[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; Hq "l`
} I=&Kn@^
int i1=l; 9l}G{u9a
int i2=mid+1; +P;&/z8i*g
for(int cur=l;cur<=r;cur++){ Z1oUAzpj4
if(i1==mid+1) +D|E8sz8
data[cur]=temp[i2++]; ^(1S`z$
else if(i2>r) w~WW2w
data[cur]=temp[i1++]; (r"2XXR
else if(temp[i1] data[cur]=temp[i1++]; {'[S.r`
else fk(h*L|sI
data[cur]=temp[i2++]; YFs!,fw'
} w7yz4_:x^
} %#@5(_'
.a `ojT
} >jpkR
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改进后的归并排序: _rvO#h
NSQ#\:3:S
package org.rut.util.algorithm.support; tQcn%CK
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import org.rut.util.algorithm.SortUtil; <6!/B[!O=
X5c)T}pyv
/** 3zo:)N\K
* @author treeroot WXCZ }l
* @since 2006-2-2 | gP%8nh'C
* @version 1.0 +%LR1+/%b
*/ G*rlU
public class ImprovedMergeSort implements SortUtil.Sort { 1g_Dkv|D
y!jq!faqt
private static final int THRESHOLD = 10; MLt'tzgl
n{xL1A=9
/* yIma7H@=L
* (non-Javadoc) CG[04y
* T&s}~S=m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _#TbOfu
*/ d2Ox:| <)
public void sort(int[] data) { Q ;$NDYV1
int[] temp=new int[data.length]; NnqAr ,
mergeSort(data,temp,0,data.length-1); &v<Am%!N
} YH'j"|{
'*n2<y
private void mergeSort(int[] data, int[] temp, int l, int r) { )jed@?
int i, j, k; _Wgpk0
int mid = (l + r) / 2; Bngvm9k3
if (l == r) CL<m+dW%*
return; xc_-1u4a9
if ((mid - l) >= THRESHOLD) TV*@h2C"i
mergeSort(data, temp, l, mid); E{}Vi>@V?
else Qk`LBvg1
insertSort(data, l, mid - l + 1); 4pZ=CB+j
if ((r - mid) > THRESHOLD) 2t`d.s=
mergeSort(data, temp, mid + 1, r); R![4|FR
else >2dF^cDE-3
insertSort(data, mid + 1, r - mid); ==Bxv:6
,_RPy2N
for (i = l; i <= mid; i++) { :x36Z4:
temp = data; =;y(b~
} xaW9Sj0ZM
for (j = 1; j <= r - mid; j++) { Qs;MEt1
temp[r - j + 1] = data[j + mid]; QLOcgU^
} Q'Vejz/
int a = temp[l]; [.c'22R6
int b = temp[r]; >IE`, fe
for (i = l, j = r, k = l; k <= r; k++) { dmk_xBy s|
if (a < b) { >PONu]^
data[k] = temp[i++]; esK0H<]
a = temp; Ygfv?
} else { _p\O!y
data[k] = temp[j--]; #w&N) c>
b = temp[j]; %S]g8O[}nl
} wv&#lM(
} V25u_R`{
} p _q]Rt
c<]~q1
/** S)vNWBO
* @param data =SLCG.
* @param l hO0g3^
* @param i G~KYFNHr
*/ tW}At
private void insertSort(int[] data, int start, int len) { Kzrt%DA
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); L5A?9zum/!
} Rg~F[j$N
} m!_*Q
} DE" Y(;S
} ?`U=Ps
j=n<s</V
堆排序： 9y(491"o
R&9Q#n-
package org.rut.util.algorithm.support; !\/J|~XZ
G2!J`}
import org.rut.util.algorithm.SortUtil; eD?f|bif
&AhkP=Yw
/** zHk7!|%Y
* @author treeroot TI}Y U
* @since 2006-2-2 q@Oe}
* @version 1.0 *PF=dx<8
*/ c@/K}
public class HeapSort implements SortUtil.Sort{ g<PglRr"
m+9~f_}
/* (non-Javadoc) s|d"2w6t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vmIt!x
*/ Rxk0^d:sNi
public void sort(int[] data) { i;mA|
MaxHeap h=new MaxHeap(); H?tX^HO:q
h.init(data); .+$ox-EK8
for(int i=0;i h.remove(); H/N4tWk"
System.arraycopy(h.queue,1,data,0,data.length); 5:|=/X%#qp
} RGy+W-
m\e?'-(s
private static class MaxHeap{ -mY,nMDb
8KHT"uc'*J
void init(int[] data){ aYws{Vii
this.queue=new int[data.length+1]; @t4OpU<'*b
for(int i=0;i queue[++size]=data; C9L_`[9DO
fixUp(size); %2^wyVkq:
} ?OF9{$m3?
} =U,mzY(
yrQfPR
private int size=0; W?X3 :1c9:
j-TRa,4bN
private int[] queue; #gSLFM{p
<Xl/U^B
public int get() { qUKSo9
return queue[1]; QZv}\C-c
} /[+%<5s
y{Vh?Z<E
public void remove() { SmVL?wf
SortUtil.swap(queue,1,size--); B<oBo&uA
fixDown(1); ,WtJ&S7?
} `/JuItL-
file://fixdown +~f=L- >
private void fixDown(int k) { 2./;i>H[u
int j; |ZtNCB5{^j
while ((j = k << 1) <= size) { rceX|i>9n
if (j < size %26amp;%26amp; queue[j] j++; ciGJtD&P
if (queue[k]>queue[j]) file://不用交换 Usq.'y/o
break; Q?/qQ}nNw
SortUtil.swap(queue,j,k); jj6yf.r6c
k = j; ch]{=61
} jH?!\F2)+
} M$UZn
private void fixUp(int k) { OU'm0Jlk
while (k > 1) { 5[Uv%A?H#_
int j = k >> 1; \h5!u1{L
if (queue[j]>queue[k]) Sjo7NR^#e
break; 5&TH\2u
SortUtil.swap(queue,j,k); {fa3"k_ke
k = j; P$5K[Y4f
} qB5.of[N!
} QJ2D C
':!aFMj^
} e-*-91D
~}RfepM
} y-N]{!
Fx )BMP
SortUtil： -Pc6W9$
tr|)+~x3
package org.rut.util.algorithm; _)[UartKx
3@\J#mR
import org.rut.util.algorithm.support.BubbleSort; #jM-XK
import org.rut.util.algorithm.support.HeapSort; odWK\e
import org.rut.util.algorithm.support.ImprovedMergeSort; P7\?WN$p
import org.rut.util.algorithm.support.ImprovedQuickSort; .FC|~Z1T<F
import org.rut.util.algorithm.support.InsertSort; \IZY\WU}2
import org.rut.util.algorithm.support.MergeSort; IR|#]en
import org.rut.util.algorithm.support.QuickSort; vKBijmE
import org.rut.util.algorithm.support.SelectionSort; I&;9
import org.rut.util.algorithm.support.ShellSort; AK(x;4
`k`P;(:
/** Y&-% N
* @author treeroot Uj)Wbe[)p0
* @since 2006-2-2 n&3}F?
* @version 1.0 GQ2/3kt
*/ ym_p49
public class SortUtil { tmi)LRF H
public final static int INSERT = 1; w|c200Is}e
public final static int BUBBLE = 2; _$i)bJ
public final static int SELECTION = 3; &yG5w4<
public final static int SHELL = 4; ^09-SUl^
public final static int QUICK = 5; Q2[;H!"
public final static int IMPROVED_QUICK = 6; yt<h!k$ _P
public final static int MERGE = 7; +`tk LvM
public final static int IMPROVED_MERGE = 8; 9_fbl:qk;\
public final static int HEAP = 9; p0hE`!
bE?X?[K
public static void sort(int[] data) { =YY 7V!
sort(data, IMPROVED_QUICK); -\n%K
} %`*On~
private static String[] name={ us+z8Mz
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" H*Tzw,f~ v
}; nF$HWp&gt
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private static Sort[] impl=new Sort[]{ ih-J{1
new InsertSort(), 2'u%
new BubbleSort(), fZrh_^yH
new SelectionSort(), LGK@taw^
new ShellSort(), _!,Ees=b
new QuickSort(), ^h^.;Iqr=
new ImprovedQuickSort(), in6*3C4
new MergeSort(), bEln.)
new ImprovedMergeSort(), o59b#9
new HeapSort() KwU;+=_.
}; SEVB.;
~LQzt@G4
public static String toString(int algorithm){ +lxjuEiae
return name[algorithm-1]; R3%%;`c=
} *wx95?H0Z
Jv}&8D
public static void sort(int[] data, int algorithm) { Ph8@V}80"Y
impl[algorithm-1].sort(data); 2M=h:::W
} :C2 @!W z
;cB3D3fR.
public static interface Sort { p6!5}dD(
public void sort(int[] data); t&Q(8Hz
} No`*->R
hZlHY9[t?
public static void swap(int[] data, int i, int j) { e;g7Ek3n
int temp = data; @S:T8 *~}
data = data[j]; FbRGfHL[
data[j] = temp; X9ZHYlr+Q
} tQas_K5
} [S1 b\f#