[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; zn ?;>Bl
} c9uT`h
int i1=l; !~N4}!X3du
int i2=mid+1; N &[,nUd
for(int cur=l;cur<=r;cur++){ rc$!$~|I3Z
if(i1==mid+1) 6}T%m?/}
data[cur]=temp[i2++]; W|#ev*'F
else if(i2>r) ~8m>DSs)D
data[cur]=temp[i1++]; 1D[P\r-
else if(temp[i1] data[cur]=temp[i1++]; T{<@MK%],d
else ?66(t
data[cur]=temp[i2++]; B-~&6D,
} -k <9v.:
} !ix<|F5
IOkC[([
} l>UUaf|O
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改进后的归并排序: 0Mu8ZVI{
o$ce1LO?|N
package org.rut.util.algorithm.support; KF_Wu}q d
1bJ]3\
import org.rut.util.algorithm.SortUtil; ~snF20
PS(j)I3
/** S9NN.dKu
* @author treeroot m_$I?F0
* @since 2006-2-2 +qj*P9
* @version 1.0 EOX_[ek7
*/ 06^1#M$'
public class ImprovedMergeSort implements SortUtil.Sort { j 3MciQ`
@pGlWw9*
private static final int THRESHOLD = 10; uT}TSwgp
b3b~T]]
/* 6rQpK&Jx
* (non-Javadoc) egvy#2b@
* &@HNz6KO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X^D9)kel
*/ +%Yc4
public void sort(int[] data) { mp,e9Nd;
int[] temp=new int[data.length]; 7_40_kwJi
mergeSort(data,temp,0,data.length-1); f4k5R
} ;(Xe@OtW
dA} 72D?
private void mergeSort(int[] data, int[] temp, int l, int r) { Dw`m>'J0
int i, j, k; 0O#B'Uu
int mid = (l + r) / 2; R==cz^#
if (l == r) v"r9|m~'
return; 0R}Sw[M.
if ((mid - l) >= THRESHOLD) pTALhj#,
mergeSort(data, temp, l, mid); Ww96|m
else ,![Du::1
insertSort(data, l, mid - l + 1); ZJ9Jf2 c
if ((r - mid) > THRESHOLD) ,B%fjcn
mergeSort(data, temp, mid + 1, r); VL7S7pb_
else C5+`<
insertSort(data, mid + 1, r - mid); So=nB} b[?
oKYhE
for (i = l; i <= mid; i++) { aw/7Z`
temp = data; @mx$sNDkL
} \$'m^tVU
for (j = 1; j <= r - mid; j++) { 7y)=#ZG'R
temp[r - j + 1] = data[j + mid]; *1W,Mzg
} 7<:Wq=e!r
int a = temp[l]; 3_MS'&M
int b = temp[r]; V[Rrst0yo
for (i = l, j = r, k = l; k <= r; k++) { +lW}ixt
if (a < b) { adI!W-/R:
data[k] = temp[i++]; 8pPC 9ew\=
a = temp; ^.#X<8hr
} else { 3kiE3*H
data[k] = temp[j--]; 9Yl8ndP^E
b = temp[j]; /S]:dDY9K
} [vWkAJ'K
} `pi-zE)
} )[^y t0%
\- =^]]b=
/** sm;E2BR$ `
* @param data QtY hg$K3
* @param l `~_H=l9{
* @param i S,9NUt
*/ %i$M/C"(
private void insertSort(int[] data, int start, int len) { i Y*o;z,~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); U|J$?aFDr
} ])V2}gH
} *:\:5*SY
} GsIwY {d
} DB`$Ru@
tL~,ZCQz
堆排序： E-)VPZ1D
" ^HK@$
package org.rut.util.algorithm.support; ]$~Fzs
_ktK+8*6`
import org.rut.util.algorithm.SortUtil; zb;(?!Bd#
Q(|PZng
/** =#i4MXRZ{
* @author treeroot 2W3NL|P
* @since 2006-2-2 VYamskK[G:
* @version 1.0 !%c{+]g
*/ o_Jn_3=
public class HeapSort implements SortUtil.Sort{ v/R[?H)
b0@>xT
/* (non-Javadoc) .tRr?*V|l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ot`LZ"H:
*/ fvcW'T}r
public void sort(int[] data) { {f+N]Oo*
MaxHeap h=new MaxHeap(); ME$2P!o
h.init(data); A*8m8Sh$
for(int i=0;i h.remove(); yo\N[h7
System.arraycopy(h.queue,1,data,0,data.length); EBoGJ_l
} 7/H^<%;y
fJN*s
private static class MaxHeap{ 1,"I=
~+O`9&
void init(int[] data){ ZV'$k\
this.queue=new int[data.length+1]; Rx6l|'e
for(int i=0;i queue[++size]=data; TB7>s~)47E
fixUp(size); %G;0T;0L
} k"xGA*B|
} Ih.rC>)rx
@$qOW
private int size=0; z`k El@
No`|m0 :j
private int[] queue; .sM<6;
d<Ggw#}:m
public int get() { C:`;d&d
return queue[1]; 'yp>L|
} 60!1D>,
;LCTCt`
public void remove() { *cbeyB{E
SortUtil.swap(queue,1,size--); e`i7ah;
fixDown(1); CSMeSPOm]
} KH7VR^;mk
file://fixdown qysTjGwa]
private void fixDown(int k) { iI5+P`sE&J
int j; s\[LpLt
while ((j = k << 1) <= size) { KZ=u54
if (j < size %26amp;%26amp; queue[j] j++; &+ KyPY+
if (queue[k]>queue[j]) file://不用交换 t3PtKgP-6
break; d1v<DU>M
SortUtil.swap(queue,j,k); L}'Yd'
k = j; &&=[Ivv
} Cye T]y
} 4/S=5r}
private void fixUp(int k) { UMV)wy|j
while (k > 1) { @;vNX*-J
int j = k >> 1; lT2 4JhJ#
if (queue[j]>queue[k]) M)&Io6>
break; w|IjQ1{
SortUtil.swap(queue,j,k); veeI==]
k = j; WRWWskP
} xwRhs!`t1
} 9lf*O0Z&n
U-i.(UyZ
} vT|`%~Be
JB3"EFv
} (n,u|}8Y
4({(i
SortUtil： XZ`:wmc|
3jjMY
package org.rut.util.algorithm; f-Jbs`(+
)qL&%xz
import org.rut.util.algorithm.support.BubbleSort; A{# Nwd>
import org.rut.util.algorithm.support.HeapSort; !/`$AXO
import org.rut.util.algorithm.support.ImprovedMergeSort; VYZU eh
import org.rut.util.algorithm.support.ImprovedQuickSort; r9# \13-
import org.rut.util.algorithm.support.InsertSort; bLzs?eos
import org.rut.util.algorithm.support.MergeSort; Mi+H#xx16
import org.rut.util.algorithm.support.QuickSort; +#2)kg 9_
import org.rut.util.algorithm.support.SelectionSort; ~ 3^='o
import org.rut.util.algorithm.support.ShellSort; Z$p0&~
,apNwkY
/** `K*b?:0lp
* @author treeroot .N,&Uv-
* @since 2006-2-2 "-31'R-
* @version 1.0 UiH!Dl}<
*/ cvnB!$eji
public class SortUtil { %Y]=1BRk}
public final static int INSERT = 1; w~z[wmOkp
public final static int BUBBLE = 2; #2RiLht
public final static int SELECTION = 3; /kgeV4]zR
public final static int SHELL = 4; G O{.9_2
public final static int QUICK = 5; (a@?s$LG
public final static int IMPROVED_QUICK = 6; W+Xz$j/u
public final static int MERGE = 7; |?d#eQ9a
public final static int IMPROVED_MERGE = 8; #sTEQjJ,J
public final static int HEAP = 9; 5c5oSy+
pd3,pQ
public static void sort(int[] data) { K*q[(,9
sort(data, IMPROVED_QUICK); u7fK1 ^O
} S${Zzt"
private static String[] name={ 7Ym(n8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "5C`,4s
}; ?-MP_9!JK
ZE?f!ifp
private static Sort[] impl=new Sort[]{ ~gE:-
new InsertSort(), -`+<{NHv\
new BubbleSort(), L[g0&b%%-
new SelectionSort(), &;E5[jO^D
new ShellSort(), >5hhd38
new QuickSort(), YAVy9$N-
new ImprovedQuickSort(), W=JAq%yd<
new MergeSort(), ?m7:if+y
new ImprovedMergeSort(), ujFzJdp3k
new HeapSort() s&a1y~rv
}; Aw5pd7qKL
oR .cSGh
public static String toString(int algorithm){ b| M3`
return name[algorithm-1]; J-xS:Ha'l
} yF13Of^l./
:O-iykXyI
public static void sort(int[] data, int algorithm) { :kMHRm@{
impl[algorithm-1].sort(data); (xl\J/
} d>0+A)6>
fB1TFtAh
public static interface Sort { KS}hU~
public void sort(int[] data); ^/U27B
} ke_[
`'I{U5;e
public static void swap(int[] data, int i, int j) { q%(EYM5Y
int temp = data; m8R9{LC
data = data[j]; \Q~8?p+
data[j] = temp; vb Y3;+M>
} 6e,xDr
} .IarkeCtb