[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; "1\RdTw
} /-cX(z 7
int i1=l; t2U]CI%
int i2=mid+1; %E=,H?9&>
for(int cur=l;cur<=r;cur++){ +b:h5,
if(i1==mid+1) pNk,jeo
data[cur]=temp[i2++]; ce-m)o/
else if(i2>r) !3gpiQH{
data[cur]=temp[i1++]; iKCTYXN1(
else if(temp[i1] data[cur]=temp[i1++]; wLg:YM"
else c"_H%x<[
data[cur]=temp[i2++]; h3vm<R;
} 3]5&&=#
} cUX]tiC0
HEW9YC"
} \1c`)
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改进后的归并排序: _*-'yu8#
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package org.rut.util.algorithm.support; 1+y6W1m^R
~P.-3
import org.rut.util.algorithm.SortUtil; ]f+D& qZ B
88X*:Kf?:
/** D=Yag!1
* @author treeroot LxYM"_1A;
* @since 2006-2-2 DdA}A>47
* @version 1.0 q=L* 99S
*/ T[2f6[#[_
public class ImprovedMergeSort implements SortUtil.Sort { B3k],k
`qy6qKl N
private static final int THRESHOLD = 10; `'{%szmD
;Bc<u[G
/* 9h{:!
* (non-Javadoc) t+Q|l&|0
* r z>zdj5}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QK/+*hr;
*/ 2ucsTh@
public void sort(int[] data) { APOU&Wd
int[] temp=new int[data.length]; \Q BpgMi(
mergeSort(data,temp,0,data.length-1); g{f>jd
} 6d?2{_},
5 <>agK]
private void mergeSort(int[] data, int[] temp, int l, int r) { "Z1&z-
int i, j, k; %2FCpre;
int mid = (l + r) / 2; I}CA-8
if (l == r) DcvmeGl
return; ():?FJM
if ((mid - l) >= THRESHOLD) ,,-[P*@
mergeSort(data, temp, l, mid); 28L'7
else %l$&_xV-
insertSort(data, l, mid - l + 1); %emPSBf@
if ((r - mid) > THRESHOLD) 4m~stDlN
mergeSort(data, temp, mid + 1, r); bT6)(lm
else )*AA9
insertSort(data, mid + 1, r - mid); x;b+gIz*
m"> =QP
for (i = l; i <= mid; i++) { 7XI4=O};&%
temp = data; 5@r Zm4U
} Ydd>A\v\;
for (j = 1; j <= r - mid; j++) { i)^ZH#Gp
temp[r - j + 1] = data[j + mid]; W1,L>Az^Ts
} |$-d,] V
int a = temp[l]; l+kg4y
int b = temp[r]; ="nrq&2
for (i = l, j = r, k = l; k <= r; k++) { ^T J
if (a < b) { ("@V{<7(t
data[k] = temp[i++]; *'S%gR=Aa+
a = temp; )|1JcnNSa
} else { D0_x|a
data[k] = temp[j--]; g(F*Y>hk
b = temp[j]; S5JR`o
} ReGb.pf
} K*i1! "w
} Ac(Vw%
Hbj:CViYq
/** #YMp,i
* @param data hx;kEJ
* @param l ^cXL4*_=
* @param i 0GR9C%"]
*/ <("w'd}
private void insertSort(int[] data, int start, int len) { Nk~dfY<s
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); wN0OAbtX'
} qc4"0Ap'
} .L|ax).D
} *"bp}3$^^
} Y{:/vOj
= 8e8!8
堆排序： T7_ SO,X
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package org.rut.util.algorithm.support; uTloj.
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import org.rut.util.algorithm.SortUtil; Xr6 !b:UX
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/** .7^-*HT}
* @author treeroot r4>I?lD
* @since 2006-2-2 93eqFCF.
* @version 1.0 p?NjxQLA
*/ L/+J|_J)
public class HeapSort implements SortUtil.Sort{ JF\viMfR
7%FZXsD
/* (non-Javadoc) s5 'nWMo
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5WN Z7cO
*/ ^"#rDP"v
public void sort(int[] data) { e{+{,g{iu
MaxHeap h=new MaxHeap(); @BW8`Ky1
h.init(data); M HB]'
for(int i=0;i h.remove(); ZVR 9vw28
System.arraycopy(h.queue,1,data,0,data.length); `ha:Gf
} ,5"]K'Vce
#\["y%;W
private static class MaxHeap{ ._nKM5.
>o=p5#{
void init(int[] data){ EQhV}9
this.queue=new int[data.length+1]; nY0UnlB`
for(int i=0;i queue[++size]=data; 3^UsyZS)
fixUp(size); >Ga1p'8FtU
} (`Mz.VN
} ?YykCJJ ~@
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private int size=0; ~,1q :Kue
6EWB3.x19
private int[] queue; {EN@,3bA
BT#g?=n#`
public int get() { }f'1x%RS^
return queue[1]; @O @yJ{(I
} ,#O8:s
<~*Ol+/
public void remove() { j7+t@DqQ
SortUtil.swap(queue,1,size--); kw}1CXD
fixDown(1); 4^^rOi0
} u\?u4
file://fixdown eV%bJkt.
private void fixDown(int k) { i)3\jO0&GU
int j; ghj~r
while ((j = k << 1) <= size) { jP'b! 4
if (j < size %26amp;%26amp; queue[j] j++; E-iBA(H
if (queue[k]>queue[j]) file://不用交换 `\0a5UFR
break; K! j*:{
SortUtil.swap(queue,j,k); zL}hFmh
k = j; 1y;zPJ<ntm
} 04d$_1:}a
} EC&,0i4n:
private void fixUp(int k) { %.U{):lNx
while (k > 1) { {3Wc<&D C1
int j = k >> 1; X5<.%@Z
if (queue[j]>queue[k]) 93DBZqN
break; B'/ >Ax&
SortUtil.swap(queue,j,k); 0.0!5D[
k = j; f~9Y1|6
} $3B?
} ;qK6."b`;
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} I!O S&8:u
Lc?O K"[m
} Acv{XnB
5^/[]*
SortUtil： mIo7 K5z{
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package org.rut.util.algorithm; ptQ(7N
&2igX?60
import org.rut.util.algorithm.support.BubbleSort; ;)a9Y?
import org.rut.util.algorithm.support.HeapSort; `0D1Nh"%k
import org.rut.util.algorithm.support.ImprovedMergeSort; uJ\Nga<?
import org.rut.util.algorithm.support.ImprovedQuickSort; D:EF@il
import org.rut.util.algorithm.support.InsertSort; V~Lq,oth
import org.rut.util.algorithm.support.MergeSort; GA}^Rh`T-
import org.rut.util.algorithm.support.QuickSort; kc[["w&
import org.rut.util.algorithm.support.SelectionSort; MT0{hsuK9
import org.rut.util.algorithm.support.ShellSort; 2GzpWV(
Ti'kn{ Zv
/** s+- aHn
* @author treeroot ?!oa15
* @since 2006-2-2 V/e_:xECC
* @version 1.0 ]L^M7SKE6
*/ SqB|(~S
public class SortUtil { D0i30p`
public final static int INSERT = 1; xvl
public final static int BUBBLE = 2; N@)~j+Pz
public final static int SELECTION = 3; NM.B=<Aw*
public final static int SHELL = 4; f tDV3If
public final static int QUICK = 5; k;7.qhe:
public final static int IMPROVED_QUICK = 6; mO.U)tL[
public final static int MERGE = 7; I9>*Yy5RNS
public final static int IMPROVED_MERGE = 8; q04Dj-2<
public final static int HEAP = 9; |9eY R
2A+,. S_!x
public static void sort(int[] data) { J3;KQ}F.I
sort(data, IMPROVED_QUICK); n.RhA-O
} 7d)' y
private static String[] name={ eUlb6{!y?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" W<o0Z OO
}; qH"a!
-+|[0hpw
private static Sort[] impl=new Sort[]{ v1)6")8o+
new InsertSort(), Bnq\Gg
new BubbleSort(), yw!`1#3.
new SelectionSort(), AAgA]OD,
new ShellSort(), >oDP(]YGg
new QuickSort(), xS1|Z|&
new ImprovedQuickSort(), e]?S-J'z
new MergeSort(), F2'cL@E3
new ImprovedMergeSort(), [hbp#I~*[
new HeapSort() 9zd/5|W
}; O]eJQ4XN<
ArK9E!`^
public static String toString(int algorithm){ uD5yw#`
return name[algorithm-1]; wP?q5r5
} |0p'p$%
cyg>hX{U
public static void sort(int[] data, int algorithm) { k5(yf~!c
impl[algorithm-1].sort(data); :`1g{8.+
} HC,@tfS
H_nJST<v`
public static interface Sort { 7+4"+CA
public void sort(int[] data); 8ZfIh
} ^MV%\0o
=]"|x7'!
public static void swap(int[] data, int i, int j) { ifZNl,
int temp = data; Ypj)6d
data = data[j]; ,$$$_+m\
data[j] = temp; }4%)m
} \}NWR{=
} .+h pxZ