[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; 1o5DQ'~n
} 6n9;t\'Gt
int i1=l; -P!_<\q\l
int i2=mid+1; d0(GE4+/
for(int cur=l;cur<=r;cur++){ 7bBOV(/s
if(i1==mid+1) q0Rd^c
data[cur]=temp[i2++]; -]=-IiC#
else if(i2>r) rN3i5.*/t
data[cur]=temp[i1++]; sDV*k4
else if(temp[i1] data[cur]=temp[i1++]; utk'joo
else Vg1! u+`<
data[cur]=temp[i2++]; _ PC}`Y'&
} =Rnx!E
} Al?LO;$Pa?
s^nPSY!
} ni @Mqb
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改进后的归并排序: 6*@\Qsp615
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package org.rut.util.algorithm.support; mG,%f"b0
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import org.rut.util.algorithm.SortUtil; w3j51v` 0'
Z,~"`9>Ss
/** pPztUz/.
* @author treeroot `_L=~F8
* @since 2006-2-2 6 isz
* @version 1.0 ~r`~I"ZK7^
*/ f@roRn8p?
public class ImprovedMergeSort implements SortUtil.Sort { XxT7YCi
Bsm>^zZ`YU
private static final int THRESHOLD = 10; $)OUOv
h'8w<n+%)
/* 7Gb(&'n
* (non-Javadoc) s(yVE
* 5gpqN)|)[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /$OX'L&b
*/ Kgi| 7w
public void sort(int[] data) { @ucN|r}=R
int[] temp=new int[data.length]; bI^zwK,@4
mergeSort(data,temp,0,data.length-1); ?Z}n0E `
} j\w>}Pc
:P$I;YY=A
private void mergeSort(int[] data, int[] temp, int l, int r) { 5H_%inWM
int i, j, k; 'TPRGX~&
int mid = (l + r) / 2; ?L|Jc_E
if (l == r) +cAN4
return; kqYvd]ss
if ((mid - l) >= THRESHOLD) ,WF)GS|7V
mergeSort(data, temp, l, mid); _#c^z;!
else 4uip!@$K
insertSort(data, l, mid - l + 1); &JoMrcEZ
if ((r - mid) > THRESHOLD) 5BKmp-m
mergeSort(data, temp, mid + 1, r); y%T5"p$,
else {b@rQCre7
insertSort(data, mid + 1, r - mid); amI$0
&lYKi3}x
for (i = l; i <= mid; i++) { Ov{fO
temp = data; bTzVmqGY
} 1m-"v:fT5D
for (j = 1; j <= r - mid; j++) { lu@#)
temp[r - j + 1] = data[j + mid]; H~~I6D{8
} Ty]/F+{
int a = temp[l]; C~M~2@Iori
int b = temp[r]; ?i4}[q
for (i = l, j = r, k = l; k <= r; k++) { 06bl$%
if (a < b) { +4emkDTdR
data[k] = temp[i++]; U4#[>*
a = temp; x>Ah4ad
} else { \K 01F
data[k] = temp[j--]; g j`"|
b = temp[j]; dG{`Jk
} pk'@!|g%=
} w $7J)ngA9
} ?U0iHg{
x q93>Hs
/** 6l#1E#]|
* @param data fSp(}'m2L
* @param l 3mn0
* @param i JWG7QH
*/ pt8X.f,iA
private void insertSort(int[] data, int start, int len) { zx\N^R;Jq
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :>lica_
} v>Il#
} |dNtM^
} ZNPzQ:I@
} x_Ki5~w5
:=04_5 z
堆排序： 8eP2B281
xJ9_#$ngeM
package org.rut.util.algorithm.support; Ms?V1
RVfRGc^lK
import org.rut.util.algorithm.SortUtil; S[UHx}.
{Ny\9r
/** &)Z8Qu
* @author treeroot yz-IZt(
* @since 2006-2-2 sZ-]yr\E"
* @version 1.0 =S@$"_&
*/ kP%W:4l0
public class HeapSort implements SortUtil.Sort{ ua:.97~Ym
G*BM'^0+
/* (non-Javadoc) ~nb%w?vv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6__@?XzJ
*/ qce#
public void sort(int[] data) { 8 Oeg"d
MaxHeap h=new MaxHeap(); TMG:fg&E~
h.init(data); C5Q|3d
for(int i=0;i h.remove(); #I@]8U#,":
System.arraycopy(h.queue,1,data,0,data.length); (~pcPGUG
} ]^gD@].
}M/w 0U0o
private static class MaxHeap{ w0~iGr}P
k`js~/Xv
void init(int[] data){ 0[D5]mcv
this.queue=new int[data.length+1]; ;JFE7\-mC
for(int i=0;i queue[++size]=data; NpD}7t<EF
fixUp(size); GT%V,OJ
} MvY0?!v
} U=XaI%ZM)
*D<S \6=
private int size=0; LF%1)x
!N,Z3p>Q
private int[] queue; 5 LX3.
z$G?J+?J
public int get() { p%IR4f
return queue[1]; >^:g[6Sj
} nAF@47Wo
v\-"NHl
public void remove() { sNvT0
SortUtil.swap(queue,1,size--); O( he
fixDown(1); ~B(]0:
} d5A!kU _.
file://fixdown Z;S*fS-_
private void fixDown(int k) { Z/wh?K3y
int j; Dr`\
while ((j = k << 1) <= size) { &t%CuU]/@
if (j < size %26amp;%26amp; queue[j] j++; B<1*p,z
if (queue[k]>queue[j]) file://不用交换 `1EBnL_1
break; ~J<bwF
SortUtil.swap(queue,j,k); O%o#CBf0
k = j; NG'VlT
} ErESk"2t
} EFql g9bK
private void fixUp(int k) { ?xQlX%&`6
while (k > 1) { d?N"NqaN
int j = k >> 1; kTiQO2H
if (queue[j]>queue[k]) @hzQk~Gdi
break; `4}!+fXQ
SortUtil.swap(queue,j,k); 'VJMi5Y(-
k = j; HC{|D>x.
} ]Jnf.3
} YGWb!|Z$
T]^F%D%
} ?qO,=ms>-
YfMe69/0I
} hQL9 Zl~
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SortUtil： :VN<,1s9p^
Od&M^;BQ
package org.rut.util.algorithm; $+Pv fQ
a m<R!(
import org.rut.util.algorithm.support.BubbleSort; =~=/ dq
import org.rut.util.algorithm.support.HeapSort; $elrX-(vL
import org.rut.util.algorithm.support.ImprovedMergeSort; R8'yQ#FVy
import org.rut.util.algorithm.support.ImprovedQuickSort; {Y/|7Cl0
import org.rut.util.algorithm.support.InsertSort; eU%5CVH.v
import org.rut.util.algorithm.support.MergeSort; n[4Nu`E9
import org.rut.util.algorithm.support.QuickSort; CPVKz
import org.rut.util.algorithm.support.SelectionSort; VdeK~#k
import org.rut.util.algorithm.support.ShellSort; $#RD3#=?u
j%p~.kW5
/** rG\m]C3E
* @author treeroot CzvlZDo
* @since 2006-2-2 m/eGnv;!
* @version 1.0 On'3K+(_
*/ s=%HTfw
public class SortUtil { Vj2GK"$v
public final static int INSERT = 1; r`;C9#jZ
public final static int BUBBLE = 2; Z$ftG7;P0
public final static int SELECTION = 3; g~B@=R
public final static int SHELL = 4; +W;B8^imG
public final static int QUICK = 5; vhL&az
public final static int IMPROVED_QUICK = 6; ^F"*;8$
public final static int MERGE = 7; G0Wd"AV+
public final static int IMPROVED_MERGE = 8; zl: u@!'
public final static int HEAP = 9; izC>-
LpmspIPvf
public static void sort(int[] data) { 9d{W/t?NH
sort(data, IMPROVED_QUICK); =k$d8g ez
} 7_K(xmK
private static String[] name={ tjd"05"@:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" vj^UF(X
}; ZH0f32K
N!h>fE`
private static Sort[] impl=new Sort[]{ N"T8 Pt
new InsertSort(), Q?"[zX1
new BubbleSort(), u^]yz&9V
new SelectionSort(), p +T&9
new ShellSort(), D~?kvyJ
new QuickSort(), %I.{umU
new ImprovedQuickSort(), mefmoZ
new MergeSort(), i;xg[e8.
new ImprovedMergeSort(), Nl_;l
new HeapSort() j}VOr >xz
}; ^m+W
,gOQIS56
public static String toString(int algorithm){ ;etQ
return name[algorithm-1]; ttsB'|ps
} 8uT6QCf
_yoG<qI
public static void sort(int[] data, int algorithm) { BphF+'CM
impl[algorithm-1].sort(data); I"!gzI`Sd
} OeAPBhTmFj
z9+94<J
public static interface Sort { /y!Vs`PZ!
public void sort(int[] data); >bZ#
} OK)0no=OAK
b?Jm)
public static void swap(int[] data, int i, int j) { YpKai3 B
int temp = data; <+$S{Z.
data = data[j]; A;|DQR()
data[j] = temp; u!-eP7;7
} P\AH9#XL
} c:6w >: