[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; +D`IcR-x
} "m _wYX
int i1=l; d~O\zLQ;
int i2=mid+1; #=5/D@
for(int cur=l;cur<=r;cur++){ !iCY!:
if(i1==mid+1) A"#Gg7]tl'
data[cur]=temp[i2++]; r.[!n)*
else if(i2>r) vl2!2X
data[cur]=temp[i1++]; hFZ7{pj
else if(temp[i1] data[cur]=temp[i1++]; cW26TtU(
else D+N{'d?+
data[cur]=temp[i2++]; lEANNu
} ?A2#V(4
} 5X nA.?F^
{G/4#r 2>
} _%;$y5]v
OYgD9T.8^
改进后的归并排序: 3F[z]B
tV@!jaj\
package org.rut.util.algorithm.support; 7 \!t/<
C*b!E:
import org.rut.util.algorithm.SortUtil; yiSv#wD9
<:2El9l!
/** $dgY#ST%
* @author treeroot z(aei(U=
* @since 2006-2-2 y0M^oLx
* @version 1.0 t@>Uc`%
*/ |OUr=b
public class ImprovedMergeSort implements SortUtil.Sort { &$qqF&
@.a[2,o_
private static final int THRESHOLD = 10; pqBd#
:o&qJ%
/* GG5wiN*2S
* (non-Javadoc) .4^Ep\\
* ^hq`dr|R=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %/CCh;N#
*/ 't{~#0d=
public void sort(int[] data) { 1xar L))
int[] temp=new int[data.length]; >jME == U0
mergeSort(data,temp,0,data.length-1); ux& WN ,
} dG'aJQw
`!kOyh:X
private void mergeSort(int[] data, int[] temp, int l, int r) { CQW#o_\
int i, j, k; {l%Of
int mid = (l + r) / 2; |gA~E>IqF
if (l == r) c-z ,}`
return; 81O`#DfZ
if ((mid - l) >= THRESHOLD) 5yI_uQR
mergeSort(data, temp, l, mid); 4)!aYvaER
else 8Sd<!
insertSort(data, l, mid - l + 1); !0CC&8C`
if ((r - mid) > THRESHOLD) ']4b}F:}
mergeSort(data, temp, mid + 1, r); b\Y<1EV^[
else ZO5_n
insertSort(data, mid + 1, r - mid); b<P9@h~:
PF2PMEBx!
for (i = l; i <= mid; i++) { *R m>bLI
temp = data; 75u/'0~5
} mQhI"3!f
for (j = 1; j <= r - mid; j++) { 9i*t3W71]
temp[r - j + 1] = data[j + mid]; casva;
} PB_+:S^8
int a = temp[l]; B<u6Z!Pp2
int b = temp[r]; *8M0h9S$
for (i = l, j = r, k = l; k <= r; k++) { <kN4@bd;
if (a < b) { / Of*II&
data[k] = temp[i++]; [`BMi-WQ
a = temp; +)h*)
} else { __fa,kK{?
data[k] = temp[j--]; )q8w+'z
b = temp[j]; JcL4q\g
} 'c*Q/C;
} ~,WG284
} eRKuy l
LuM:dJ
/** HQw98/-_W
* @param data 5I`j'j
* @param l 3}@3pVS
* @param i c>#T\AEkF
*/ jNhiY
private void insertSort(int[] data, int start, int len) { Ua\]]<hj"
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); y3{'s>O6
} v;AsV`g
} }:<`L\8q\
} 4$#nciAe
} tgSl(.
+!h~T5Ck
堆排序： d]{wZ#x
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package org.rut.util.algorithm.support; B9^@d
+:k Iq
import org.rut.util.algorithm.SortUtil; b;G3&R]
-c|dTZ8D)8
/** AiKja>Fl<
* @author treeroot V`7
* @since 2006-2-2 I .jB^
* @version 1.0 W=:4I[a6Q
*/ N4]QmRX/j
public class HeapSort implements SortUtil.Sort{ Fk=Sx<TX
qM= $,s*
/* (non-Javadoc) y (@j;Q3(r
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ySAkj-< /P
*/ .<7M4Z
public void sort(int[] data) { @SeInew;`l
MaxHeap h=new MaxHeap(); oS6dcJHf
h.init(data); UKX9C"-5v
for(int i=0;i h.remove(); nX~Qt%
System.arraycopy(h.queue,1,data,0,data.length); ntR@[)K
} _/(DEF+G
,' VT75
private static class MaxHeap{ 1Tl^mS~k
PxfWO1S(
void init(int[] data){ VBnD:w"z
this.queue=new int[data.length+1]; (#I$4Px{
for(int i=0;i queue[++size]=data; KmS$CFsGL
fixUp(size); (mbC! !>
} UdO(9Jc5^
} 9<0TF+}>
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private int size=0; cjK\(b3
[PG#5.jwQ
private int[] queue; zwJB.4@
(=&z:-52V
public int get() { ?+Gc.lU
return queue[1]; 1<|\df.
} -KV)1kET
)S?.YCv?
public void remove() { 6d~[j<@2
SortUtil.swap(queue,1,size--); N{+6V`\
fixDown(1); :&SvjJR
} UU\wP(f
file://fixdown VWhq+8z
private void fixDown(int k) { t&|M@Ouet
int j; ~-2%^ovB
while ((j = k << 1) <= size) { QIl=Ho"c
if (j < size %26amp;%26amp; queue[j] j++; ]hE%Tk-
if (queue[k]>queue[j]) file://不用交换 ,~8&0p
break; 03N|@Tu
SortUtil.swap(queue,j,k); , e^&,5b
k = j; @yV.Yx"p_
} gn82_
} <&w(%<;
private void fixUp(int k) { zXX=WH
while (k > 1) { kXW5bR
int j = k >> 1; CE,0@%6F*
if (queue[j]>queue[k]) 78M%[7Cq<i
break; !m]_tB
SortUtil.swap(queue,j,k); 7sypU1V6
k = j; ]bcAbCZ@
} 7Eb |AR
} !O)je>A
B`{7-Asc1
} ?,XrZRF
(:Y0^
} X|&v]mJ
zX]4DLl,
SortUtil： 9}-;OJe
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package org.rut.util.algorithm; Gx)U~L$B
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import org.rut.util.algorithm.support.BubbleSort; #(pY~\
import org.rut.util.algorithm.support.HeapSort; o|7ztpr
import org.rut.util.algorithm.support.ImprovedMergeSort; ~K$dQb])
import org.rut.util.algorithm.support.ImprovedQuickSort; 3M^s EaUI
import org.rut.util.algorithm.support.InsertSort; D9yAq'k$
import org.rut.util.algorithm.support.MergeSort; G^1 5V'*
import org.rut.util.algorithm.support.QuickSort; G/ sRiwL
import org.rut.util.algorithm.support.SelectionSort; <@.!\
import org.rut.util.algorithm.support.ShellSort; \u4`6EYF?
yC&u^{~BC
/** +HDfEo T
* @author treeroot =Ju%3ptH0
* @since 2006-2-2 5,_DM
* @version 1.0 JnE\z*NB
*/ y.>1r7
public class SortUtil { Z\[6'R4.#
public final static int INSERT = 1; E\5Cf2Ox
public final static int BUBBLE = 2; )#os!Ns_A
public final static int SELECTION = 3; %ztv.K(8
public final static int SHELL = 4; ]0o_- NI
public final static int QUICK = 5; TI5<' U)
public final static int IMPROVED_QUICK = 6; k,,Bf-?
public final static int MERGE = 7; D[p_uDIz
public final static int IMPROVED_MERGE = 8; e6`g[Ap
public final static int HEAP = 9; 6N\f>c
tkIpeL[d
public static void sort(int[] data) { ]]Fe:>
sort(data, IMPROVED_QUICK); S^Mx=KJG
} ^\ku}X_[?
private static String[] name={ Q30TR
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0_&5S`tj
}; n@=D,'cn
Zjkg"
private static Sort[] impl=new Sort[]{ mXwDB)O{)
new InsertSort(), r=gF&Og,?
new BubbleSort(), zI7iZ"2a
new SelectionSort(), Um~DA
new ShellSort(), % `\}#
new QuickSort(), pqF!1
new ImprovedQuickSort(), cj;k{Moc
new MergeSort(), $Wn!vbL
new ImprovedMergeSort(), Oh=E!
new HeapSort() *<ILSZ
}; 230ijq3YG
mS?W+jy%
public static String toString(int algorithm){ 9,jFQb(),
return name[algorithm-1]; G2 0
} ]?*'[
bQgtZHO
public static void sort(int[] data, int algorithm) { 0`QF:
impl[algorithm-1].sort(data); [;Y*f,UG_-
} ruU &.mZ
jPIOBEIG
public static interface Sort { GZ1c~uAu
public void sort(int[] data); &{e:6t
} +.J/7gD
`f<&=_,xfH
public static void swap(int[] data, int i, int j) { (`"87Xomnn
int temp = data; U|~IJU3-
data = data[j]; 6f*QUw~
data[j] = temp; F\2<q$Zn+
} jZgCDA8Mr!
} exxH0^