[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; G]X72R?g
} EH<rUv63
int i1=l; ,E2Tw-%
int i2=mid+1; nm2bBX,fh
for(int cur=l;cur<=r;cur++){ ,r!_4|\
if(i1==mid+1) |pqc(B u
data[cur]=temp[i2++]; c,-3+b
else if(i2>r) }w^Hm3Y^&
data[cur]=temp[i1++]; ya8MjGo
else if(temp[i1] data[cur]=temp[i1++]; 8`l bKV
else (+lwt
data[cur]=temp[i2++]; -}Vnr\f
} 4/e|N#1`;[
} f-&4x_5
N# $ob9
} ;5QdT{$H
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改进后的归并排序: tjYqdbA)
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package org.rut.util.algorithm.support; w;+x g
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import org.rut.util.algorithm.SortUtil; VJquB8?H
?Co)7}N
/** [xW;5j<87
* @author treeroot 6z(7l
* @since 2006-2-2 %<c2jvn+k
* @version 1.0 ! f!/~M"!
*/ 2loy4f
public class ImprovedMergeSort implements SortUtil.Sort { otTv,T182
N 0<([B;
private static final int THRESHOLD = 10; +ZOjbI)
IqEE.XhaK
/* IkW8$>
* (non-Javadoc) = cQK^$6(
* &d}1)?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I_ O8 9Sgn
*/ U~h f,Oxi
public void sort(int[] data) { }XHB7,
int[] temp=new int[data.length]; V ,# |\
mergeSort(data,temp,0,data.length-1); *nZe|)m
} ?fv5KdD
7T7 A[A\
private void mergeSort(int[] data, int[] temp, int l, int r) { aYy+iP'$
int i, j, k; ldFK3+V
int mid = (l + r) / 2; zoh%^8?o
if (l == r) K9z 1'k QH
return; LsW7JIQd
if ((mid - l) >= THRESHOLD) $r3kAM;V:
mergeSort(data, temp, l, mid); (*6kYkUK
else `LroH>_
insertSort(data, l, mid - l + 1); MZ$x(Vcj
if ((r - mid) > THRESHOLD) R%%Uw %`
mergeSort(data, temp, mid + 1, r); D5Z@6RVt
else r^g"%nq9/
insertSort(data, mid + 1, r - mid); As}3VBd
Chso]N.1
for (i = l; i <= mid; i++) { r$Gz
temp = data; 3P, ul*e
} ^pc?oDPSg
for (j = 1; j <= r - mid; j++) { '?gF9:
temp[r - j + 1] = data[j + mid]; T<a/GE/
} U))2?#
int a = temp[l]; JKjVrx> @
int b = temp[r]; 2h;#BJ))
for (i = l, j = r, k = l; k <= r; k++) { #TUuk
if (a < b) { Ia@!Nr2
data[k] = temp[i++]; JLz.lk*.
a = temp; :q>uj5%
} else { 5+Ld1nom
data[k] = temp[j--]; evQk,;pIm
b = temp[j]; IE*5p6IM~
} bxc!x>)
} xo GX&^=
} NScUlR"nE
#TG7WF5
/** dq4t@:\o0
* @param data ^1\[hyZ!
* @param l -)pVgf
* @param i Ib}~Q@?2
*/ S-7ryHH*0
private void insertSort(int[] data, int start, int len) { c#L.I
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); sUl _W"aQ
} *eEn8rAr
} ba"_!D1
} :c3'U_H^
} ']^_W0?=
":vF[6K6
堆排序： 8h{;*Wr-
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package org.rut.util.algorithm.support; X B[C&3I
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import org.rut.util.algorithm.SortUtil; oFDJwOJ'Bj
xN>+!&3%w
/** dz"HO!9
* @author treeroot 5X}OUn8
* @since 2006-2-2 Q39;bz
* @version 1.0 zz[[9Am!
*/ mKZ^FgG
public class HeapSort implements SortUtil.Sort{ E[8i$
+]S!pyZ"
/* (non-Javadoc) 'U{6LSaCb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z*kZUx7I<
*/ an` GY&
public void sort(int[] data) { q@%9Y3
MaxHeap h=new MaxHeap(); nOdAp4{:q%
h.init(data); 9 Xx4,#?
for(int i=0;i h.remove(); 2\L}Ka|v
System.arraycopy(h.queue,1,data,0,data.length); E?^A+)<"
} ;h#nal>w@S
pNzpT!}H>
private static class MaxHeap{ ba"a!#wA
[.*o< KP
void init(int[] data){ 90]{4]y;
this.queue=new int[data.length+1]; 0ZpWfL
for(int i=0;i queue[++size]=data; VsR`y]"g
fixUp(size); cwKOE?!
} @V5'+^O
} !e(ZEV g
]J6+nA6)
private int size=0; "Qxn}$6-
5jBBk*/\
private int[] queue; ^><B5A>;
`@r#o&
public int get() { js8GK
return queue[1]; ?.&?4*u
} ^_^rI+cTX1
x1ID6kI[{*
public void remove() { X>6VucH{\
SortUtil.swap(queue,1,size--); 2\1\Jn#q
fixDown(1); )#n>))
} )QiHe}
file://fixdown mca9 +v
private void fixDown(int k) { ALY% h!L
int j; v__;oqN0
while ((j = k << 1) <= size) { rO`nS<G
if (j < size %26amp;%26amp; queue[j] j++; 3((53@s98
if (queue[k]>queue[j]) file://不用交换 DLrG-C33
break; 4D\+_Ic3
SortUtil.swap(queue,j,k); Pf]O'G&F
k = j; AFcA5:ja
} D3emO'`gQ
} ]\:FFg_O6t
private void fixUp(int k) { o ) FjWf;
while (k > 1) { !%2aw0Yv
int j = k >> 1; oFeflcSz
if (queue[j]>queue[k]) fKY1=3
break; "rA:;ntz
SortUtil.swap(queue,j,k); /@bLc1"
k = j; #2!M+S
} tK|hC[
} ;,h*s,i
|k4ZTr]?
} Ueyt}44.e2
aUy=D:\
} =`X;fz
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SortUtil： :6z0Ep"
VM3H&$d(h
package org.rut.util.algorithm; 7=ZB;(`L1
u0J+Nj9
import org.rut.util.algorithm.support.BubbleSort; `<>8tZS9"
import org.rut.util.algorithm.support.HeapSort; G\H@lFh
import org.rut.util.algorithm.support.ImprovedMergeSort; x./jTebeO
import org.rut.util.algorithm.support.ImprovedQuickSort; HC8{);
import org.rut.util.algorithm.support.InsertSort; '+X9MzU*\
import org.rut.util.algorithm.support.MergeSort; 9&W\BQ
import org.rut.util.algorithm.support.QuickSort; <][|,9mw
import org.rut.util.algorithm.support.SelectionSort; QLH s 3eM
import org.rut.util.algorithm.support.ShellSort; V]PTAhc
*qG=p`
/** rDYq]`
* @author treeroot C({L4O#?o
* @since 2006-2-2 xL>0&R
* @version 1.0 l{Hi5x'H
*/ ,oP-:q!PC
public class SortUtil { ;:9 x.IkxC
public final static int INSERT = 1; hpXu3o7e
public final static int BUBBLE = 2; n37( sKG
public final static int SELECTION = 3; zPV/{)S
public final static int SHELL = 4; $Y,]D*|"K
public final static int QUICK = 5; uB,B%XHj
public final static int IMPROVED_QUICK = 6; {djOU 9]
public final static int MERGE = 7; m ]K.0E
public final static int IMPROVED_MERGE = 8; 3Uag[ms
public final static int HEAP = 9; &,&+/Sr11
e`$v\7K
public static void sort(int[] data) { +nMgQOs
sort(data, IMPROVED_QUICK); V6$v@Zq
} rP`\<}a.
private static String[] name={ 59^@K"J
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" hkU# lt
}; FcW ?([l
S|]~,l2]}
private static Sort[] impl=new Sort[]{ ;5Sr<W\:;
new InsertSort(), Zc9 n0t[
new BubbleSort(), c= a+7>
new SelectionSort(), ^1cqx]>E
new ShellSort(), (tq)64XVz
new QuickSort(), ^m1Rw|
new ImprovedQuickSort(), *h =7:*n
new MergeSort(), 2CxdNj
new ImprovedMergeSort(), Ew;<iY[
new HeapSort() s\jLIrG8
}; >M1/m=a
<01B\t7
public static String toString(int algorithm){ OC>" +
return name[algorithm-1]; H1?1mH
} [U jbox
e8lF$[i
public static void sort(int[] data, int algorithm) { If&p$pAH?
impl[algorithm-1].sort(data); ADBw" ? >
} 9M7P]$^
_+;x4K;
public static interface Sort { QHM39Eu]
public void sort(int[] data); ,DE%p +q
} W.67, 0m$
16Xwtn72
public static void swap(int[] data, int i, int j) { O.$<Bf9
int temp = data; !J71[4t
data = data[j]; NFSPw`f
data[j] = temp; MYx*W7X
} *"4<&F S
} 9/%|#b-z