[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; z]7/Gc,j
} E>+>!On)b
int i1=l; yzT4D>1,
int i2=mid+1; !2h ZtX
for(int cur=l;cur<=r;cur++){ 6?'7`p
if(i1==mid+1) te4=
data[cur]=temp[i2++]; k!Q{u2
else if(i2>r) eR0$CTSw
data[cur]=temp[i1++]; DD2K>1A1
else if(temp[i1] data[cur]=temp[i1++]; .+,U9e:%
else "9 f+F
data[cur]=temp[i2++]; 6$[7hlE
} U*b7 Pxq;
} Z?xRSi2~7
3)yL#hXg)
} xHMFYt+0$G
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改进后的归并排序: SL-;h#-y 4
PD&gC88
package org.rut.util.algorithm.support; )2_[Ww|.
-n8d#Qm)
import org.rut.util.algorithm.SortUtil; 9:P]{}
W.NZ%~|+e/
/** <{GVA0nr
* @author treeroot uFhaN\S
* @since 2006-2-2 A; wT`c
* @version 1.0 UWidT+'Sa
*/ J ZkQ/vp(
public class ImprovedMergeSort implements SortUtil.Sort { Ptf(p`
a>x6n3{
private static final int THRESHOLD = 10; 'qvj[lpGr
z_N";Rn
/* BlQX$s]
* (non-Javadoc) X8">DR&>Y
* u~aRFQ:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Qz3Z_V4k9
*/ 5C&*PJ~WA
public void sort(int[] data) { 4hODpIF
int[] temp=new int[data.length]; SiUu**zC
mergeSort(data,temp,0,data.length-1); $rI 1|;^
} Fn7OmxfD
vENf3;o0
private void mergeSort(int[] data, int[] temp, int l, int r) { mf)+ 5On
int i, j, k; pQKSPr
int mid = (l + r) / 2; u>n"FL'e
if (l == r) bMxK@$G~
return; |-G2pu;
if ((mid - l) >= THRESHOLD) 4eY?#8
mergeSort(data, temp, l, mid); !nCq8~#
else 1"L"LU'
insertSort(data, l, mid - l + 1); !~yBzH;K
if ((r - mid) > THRESHOLD) bi^?SH\
mergeSort(data, temp, mid + 1, r); E^zfI9R
else oFf9KHorW
insertSort(data, mid + 1, r - mid); T4HJy|
t:5-Ro
for (i = l; i <= mid; i++) { 50j8+xJPV
temp = data; yji[Yde;|
} BqY_N8l&E
for (j = 1; j <= r - mid; j++) { wV"`Du7E;
temp[r - j + 1] = data[j + mid]; "J`&"_CyZ
} 9&5<ZC-D
int a = temp[l]; [d8Q AO1;)
int b = temp[r]; RGE(#
for (i = l, j = r, k = l; k <= r; k++) { 80wzn,o S
if (a < b) { ,_fz)@)
data[k] = temp[i++]; +)iMJ]>
a = temp; 6:O<k2=2
} else { }}{n|l+R5
data[k] = temp[j--]; 8v4 o+wP
b = temp[j]; kB> ~Tb0
} IF|6iKCE
} yjg&/6
} 6FQi=}O1
*Bq}.Yn
/** s:Ml\['x
* @param data +7^p d9F.
* @param l 1J4Pnl+hN
* @param i 1(Ta*"(0Ip
*/ :t{~Mi=T
private void insertSort(int[] data, int start, int len) { ]MV8rC[\
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); w_xca(
} $Sgf jm
} UnF8#~
} 6JDHwV
} >w@+cUto
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堆排序： @)?]u U"L
? T6K]~g
package org.rut.util.algorithm.support; OegeZV
AQlB_@ b
import org.rut.util.algorithm.SortUtil; &(rWl`eTY`
i(^U<DW$
/** {P]C>
* @author treeroot W(`QbNJ
* @since 2006-2-2 rtRbr_
* @version 1.0 S3E,0%yo+)
*/ xi=ApwNj
public class HeapSort implements SortUtil.Sort{ pn gto
rP3HR5
/* (non-Javadoc) ^Tm`motzh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ki\.w~Qs
*/ *h!fqT%9
public void sort(int[] data) { _U<fS
MaxHeap h=new MaxHeap(); /|1p7{km
h.init(data); /Vn>(;lo
for(int i=0;i h.remove(); !Qe;oMqy}
System.arraycopy(h.queue,1,data,0,data.length); aa`(2%(:
} ej`%}e%2
?;XEb\Kf
private static class MaxHeap{ t'rN7.d
kI^* '=:
void init(int[] data){ _\}'5nmw\
this.queue=new int[data.length+1]; d,V#5l-6
for(int i=0;i queue[++size]=data; ,Of^xER`
fixUp(size); O1J&Lwpk,
} q8v[u_(yD
} -3EQRqVg
f"QiVJq
private int size=0; (+> 2&@@<
[1VA`:?W
private int[] queue; QPJ\Iu@D$
elOeXYO0
public int get() { {r,Uik-nL
return queue[1]; wA=r]BT
} ,#A(I#wL~
Ymk?@mV4
public void remove() { Gt9$hB7
SortUtil.swap(queue,1,size--); \k.`xG?
fixDown(1); ?Z7`TnG$uf
} r~t`H*C)}
file://fixdown jxh:z
private void fixDown(int k) { jwDlz.sW!
int j; @ _Ey"k<
while ((j = k << 1) <= size) { r]DiB:.
if (j < size %26amp;%26amp; queue[j] j++; }TmOoi(X@
if (queue[k]>queue[j]) file://不用交换 ~~tTr$
break; %ou,|Dww
SortUtil.swap(queue,j,k); {ez$kz
k = j; `>gG"1,]
} wA"@t
} !Zz;;Z
private void fixUp(int k) { $MQ}+*Wr
while (k > 1) { zX>W 8P
int j = k >> 1; >lQo _p(;
if (queue[j]>queue[k]) 1-KNXGb'
break; KA5)]UF`l
SortUtil.swap(queue,j,k); gg'1q3OjM
k = j; CLR1CGnn7
} =}^NyLE?
} (vs<Fo|]
*'<AwG&
} M!UTqf7XL
2Je$SE8
} .DCHc,DxA
9%!h/m>rW
SortUtil： [GLH8R
BG>Y[u\N
package org.rut.util.algorithm; "yn~axk7
)ZG;.j
import org.rut.util.algorithm.support.BubbleSort; 3o<d=@`r
import org.rut.util.algorithm.support.HeapSort; )dXa:h0RZ
import org.rut.util.algorithm.support.ImprovedMergeSort; _bFUr
import org.rut.util.algorithm.support.ImprovedQuickSort; M";qo6
import org.rut.util.algorithm.support.InsertSort; p4' .1.@
import org.rut.util.algorithm.support.MergeSort; {VgE07r
import org.rut.util.algorithm.support.QuickSort; fE#(M+(<
import org.rut.util.algorithm.support.SelectionSort; ')X(P>
import org.rut.util.algorithm.support.ShellSort; DXFu9RE\{
51#*8u+L
/** $ V^gFes
* @author treeroot p@m0Oi,=
* @since 2006-2-2 n ~t{]if"
* @version 1.0 qpjY &3SI
*/ 1Ms[$$b$
public class SortUtil { *LT~:Gs#
public final static int INSERT = 1; g9_zkGc7
public final static int BUBBLE = 2; ~wvt:E,fC
public final static int SELECTION = 3; d+9V% T
public final static int SHELL = 4; ]ss[n.T0*
public final static int QUICK = 5; zA,vp^
public final static int IMPROVED_QUICK = 6; CWj_K2=d
public final static int MERGE = 7; D tsZP (
public final static int IMPROVED_MERGE = 8; I= mz^c{
public final static int HEAP = 9; XHr*Rs.[=
w+M/VsL
public static void sort(int[] data) { {!"UBALxc
sort(data, IMPROVED_QUICK); *$tXm4 O[
} 3<0b_b
private static String[] name={ )DSeXS[ e
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (`x_MTLL
}; fqNh\~kja
[GwAm>k
private static Sort[] impl=new Sort[]{ TBj2(Z
new InsertSort(), DeO-@4+qKd
new BubbleSort(), h<9s& p
new SelectionSort(), jUe@xis<T
new ShellSort(), o2/:e
new QuickSort(), s\*L5{kiSl
new ImprovedQuickSort(), 4>JSZ6i#n
new MergeSort(), KkvcZs'4m
new ImprovedMergeSort(), L4By5)
new HeapSort() ^QK`z@B
}; twT/uBQ4a
-'rdN i
public static String toString(int algorithm){ X+hHEkJ
return name[algorithm-1]; N5 ME_)
} Ltlp9 S
w:&""'E
public static void sort(int[] data, int algorithm) { 2M %j-yG"
impl[algorithm-1].sort(data); W5*ldXXk
} 5{c;I<0
%xt9k9=vZ
public static interface Sort { "TZq")-
public void sort(int[] data); (lk9](;L
} Z}W{ iD{
fr17|#L+s
public static void swap(int[] data, int i, int j) { ( }-*irSsj
int temp = data; HiCh:IP7>/
data = data[j]; EX8JlA\-W
data[j] = temp; %I1@{>OxG
} PmR].Ohzi
} > p`,