[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; W.R'2R#
} .0-m=3mp2
int i1=l; o'4@]ae
int i2=mid+1; S- \lN|
for(int cur=l;cur<=r;cur++){ '9dtIW6E
if(i1==mid+1) / IS WC
data[cur]=temp[i2++]; //,'oh~W
else if(i2>r) Cr%r<*s
data[cur]=temp[i1++]; KEN-G
else if(temp[i1] data[cur]=temp[i1++]; n6Zx0ad?
else |*NrS<"
data[cur]=temp[i2++]; @(?4g-*E
} 2ML6Lkk
} ***a2Z/(
F]EBD8/b
} ;W]\rft[
x|i_P|Z
改进后的归并排序: 4;<ut$G
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package org.rut.util.algorithm.support; g^7MMlY%
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import org.rut.util.algorithm.SortUtil; 6*45Vf
>yB(lKV
/** H,QTYXi "
* @author treeroot UAn&\8g_
* @since 2006-2-2 kLj$@E`4
* @version 1.0 @WMA}\Cc
*/ .uF[C{RnO
public class ImprovedMergeSort implements SortUtil.Sort { 5T@aCC@$h
8|6 4R:
private static final int THRESHOLD = 10; H[ m<RaG8
l{Dct\ #s
/* ^uBxgWIC
* (non-Javadoc) i,IB!x
* -VxDNT}Tr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3]RyTQ
*/ q1?&Ev^
public void sort(int[] data) { 0@I S
int[] temp=new int[data.length]; zCv"]%
mergeSort(data,temp,0,data.length-1); _8,()t'"
} <-'$~G j
]\ !5}L
private void mergeSort(int[] data, int[] temp, int l, int r) { `h:34RC;
int i, j, k; J(DN!
int mid = (l + r) / 2; $5x ,6[&
if (l == r) #J (~_%Wi
return; d.UQW yLG
if ((mid - l) >= THRESHOLD) 7x);x/#8Z
mergeSort(data, temp, l, mid); GZI`jS"lU
else F8-?dpf'
insertSort(data, l, mid - l + 1); ljTBvU
if ((r - mid) > THRESHOLD) ?;[w" `"
mergeSort(data, temp, mid + 1, r); ktIi$v
else %\]*OZ7
insertSort(data, mid + 1, r - mid); h8Yx#4
(e(:P~Ry
for (i = l; i <= mid; i++) { svxw^0~a
temp = data; .7K7h^*F
} .X# `k
for (j = 1; j <= r - mid; j++) { fhL,aCS=
temp[r - j + 1] = data[j + mid]; i&{DOI%w
} -py@DzK
int a = temp[l]; ]a5 f2lE
int b = temp[r]; jv&*uYm
for (i = l, j = r, k = l; k <= r; k++) { 0lhVqy}:}o
if (a < b) { "g$IP9?U
data[k] = temp[i++]; :Nofp&
a = temp; ``wSc0\
} else { bv&;R
data[k] = temp[j--]; +v=C@2T
b = temp[j]; dqN5]Sb2B
} yUpgoX(6
} Q~Hy%M%R3
} )wT-8o
<J^MCqp!v
/** Hy^N!rBxfO
* @param data B)0i:"q
* @param l %}%Qc6.H
* @param i 'FDef#P<
*/ +0OLc2 )w
private void insertSort(int[] data, int start, int len) { _H5o'>=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); S:OO0<W
} cXKjrL[b
} u:=7l
} Ymg|4%O@
} p>4-s, W
; #&yn=^
堆排序： INJEsz
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package org.rut.util.algorithm.support; "thdPZ
sVOyT*GY
import org.rut.util.algorithm.SortUtil; S[J}UpV
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/** $42{HFGq
* @author treeroot g\&g N
* @since 2006-2-2 ]GW]dM
* @version 1.0 /w}u3|L$
*/ =,6z4" )
public class HeapSort implements SortUtil.Sort{ ^G}47(
]SLP}Jwy
/* (non-Javadoc) l4uMG]m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }khV'6"'|
*/ ` 2V19s]
public void sort(int[] data) { 1=d6NX)B
MaxHeap h=new MaxHeap(); pSdI/Vj'=
h.init(data); <h:x=
for(int i=0;i h.remove(); RwpdRBb
System.arraycopy(h.queue,1,data,0,data.length); n<z[J=I
} CDK5
qKr8)}h
private static class MaxHeap{ d,B:kE0Y
JR@`2YP-
void init(int[] data){ 3sy (vC
this.queue=new int[data.length+1]; Lh!J >
for(int i=0;i queue[++size]=data; a%/9v"}
fixUp(size); 42$VhdG
} kuszb~`zPY
} Ku5\]
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private int size=0; r\'A i6
^:^9l1]
private int[] queue; 7QiIiWqIWC
:VRNs
public int get() { e> e}vZlX
return queue[1]; &8Cu#^3
} R;uvkg[o
D#cyOrzy
public void remove() { Y']\Jq{OS
SortUtil.swap(queue,1,size--); ` Mjj@[
fixDown(1); fg_4zUGM+g
} %Nlt H/I
file://fixdown [%y';`( x
private void fixDown(int k) { O_oPh]x)
int j; 4&<oFW\r
while ((j = k << 1) <= size) { +Vb.lH[av
if (j < size %26amp;%26amp; queue[j] j++; iVhJ t#_b
if (queue[k]>queue[j]) file://不用交换 \A 2r]
break; J=9FRC
SortUtil.swap(queue,j,k); >JHryS.j$4
k = j; FH?U(-
} FtP0krO(
} I8hz(2jI
private void fixUp(int k) { )WNzWUfn=z
while (k > 1) { 8]M;T>n[
int j = k >> 1; -`*a'p-=
if (queue[j]>queue[k]) !#], hok8X
break; @Q)OGjaq
SortUtil.swap(queue,j,k); + [iQLM?zo
k = j; jFQQ`O V
} %aG5F}S2~
} GFj{K
n`? py
} x|/|jzJSX
9&-dTayIz
} q(
B]nEkO'a:
SortUtil： L*Tj^q!t+
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package org.rut.util.algorithm; |^&b8
],@rS9K
import org.rut.util.algorithm.support.BubbleSort; xgwY@'GN
import org.rut.util.algorithm.support.HeapSort; (yH'{6g\
import org.rut.util.algorithm.support.ImprovedMergeSort; $SlIr<'*"
import org.rut.util.algorithm.support.ImprovedQuickSort; K0u|U`
import org.rut.util.algorithm.support.InsertSort; g;H=6JeG/
import org.rut.util.algorithm.support.MergeSort; lUOF4U&r
import org.rut.util.algorithm.support.QuickSort; F%@A6'c
import org.rut.util.algorithm.support.SelectionSort; aB_F9;IR
import org.rut.util.algorithm.support.ShellSort; @:oXN]+ _
>~''&vdsk\
/** , Rk9N
* @author treeroot JA %J$d
* @since 2006-2-2 |UkR'Ma
* @version 1.0 J?*1*h
*/ 3lf=b~Zi)
public class SortUtil { R[zpD%CI
public final static int INSERT = 1; C'>|J9~Gz
public final static int BUBBLE = 2; 2i)^!c
public final static int SELECTION = 3; QVv#fy1"6
public final static int SHELL = 4; MUaq7B_>
public final static int QUICK = 5; bZ dNibN
public final static int IMPROVED_QUICK = 6; GoJ.&aH $
public final static int MERGE = 7; sfpZc7
public final static int IMPROVED_MERGE = 8; mUNn%E:7@{
public final static int HEAP = 9; +jAGGv^)
:N:yLd} &
public static void sort(int[] data) { tP:lP#9
sort(data, IMPROVED_QUICK); YX!{P=Ua
} PIJr{6B/PA
private static String[] name={ d?y4GkK
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $[Sc0dzJ
}; jte.Xy~g
1XrO~W\=
private static Sort[] impl=new Sort[]{ h\$$JeSV]
new InsertSort(), +! ]zA4x
new BubbleSort(), ny]?I
new SelectionSort(), } +TORR?
new ShellSort(), Fe# 1
new QuickSort(), gt\E`HB8E
new ImprovedQuickSort(), G'nmllB`]
new MergeSort(), _:ReN_0
new ImprovedMergeSort(), WQx?[tW(U
new HeapSort() Q{O+
}; $By<$
KKb,d0T[
public static String toString(int algorithm){ ^a/gBC82x
return name[algorithm-1]; AgWa{.`f:
} g1;:KzVv
cb@?}(aFl
public static void sort(int[] data, int algorithm) { 2+RUTOv/d
impl[algorithm-1].sort(data); .Hescg/S
} m~w[~flgZ
O;+ maY^l
public static interface Sort { N,<uf@LQ
public void sort(int[] data); UBv,=v
} 3RigzT3
Ka'=o?'B5
public static void swap(int[] data, int i, int j) { C>]0YO k2
int temp = data; *zaQx+L
data = data[j]; $CRm3#+ ~
data[j] = temp; bYcV$KJk
} V"[g.%%Y
} 7dN*lks