[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; (Pw,3CbJ
} )dEcKH<#
int i1=l; Otq1CD9
int i2=mid+1; @W @,8e]c
for(int cur=l;cur<=r;cur++){ v3t<rv
if(i1==mid+1) KU0Ad);e
data[cur]=temp[i2++]; q(hBqUW
else if(i2>r) T \- x3i
data[cur]=temp[i1++]; \dE{[^.5
else if(temp[i1] data[cur]=temp[i1++]; OK`^DIr5l
else (f_J @n
data[cur]=temp[i2++]; T<Qa`|5>
} &?5)Jis:
} B~qo^ppVU
i!3*)-a\~`
} \ISg6v{/
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改进后的归并排序: T;{:a-8
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package org.rut.util.algorithm.support; EL z5P}L6
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import org.rut.util.algorithm.SortUtil; 4@<wN \'
+|pYu<OY
/** gae=+@z
* @author treeroot 5T(cy
* @since 2006-2-2 7,Z<PE
* @version 1.0 gV\Y>y4v
*/ ZfVY:U:o>
public class ImprovedMergeSort implements SortUtil.Sort { EK0~3HSZ
V\r{6-%XiW
private static final int THRESHOLD = 10; _:5t~29
8)pL0bg
/* W7_m,{q
* (non-Javadoc) VnB HQ.C
* OQ 4h8,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $XMpC{
*/ l=Pw yJ
public void sort(int[] data) { Pw7uxN`
int[] temp=new int[data.length]; P,WQN[(+
mergeSort(data,temp,0,data.length-1); }opMf6`w
} 1|H4]!7kE
UhkL=+PD
private void mergeSort(int[] data, int[] temp, int l, int r) { @H+L1H%9n
int i, j, k; kdV9F
int mid = (l + r) / 2; ME]89 T&
if (l == r) 98?O[=
return; =ePX^J*M'
if ((mid - l) >= THRESHOLD) 8+".r2*_iO
mergeSort(data, temp, l, mid); fB,eeT1v?h
else $ywROa]
insertSort(data, l, mid - l + 1); 9b,0_IMHH
if ((r - mid) > THRESHOLD) J:ka@2>|
mergeSort(data, temp, mid + 1, r); |r)QkxdU,
else V,'_BUl+x
insertSort(data, mid + 1, r - mid); _j0xL{&&
rbIYLVA+V
for (i = l; i <= mid; i++) { afD {w*[8
temp = data; p>3QW3<
} a;-%C{S9r
for (j = 1; j <= r - mid; j++) { % a.T@E
temp[r - j + 1] = data[j + mid]; :?FHqfN?_
} EfpMzD7/(
int a = temp[l]; uWFyI"
int b = temp[r]; ;PU'"MeB "
for (i = l, j = r, k = l; k <= r; k++) { _FcTY5."S
if (a < b) { UHU ,zgM
data[k] = temp[i++]; xaoR\H
a = temp; (&r` l&0
} else { [UC_
data[k] = temp[j--]; W(4$.uZ)
b = temp[j]; g.%} +5
} s3Zt)xQ3
} v#<{Y'K
} xVX:kDX
x{K"z4xbI
/** 7l=Tl[n
* @param data Vky]In=
* @param l VmQ'
* @param i mEi(DW)(
*/ Qy[S~D_
private void insertSort(int[] data, int start, int len) { =&9c5"V&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |pG0 .p4
} BOcD?rrZ0
} p9u'nDi
} R4JfH
} ElDeXLr'
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堆排序： U:3OE97
33D2^Sf6"
package org.rut.util.algorithm.support; =mPe wx'
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import org.rut.util.algorithm.SortUtil; wF%RM$
rKFnivGT
/** $M!iQ"bb
* @author treeroot w4}Q6_0v
* @since 2006-2-2 K{`R`SXD
* @version 1.0 lA1
*/ w3sU& |N
public class HeapSort implements SortUtil.Sort{ _O'!C!K6
5~jz| T}s
/* (non-Javadoc) U] GD6q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4pQf*l8e
*/ j|&D(]W/
public void sort(int[] data) { zy"k b
MaxHeap h=new MaxHeap(); L]!![v.VY
h.init(data); #ley3rJW]
for(int i=0;i h.remove(); !!V1#?0jw
System.arraycopy(h.queue,1,data,0,data.length); Ev7v,7`z
} (jj`}Qe3U
<Z.{q Zd
private static class MaxHeap{ !QbuOvw
]d7A|)q
void init(int[] data){ C,$o+q*)W9
this.queue=new int[data.length+1]; w%iwxo
for(int i=0;i queue[++size]=data; ){'<67dK
fixUp(size); /d:hW4}<}.
} Y_jc*S
} D|m3.si
/VufL+q1
private int size=0; *>mjUT}cP
"-X8
private int[] queue; s2|.LmC3|B
S1Od&v[R
public int get() { /^k%sG@?
return queue[1]; A/UOcl+N
} dhnX\/
!y/e Fx
public void remove() { vazA@|^8
SortUtil.swap(queue,1,size--); Y`eF9Im,
fixDown(1); "!AtS
} =SeQ- H#
file://fixdown !o?&{"#+
private void fixDown(int k) { jIrfJ*z
int j; $':5uU1}
while ((j = k << 1) <= size) { T|D^kL%m!
if (j < size %26amp;%26amp; queue[j] j++; jN*wbqL
if (queue[k]>queue[j]) file://不用交换 {J,"iJKop
break; ^0}wmxDq
SortUtil.swap(queue,j,k); js Z"T
k = j; RN[x\",
} lMu-,Z="
} ,tg]Gt
private void fixUp(int k) { !9KDdU
while (k > 1) { W#NZnxOX"
int j = k >> 1; \#Jq%nd
if (queue[j]>queue[k]) -=gI_wLbM
break; ]a&riPh"
SortUtil.swap(queue,j,k); }[UH1+`L
k = j; pL;e(lM
} ~?fl8RF\
} MD<x{7O12>
nw`rH*
} YsVKdh
e Ru5/y~
} HK<S|6B7V
u pUJF`3
SortUtil： 26k~Z}
\$DBtq5=
package org.rut.util.algorithm; [f lK
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import org.rut.util.algorithm.support.BubbleSort; KGo^>us
import org.rut.util.algorithm.support.HeapSort; 8,[ *BgeX
import org.rut.util.algorithm.support.ImprovedMergeSort; .JB1#&B+
import org.rut.util.algorithm.support.ImprovedQuickSort; F*Hovxez
import org.rut.util.algorithm.support.InsertSort; [hg9 0Q6
import org.rut.util.algorithm.support.MergeSort; Kg>B$fBx)
import org.rut.util.algorithm.support.QuickSort; YlG#sBzl
import org.rut.util.algorithm.support.SelectionSort; L xIKH G
import org.rut.util.algorithm.support.ShellSort; ^w``(-[*
>#;;g2UV
/** WTl0}wi
* @author treeroot O{\<Izm`D
* @since 2006-2-2 VBDb K|
* @version 1.0 MmvOyKNZF
*/ $^^M&[b-
public class SortUtil { ',WJ'g
public final static int INSERT = 1; c U(z5th
public final static int BUBBLE = 2; HDzeotD
public final static int SELECTION = 3; @}!?}QU
public final static int SHELL = 4; uaKbqX
public final static int QUICK = 5; V(0Y
public final static int IMPROVED_QUICK = 6; SIR2 Kc0
public final static int MERGE = 7; ~p n$'1Q
public final static int IMPROVED_MERGE = 8; MoEh25U.
public final static int HEAP = 9; Hmhsb2`\
Viw,YkC
public static void sort(int[] data) { Ps\4k#aOv
sort(data, IMPROVED_QUICK); R_GA`U\ {
} -X%twy=
private static String[] name={ U"Bge\6x=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <zvtQ^{]
}; _4SZ9yu
# .(f7~
private static Sort[] impl=new Sort[]{ u^E0u^
new InsertSort(), ELMz~vp
new BubbleSort(), A&v Qtd
new SelectionSort(), 9IG<9uj
new ShellSort(), (0LA.aBIf
new QuickSort(), 'sa)_?Hy
new ImprovedQuickSort(), #Y-_kQV*
new MergeSort(), *)^ZUk
new ImprovedMergeSort(), d$+0;D4E
new HeapSort() *9=}f;~
}; (yd(ZY
@zi0:3`#0\
public static String toString(int algorithm){ pG)dF@
return name[algorithm-1]; l,b,U/3R.
} o(l%k},a
)AdwA+-x
public static void sort(int[] data, int algorithm) { UCj+V@{
impl[algorithm-1].sort(data); sIaehe'B
} >Sk%78={R
d`$w3Hy
public static interface Sort { +cmi?~KS*
public void sort(int[] data); <GQ=PrT|/
} WpE"A
Xf7]+
public static void swap(int[] data, int i, int j) { 30Qp:_D
int temp = data; $qg2@X.
data = data[j]; .:Wp9M
data[j] = temp; `<<9A\Y-f
} >>C S8
} zlQBBm;fE