[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; :p(3Ap2TY
} h2!We#
int i1=l; \QstcsEt
int i2=mid+1; qn6Y(@<[
for(int cur=l;cur<=r;cur++){ NHUx-IqOX
if(i1==mid+1) GNqw]@'Yf
data[cur]=temp[i2++]; V(A6>0s$|
else if(i2>r) sbrU;X_S
data[cur]=temp[i1++]; Zk)]=<H
else if(temp[i1] data[cur]=temp[i1++]; oJUVW"X6
else 7:I` ~ @m
data[cur]=temp[i2++]; ,;'9PsIS^
} L=Fm:O'#2
} T#Qn\8
0~H(GG$VH
} #q%xJ[
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改进后的归并排序: A{Z=[]r1`E
d3+pS\&IX?
package org.rut.util.algorithm.support; 0"kNn5
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import org.rut.util.algorithm.SortUtil; SgHLs
vAbMU
/** bg*4Z?[dd
* @author treeroot d Ayof=
* @since 2006-2-2 bBc<yaN
* @version 1.0 _y#t[|}w
*/ @>_`g=
public class ImprovedMergeSort implements SortUtil.Sort { ;WC]Lf<Z^
=2BGS\$#
private static final int THRESHOLD = 10; cXFNX<
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/* AKC';J
* (non-Javadoc) Aj#CB.y
* xN:ih*+,v
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iE, I\TY[
*/ + O=wKsGD
public void sort(int[] data) { fmXA;^%
int[] temp=new int[data.length]; _|bIl%W;\'
mergeSort(data,temp,0,data.length-1); %kS+n_*
} x1W<r)A )r
<LIL{g0eX
private void mergeSort(int[] data, int[] temp, int l, int r) { sWP5=t(i+9
int i, j, k; `/#f8R1g
int mid = (l + r) / 2; zdrCr0Rx,
if (l == r) `$\g8Mo
return; .i>; ?(GH
if ((mid - l) >= THRESHOLD) oJ\UF S
mergeSort(data, temp, l, mid); ~Jrtm7
else 8bLA6qmM\
insertSort(data, l, mid - l + 1); @tWyc%t
if ((r - mid) > THRESHOLD) s9>f5u?dK
mergeSort(data, temp, mid + 1, r); abh='5H|^|
else s]Nh9h
insertSort(data, mid + 1, r - mid); laG@SV
l69&-Nyg
for (i = l; i <= mid; i++) { o7)<pfif
temp = data; 8Eyi`~cAiH
} oMawINDa
for (j = 1; j <= r - mid; j++) { Mo\LFxx>4{
temp[r - j + 1] = data[j + mid]; Fq>=0 )
} 'VcZ_m:
int a = temp[l]; {L5!_]6
int b = temp[r]; D0Yl?LU3
for (i = l, j = r, k = l; k <= r; k++) { Z{s&myd
if (a < b) { D1o<:jOj
data[k] = temp[i++]; -B-?z?+(O
a = temp; ^m.QW*
} else { {"$ Q'T
data[k] = temp[j--]; rVgz+'rFD[
b = temp[j]; {</MC`
} p\T9q
} *{8<4CVv
} d0ThhO
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/** ,#3u.=IR[
* @param data np,L39:sf
* @param l ,S5tkTa
* @param i 1ThONrxu
*/ 9v>BP`Mg
private void insertSort(int[] data, int start, int len) { v-M3/*
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); NSH20$A<
} }`#OA]NZ
} F4'g}yOLd
} mL/]an@Y
} Rj 2N+59rg
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堆排序： 7Gb1[3
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package org.rut.util.algorithm.support; eQ_dO]Q
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import org.rut.util.algorithm.SortUtil; d\Cx(Lb[
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/** e=K2]Y Q{
* @author treeroot Gh}k9-L
* @since 2006-2-2 R\k= CoJJ
* @version 1.0 i bAZ*I
*/ YoiM\gw
public class HeapSort implements SortUtil.Sort{ #v!(uuq,
d'ddxT$GG
/* (non-Javadoc) <tkxE!xF`J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v,t;!u,40
*/ y,&.<Yc
public void sort(int[] data) { 2,,zN-9mt
MaxHeap h=new MaxHeap(); fFP>$
h.init(data); Zwy8SD'L
for(int i=0;i h.remove(); C"l_78
System.arraycopy(h.queue,1,data,0,data.length); vzD3_ ?D
} +E8\g
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private static class MaxHeap{ Wy^43g38'p
XQCu\\>;
void init(int[] data){ P|}~=2J
this.queue=new int[data.length+1]; KV1zx(WI
for(int i=0;i queue[++size]=data; ;\(Wz5Ok&J
fixUp(size); 0v6(A4Y
} wI'8B{[
} g-^Cf
v_Om3i9$E
private int size=0; K07SbL7g!p
(?MRbX]@
private int[] queue; 'VA\dpa{J
:$Lu V5
public int get() { AWlR" p2
return queue[1]; oXw}K((|
} O8BxXa@5
zt/p'khP3
public void remove() { cU}j Whu
SortUtil.swap(queue,1,size--); `P;fD/I
fixDown(1); @kU{
} \ZdV|23
file://fixdown KQsS)ju
private void fixDown(int k) { U" eP>HHp
int j; _%WJ7~>
while ((j = k << 1) <= size) { I!bzvPJ]xc
if (j < size %26amp;%26amp; queue[j] j++; S<^*jheO5
if (queue[k]>queue[j]) file://不用交换 @}@`lv65}
break; j^A0[:2
SortUtil.swap(queue,j,k); y7M"Dr%t^
k = j; <p<jXwl
} $q#|B3N%
} zRyZrt,%&
private void fixUp(int k) { #BK\cIr
while (k > 1) { r1:S8RT;H5
int j = k >> 1; 9:0JWW^so
if (queue[j]>queue[k]) S9X~<!]
break; ':yE5j
SortUtil.swap(queue,j,k); -L7Q,"a$
k = j; N*JWd
} )mO|1IDTN
} <Q)6N!Tp^
kJIKULf
} =]x FHw8A
L+Q"z*W
} *,1^{mb
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SortUtil： k^I4z^O=-;
4&/u1u0
package org.rut.util.algorithm; KfJF9!U*?
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import org.rut.util.algorithm.support.BubbleSort; N(mhgC<O
import org.rut.util.algorithm.support.HeapSort; MO)N0{.b
import org.rut.util.algorithm.support.ImprovedMergeSort; 6 )eO%M`
import org.rut.util.algorithm.support.ImprovedQuickSort; o2?[*pa
import org.rut.util.algorithm.support.InsertSort; ry}CND(nB
import org.rut.util.algorithm.support.MergeSort; ewB&PR
import org.rut.util.algorithm.support.QuickSort; 0}$",M!p
import org.rut.util.algorithm.support.SelectionSort; FCQIfJ#
import org.rut.util.algorithm.support.ShellSort; 1fwCQM
YhFB*D;
/** g<oSTAw
* @author treeroot &k(t_~m>
* @since 2006-2-2 ch,<4E/c[R
* @version 1.0 ,eD@)K_:
*/ |0n h
public class SortUtil { 1g{`1[.QO
public final static int INSERT = 1; ;hNnF&l
public final static int BUBBLE = 2; cX"[#Em#
public final static int SELECTION = 3; x:=Kr@VP
public final static int SHELL = 4; 7}(LO^,A
public final static int QUICK = 5; 8m1@l$
public final static int IMPROVED_QUICK = 6; ^dH#n~Wx0
public final static int MERGE = 7; 2H fP$.
public final static int IMPROVED_MERGE = 8; 3nf+imAF
public final static int HEAP = 9; mIq6\c$
<||F$t
public static void sort(int[] data) { 34U/"+|z
sort(data, IMPROVED_QUICK); |//cA2@.
} wIuwq>
private static String[] name={ =K{$?%"
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5gZ0a4
}; <=n$oMO
sLzcTGa2:z
private static Sort[] impl=new Sort[]{ $bh2zKB)
new InsertSort(), gE(QVbh(
new BubbleSort(), r]Da4G^
new SelectionSort(), U#1T HO`
new ShellSort(), kx3H}od]
new QuickSort(), "Q'#V!
new ImprovedQuickSort(), cH'*J/
new MergeSort(), 4JFi|oK0H
new ImprovedMergeSort(), D|9C|q
new HeapSort() bP&o]?dN
}; CjORL'3
_ZIaEJjH/
public static String toString(int algorithm){ au}rS0)+
return name[algorithm-1]; >>Hsx2M
} ?2OT:/I,
e"hm|'
public static void sort(int[] data, int algorithm) { PHi'&)|
impl[algorithm-1].sort(data); uDK`;o'F
} UP 1Y3
D}px=?
public static interface Sort { YTQ|Hg6jO
public void sort(int[] data); $$<9tqA
} G{}E~jDi?
F*>:~'%
public static void swap(int[] data, int i, int j) { vLDMa>
int temp = data; XJ?|\=]
data = data[j]; }lML..((1
data[j] = temp; 'IFbD["r
} qD7(+a
} 8|{:N>7