[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; Gmcx#?|Tx
} 0`X%&
int i1=l; ]Y[8|HJ8
int i2=mid+1; s)]Z*#ZZ
for(int cur=l;cur<=r;cur++){ |=.z0{A7H
if(i1==mid+1) UXB[3SP
data[cur]=temp[i2++]; ^&t(O1.-
else if(i2>r) p9<OXeY
data[cur]=temp[i1++]; X-di^%<
else if(temp[i1] data[cur]=temp[i1++]; 7lpd$Y
else ?v2OoNQ
data[cur]=temp[i2++]; b~ ?TDm7
} 5*1wQlL
} ?U0iHg{
zO>N3pMv
} u!2.[CV
qx5X2@-;:
改进后的归并排序: ~B%EvG7:n
8|[\Tp:;
package org.rut.util.algorithm.support; 9/w'4bd
/2oTqEqaV
import org.rut.util.algorithm.SortUtil; =$5[uI2
xJ9_#$ngeM
/** =5&)^
* @author treeroot Yfy6o6*:
* @since 2006-2-2 yy?|q0
* @version 1.0 2]NP7Ee8Z
*/ ( DwIAO/S
public class ImprovedMergeSort implements SortUtil.Sort { $JmL)r
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private static final int THRESHOLD = 10; e#k9}n^+
S6H=(l58
/* pooi8" G
* (non-Javadoc) fDq, )~D
* xy$FS0u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 14\%2nE
*/ \{da|n-
public void sort(int[] data) { "}K/ b
int[] temp=new int[data.length]; UA,&0.7
mergeSort(data,temp,0,data.length-1); )T#;1qNB
} ,?B.+4CW\E
W<2%J)N<
private void mergeSort(int[] data, int[] temp, int l, int r) { X5wS6v)#(
int i, j, k; Hi|2z5=V
int mid = (l + r) / 2; G"MpA[a_
if (l == r) @.*[CC;&
return; .mDqZOpf=4
if ((mid - l) >= THRESHOLD) YH<F~F _
mergeSort(data, temp, l, mid); 2xe_Q70II
else ~B(]0:
insertSort(data, l, mid - l + 1); j %TYyL-
if ((r - mid) > THRESHOLD) j`BFk>
mergeSort(data, temp, mid + 1, r); p{Pa(Z]G
else '! 1ts@
insertSort(data, mid + 1, r - mid); 1`O`!plD+
CX':nai
for (i = l; i <= mid; i++) { j)-D.bY0
temp = data; yN3Tk}{V
} JIb<>X,
for (j = 1; j <= r - mid; j++) { 1>%SSQ
temp[r - j + 1] = data[j + mid]; *, *"G?
} q'(WIv@
int a = temp[l]; #C+Gk4"w
int b = temp[r]; JF{,;&sj
for (i = l, j = r, k = l; k <= r; k++) { Wlg(z%
if (a < b) { YfMe69/0I
data[k] = temp[i++]; =_":Z!_
a = temp; +crAkb}i
} else { LOnhFX
data[k] = temp[j--]; 2)j\Lg_M
b = temp[j]; iLmU|jdE
} %4 SREq
} G)# ,39P
} "[[fQpe4@
W$'pUhq\H
/** rG\m]C3E
* @param data o B6"D
* @param l !5B9:p~-
* @param i fykN\b
*/ ,6M-xSDs
private void insertSort(int[] data, int start, int len) { ='VIbE@qC
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *0c }`|
} 5)nv
} zl: u@!'
} Tby+Pd;
} mCz6&
dlT\VWMha(
堆排序： `|/|ej]$P
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package org.rut.util.algorithm.support; ("lcL2Bq
.\d0lJSr
import org.rut.util.algorithm.SortUtil; }TF<C!]
&)X<yd0
/** %ly;2HIk
* @author treeroot :%>8\q>UX
* @since 2006-2-2 XS!ZTb>[
* @version 1.0 cbwzT0
*/ D46|)-
public class HeapSort implements SortUtil.Sort{ 8uT6QCf
'I<j`)4`d
/* (non-Javadoc) K[kmfXKu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O,>&w5
*/ @[FFYVru
public void sort(int[] data) { {``}TsN
MaxHeap h=new MaxHeap(); 2ga}d5lu
h.init(data); X,fTzkGj
for(int i=0;i h.remove(); DA wzXsx
System.arraycopy(h.queue,1,data,0,data.length); <Z__Q
} ZH}NlEn
sY6'y'a95
private static class MaxHeap{ IRU2/Ycg
ua[\npz5
void init(int[] data){ F0JFx$AoD
this.queue=new int[data.length+1]; z<fEJN
for(int i=0;i queue[++size]=data; _@p|A
fixUp(size); f2u2Ns0Ym
} &q<8tTW5
} sy`s$Ed!
`o3d@Vc
private int size=0; )aC+qhh
EsWszpRqb
private int[] queue; j41:]6
*nc4X9
public int get() { KC(Ug4
return queue[1]; L)+ eM&W
} &\H5*A.HkA
l xfdJNb
public void remove() { iN*>Z(b"
SortUtil.swap(queue,1,size--); Vj]kJ,j\y
fixDown(1); B1M/5cr.
} 3k<#;(
file://fixdown d!t@A
private void fixDown(int k) { ,$]q2aL
int j; |gVO Iq
while ((j = k << 1) <= size) { [5VUcXGt*\
if (j < size %26amp;%26amp; queue[j] j++; PsgzDhRv
if (queue[k]>queue[j]) file://不用交换 ~ YK<T+
break; $Y`aS^IW
SortUtil.swap(queue,j,k); *o[%?$8T
k = j; l0&8vhw8k
} Wj:QC<5 v
} H5s85"U#
private void fixUp(int k) { <J)A_Kx[57
while (k > 1) { h9I)<_}R
int j = k >> 1; is(!_Iv
if (queue[j]>queue[k]) FZ9<Q
break; Fsf22
SortUtil.swap(queue,j,k); +V@=G &Ou0
k = j; aAri
} {h"\JI!
} 2eU[*x
J,O@T)S@
} k&/)g3(N(
.( h$@|Y
} <L~xR5
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SortUtil： U!/nD~A
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package org.rut.util.algorithm; O->eg
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import org.rut.util.algorithm.support.BubbleSort; _vdxxhJ=P3
import org.rut.util.algorithm.support.HeapSort; pq3 A%|
import org.rut.util.algorithm.support.ImprovedMergeSort; xLI{=sL
import org.rut.util.algorithm.support.ImprovedQuickSort; HY4E
import org.rut.util.algorithm.support.InsertSort; el?V2v[
import org.rut.util.algorithm.support.MergeSort; =&pN8PEn\
import org.rut.util.algorithm.support.QuickSort; o0G`Xn
import org.rut.util.algorithm.support.SelectionSort; c@-K
import org.rut.util.algorithm.support.ShellSort; &H&P)Px*_
LU,"i^T
/** aT!9W'uY
* @author treeroot 9r nk\`E
* @since 2006-2-2 5TneuG[OD
* @version 1.0 5ek%d
*/ J md ?
public class SortUtil { ,/6:bc:W
public final static int INSERT = 1; En9]x"_
public final static int BUBBLE = 2; h+3Z.WKhwP
public final static int SELECTION = 3; Gd-.E7CH!
public final static int SHELL = 4; {[5L96RH%
public final static int QUICK = 5; KVM@//:{
public final static int IMPROVED_QUICK = 6; (+LR u1z
public final static int MERGE = 7; BZ+ mO
public final static int IMPROVED_MERGE = 8; Q|B|#?E==
public final static int HEAP = 9; n [Xzo}
A>t!/_"
public static void sort(int[] data) { ~}IvY?!;
sort(data, IMPROVED_QUICK); L-C/Luws
} %DRy&k/T
private static String[] name={ !""!sFx)R
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *:T>~ilF
}; 4@]xn
I0HY#z%
private static Sort[] impl=new Sort[]{ id tQXwa
new InsertSort(), BgWz<k}5M
new BubbleSort(), reM
new SelectionSort(), v^],loi<V
new ShellSort(), +Bq}>
new QuickSort(), i9\\evJs
new ImprovedQuickSort(), tM$0 >E
new MergeSort(), 9U<)_E<y
new ImprovedMergeSort(), TFC!u0Y"$
new HeapSort() CoUd16*"JM
}; ]v@tZ}
H@2v<e@
public static String toString(int algorithm){ y/}VtD
return name[algorithm-1]; /s8%02S
} {{]=zt|69
^wO_b'@v
public static void sort(int[] data, int algorithm) { )qyx|D
impl[algorithm-1].sort(data); a0?iR5\
} }&(E#*>x
)pS_+ZF
public static interface Sort { => uVp
public void sort(int[] data); 8XYD L]I'
} Y-%l7GErhL
5S\][;u
public static void swap(int[] data, int i, int j) { T`g?)/
int temp = data; Z9"{f)T
data = data[j]; vzyNc'
data[j] = temp; 5xMA~I0c
} 8sR
} TRk ?8