[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; |CZnq-,C
} |N=@E,33
int i1=l; VmOFX:j!,
int i2=mid+1; ,8xP8T~Kmv
for(int cur=l;cur<=r;cur++){ gR-Qj
if(i1==mid+1) 0n<(*bfW
data[cur]=temp[i2++]; (XG[_
else if(i2>r) ULNAH`{D
data[cur]=temp[i1++]; n:bB$Ai2
else if(temp[i1] data[cur]=temp[i1++]; [*?_
else Mi/ &$"=
data[cur]=temp[i2++]; ^0s\/qyqm
} io9xI3{
} Y0X"Zw
Bd[L6J)
} t;LX48TQ
x'M^4{4[
改进后的归并排序: hM36QOdm
s?@)a,C%k
package org.rut.util.algorithm.support; hLyTUt~\L
O+E1M=R6h
import org.rut.util.algorithm.SortUtil; /Oggt^S
1A?\BJ"
/** $@_<$t
* @author treeroot #j^('K|
* @since 2006-2-2 $/, BJ/9
* @version 1.0 ib(>vp$V
*/ YH'$_,8peM
public class ImprovedMergeSort implements SortUtil.Sort { Y3P.|
+-H}s`
private static final int THRESHOLD = 10; Vedyy\TU
jNe(w<',P
/* >&<<8Ln
* (non-Javadoc) tIGVB+g{F
* y^mWG1"O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d`9W
*/ XDpfpJ,z"}
public void sort(int[] data) { ]3O 4\o
int[] temp=new int[data.length]; ?~aZ#%*i8
mergeSort(data,temp,0,data.length-1); f=:3!k,S
} *t#s$Ga
zd*3R+>U'>
private void mergeSort(int[] data, int[] temp, int l, int r) { @,x_i8
int i, j, k; 49+ >f
int mid = (l + r) / 2; i\=z'
if (l == r) XMN?;Hj>
return; > $w^%I
if ((mid - l) >= THRESHOLD) {J,6iP{>ZN
mergeSort(data, temp, l, mid); b&lN%+%}
else 5q|+p?C
insertSort(data, l, mid - l + 1); :vc[/<
if ((r - mid) > THRESHOLD) vix&E`0yD
mergeSort(data, temp, mid + 1, r); dSOlD/c
else !;o\5x<'$O
insertSort(data, mid + 1, r - mid); .O5LI35,
AVXX\n\_
for (i = l; i <= mid; i++) { La"o)L +m_
temp = data; _\ .
} R*s* +I
for (j = 1; j <= r - mid; j++) { v!NB~"LQ
temp[r - j + 1] = data[j + mid]; Q~fwWp-J
} ! jbEm8bt
int a = temp[l]; iD>G!\&
int b = temp[r]; S5i+vUI8C
for (i = l, j = r, k = l; k <= r; k++) { `9.dgV
if (a < b) { (Ij0AeJ#
data[k] = temp[i++]; |h5kg<Zgo
a = temp; ;yF[2P ;
} else { Wgxn`6
data[k] = temp[j--]; I"Q#IvNw
b = temp[j]; a @6^8B?w;
} oi7 3YOB
} 'oleB_B
} 1#grB(p?
>|wKXz
/** "XCU'_k=
* @param data 12idM*
* @param l tf4*R_6;1$
* @param i Y4QLs^IdB
*/ *"1~bPl
private void insertSort(int[] data, int start, int len) { bfFmTI$,
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); sz'p3
} @u,+F0Yd
} :@.C4oq
} r)VLf#3B
} )))2fskZ
h~ $&
堆排序： f%c06Un=
A:/}`
package org.rut.util.algorithm.support; d!o.ASL{
z1F9$^
import org.rut.util.algorithm.SortUtil; =(%*LY!Xc
|VK:2p^ u
/** DB#$~(o
* @author treeroot PC|'yAN:
* @since 2006-2-2 tyB)HF
* @version 1.0 [q'eENG
*/ 0A.PD rM:
public class HeapSort implements SortUtil.Sort{ !Q!&CG5l
V{!lk]p}a
/* (non-Javadoc) =nzFd-P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m$?.Yig?
*/ {ih:FcI
public void sort(int[] data) { F=srkw:*.
MaxHeap h=new MaxHeap(); EJ G2^DSS
h.init(data); T8U[xu.>
for(int i=0;i h.remove(); _ \l HI
System.arraycopy(h.queue,1,data,0,data.length); 0 sZwdO
} .:8[wI_f
bhYU5I 9
private static class MaxHeap{ wazP,9W?
>PIPp7C
void init(int[] data){ !3h{lEB
this.queue=new int[data.length+1]; [m\,+lG?)j
for(int i=0;i queue[++size]=data; 0(8gQ 2n
fixUp(size); bo1I&I
} gGI8t@t:
} N`HSE=u>
Qwv '<
private int size=0; S;8.yj-
x9%-plP
private int[] queue; ^sV|ck
ZOuR"9]
public int get() { N!L'W\H,
return queue[1]; r{S=Z~J
} 6 Uw;C84!
z?kd'j`FG
public void remove() { E67XPvo1+@
SortUtil.swap(queue,1,size--); B9*Sfw%
fixDown(1); p.C1nh
} jn$j^51`C
file://fixdown \45(#H<$
private void fixDown(int k) { ,T$r9!WTM
int j; :CTL)ad2
while ((j = k << 1) <= size) { @h#Xix7
if (j < size %26amp;%26amp; queue[j] j++; :_Fxy5}
if (queue[k]>queue[j]) file://不用交换 b =b:
break; |{f~Ks%
SortUtil.swap(queue,j,k); .E$q&7@/j
k = j; | 3giZ{
} 1~@|eWr|
} PBrnzkoY
private void fixUp(int k) { ~KRnr0
while (k > 1) { rz.IoQo
int j = k >> 1; )b92yP{
if (queue[j]>queue[k]) Nd!c2`
break; TKOP;[1h
SortUtil.swap(queue,j,k); hgO?+x
k = j; _CE9B e\
} hk} t:<
} %ek"!A
wAh#
} 3ji:O T
QKccrAo
} -~O/NX
Dtt-|_EMS
SortUtil： lw[<STpD;
`W"G!X-
package org.rut.util.algorithm; nY0sb8lZJ
e+@xsn3
import org.rut.util.algorithm.support.BubbleSort; )%VCzye*{
import org.rut.util.algorithm.support.HeapSort; B< hEx@
import org.rut.util.algorithm.support.ImprovedMergeSort; bSrZ{l
import org.rut.util.algorithm.support.ImprovedQuickSort; ug#<LO-.Rd
import org.rut.util.algorithm.support.InsertSort; m7m \`;
import org.rut.util.algorithm.support.MergeSort; 2~FPw{]j
import org.rut.util.algorithm.support.QuickSort; G),db%,X2
import org.rut.util.algorithm.support.SelectionSort; 8lwM{?k$
import org.rut.util.algorithm.support.ShellSort; ~`R1sSr"
M#a&\cqC
/** 3cC }'j
* @author treeroot 9j#@p
* @since 2006-2-2 3LW[H+k
* @version 1.0 pjN:&#Y]
*/ uD(t`W"
public class SortUtil { R1'`F{56
public final static int INSERT = 1; t5)J;0/
public final static int BUBBLE = 2; +(mL~td01
public final static int SELECTION = 3; :woa&(wN;1
public final static int SHELL = 4; tcA;#^jc
public final static int QUICK = 5; 8=Q VN_
public final static int IMPROVED_QUICK = 6; }-p,iTm
public final static int MERGE = 7; kCA5|u
public final static int IMPROVED_MERGE = 8; 7Fl-(Nv`
public final static int HEAP = 9; ,4Y*:JU4
O&'/J8
public static void sort(int[] data) { o.^y1mH'
sort(data, IMPROVED_QUICK); Y=Hz;Ni
} Jqru AW<
private static String[] name={ ]a/'6GbR
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Y&~M7TYb
}; gj+3y9
'm O2t~n
private static Sort[] impl=new Sort[]{ LC-)'Z9}5
new InsertSort(), Y {c5
new BubbleSort(), s, XM9h>P4
new SelectionSort(), 5f{|"LG&
new ShellSort(), zj%cQkZ
new QuickSort(), M!{'ED
new ImprovedQuickSort(), (~()RkT
new MergeSort(), \!H{Ks{#R.
new ImprovedMergeSort(), g:gB`8w?
new HeapSort() Fe$/t(
}; iV hJH4
r(`nt-o@
public static String toString(int algorithm){ iZ;TYcT
return name[algorithm-1]; i&Kz*,pt
} 9Nt3Z>d
_N'75
public static void sort(int[] data, int algorithm) { ($WE=biZ&
impl[algorithm-1].sort(data); ^l!L)iw
} OD+5q(!"a
gb 4pN
public static interface Sort { L2|aHI1'l
public void sort(int[] data); ("Dv>&w9
} 7Dt"]o"+
qY(:8yC36
public static void swap(int[] data, int i, int j) { tWD|qg_
int temp = data; m0( E kK
data = data[j]; .>]N+:O
data[j] = temp; 40K2uT{cq
} Eark)
} #":a6%0Q