[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; rbnu:+!
} UcMe("U
int i1=l; >qn@E?Uf
int i2=mid+1; }TRr*] P<%
for(int cur=l;cur<=r;cur++){ W|T"'M_
if(i1==mid+1) .ukP)rGe
data[cur]=temp[i2++]; [&rW+/
else if(i2>r) 0>-l {4srs
data[cur]=temp[i1++]; @T1/S&F=
else if(temp[i1] data[cur]=temp[i1++]; i\B>J?Q\
else lC6#EU;
data[cur]=temp[i2++]; Kbc-$oneR
} L_jwM^8
} _Bh-*l?K>
k6~k
} :&`Yz
c3|;'s
改进后的归并排序: ^Y xqJy
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package org.rut.util.algorithm.support; o><~.T=d&
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import org.rut.util.algorithm.SortUtil; UJoWTx
F5%-6@=
/** 3vOI=ar=L~
* @author treeroot qTiUha9
* @since 2006-2-2 C%v@u$N
* @version 1.0 -,96Qg4vI
*/ ##,i<
public class ImprovedMergeSort implements SortUtil.Sort { 4aAr|!8|h!
0i$jtCCL(
private static final int THRESHOLD = 10; C4Q^WU+$j
#JZf]rtp
/* x#|P-^
* (non-Javadoc) 6(oGU4
* lw? f2_fi
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w"-bO ~5h
*/ V/|Ln*rm
public void sort(int[] data) { t9m:E
int[] temp=new int[data.length]; E[LXZh
mergeSort(data,temp,0,data.length-1); gi:;{
} Ih`n:aA
YjS|Ht->
private void mergeSort(int[] data, int[] temp, int l, int r) { J mFzSR?}
int i, j, k; YFLWkdqAY
int mid = (l + r) / 2; m |,ocz
if (l == r) gSu+]N
return; .gT@_.ZD9
if ((mid - l) >= THRESHOLD) 8&ZUkDGkJ
mergeSort(data, temp, l, mid); R]/F{Xs
else ^k^%w/fo
insertSort(data, l, mid - l + 1); b_Ba0h=
if ((r - mid) > THRESHOLD) I]Wb\&$
mergeSort(data, temp, mid + 1, r); )TyL3Z\>(
else r7*[k[^[^
insertSort(data, mid + 1, r - mid); ~srmlBi6
7z=Ss'O]
for (i = l; i <= mid; i++) { TDY}oGmNn
temp = data; +zs;>'Sf
} <g,k[
for (j = 1; j <= r - mid; j++) { O(/K@e
temp[r - j + 1] = data[j + mid]; 1WcT>_$
} J~<:yBup}
int a = temp[l]; 4pq>R
int b = temp[r]; ?Dm!;Z+7
for (i = l, j = r, k = l; k <= r; k++) { H:9( XW
if (a < b) { DfV_08
data[k] = temp[i++]; wGISb\rr
a = temp; ffm19B=
} else { 5yxZ 5Ni!
data[k] = temp[j--]; |=38t8Ge&
b = temp[j]; o|alL-
} Cj5M
} ~v,LFIT
} )OH!<jW
i>,5b1x~
/** IO>Cyo
* @param data [ Q=)f
* @param l sTv/;*
* @param i 7\a(Imq
*/ 3QUe:8
private void insertSort(int[] data, int start, int len) { D9H|]W~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <ze'o.c
} C)#:zv m
} `?=AgGg
} qg.[M*
} !h&hPY1
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堆排序： oi"Bf7{
z0g]nYN%
package org.rut.util.algorithm.support; c q3CN@
(eO0Ic[c
import org.rut.util.algorithm.SortUtil; A2rr>
j*QY_Ny*
/** J4lE7aFDA~
* @author treeroot W11_MTIU
* @since 2006-2-2 2[M:WZ.1
* @version 1.0 &g) `
*/ m(g$T
public class HeapSort implements SortUtil.Sort{ B}P,sFghw
eX_}KH-Q
/* (non-Javadoc) tinN$o Xy
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =/dW5qy;*+
*/ sSD(mO<(
public void sort(int[] data) { IUc!nxF#
MaxHeap h=new MaxHeap(); ItOVx!"@9
h.init(data); 5QSd$J
for(int i=0;i h.remove(); `i{o8l
System.arraycopy(h.queue,1,data,0,data.length); >r]# 77d
} Mh_jlgE'd#
k,?Y`s
private static class MaxHeap{ z=ppNP0
Nb]qY>K
void init(int[] data){ )b!q
this.queue=new int[data.length+1]; <o?qpW$,>
for(int i=0;i queue[++size]=data; 8<.KWr
fixUp(size); #v(+3Hp
} _|tg#i|Om
} '{:(4>&
4vBbP;ELWq
private int size=0; mH8s'F
B[$KnQM9Y
private int[] queue; 2EK\QWo
B0R[f
public int get() { L</"m[
return queue[1]; gXw\_ue<
} }#E4t3
/ m?Z!
public void remove() { a~XNRAh
SortUtil.swap(queue,1,size--); :K8T\
fixDown(1); ,Y!T!o}1
} ~s5Sk#.z5
file://fixdown DK)qBxc8
private void fixDown(int k) { cJ[n<hTv
int j; b<5:7C9z
while ((j = k << 1) <= size) { Vn8Qsf1f
if (j < size %26amp;%26amp; queue[j] j++; ,vN#U&RS
if (queue[k]>queue[j]) file://不用交换 ( I,V+v+{Y
break; %0u7pk
SortUtil.swap(queue,j,k); h/_z QR-
k = j; !J2Lp
} slQKkx \Dn
} Kw?,A
private void fixUp(int k) { W%h<@@c4,
while (k > 1) { E-"Jgq\aC
int j = k >> 1; MESQAsx%
if (queue[j]>queue[k]) BC4u,4S
break; a[#4Oq/t$
SortUtil.swap(queue,j,k); f%@Y XGf
k = j; t"BpaA^gO
} ekAGzu
} RNt3az
"+XO[WGc
} +ubO-A?
9f"6Jw@F
} Wq>j;\3b3
nK96A.B%p
SortUtil： uox;PDK
vF([mOZ
package org.rut.util.algorithm; 0cS.|\ZTA
vMC;5r6*d
import org.rut.util.algorithm.support.BubbleSort; &=7ur
import org.rut.util.algorithm.support.HeapSort; ~O^_J)
import org.rut.util.algorithm.support.ImprovedMergeSort; h2BD?y
import org.rut.util.algorithm.support.ImprovedQuickSort; Bo~wD|E2
import org.rut.util.algorithm.support.InsertSort; _D+7w'8h
import org.rut.util.algorithm.support.MergeSort; +b{h*WWdj
import org.rut.util.algorithm.support.QuickSort; {u5)zVYC,U
import org.rut.util.algorithm.support.SelectionSort; 49kY]z|"w
import org.rut.util.algorithm.support.ShellSort; yNN2}\[.
6U""TR!
/** qBwqxxTc
* @author treeroot \+>b W(
* @since 2006-2-2 T[;{AXLeI
* @version 1.0 $==hr^H
*/ =oHJ_
public class SortUtil { <]!IC]+
public final static int INSERT = 1; |owhF
public final static int BUBBLE = 2; (h%wO
public final static int SELECTION = 3; i$NnHj|
public final static int SHELL = 4; jgO{DNe(=
public final static int QUICK = 5; )O+9v}2
public final static int IMPROVED_QUICK = 6; 5GRN1Aov<
public final static int MERGE = 7; nC*/?y*9
public final static int IMPROVED_MERGE = 8; Ugs<WVp$
public final static int HEAP = 9; vu#:D1/BB
<w:fR|O
public static void sort(int[] data) { IM@Qe|5
sort(data, IMPROVED_QUICK); LvAIAknc
} HR V/ A
private static String[] name={ >:Oo[{)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" f9rToH
}; YA|*$$
%NBD^gF
private static Sort[] impl=new Sort[]{ ;L)}blN.
new InsertSort(), 5N6%N1
new BubbleSort(), `BvcIn4do
new SelectionSort(), n}+ DO6J
new ShellSort(), {jl4`
new QuickSort(), +`4|,K7'
new ImprovedQuickSort(), TwkzX|
new MergeSort(), AsLAm#zq
new ImprovedMergeSort(), Du{]r[[C
new HeapSort() N;w1f"V}
}; 8sIGJ|ku
Gmwn:
public static String toString(int algorithm){ `rcjZ^n
return name[algorithm-1]; H;CGLis
} UFl*^j_)]
e (f)?H
public static void sort(int[] data, int algorithm) { JDs<1@\
impl[algorithm-1].sort(data); (>jME
} U8c0C/
g5"g,SFGr
public static interface Sort { Z4e?zY
public void sort(int[] data); dYsqF 3f
} \i&yR]LF
3Q#VD)
public static void swap(int[] data, int i, int j) { Ff,M~zn
int temp = data; %_u3Np
data = data[j]; IFE C_F>
data[j] = temp; x;SrJVDN
} 4*54"[9Hr#
} *= D$