[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; =5YbK1Q^
} jX*gw6!
int i1=l; +[$Td%6
int i2=mid+1; jyidNPLm4
for(int cur=l;cur<=r;cur++){ w"O;: `|n
if(i1==mid+1) |tTcJ\bG
data[cur]=temp[i2++]; &4l!2
else if(i2>r) [MKt\(
data[cur]=temp[i1++]; }h8U.k?v
else if(temp[i1] data[cur]=temp[i1++]; Lc "{ePFh
else ZU2D.Kf_:
data[cur]=temp[i2++]; wnQi5P+
} s*eM}d.p
} 'AmA3x)9u
U#XW}T=|
} 7_lgo6
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改进后的归并排序: |W&K@g$
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package org.rut.util.algorithm.support; mGoC8t}iP
mD*!<<Sw
import org.rut.util.algorithm.SortUtil; P4c}@Mq3
!FB2\hiM
/** 1CV?
* @author treeroot 9[`\ZGWD
* @since 2006-2-2 f2v~: u
* @version 1.0 (#>Q#Izr
*/ ,jD-fL/:
public class ImprovedMergeSort implements SortUtil.Sort { .f!:@fX>=
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private static final int THRESHOLD = 10; 7;?7q
f3:dn7
/* RK)ikLgp
* (non-Javadoc) |I|,6*)xg
* %+UTs'I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ft iAty0n
*/ ]I;owk,
public void sort(int[] data) { o_[I#PT
int[] temp=new int[data.length]; yBv4 xKMH
mergeSort(data,temp,0,data.length-1); NL!xkcXO
} 0TiDQ4}i[
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private void mergeSort(int[] data, int[] temp, int l, int r) { 6Yqqq[#V/
int i, j, k; vSH-hAk
int mid = (l + r) / 2; yHZ&5
if (l == r) Wv,?xm
return; 'kg~#cf/+
if ((mid - l) >= THRESHOLD) U2\k7I
mergeSort(data, temp, l, mid); H;Gs0Qi;
else F:.8O ,%u
insertSort(data, l, mid - l + 1); !9j6l0
if ((r - mid) > THRESHOLD) *0r!eD
mergeSort(data, temp, mid + 1, r); HPo><u
else 4]Gm4zO
insertSort(data, mid + 1, r - mid); -;i:bE
F>%,}Y~B:
for (i = l; i <= mid; i++) { i=fhK~Jd
temp = data; wGHVq fm5
} ^a!oq~ZSy
for (j = 1; j <= r - mid; j++) { ?3v-ppw%
temp[r - j + 1] = data[j + mid]; QPvWdjf#mM
} )[yKO
int a = temp[l]; UM0#S}
int b = temp[r]; Kf$6D 79#
for (i = l, j = r, k = l; k <= r; k++) { \fYPz }wt
if (a < b) { X[?E{[@Z
data[k] = temp[i++]; zNEN[
a = temp; t!>0^['g4
} else { 8Kn}o@Yd
data[k] = temp[j--]; u(ETc*D]
b = temp[j]; `1FNs?j
} {%\;'&@z\
} Oj2=&uz
} Q H>g-@
";n%^I}
/** l[nf"'
* @param data 5\}QOL
* @param l (F:|tiV+
* @param i !wro7ilMB
*/ jd`]]FAww
private void insertSort(int[] data, int start, int len) { NG4@L1f%
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9G6auk.m.O
} azTiY@/
} ZMK1V)ohn
} kkj_k:Eah
} zThut!O
e)F_zX
堆排序： KT<N ;[;
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package org.rut.util.algorithm.support; w7<4D,hk
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import org.rut.util.algorithm.SortUtil; ^[2siG
]Rmu+N|
/** :/}=s5aQl/
* @author treeroot =knBwjeD
* @since 2006-2-2 fECmELd
* @version 1.0 = mhg@N4
*/ Yg1HvSw\
public class HeapSort implements SortUtil.Sort{ Z/;8eb*B7
~6OdwGWV
/* (non-Javadoc) 8PG&/"K
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FGpV ]p
*/ J]Q-#g'Z
public void sort(int[] data) { h?GE-F
MaxHeap h=new MaxHeap(); P>|sCF
h.init(data); ~k ]$J|}za
for(int i=0;i h.remove(); 8,B#W#*{
System.arraycopy(h.queue,1,data,0,data.length); G/KTF2wl7
} ~BXy)IB6
2nSz0 .
private static class MaxHeap{ @,pn/[
H\|H]:CE
void init(int[] data){ Jb8%A@Z+
this.queue=new int[data.length+1]; Q:Y`^jP
for(int i=0;i queue[++size]=data; "m}N hoD4
fixUp(size); op_ 1J;RF
} 2W63/kRbU
} Ye[Fu/0
SQJ4}w>i
private int size=0; #}UI
RggZ'.\
private int[] queue; :~,V+2e
!Jaj2mS.N
public int get() { ZP.~Y;Ch;-
return queue[1]; +n|@'= ]
} tYUo;V
.B6mvb\
public void remove() { !1bATO:x
SortUtil.swap(queue,1,size--); +1Rz+
fixDown(1); e&9v`8}
} Js9EsN%
file://fixdown _wZr`E)
private void fixDown(int k) { h<BTu7a`r
int j; -TyBb]
while ((j = k << 1) <= size) { {ka={7
if (j < size %26amp;%26amp; queue[j] j++; YXGxE&!
if (queue[k]>queue[j]) file://不用交换 1(Lq9hs`
break; h-*h;Uyc
SortUtil.swap(queue,j,k); +a'nP=e&
k = j; $,1KD3;+]
} @8SA^u0
} gZ {
private void fixUp(int k) { p4Xhs@.k
while (k > 1) { kyD*b3MN
int j = k >> 1; NcIr; }
if (queue[j]>queue[k]) k,r}X:<6jz
break; Qgl5Jr.
SortUtil.swap(queue,j,k); HB}iT1.`
k = j; )79F"ltzh
} /,ISx}
} tLGNYW!K
j<A; i
} +?0r%R%\
m$$sNPnT
} j|y"Lcq
Kr%O}<"
SortUtil： VQ4rEO=t
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package org.rut.util.algorithm; WAb@d=H{+>
e]7J_9t@
import org.rut.util.algorithm.support.BubbleSort; ov'C0e+o
import org.rut.util.algorithm.support.HeapSort; a &hj|
import org.rut.util.algorithm.support.ImprovedMergeSort; #:[CF:
import org.rut.util.algorithm.support.ImprovedQuickSort; :j;_Xw
import org.rut.util.algorithm.support.InsertSort; 28 ;x5m)N
import org.rut.util.algorithm.support.MergeSort; { b7%Zd3-
import org.rut.util.algorithm.support.QuickSort; D(Q=EdlO
import org.rut.util.algorithm.support.SelectionSort; C)ebZ3
import org.rut.util.algorithm.support.ShellSort; -$(2Z[
0C0ld!>r
/** {Ytqs(`
* @author treeroot oD%B'{Zs4
* @since 2006-2-2 2L7ogyrU/A
* @version 1.0 PE2O$:b\
*/ U~<~>^[
public class SortUtil { ^W[3RiG
public final static int INSERT = 1; w?M` gl8r
public final static int BUBBLE = 2; >jm^MS=
public final static int SELECTION = 3; x)e(g}n
public final static int SHELL = 4; Xxs0N_va&
public final static int QUICK = 5; F6 f
public final static int IMPROVED_QUICK = 6; ,<=_t{^
public final static int MERGE = 7; t~ z;G%a
public final static int IMPROVED_MERGE = 8; m2to94yh
public final static int HEAP = 9; ob7hNo#
Yr 1k\q
public static void sort(int[] data) { @)3orH
sort(data, IMPROVED_QUICK); S| l%JM^
} {o8K&XU#&t
private static String[] name={ Ny 7vId
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^xF-IA#ZeB
}; *Q,9 [k
s^-o_K\*c
private static Sort[] impl=new Sort[]{ r%` |kN
new InsertSort(), 4tFnZ2x
new BubbleSort(), >W=^>8u
new SelectionSort(), Trml?zexD
new ShellSort(), 3>G"&T{
new QuickSort(), `5t CmU
new ImprovedQuickSort(), 3aEO9v,n
new MergeSort(), QZ_8r#2x
new ImprovedMergeSort(), Cq<k(TKAX
new HeapSort() $WZHkV
}; Z`{GjV3%wH
*!yY7 ~#
public static String toString(int algorithm){ ^a;412
return name[algorithm-1]; :X#'ELo|
} vN`JP`IBx
$Q*^c"&
public static void sort(int[] data, int algorithm) { Ve\P,.
impl[algorithm-1].sort(data); _t\)W(E&
} 8fQaMn4V
p(S {k]ZL@
public static interface Sort { ci{WyIh
public void sort(int[] data); xU$15|ny
} '=>l& ;
^%m~VLH
public static void swap(int[] data, int i, int j) { jo[U6t+pj7
int temp = data; D P+W*87J
data = data[j]; '8UhYwyr
data[j] = temp; to;cF6X
} d8/KTl
} (KdP^.7