[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; <<01@Q <
} rx9*/Q0F
int i1=l; p(pfJ^/:(
int i2=mid+1; PV#h_X<l%
for(int cur=l;cur<=r;cur++){ o6A$)m5V
if(i1==mid+1) hM]Z T5;<
data[cur]=temp[i2++]; MU$tX
else if(i2>r) `vH|P
data[cur]=temp[i1++]; Kn->R9Tl
else if(temp[i1] data[cur]=temp[i1++]; Bg),Q8\I
else ^mq(j_E.
data[cur]=temp[i2++]; JxinfWk
} |aLK_]!
} :j`f%Vg~x
dI\_I]
} `:=1*7)?
ht%qjE
改进后的归并排序: w=XIpWl
/V*SI!C<f
package org.rut.util.algorithm.support; }ex4dhx2M
(W h)Ov"
import org.rut.util.algorithm.SortUtil; _6fy'%J=U
^5s7mls
/** `n>|rd
* @author treeroot 8?82 p
* @since 2006-2-2 ;+\h$
* @version 1.0 Y#c439&
*/ MtL<)?HQ
public class ImprovedMergeSort implements SortUtil.Sort { kS_#8I
Z5TA4Q+Q
private static final int THRESHOLD = 10; (qFZF7(Xa
Lan|(!aW
/* MDytA0M
* (non-Javadoc) MxpAh<u!vF
* n>pJ/l%`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8;pY-j #
*/ aUNA` L
public void sort(int[] data) { LN+x!#:e
int[] temp=new int[data.length]; bJn&Y
mergeSort(data,temp,0,data.length-1); I8!>7`L
} xwo*kFg
/x@aAJ|
private void mergeSort(int[] data, int[] temp, int l, int r) { [[c0g6
int i, j, k; 0]5XTc3r
int mid = (l + r) / 2; w\i]z1
if (l == r) U3_O}X+
return; iT&4;W=72~
if ((mid - l) >= THRESHOLD) s3sRMB2
mergeSort(data, temp, l, mid); 60|PVsmDm
else ,j XK
insertSort(data, l, mid - l + 1); %P~;>4i,
if ((r - mid) > THRESHOLD) |aenQA#
mergeSort(data, temp, mid + 1, r); d,?D '/
else EeMKo
insertSort(data, mid + 1, r - mid); =7e!'cF[
Ze>R@rK
for (i = l; i <= mid; i++) { 0p.MH~mx
temp = data; Yr{hJGw[
} E+i(p+=4
for (j = 1; j <= r - mid; j++) { 8SRUqe[H]
temp[r - j + 1] = data[j + mid]; fNi&r0/-t
} ,ASNa^7/>
int a = temp[l]; v76P?[
int b = temp[r]; gw"SKp!]
for (i = l, j = r, k = l; k <= r; k++) { w-JWMgY8w
if (a < b) { [5'HlHK
data[k] = temp[i++]; Y`8)`
a = temp; - c>Vw&1
} else { Psf'^42(v
data[k] = temp[j--]; B~]6[Z
b = temp[j]; $,:mq>]![{
} dBA&NW07
} ,gk'8]
} .f0qgmIyL
hpXW tQ
/** |_ED*ATR=
* @param data 8nBYP+t,e
* @param l #Hr'plg 8
* @param i s:lH4B
*/ &Ih}"
private void insertSort(int[] data, int start, int len) { <_8bAO8\
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )SP"V~^Wn
} 'y!qrmMRr
} 5|0/$ SWd*
} Q\s+w){f%
} @_"cMU!
nGWy4rY2S
堆排序： gdD|'h
oUsfO-dET^
package org.rut.util.algorithm.support; 7:F0?l*
EGI$=Y
import org.rut.util.algorithm.SortUtil; _R(ZvsOZ
[2xu`HT02
/** Y[)mHs2
* @author treeroot nHeJ20
* @since 2006-2-2 xO:h[
* @version 1.0 u(3 uZ:
*/ XK\nOHLS
public class HeapSort implements SortUtil.Sort{ !pU^?Hy=
68GH$ji
/* (non-Javadoc) B.4e4%BBS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }%}$h2:
*/ v/xlb&Xx
public void sort(int[] data) { U}:+Hz9
MaxHeap h=new MaxHeap(); 93D}0kp
h.init(data); 5JaLE5-
for(int i=0;i h.remove(); DqY"N]
System.arraycopy(h.queue,1,data,0,data.length); l"JM%LV
} Hd;NvNS
K:-jn}i?/
private static class MaxHeap{ ~D5FnN9
]:@{tX7c
void init(int[] data){ m4h)Wq
this.queue=new int[data.length+1]; An#[ +?
for(int i=0;i queue[++size]=data; Y?1T XsvF
fixUp(size); ZzBaYoNy[0
} +}at#%1@
} _;^x^
Oto8?4[n
private int size=0; $X;OK
vh&~Y].W Y
private int[] queue; p@q20>^u
5N>flQ
public int get() { hd9~Zw]V
return queue[1]; 72RTEGy
} nm`(;<W
%JPr 7 }
public void remove() { hj"JmF$m
SortUtil.swap(queue,1,size--); rD$5]%Y
fixDown(1); kuBtPZ
} 2{WZ?H93a
file://fixdown vv)w@A:Vn)
private void fixDown(int k) { &k|EG![
int j; m4W(h6
while ((j = k << 1) <= size) { q]f7D\ M
if (j < size %26amp;%26amp; queue[j] j++; i@6g9\x+
if (queue[k]>queue[j]) file://不用交换 |FT.x9e-
break; @I1*b>X~<
SortUtil.swap(queue,j,k); ]U~{?K'g@j
k = j; h`! 4`eI
} GGwwdB\x'
} Yur}<>`(
private void fixUp(int k) { D@sMCR
while (k > 1) { g qORE/[
int j = k >> 1; dHOH]x
if (queue[j]>queue[k]) o$->|k
break; 8zRw\]?
SortUtil.swap(queue,j,k); 8?m=Vw<kIZ
k = j; ubZuvWZ
} 65@GXn[W_
} >Giw\|:f(
jxW/"Q
} )IK%Dg(v
V6ECL6n
} q2|z \
cEp/qzAiD%
SortUtil： w=-{njMz6&
OAo03KW
package org.rut.util.algorithm; n}b/9
\Qv:7;?
import org.rut.util.algorithm.support.BubbleSort; Vm@VhCsp
import org.rut.util.algorithm.support.HeapSort; X`v6gv5qj
import org.rut.util.algorithm.support.ImprovedMergeSort; (/&ht-~EL
import org.rut.util.algorithm.support.ImprovedQuickSort; Q ijO%)
import org.rut.util.algorithm.support.InsertSort; Qu<HeSA_
import org.rut.util.algorithm.support.MergeSort; 8Rw:SU9H?T
import org.rut.util.algorithm.support.QuickSort; zN9@.!?X2
import org.rut.util.algorithm.support.SelectionSort; MwD+'5
import org.rut.util.algorithm.support.ShellSort; ~ cu+QR)
c uAp,!
/** K4NzI9@
* @author treeroot liB~vdqj
* @since 2006-2-2 ^cW{%R>XY
* @version 1.0 =$~x]
*/ xzMpTZQ
public class SortUtil { |1!|SarM{B
public final static int INSERT = 1; c\P}ZQ
public final static int BUBBLE = 2; *2pE39
public final static int SELECTION = 3; {hO|{vz
public final static int SHELL = 4; Y8s-cc(
public final static int QUICK = 5; @:'E9J06
public final static int IMPROVED_QUICK = 6; 26_PFHQu4
public final static int MERGE = 7; `.VkR5/
public final static int IMPROVED_MERGE = 8; PMQ31f/zf
public final static int HEAP = 9; c}=[r1M*
&,XPMT
public static void sort(int[] data) { |M<R{Tt}nf
sort(data, IMPROVED_QUICK); } -hH2
} \sVzBHy d
private static String[] name={ hI<$lEB
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" c&RiUU7
}; R 'mlKe x
W^:g_
private static Sort[] impl=new Sort[]{ 6xh-m
new InsertSort(), XxB%
new BubbleSort(), |QH )A
new SelectionSort(), z}VCiS0
new ShellSort(), B%[#["Ol
new QuickSort(), Q3)[ *61e
new ImprovedQuickSort(), E9 #o0Di
new MergeSort(), 1U~'8=-
new ImprovedMergeSort(), hoPh#? G
new HeapSort() V^9%+L+E5
}; ~te{9/
/oM&29 jy
public static String toString(int algorithm){ ~fgS"F^7n
return name[algorithm-1]; ,tBc%&.f
} +x:VIi
k8.,id
public static void sort(int[] data, int algorithm) { c3Ig4n0Y>
impl[algorithm-1].sort(data); gd31ds!G
} oFGgr2Re
N~yGtnW
public static interface Sort { #zd}xla0]
public void sort(int[] data); *i7-_pT
} 7x |Pgu(
P/9|mYmsq
public static void swap(int[] data, int i, int j) { !G~\9
int temp = data; '_=XfTF
data = data[j]; !Nhq)i
data[j] = temp; b{e|~v6&
} |TBKsx8
} v}z{OB