[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; Y5i`pY/}#?
} Cb%.C;q
int i1=l; BdoC6H
int i2=mid+1; fpK0MS]=b
for(int cur=l;cur<=r;cur++){ "p~]m~g
if(i1==mid+1) B mBzOk^
data[cur]=temp[i2++]; /yw\(|T
else if(i2>r) h GA0F9.U
data[cur]=temp[i1++]; &8_f'+i0
else if(temp[i1] data[cur]=temp[i1++]; d+m6-4[_k
else C|d!'"p
data[cur]=temp[i2++]; (_&V9vat=
} K?Xo3W%K
} 1[/$ZYk:
d[RWkk5
} P$6f+{
:YJ7J4
改进后的归并排序: R#7+
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package org.rut.util.algorithm.support; ,4>WLJDo
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import org.rut.util.algorithm.SortUtil; x:n9dm
:&1=8^BY
/** nA_ zP4
* @author treeroot kk/+Vx~
* @since 2006-2-2 J<($L}T*$
* @version 1.0 nhQ44qRgQ
*/ AeY$.b
public class ImprovedMergeSort implements SortUtil.Sort { Bsu=^z
! F;<xgw
private static final int THRESHOLD = 10; D=82$$
RdvPsv}D
/* D#/%*|
* (non-Javadoc) Wq{d8|)1
* X6Nm!od'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5<)gCHa
*/ =8$0$d
public void sort(int[] data) { kHJDX;
int[] temp=new int[data.length]; PK2Rj%
mergeSort(data,temp,0,data.length-1); wKi}@|0[@
} }KD7 Y
2iR:*}5
private void mergeSort(int[] data, int[] temp, int l, int r) { [aWDD[#j~
int i, j, k; 5&-j{J0iV
int mid = (l + r) / 2; l)i&ATvCE
if (l == r) Q/3tg
return; *_{l
if ((mid - l) >= THRESHOLD) p(H)WD
mergeSort(data, temp, l, mid); "BLv4s|y7L
else "%}Gy>;
insertSort(data, l, mid - l + 1); TJyH/C
if ((r - mid) > THRESHOLD) Gdf1+mi
mergeSort(data, temp, mid + 1, r); XAQ\OX#
else %TW%|"v
insertSort(data, mid + 1, r - mid); ~`~%(DA=
z)ft3(!
for (i = l; i <= mid; i++) { 0279g
temp = data; 2Z/][?Jj{
} ebO`A2V'(
for (j = 1; j <= r - mid; j++) { rF8W(E_=
temp[r - j + 1] = data[j + mid]; }1a<{&
} %0+h
int a = temp[l]; <=)D=Ax/_[
int b = temp[r]; 3XApY'
for (i = l, j = r, k = l; k <= r; k++) { \tiUEE|k
if (a < b) { `'[7~Ew[
data[k] = temp[i++]; WbC0H78]
a = temp; 9zoT6QP4
} else { -TK|Y"
data[k] = temp[j--]; P|e:+G7
b = temp[j]; rR,+G%[(=4
} F=-uDtQ<N
} .Ca"$2
} "}'8`k+d
:Wyn+
/** P0'e"\$
* @param data `N|U"s;
* @param l nJtEUVMt
* @param i 7x[LF ^o
*/ ( Lok
private void insertSort(int[] data, int start, int len) { Xq8uY/j
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !fQJL
} DD12pL{QA
} zz(!t eBC
} ;NiArcAS!
} X zi'Lu`
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堆排序： *Fa)\.XX
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package org.rut.util.algorithm.support; QvG56:M3
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import org.rut.util.algorithm.SortUtil; B\=SAi
tr6jh=
/** yCF"Z/.
* @author treeroot [+g(
* @since 2006-2-2 <mv7HKVg
* @version 1.0 Je#!Wd
*/ #dva0%-1
public class HeapSort implements SortUtil.Sort{ /<3;0~#){
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/* (non-Javadoc) g9yaNelDh)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Veb+^&
*/ Lv `#zgo_f
public void sort(int[] data) { 2-vJv+-
MaxHeap h=new MaxHeap(); ^lHb&\X
h.init(data); 1fz*SIjG
for(int i=0;i h.remove(); -M7K8
System.arraycopy(h.queue,1,data,0,data.length); wF|0n t
} Yw$a{5g
{l&Ltruhz
private static class MaxHeap{ 82j'MgGP
(Oxz'#TX
void init(int[] data){ "C_T]%'Wm
this.queue=new int[data.length+1]; !GlnQ`T
for(int i=0;i queue[++size]=data; 5x*5|8
fixUp(size); t$U3|r
} nc3sty1`
} ES^>[2Y
L*zbike
private int size=0; (NGu9uJs
(H&@u9K?a?
private int[] queue; qSFc=Wwc
GY oZ$p"C
public int get() { rPRrx-A
return queue[1]; 38[)[{G)Hv
} jP1$qhp
bjPka{PBj
public void remove() { 6eOrs-ty
SortUtil.swap(queue,1,size--); mND XzT&
fixDown(1); NJn&>/vM
} aQ(`6DQv
file://fixdown 7cIC&(h5
private void fixDown(int k) { iLF^%!:X%
int j; uY.=4l
while ((j = k << 1) <= size) { l%rx#;=u
if (j < size %26amp;%26amp; queue[j] j++; cqeR<len
if (queue[k]>queue[j]) file://不用交换 /SnynZ.q
break; :|Z$3q
SortUtil.swap(queue,j,k); R;H?gE^m-
k = j; 1a<]$tZk
} J__;.rnk
} lkV6qIj
private void fixUp(int k) { ,VPbUo@
while (k > 1) { +p13xc?#j
int j = k >> 1; 'I&|1I^
if (queue[j]>queue[k]) ,`;jvY~Ec
break; HR;/Br
SortUtil.swap(queue,j,k); uA~YRKer
k = j; -@rxiC:Q
} HV ;;
} D,MyI#
GtF2@\
} Z`rK\Bc
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} }<SNO)h3
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SortUtil： :bwM]k*$
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package org.rut.util.algorithm; |Dg;(i?
{T&v2u#S
import org.rut.util.algorithm.support.BubbleSort; VJ3hC[
import org.rut.util.algorithm.support.HeapSort; $Z/klSEf
import org.rut.util.algorithm.support.ImprovedMergeSort; hF2/ y.:P
import org.rut.util.algorithm.support.ImprovedQuickSort; Yy]T J
import org.rut.util.algorithm.support.InsertSort; L{=l#vu
import org.rut.util.algorithm.support.MergeSort; N;<//,
import org.rut.util.algorithm.support.QuickSort; <D;MT96SG
import org.rut.util.algorithm.support.SelectionSort; "LOnDa7E^
import org.rut.util.algorithm.support.ShellSort; J2r1=5HS
Yrpxy.1=F5
/** 'V&2Xvl%
* @author treeroot $'^&\U~?
* @since 2006-2-2 v51EXf
* @version 1.0 U|8[#@r
*/ oAY_sg+
public class SortUtil { W}>=JoN^J
public final static int INSERT = 1; ; yyO0Ha
public final static int BUBBLE = 2; tevQW
public final static int SELECTION = 3; GJX4KA8J
public final static int SHELL = 4; Y&s2C%jT
public final static int QUICK = 5; `|]e6Pb
public final static int IMPROVED_QUICK = 6; }'lNi^"XL
public final static int MERGE = 7; Q!K`e)R
public final static int IMPROVED_MERGE = 8; [G a~%m
public final static int HEAP = 9; &eIGF1ws
m=QCG)s
public static void sort(int[] data) { VpSEVd:n
sort(data, IMPROVED_QUICK); CN/IH
} @;m$ua*|:
private static String[] name={ ;`kWpM;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" W}h|K:-S
}; X/Y#U\
GQx9u^>
private static Sort[] impl=new Sort[]{ {7X#4o0
new InsertSort(), 2Pp&d>E4
new BubbleSort(), |6%.VY2b
new SelectionSort(), "V3}t4
new ShellSort(), ,d|vP)SS
new QuickSort(), Tw//!rpG
new ImprovedQuickSort(), L~dC(J)@ZI
new MergeSort(), Noh?^@T`Ov
new ImprovedMergeSort(), IZ8y}2
new HeapSort() OC_M4{9/
}; J3G7zu8
:mpiAs<%U"
public static String toString(int algorithm){ =OYQM<q
return name[algorithm-1]; W/r^ugDV
} I]X
cOkgoL" 4
public static void sort(int[] data, int algorithm) { H?uukmZl
impl[algorithm-1].sort(data); 4\p-TPM
} '"'Btxz
H] k'?;
public static interface Sort { jJ~Y]dQi
public void sort(int[] data); zE`R,:VI
} 0+EN@Y^dAV
Uki9/QiX>
public static void swap(int[] data, int i, int j) { ,)h)5o(?
int temp = data; B!bsTvX
data = data[j]; B wC+ov=
data[j] = temp; tWY2o3j
} pUCK-rL
} (KTnJZ