[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; vr56 f1
} JG&`l{c9
int i1=l; oZ95)'L,
int i2=mid+1; opTDW)
for(int cur=l;cur<=r;cur++){ OQ"%(w>Hb
if(i1==mid+1) Ao)hb4ex
data[cur]=temp[i2++]; 1L1_x'tT%
else if(i2>r) =$601r
data[cur]=temp[i1++]; p%e!&:!
else if(temp[i1] data[cur]=temp[i1++]; S W(h%`U
else 0-cqux2U
data[cur]=temp[i2++]; 1\1a;Q3W%,
} -e7|DXj
} Knsb`1"E^6
^c{}G<U^
} O-B~~$g
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改进后的归并排序: `EVTlq@<
@!6eRp>Z
package org.rut.util.algorithm.support; c 2j?<F1
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import org.rut.util.algorithm.SortUtil; D3Lu]=G
d{+H|$L`
/** `84pql,
* @author treeroot -'+|r]
* @since 2006-2-2 b $x<7l5C
* @version 1.0 @ fm\ H
*/ jQ.]m
public class ImprovedMergeSort implements SortUtil.Sort { +aRjJ/*
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private static final int THRESHOLD = 10; <b"ynoM.A
P;0tI;
/* 1) V,>)Ak
* (non-Javadoc) 1;r^QAK&
* VaZ+TE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =MO2M~e!
*/ lM Gz"cym
public void sort(int[] data) { B'6^E#9
int[] temp=new int[data.length]; hk4f)z
mergeSort(data,temp,0,data.length-1); R-]QU`c
} _H@s^g
quk~z};R>\
private void mergeSort(int[] data, int[] temp, int l, int r) { Us.yKAHPV
int i, j, k; .E!7}O6
int mid = (l + r) / 2; )a,-Hc:Vz
if (l == r) jzV*V<
return; >U~.I2sz
if ((mid - l) >= THRESHOLD) p%Ae"#_X%
mergeSort(data, temp, l, mid); ZV}BDwOFI
else Pa2HFy2
insertSort(data, l, mid - l + 1); ~jAOGo/&6
if ((r - mid) > THRESHOLD) =BY)>0?z
mergeSort(data, temp, mid + 1, r); qT#+DDEAL
else f|Kd{ $VO
insertSort(data, mid + 1, r - mid); 65AXUTg
U,)Ngnd
for (i = l; i <= mid; i++) { _v4TyJ
temp = data; k\_>/)g
} W]5kM~Q@
for (j = 1; j <= r - mid; j++) { 5)V]qV$
temp[r - j + 1] = data[j + mid]; evsH>hE^
} ` _()R`=
int a = temp[l]; q:#,b0|bv
int b = temp[r]; D h]+HF
for (i = l, j = r, k = l; k <= r; k++) { $1oU^VY
if (a < b) { ]+)z}lr8 C
data[k] = temp[i++]; N%6jZmKip
a = temp; %*OKhrM
} else { E*IkI))X0
data[k] = temp[j--]; mJewUc!<5
b = temp[j]; V S2p"0$3D
} ,HS\(Z
} 1YR;dn
} H? N!F7s
]7zDdI|
/** &q1(v3cOO
* @param data cRz7.9-<
* @param l 5R4h9D5
* @param i $=iz&{9
*/ UV)[a%/SB&
private void insertSort(int[] data, int start, int len) { =Y|TShKk
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); U6FM`w<
} l3n* b6
} C]*9:lK
} lW'6rat
} (Z.K3
K]zBPfx
堆排序： ^mFuZ~g;?
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package org.rut.util.algorithm.support; ?PiJ7|
VZYdCZ&l7
import org.rut.util.algorithm.SortUtil; a}#[mw@m=
<VB
/** 'mpY2|]\$
* @author treeroot h+zJ"\
* @since 2006-2-2 $y\'j5nk3
* @version 1.0 t-dN:1
*/ JXBW0|8b
public class HeapSort implements SortUtil.Sort{ Q`g0g)3w
7~cN
/* (non-Javadoc) 9cFFQM|o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |U1X~\""
*/ &GwBxJ
public void sort(int[] data) { R`G%eG)+
MaxHeap h=new MaxHeap(); N<Rb<p%
h.init(data); /4RKA!W
for(int i=0;i h.remove(); ywmx6q4MFL
System.arraycopy(h.queue,1,data,0,data.length); N4!YaQQ;}
} 2uS&A \
3nd02:GF
private static class MaxHeap{ {#uX
TuwH?{ FzK
void init(int[] data){ o; 6\
this.queue=new int[data.length+1]; Po&gr@e.V
for(int i=0;i queue[++size]=data; $J[h(>-X
fixUp(size); &of%;>$>M
} Mp?Ev.
} m^U\l9LE
)8ctNpQt
private int size=0; b'Z#RIb
_.J{U0N
private int[] queue; y&lj+j
P\iw[m7O
public int get() { /+2^xEIjE
return queue[1]; @`k!7? Sq
} =Z2U
en!cu_]t
public void remove() { ,bmiIW%
SortUtil.swap(queue,1,size--); WXNJc
fixDown(1); nfy"M),et
} 8_U*_I7(
file://fixdown -}2q-
private void fixDown(int k) { ZNFn^iuQ
int j; q ]rsp0P2
while ((j = k << 1) <= size) { P_hwa1~d
if (j < size %26amp;%26amp; queue[j] j++; {#=q[jVi%1
if (queue[k]>queue[j]) file://不用交换 X)fj&
break; ub}t3#
SortUtil.swap(queue,j,k); A[XEbfDO
k = j; U;OJ.a9
} 2 'xT%
} *`ji2+4Sjw
private void fixUp(int k) { /4w&! $M-
while (k > 1) { |?V6__9
int j = k >> 1; T$GhE
if (queue[j]>queue[k]) r4Pm i
break; 3?Bq((
SortUtil.swap(queue,j,k); vwZ2kk!|i
k = j; n1DD+@
} n0@e%=H)I
} L\nWhmwl
$4>K2
} p:k>!8.Qho
O]m,zk
} 2<fG= I8
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SortUtil： -nN}8&l
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package org.rut.util.algorithm; VZb0x)w
l *yml
import org.rut.util.algorithm.support.BubbleSort; 1`5d~>fV
import org.rut.util.algorithm.support.HeapSort; AmRppbj/wO
import org.rut.util.algorithm.support.ImprovedMergeSort; Th`IpxV
import org.rut.util.algorithm.support.ImprovedQuickSort; oVb6,Pn
import org.rut.util.algorithm.support.InsertSort; ]^VC@$\)+
import org.rut.util.algorithm.support.MergeSort; hn)mNb!
import org.rut.util.algorithm.support.QuickSort; a5?Rj~h!<
import org.rut.util.algorithm.support.SelectionSort; Pf]6'?kQ
import org.rut.util.algorithm.support.ShellSort; 3VB{Qj
$eX; 2
/** 0#G&8*FMN
* @author treeroot m-5Dbx!j
* @since 2006-2-2 zYYc#N/
* @version 1.0 +x-n,!(
*/ 477jS6^e&
public class SortUtil { j?g{*M
public final static int INSERT = 1; wCkhE,#-_
public final static int BUBBLE = 2; JDD(e_dw
public final static int SELECTION = 3; dW,$yH_
public final static int SHELL = 4; j*q]-$2E
public final static int QUICK = 5; p/cVQ
public final static int IMPROVED_QUICK = 6; op"RrZAZBT
public final static int MERGE = 7; My:wA;#
public final static int IMPROVED_MERGE = 8; v#(wc+[
public final static int HEAP = 9; N#6&t8;kTC
2y,NT|jp
public static void sort(int[] data) { mj%Iow.
sort(data, IMPROVED_QUICK); }Wn6r_:
} ?#rDoYt/Sx
private static String[] name={ $wdIOfaH
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :a0qm.EN
}; hCc_+/j|
CcLP/
private static Sort[] impl=new Sort[]{ x>!#8?-h
new InsertSort(), n$axqvG
new BubbleSort(), PLw;9^<
new SelectionSort(), p(v+j_ak
new ShellSort(), ^E{~{
new QuickSort(), \H*"UgS
new ImprovedQuickSort(), @Ej{sC!0T
new MergeSort(), z./u;/:
new ImprovedMergeSort(), #Ji&.T^U/
new HeapSort() ]GJIrtS4
}; SH<Nt[8C
#QXB2x<*
public static String toString(int algorithm){ +K; X$kB
return name[algorithm-1]; tegLGp@_
} lmp0Ye|
mmu{K$9}I
public static void sort(int[] data, int algorithm) { *t3fbD
impl[algorithm-1].sort(data); 2J|Wbey
} _Sosw|A
}Rt?p8p
public static interface Sort { =sG C
public void sort(int[] data); B7fURL Rqr
} Z<0M_q9?MO
'eLO#1Ipf
public static void swap(int[] data, int i, int j) { U9SByqa1
int temp = data; b_|`jHes
data = data[j]; >(|T]u](q
data[j] = temp; WDP$w(M
} t1 OnA#]/_
} *<i { Mb Q