[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; '\I(n|\
} 2+gbMd4n
int i1=l; p H y
int i2=mid+1; C7FQc{
for(int cur=l;cur<=r;cur++){ jr4xh{Z`
if(i1==mid+1) :3n@].
data[cur]=temp[i2++]; y("WnVI
else if(i2>r) ;>v.(0FE6
data[cur]=temp[i1++]; /h0bBP
else if(temp[i1] data[cur]=temp[i1++]; k{SGbC1=VK
else f1MRmp-f'
data[cur]=temp[i2++]; TVD~Ix
} sllT1%?
} "l56?@-x
`N *:,8j
} A)&FcMO*z
s$R /!,c
改进后的归并排序: [Cl0Kw.LD
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package org.rut.util.algorithm.support; @.e X8~3=
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import org.rut.util.algorithm.SortUtil; ?{S>%P A_B
.>B'oD
/** 2!^=G=H/
* @author treeroot dH^6K0J
* @since 2006-2-2 by@KdQow
* @version 1.0 _6NUtU
*/ K3?5bT_{
public class ImprovedMergeSort implements SortUtil.Sort { Y<xqws
S/'0czDMW
private static final int THRESHOLD = 10; a;HAuy`M x
<kK>C8+
/* 7AV{ h[J
* (non-Javadoc) 2tq2
* uQ5h5Cfz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -F~DOG%
*/ d.wGO]"
public void sort(int[] data) { Tc6cBe,
int[] temp=new int[data.length]; 2I-d.{
mergeSort(data,temp,0,data.length-1); o&?c,FwN
} <b:%o^
Ga7E}y%
private void mergeSort(int[] data, int[] temp, int l, int r) { >|QH I d8
int i, j, k; OIrm9D#
int mid = (l + r) / 2; f$o^Xu
if (l == r) Sa= tiOv
return; N(&{~*YE
if ((mid - l) >= THRESHOLD) f^$,;
mergeSort(data, temp, l, mid); QH/py
else TpKAdrY
insertSort(data, l, mid - l + 1); uY&1[(Pb
if ((r - mid) > THRESHOLD) /f3/}x!po
mergeSort(data, temp, mid + 1, r); M~:_^B
else +Q5O$8i
insertSort(data, mid + 1, r - mid); *-T.xo
Ei4^__g\'
for (i = l; i <= mid; i++) { <7^|@L 6
temp = data; %Rk|B`ST
} l00i2w
for (j = 1; j <= r - mid; j++) { b#6S8C+@
temp[r - j + 1] = data[j + mid]; #fuUAbU0X
} v"G1vSx)BT
int a = temp[l]; y]j.PT`Cw
int b = temp[r]; YN8x|DLi?
for (i = l, j = r, k = l; k <= r; k++) { Mn0.!J "
if (a < b) { 2)f_L|o,m
data[k] = temp[i++]; _?c.m*)A
a = temp; VgHO&vU
} else { 'c35%?]
data[k] = temp[j--]; X1^VdJE
b = temp[j]; ;I>nA6A
} cJ4My#w
} cJo%j -AM
} \O|SPhaIf
7Jn%XxHq
/** ]Z!Y*v
* @param data #J[g r_
* @param l C`.YOkpj
* @param i nrl?<4_
*/ ,h*gd^i
private void insertSort(int[] data, int start, int len) { N*Aw-\Bk
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); N<)CG,/w[M
} @>8(f#S%
} 7Nq< o5
} V[tebv!
} YdhTjvx
r[L.TX3Ah=
堆排序： 9Dx~!(
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package org.rut.util.algorithm.support; u[GZ~L
WcN4ff-
import org.rut.util.algorithm.SortUtil; :aNjh
-"[4E0g0
/** pv]@}+<Dt
* @author treeroot g NI1W@)
* @since 2006-2-2 zj`c%9N+
* @version 1.0 #w{`6}p
*/ gT)(RS`_)
public class HeapSort implements SortUtil.Sort{ uN%Cc12
vpu#!(N
/* (non-Javadoc) Ik:G5m<ta
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -nb U5o
*/ "hyfo,r
public void sort(int[] data) { tiK M+ ;C
MaxHeap h=new MaxHeap(); 4:V +>Jt
h.init(data); Jq_\r'YE
for(int i=0;i h.remove(); S@,/$L
System.arraycopy(h.queue,1,data,0,data.length); )PN8HJAArh
} K?l|1jez(#
gfL:SP8
private static class MaxHeap{ ('z=/"(l
7Jb&~{DVk
void init(int[] data){ $[T~<I
this.queue=new int[data.length+1]; $JFjR@j
for(int i=0;i queue[++size]=data; 2Io|?
fixUp(size); rc=E%Qv%?
} 392V\qtS
} 7?fgcb3
x?Sx cQP
private int size=0; SgU@`Pb
534pX7dg
private int[] queue; 8{4'G$6
!@z9n\Yj
public int get() { fk}Raej g
return queue[1]; &GH[$(
} [<B,6nAl
IogLkhWX
public void remove() { C >OeULD
SortUtil.swap(queue,1,size--); Hca(2 ]T-
fixDown(1); !{&r|6
} x.1=QF{!
file://fixdown =]@Bc 7@
private void fixDown(int k) { Zr}>>aIJ]k
int j; amsl>wc!
while ((j = k << 1) <= size) { 11PL1zzH
if (j < size %26amp;%26amp; queue[j] j++; Vz mlKVE
if (queue[k]>queue[j]) file://不用交换 %<yW(s9{
break; 2^XmtT
SortUtil.swap(queue,j,k); ev&l=(hY
k = j; ]D6<6OB
} kHK<~srB
} $ DN.
private void fixUp(int k) { U`*we43
while (k > 1) { _kD5pC =
int j = k >> 1; lg|6~=aQ
if (queue[j]>queue[k]) h#zm+([B*
break; i}T*| P
SortUtil.swap(queue,j,k); 5zS%F: 3
k = j; ei2?H;H;
} DS8HSSD
} 2?,lr2
dwn|1%D
} 8i6iynR
c<1$zQY!
} u/tJ])~@
l<_v3/3
SortUtil： !+$qSD,%x
hx^@aI
package org.rut.util.algorithm; #o&T$D5
+HE,Q6-A
import org.rut.util.algorithm.support.BubbleSort; Pr>$m{ Z
import org.rut.util.algorithm.support.HeapSort; m#h`iW
import org.rut.util.algorithm.support.ImprovedMergeSort; $I5|rB/4?
import org.rut.util.algorithm.support.ImprovedQuickSort; &Hw:65O
import org.rut.util.algorithm.support.InsertSort; ^aaj=p:cV
import org.rut.util.algorithm.support.MergeSort; 4H;g"nWqO
import org.rut.util.algorithm.support.QuickSort; -t_&H\_T
import org.rut.util.algorithm.support.SelectionSort; yc0 1\o
import org.rut.util.algorithm.support.ShellSort; d^'_H>x
ygTfQtN
/** WDNj7
* @author treeroot fTmJDUv+
* @since 2006-2-2 3@F U-k,i
* @version 1.0 f?.}S]u5
*/ 5+GTK)D
public class SortUtil { @!$xSH
public final static int INSERT = 1; ,$]m1|t@z
public final static int BUBBLE = 2; +^:uPW^U
public final static int SELECTION = 3; ufR|V-BWx
public final static int SHELL = 4; d Np%=gIj
public final static int QUICK = 5; z{.&sr>+v
public final static int IMPROVED_QUICK = 6; NiG&Lw*8
public final static int MERGE = 7; pTAm}
public final static int IMPROVED_MERGE = 8; ;zqxDl_
public final static int HEAP = 9; Vb 36R_u
65B&>`H~
public static void sort(int[] data) { Ds=d~sNu
sort(data, IMPROVED_QUICK); w[2E:Nj
} 1sUgjyGQ
private static String[] name={ zRh)q,Dt
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $zz4A~
}; `DSDuJw%
.==c~>N
private static Sort[] impl=new Sort[]{ `~axOp9N
new InsertSort(), @>`N%wH'
new BubbleSort(), FkMM>X
new SelectionSort(), J;fbE8x
new ShellSort(), i?>>%juK
new QuickSort(), &*Z)[Bl
new ImprovedQuickSort(), uvDOTRf
new MergeSort(), *o=Z~U9z
new ImprovedMergeSort(), x>i =
new HeapSort() T&dc)t`o
}; *`s*l+0b
Mf5kknYuL9
public static String toString(int algorithm){ @sR/l;
return name[algorithm-1]; <MxA;A
} ({4?RtYm
+o.#']}Pl
public static void sort(int[] data, int algorithm) { 0>,i] |Y
impl[algorithm-1].sort(data); j;Z hI y
} n~,6!S
h\C1:0x{
public static interface Sort { MO]zf3f!
public void sort(int[] data); fN`Prs A
} -6q7ze{@
BT:b&"AR[
public static void swap(int[] data, int i, int j) { _J>Ik2EF
int temp = data; _)CCD33$
data = data[j]; 45+kwo0
data[j] = temp; MNfc1I_#
} g6q[ I8
} PtjAu