[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; &IRA=nJ
} ZUXse1,
int i1=l; 4e+BqCriC*
int i2=mid+1; *5y W
for(int cur=l;cur<=r;cur++){ }F{C= l2
if(i1==mid+1) G(As%r]
data[cur]=temp[i2++]; ,2,SG/BB
else if(i2>r) XLZ j
data[cur]=temp[i1++]; F)/~p&H
else if(temp[i1] data[cur]=temp[i1++]; \f/#<|Hm
else *H5PT
data[cur]=temp[i2++]; xvR?~
} z1f^p7$M?
} <TR/ `
my ;
} ik2- OM
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改进后的归并排序: CF|moc:;
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package org.rut.util.algorithm.support; $ZI~8rI~
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import org.rut.util.algorithm.SortUtil; =[P%_v``
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/** @PQrmn6w
* @author treeroot S5~`T7Ra
* @since 2006-2-2 ,!6M*|
* @version 1.0 R:w%2Y
*/ MSZ!W(7,<
public class ImprovedMergeSort implements SortUtil.Sort { jCTy:q]
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private static final int THRESHOLD = 10; b/sOfQ
h; 'W :P
/* F0&~ ?2nG
* (non-Javadoc) (PS$e~Hs
* 3P//H88LY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [d4,gEx`Q\
*/ ORowx,(hX
public void sort(int[] data) { 4}Q O!(
int[] temp=new int[data.length]; 4%wq:y< )/
mergeSort(data,temp,0,data.length-1); $D QD$
} .pZo(*
`'p`PyMt`
private void mergeSort(int[] data, int[] temp, int l, int r) { rI0)F
int i, j, k; rIeM+h7Wn
int mid = (l + r) / 2; :E>&s9Yj?
if (l == r) }RcK_w@Jx)
return; Hp\Ddx >Jd
if ((mid - l) >= THRESHOLD) V@vhj R4r\
mergeSort(data, temp, l, mid); eo1&.FQu
else ^^G-kg
insertSort(data, l, mid - l + 1); umQi
if ((r - mid) > THRESHOLD) bh6d./
mergeSort(data, temp, mid + 1, r); lPY@{1W
else Zc-#;/b3T
insertSort(data, mid + 1, r - mid); GAv)QZyV$
0VzXDb>`
for (i = l; i <= mid; i++) { nQ5N=l
temp = data; 7p)N_cJD
} aZ`<PdA
for (j = 1; j <= r - mid; j++) { 9nn>O?
temp[r - j + 1] = data[j + mid]; bvl~[p$W3
} $^}[g9]1
int a = temp[l]; jip\4{'N
int b = temp[r]; f hQy36i@
for (i = l, j = r, k = l; k <= r; k++) { 'pan9PW
if (a < b) { 79D=d'eA
data[k] = temp[i++]; E{uf\Fc
a = temp; !w q4EV
} else { i90}Xyt
data[k] = temp[j--]; @l'G[jN5
b = temp[j]; bE?'C h
} UqN{JG:#.
} \V= &&(n#
} N~;*bvW{
6sPk:5
/** |GtY*|
* @param data /D0RC
* @param l 8;TAb.r
* @param i t)9]<pN%
*/ #(6) ^ (
private void insertSort(int[] data, int start, int len) { Z<;U:aH?}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); zI:(33)
} eUt=n)*`
} );nz4/V
} kI%peb?
} %`#G92Z_
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堆排序： t9.,/o,
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package org.rut.util.algorithm.support; GuT6K}~|D
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import org.rut.util.algorithm.SortUtil; #e/2C
!\^jt%e&
/** 3:lDL2
* @author treeroot 9 ~~qAoD
* @since 2006-2-2 ^]6M["d/p
* @version 1.0 ABc)2"i:*
*/ RlrZxmPV>O
public class HeapSort implements SortUtil.Sort{ id^|\hDR
6 }!Z"
/* (non-Javadoc) v dU%R\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a9=>r
*/ ]ni6p&b>
public void sort(int[] data) { q +R*Hi
MaxHeap h=new MaxHeap(); #$FrFU;ZR
h.init(data); _#!U"hkH
for(int i=0;i h.remove(); 7R,qDp S
System.arraycopy(h.queue,1,data,0,data.length); OUzR@$
} i^*M^P3m
thuRNYv<
private static class MaxHeap{ &|b4\uj9
)CLf;@1
void init(int[] data){ zsDocR
this.queue=new int[data.length+1]; daslaa_A
for(int i=0;i queue[++size]=data; ca(U!T68
fixUp(size); `?|Rc
} EUy(T1Cl&&
} #--olEj!
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private int size=0; $Jp~\_X
XA)'=L!^
private int[] queue; mG2VZ>
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public int get() { llq*T"7
return queue[1]; ,}0$Tv\1
} #{$1z;i?f
sw$2d
public void remove() { H\E7o"m
SortUtil.swap(queue,1,size--); %X>FVlPm
fixDown(1); gO='A(Y
} ]tB@kBi "
file://fixdown f#$|t>
private void fixDown(int k) { R_1qn
int j; ~U$":~H[
while ((j = k << 1) <= size) { )JhT1j Qc
if (j < size %26amp;%26amp; queue[j] j++; SO;N~D1Z6
if (queue[k]>queue[j]) file://不用交换 (wuaxo:
break; byGn,m
SortUtil.swap(queue,j,k); qsI^oBD"
k = j; QXVC\@
} j13DJ.xu
} R>2IRvY(
private void fixUp(int k) { 9 |.Ao
while (k > 1) { BLn_u,3
int j = k >> 1; $.rzc]s
if (queue[j]>queue[k]) Zw{MgoJ0Z
break; M0L&~p_F
SortUtil.swap(queue,j,k); %2"J:0j
k = j; |sIr?RL{C
} 8#X_#
} PLA#!$c7q
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} `G!M>h@
j*400
} *fnvZw?
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SortUtil： mR%FqaN_
}D*yr3b
package org.rut.util.algorithm; T\9~<"P^
WOX}Sw"
import org.rut.util.algorithm.support.BubbleSort; z.oU4c
import org.rut.util.algorithm.support.HeapSort; .[:VSM7T
import org.rut.util.algorithm.support.ImprovedMergeSort; 8{0k0 &x
import org.rut.util.algorithm.support.ImprovedQuickSort; :Q_3hK
import org.rut.util.algorithm.support.InsertSort; %S@L|t
import org.rut.util.algorithm.support.MergeSort; M`7y>Ud
import org.rut.util.algorithm.support.QuickSort; hmC*^"C>U=
import org.rut.util.algorithm.support.SelectionSort; lnh+a7a)
import org.rut.util.algorithm.support.ShellSort; 'yY>as
'<dgT&8C
/** R)5n 8
* @author treeroot !GwL,)0@^
* @since 2006-2-2 epg#HNP7^Y
* @version 1.0 J !HjeZ
*/ g(Yb^'X/
public class SortUtil { *?t%0){
public final static int INSERT = 1; A"uULfnk
public final static int BUBBLE = 2; pOT7;-#n
public final static int SELECTION = 3; 'cBBt
public final static int SHELL = 4; $s-Y%gc
public final static int QUICK = 5; PuL<^aJ
public final static int IMPROVED_QUICK = 6; Z=?aEU$7
public final static int MERGE = 7; X~oK[Nf'9
public final static int IMPROVED_MERGE = 8; ik.A1j9oN
public final static int HEAP = 9; vLT0ETHg6
ZnW@YC#9
public static void sort(int[] data) { W*N$'%
sort(data, IMPROVED_QUICK); IH9.F
} lg$zGa?
private static String[] name={ y<:<$22O
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <S?#@F\"S
}; [?k8}B)mHB
i-" p)2d=#
private static Sort[] impl=new Sort[]{ *\G)z|^yx
new InsertSort(), 0bS|fMgc
new BubbleSort(), :A1:
new SelectionSort(), _; Y`
new ShellSort(), Iu[|<Cx
new QuickSort(), lpB3&H8&
new ImprovedQuickSort(), %NHkDa!
new MergeSort(), 2]cRXJ7h
new ImprovedMergeSort(), bBc[bc>R
new HeapSort() O+vS|
}; ;30nd=
XH}'w9VynR
public static String toString(int algorithm){ 9X$ma/P[
return name[algorithm-1]; a<~77~"4wn
} eHiy,IN
47K1$3P
public static void sort(int[] data, int algorithm) { tDg}Ys=4K>
impl[algorithm-1].sort(data); )2IH 5
} c!K]J
*Hz^K0:8(
public static interface Sort { f+_h !j
public void sort(int[] data); Z?5V4F:f
} =O).Lx2J
457\&
public static void swap(int[] data, int i, int j) { `Ag{)
int temp = data; **3 z;58i
data = data[j]; 9iUrnG*
data[j] = temp; q 11IkDa
} )3Z ^h<"j
} Ej".axjT