[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; 0,{Dw9W:
} j"7 z
int i1=l; L Lm{:T7
int i2=mid+1; ]+{Cy\*kR
for(int cur=l;cur<=r;cur++){ bo4 :|Z
if(i1==mid+1) ebcGdC/%>
data[cur]=temp[i2++]; bBb$0HOF
else if(i2>r) O sbY}*S
data[cur]=temp[i1++]; uL1e?
else if(temp[i1] data[cur]=temp[i1++]; ]4@_KKP
else 1}}.e^Tsfr
data[cur]=temp[i2++]; Ot`jjZ&
} GTyS8`5E*
} :w_Zr5H]
mpIRe@#Z
} %e+hM $Q
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改进后的归并排序: ![18+Q\
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package org.rut.util.algorithm.support; C7[_#1Oz
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import org.rut.util.algorithm.SortUtil; 1>[3(o3t
x}?y@.sn8
/** cO.U*UTmX
* @author treeroot y4tM0h
* @since 2006-2-2 G!C2[:[g
* @version 1.0 f nX!wN
*/ Kzb&aOw
public class ImprovedMergeSort implements SortUtil.Sort { b54<1\&
?kI-o0@O.
private static final int THRESHOLD = 10; @TdPeTw\
Ks(+['*S
/* . Zrt/;
* (non-Javadoc) dP=1*
* _>9|"seR
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) - /]ro8V$
*/ .9#4qoM'
public void sort(int[] data) { xa[<k>r3
int[] temp=new int[data.length]; (_^g:>)Cs
mergeSort(data,temp,0,data.length-1); hc4<`W{
} V<$g^Vb
vRpMZ)e
private void mergeSort(int[] data, int[] temp, int l, int r) { MRwls@z=
int i, j, k; <x,u!}5J
int mid = (l + r) / 2; nU-.a5
if (l == r) H[wJ; l
return; Qx1ZxJz #
if ((mid - l) >= THRESHOLD) cpF\^[D
mergeSort(data, temp, l, mid); '>^+_|2
else ?}e8g
insertSort(data, l, mid - l + 1); [=z1~dXKb
if ((r - mid) > THRESHOLD) B$1e AwT9
mergeSort(data, temp, mid + 1, r); o3P`y:&
else 2 :u4~E3
insertSort(data, mid + 1, r - mid); 22"M#:r$
f ?_YdVZ
for (i = l; i <= mid; i++) { ^o+2:G5z}
temp = data; bHH{bv~Z
} *6sB$E_y
for (j = 1; j <= r - mid; j++) { " ;_bB"q*
temp[r - j + 1] = data[j + mid]; hZ Gr/5f
} T^B&GgW
int a = temp[l]; p+SFeUp
int b = temp[r]; }{[H@uhjH
for (i = l, j = r, k = l; k <= r; k++) { IsxPm9P2<
if (a < b) { (cAv :EKpo
data[k] = temp[i++]; +Pd&YfU9
a = temp; _A|1_^[G(
} else { z6#N f,
data[k] = temp[j--]; eS8tsI
b = temp[j]; z9}rT<hy
} LzB)o\a
} ]:(>r&'
} :WIbjI=
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/** =24)`Lyb
* @param data TOdH
* @param l .7++wo!,
* @param i "#z4
*/ ck>|p09q'9
private void insertSort(int[] data, int start, int len) { 5V!L~#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); TS^(<+'
} jz QmYcd
} 7}(wEC
} lEIX,amwa
} ](a*R
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堆排序： A8&yB;T$y
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package org.rut.util.algorithm.support; $9Hod-Z1
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import org.rut.util.algorithm.SortUtil; 9:4PJ%R9
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/** ^)<>5.%1''
* @author treeroot &&4av*\I
* @since 2006-2-2 [7q~rcf,Z
* @version 1.0 Ap9CQ h=!
*/ B;XFPQ#b
public class HeapSort implements SortUtil.Sort{ 4j|]=58
fIN8::Cs[
/* (non-Javadoc) rpu9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M>P-0IC
*/ ;ZPAnd:pb
public void sort(int[] data) { IE.JIi^w
MaxHeap h=new MaxHeap(); d!7cIYVZ
h.init(data); KT~J@];Fb
for(int i=0;i h.remove(); %Ez%pT0TQ#
System.arraycopy(h.queue,1,data,0,data.length); O|m-Uz"+
} 3.U5Each-
A\ds0dUE
private static class MaxHeap{ !;.i#c_u
} R!-*Wk
void init(int[] data){ 8fFURk
this.queue=new int[data.length+1]; #qWa[kB
for(int i=0;i queue[++size]=data; /s.sW l
fixUp(size); ?1?D[7$
} 9-[g/qrF
} nF0$
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private int size=0; zD}dvI}
"P\k_-a'
private int[] queue; Y,I0o{,g
jJdw\`
public int get() { 7].tt
return queue[1]; a97A{7I&
} [_*%
PeEf=3
public void remove() { :]iV*zo_
SortUtil.swap(queue,1,size--); B;9X{"
fixDown(1); s`GwRH<#
} *2N$l>ql:k
file://fixdown \gaGTc2&
private void fixDown(int k) { %>`0hk88
int j; YQe9g>G&
while ((j = k << 1) <= size) { Rd|};-
if (j < size %26amp;%26amp; queue[j] j++; GV#"2{t j
if (queue[k]>queue[j]) file://不用交换 O&!>C7
break; S~0 mY} m
SortUtil.swap(queue,j,k); 5jD2%"YUV
k = j; =Y#)c]`
} %$|=_K)Ks
} }+G6`Zd
private void fixUp(int k) { NF&R}7L
while (k > 1) { gd^1c}UZX
int j = k >> 1; )D_#
if (queue[j]>queue[k]) ,!_$A}@0 ^
break; f?kA,!
SortUtil.swap(queue,j,k); RX}6H<5R
k = j; VeeQmR?u-
} Tu95qL~^
} \72(d
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} bDVz+*bU}
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} 0G ^73Z
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SortUtil： LPX@oha
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package org.rut.util.algorithm; *t.L` G
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import org.rut.util.algorithm.support.BubbleSort; /=&HunaxI
import org.rut.util.algorithm.support.HeapSort; 7.-Q9xv
import org.rut.util.algorithm.support.ImprovedMergeSort; f{MXH&d 1\
import org.rut.util.algorithm.support.ImprovedQuickSort; ,<s'/8Ik
import org.rut.util.algorithm.support.InsertSort; [t/7hx"2t
import org.rut.util.algorithm.support.MergeSort; AeR3wua
import org.rut.util.algorithm.support.QuickSort; ce-5XqzY@
import org.rut.util.algorithm.support.SelectionSort; Q$Qs$
import org.rut.util.algorithm.support.ShellSort; 'D(|NYY
H+y(W5|2/X
/** 2Sbo7e
* @author treeroot kaf4GME]
* @since 2006-2-2 xU+c?OLi
* @version 1.0 <|9s{z
*/ `6;%HbP$W+
public class SortUtil { >utm\!Gac
public final static int INSERT = 1; INqD(EG
public final static int BUBBLE = 2; KR4X&d6
public final static int SELECTION = 3; B|U*2|e
public final static int SHELL = 4; [F{q.mZj
public final static int QUICK = 5; $\?BAkx
public final static int IMPROVED_QUICK = 6; ew -5VL
public final static int MERGE = 7; Y1?wf.
public final static int IMPROVED_MERGE = 8; NF+^
public final static int HEAP = 9; ?CIMez(h
vpu20?E>5z
public static void sort(int[] data) { FJJ+*3(
sort(data, IMPROVED_QUICK); _tDSG]
} a<-NB9o~v
private static String[] name={ 3p`*'j2R
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7qj<|US
}; 21i?$ uU
cnJ(Fv_F$
private static Sort[] impl=new Sort[]{ &?C% -"|c
new InsertSort(), s<,[xkMB
new BubbleSort(), mTXeIng?
new SelectionSort(), tmEF7e`(o
new ShellSort(), &U/7D!^X
new QuickSort(), W(U:D?e
new ImprovedQuickSort(), 7 -yf
new MergeSort(), pv);LjF
new ImprovedMergeSort(), {"hX_t
new HeapSort() KY 085Fvs
}; #rnO=N8
5#kN<S!
public static String toString(int algorithm){ *9.4AW~]X
return name[algorithm-1]; x9S~ns+r
} L-Qc[L
s/#L?[YH
public static void sort(int[] data, int algorithm) { Zn{,j0;
impl[algorithm-1].sort(data); &`"Q*N2{
} iV<4#aBg
1_$ybftS
public static interface Sort { _0^f
public void sort(int[] data); %%`Q5I
} /J{ e_a
sk*AlSlM
public static void swap(int[] data, int i, int j) { j6x1JM
int temp = data; /6)6
data = data[j]; Yzo_ZvL
data[j] = temp; &ru2&Sz
} 0 _4p>v:
} k~ Z9og