[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; >0W:snNK
} 43"`gF]
int i1=l; Y 7a<3>
int i2=mid+1; *<PQp
for(int cur=l;cur<=r;cur++){ xMAfa>]{n
if(i1==mid+1) f:_\S
data[cur]=temp[i2++]; -gWqq7O
else if(i2>r) vakAl;
data[cur]=temp[i1++]; =,/08Cs
else if(temp[i1] data[cur]=temp[i1++]; W3XVr&
else "pDwN$c
data[cur]=temp[i2++]; Kd?TIeFE
} #+vIq?
} SD"'
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} eVobs2s
x-Kq=LFy.
改进后的归并排序: 1^*M*>&d<
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package org.rut.util.algorithm.support; jm_b3!J
`uO(#au,U
import org.rut.util.algorithm.SortUtil; I.[2-~yf
vPm&0,R*y:
/** hPs7mnSW
* @author treeroot h}X^
* @since 2006-2-2 6*] g)m
* @version 1.0 7X h'VOljB
*/ Xndgs}zz
public class ImprovedMergeSort implements SortUtil.Sort { "ooq1 0P
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private static final int THRESHOLD = 10; tgy= .o]
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/* W6_~.m"b
* (non-Javadoc) tOJK~%'
* u!=9.3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O "jX|5
*/ U*G8}W
public void sort(int[] data) { BO#XQ,
int[] temp=new int[data.length]; ~i)m(65:
mergeSort(data,temp,0,data.length-1); {*gO1TZt9
} N$8do?
FT*OF 3
private void mergeSort(int[] data, int[] temp, int l, int r) { ,_STt)
int i, j, k; {XT3M{`rWL
int mid = (l + r) / 2; &n_aMZ;
if (l == r) :L~{Q>o
return; pzX684
if ((mid - l) >= THRESHOLD) OLThi[Yn
mergeSort(data, temp, l, mid); |v,5s=}7
else N7S?m@
insertSort(data, l, mid - l + 1); RoV^sbWFt
if ((r - mid) > THRESHOLD) -dCM eC
mergeSort(data, temp, mid + 1, r); 334UMH__
else y\=(;]S'
insertSort(data, mid + 1, r - mid); V'kCd4
^hG Y,\K9
for (i = l; i <= mid; i++) { _0~WT
temp = data; [(Z sQK
} T=/GFg'
for (j = 1; j <= r - mid; j++) { qb^jcy
temp[r - j + 1] = data[j + mid]; ]g#ur@Y%
} |'w_5?|4
int a = temp[l]; K4]42#
int b = temp[r]; Rgb1B3gu
for (i = l, j = r, k = l; k <= r; k++) { Pm2T!0
if (a < b) { .T*K4m{b0
data[k] = temp[i++]; :6~DOvY
a = temp; O}4(v#
} else { 7MRu=Z.-b
data[k] = temp[j--]; Gi7jgv{{
b = temp[j]; 9ghZLQ
} ttazY#
} D}n&`^1X+
} _cz&f%qr
f.V1
/** wYZ"fusT
* @param data %9D$N
* @param l eBZa9X$
* @param i cY%[UK$l
*/ c\X0*GX
private void insertSort(int[] data, int start, int len) { m7zx,bz>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ooJ ^8L
} oSmv (O
} 3Uzb]D~u
} 4)'8fi
} 2_^{Vez@I
SfKm]Z>Hp
堆排序： d>ltL`xn
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package org.rut.util.algorithm.support; p&B c<+3e
jft%\sY
import org.rut.util.algorithm.SortUtil; 4vri=P 2%
.C]V==z`[4
/** ^P5+ _P
* @author treeroot jy=dB-&
* @since 2006-2-2 rgQ6/3}qc
* @version 1.0 A=Au>"nAA
*/ qT`sPEs;V
public class HeapSort implements SortUtil.Sort{ z^+`S:
\(y6o}aW
/* (non-Javadoc) 7qfo%n"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X!+#1NPM
*/ vmI2o'zi
public void sort(int[] data) { h@{U>U7
MaxHeap h=new MaxHeap(); mL\j^q,Y
h.init(data); adHZX
for(int i=0;i h.remove(); <+MNv#1:w
System.arraycopy(h.queue,1,data,0,data.length); =@#[@Ia
} %O5 k+~9
txF)R[dZK
private static class MaxHeap{ `;[j`v8O
BMw_F)hTO
void init(int[] data){ sE*A,z?
this.queue=new int[data.length+1]; ENlqoj1
for(int i=0;i queue[++size]=data; PJC[#>}
fixUp(size); !Vtt.j &4
} "NUl7ce.R
} ?klV;+
.C avb
private int size=0; n^8LF9r
#;Yn8'a~
private int[] queue; u{0'"jVJ
hkzyI~7
public int get() { [ vU$zZ<
return queue[1]; OiB*,TWV
} %9z N U
|meo
public void remove() { &3x \wH/_
SortUtil.swap(queue,1,size--); cY+vnQm
fixDown(1); y %dUry%>
} Fs^d-I
file://fixdown >>lT-w
private void fixDown(int k) { hg}Rh
int j; :e-&,K
while ((j = k << 1) <= size) { EleK*l
if (j < size %26amp;%26amp; queue[j] j++; DKV^c'
if (queue[k]>queue[j]) file://不用交换 $gi{)'z
break; SvUC8y
SortUtil.swap(queue,j,k); Am~NBQ7
k = j; xrbDqA.b
} [aM_.[bf
} AXBv']Y
private void fixUp(int k) { P0m;AqS#R
while (k > 1) { n\v\<mVTb7
int j = k >> 1; :Jp$_T&E
if (queue[j]>queue[k]) z7+y{-{Z
break; ([loWr}QR
SortUtil.swap(queue,j,k); %|(~k*s4
k = j; ]=A=VH&
} 28l",j)S
} ],ow@}
,BM6s,\
} 9*!C|gC9Ia
<v<TsEI
} /yHM=&Vg]
WNkAI9B
SortUtil： qzv$E;zAl
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package org.rut.util.algorithm; r>+Hwj0>
O=os ,'"
import org.rut.util.algorithm.support.BubbleSort; vF, !8e'v
import org.rut.util.algorithm.support.HeapSort; ?#@JH
import org.rut.util.algorithm.support.ImprovedMergeSort; D:Zpls.
import org.rut.util.algorithm.support.ImprovedQuickSort; TGxspmY6
import org.rut.util.algorithm.support.InsertSort; ?}*A/-Hx0U
import org.rut.util.algorithm.support.MergeSort; 'T54k
import org.rut.util.algorithm.support.QuickSort; Y21,!$4gb
import org.rut.util.algorithm.support.SelectionSort; Q1qf'u
import org.rut.util.algorithm.support.ShellSort; 8Rq+eOP=S
<fX]`57Dc`
/** pm<zw-
* @author treeroot {r2-^QHF
* @since 2006-2-2 YQ>P{I%J
* @version 1.0 ;I'pC?!y
*/ jKV,i?
public class SortUtil { wyO@oi Vn
public final static int INSERT = 1; XAuB.)|
public final static int BUBBLE = 2; Ya] qo]
public final static int SELECTION = 3; b&uo^G,
public final static int SHELL = 4; l 6wX18~XJ
public final static int QUICK = 5; \LB =_W$
public final static int IMPROVED_QUICK = 6; nVI\Or[
public final static int MERGE = 7; XZhX%OT!
public final static int IMPROVED_MERGE = 8; v'`9^3(-
public final static int HEAP = 9; 5q[0;`J
pyK|zvr-r
public static void sort(int[] data) { =~YmM<L
sort(data, IMPROVED_QUICK); 3=9yR**
} aK'`yuN
private static String[] name={ }?B=R#5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \nV|Y=5
}; t5h]]TOz
['pk/h
private static Sort[] impl=new Sort[]{ _%Ay\4H^\
new InsertSort(), kvh}{@|-
new BubbleSort(), Xui${UYN
new SelectionSort(), _+K[1P
new ShellSort(), *a Y`[,4#$
new QuickSort(), +~J?/
new ImprovedQuickSort(), d,au&WZ;_
new MergeSort(), c_xtwdkL9
new ImprovedMergeSort(), fclmxTy
new HeapSort() x#"|Z&Dw0
}; :u#Ls,OZz
E"iH$NN
public static String toString(int algorithm){ SymSAq0$F
return name[algorithm-1]; "HFS5Bj'
} 03L"W^gc
-!(
public static void sort(int[] data, int algorithm) { ,-Fhb~u
impl[algorithm-1].sort(data); i> Ssp
} G~T]m .
p~M1}mE
public static interface Sort { fAWjk&9
public void sort(int[] data); ,YFuMek
} NUBzmnA>8
0`/PEK{
public static void swap(int[] data, int i, int j) { vrXmzq
int temp = data; D1bS=> ;,"
data = data[j]; +=%13cA*U
data[j] = temp; FQ?,&s$Bmd
} j[YzBXd V
} =flgKRKk.r