[[C
new InsertSort(), N;w1f"V}
new BubbleSort(), 8sIGJ|ku
new SelectionSort(), Gmwn:
new ShellSort(), 3! +5MsR+
new QuickSort(), _Nj;Ni2rD
new ImprovedQuickSort(), 2#&K3v
new MergeSort(), " c]Mz&z
new ImprovedMergeSort(), 7}#vANm
new HeapSort() r`krv-,O$
}; {P]l{W@li
olJ9Kfc0
public static String toString(int algorithm){ $W2g2[+
return name[algorithm-1]; (&B & V
} b)V[d8IA
Gq{v)iN
public static void sort(int[] data, int algorithm) { s810714
impl[algorithm-1].sort(data); *= D$
} IKU-
dV5$L e#y
public static interface Sort { /yOd]N;$
public void sort(int[] data); Soa.thP
} -py.YZ
toCN{[
public static void swap(int[] data, int i, int j) { +]__zm/^
int temp = data; ecFI"g
data = data[j]; o0/03O
data[j] = temp; Qh*|mW
} 15zL,yo
} mrJQB I+