[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; $w! v
} t&(\A,ch%
int i1=l; N6/;p]|
int i2=mid+1; wgKM6?
for(int cur=l;cur<=r;cur++){ $"{I|UFC
if(i1==mid+1) X}]g;|~SN
data[cur]=temp[i2++]; FzQ6UO~'
else if(i2>r) m^1'aO_;q
data[cur]=temp[i1++]; 9Qc=D"'
else if(temp[i1] data[cur]=temp[i1++]; ' "o2;J)7
else 24d{ol)
data[cur]=temp[i2++]; 2PVQSwW:
} esHcE{GNOS
} TZE;$:1vx>
I!g+K
} Vs&Ul6@N
4]ETF+
改进后的归并排序: q<Wz9lDMNR
2!6-+]tC
package org.rut.util.algorithm.support; Q|W~6
RjG=RfB'V
import org.rut.util.algorithm.SortUtil; Wg=4`&F^
0/b3]{skK
/** LhtA]z,m
* @author treeroot G\H|\i
* @since 2006-2-2 U$6(@&P!
* @version 1.0 >Te h ?P
*/ W0N*c*k
public class ImprovedMergeSort implements SortUtil.Sort { 2[Bw+<YA`
|&0Cuwt
private static final int THRESHOLD = 10; T2MXwd&l
wO*x0$
/* w?A6S-z
* (non-Javadoc) p!p:LSk"/b
* tD3v`Ke
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [O^mG 9
*/ <FU1|
public void sort(int[] data) { =_9grF-
int[] temp=new int[data.length]; N/eFwv.Er
mergeSort(data,temp,0,data.length-1); z%[^-l-
} 5^GrG|~
:LX (9f
private void mergeSort(int[] data, int[] temp, int l, int r) { [|oOP$u
int i, j, k; JCZ5q9b
int mid = (l + r) / 2; kk7M$)>d
if (l == r) E'F87P^>
return; 4j-%I7
if ((mid - l) >= THRESHOLD) s7na!A[
mergeSort(data, temp, l, mid); oD7^9=#
else _[ufH*
insertSort(data, l, mid - l + 1); JI[9c,N
if ((r - mid) > THRESHOLD) sGFC?1r?\
mergeSort(data, temp, mid + 1, r); OA8iTn
else aX(Y `g)|
insertSort(data, mid + 1, r - mid); T Ue=Yj
`>skcvkm
for (i = l; i <= mid; i++) { rsC^Re:*jr
temp = data; f-a+&DB9
} {t QZqqdn@
for (j = 1; j <= r - mid; j++) { 7& G#&d
temp[r - j + 1] = data[j + mid]; v L!?4k
} f!+G1z}iA
int a = temp[l]; :,FI 6`
int b = temp[r]; M07==R7
for (i = l, j = r, k = l; k <= r; k++) { ev%}\^Vl[
if (a < b) { }1pG0V4
data[k] = temp[i++]; #)EVi7UP
a = temp; j\@osjUu
} else { 'mU7N<Q$qQ
data[k] = temp[j--]; ,L9ioYbp
b = temp[j]; 9|1J pb
} *WZ?C|6+
} (eF "[,z
} }C9P--
Rkz[x
/** szU_,.\
* @param data '7/c7m/$X<
* @param l W)m\q}]FYz
* @param i -4nSiI
*/ J:Ncy}AO
private void insertSort(int[] data, int start, int len) { bf-V Q7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Y@R9+7!
} ,lr\XhO
} EZg$mp1
} %LeZd}v
} .z&,d&E
k<!xOg
堆排序： -@yu 9=DT
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package org.rut.util.algorithm.support; t{RdqAF
=6LF_=}
import org.rut.util.algorithm.SortUtil; $g!~T!p=
oBZzMTPe
/** i4^1bd
* @author treeroot -|nHwSrCZ/
* @since 2006-2-2 Iji9N!Yx
* @version 1.0 =P\Tk)(`
*/ kMY1Xb
public class HeapSort implements SortUtil.Sort{ [_wenlkm
"`8~qZ7k
/* (non-Javadoc) ?wYvBFRn7"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K1*]6x,
*/ 3lD1G~
public void sort(int[] data) { |\_d^U&`
MaxHeap h=new MaxHeap(); fPu,@ L
h.init(data); ^TCgSi7k`L
for(int i=0;i h.remove(); qJPEq%'Q
System.arraycopy(h.queue,1,data,0,data.length); w.6Gp;O
} %q)*8
QpC,komLJ
private static class MaxHeap{ .cA'6J"Bm\
:bV1M5
void init(int[] data){ DQRr(r~2Kj
this.queue=new int[data.length+1]; >xJh!w<pB
for(int i=0;i queue[++size]=data; w,v~
fixUp(size); 9$oU6#U,h
} 1feS/l$
} pXv@QD#!
t (>}
private int size=0; &S|%>C{P.w
XDcA&cM}p
private int[] queue; EAi!"NJ
|#_`aT"
public int get() { Eggdj+
return queue[1]; wEJ) h1=)^
} s`Z'5J;S
!Al?B9KJ
public void remove() { 22gk1'~dO
SortUtil.swap(queue,1,size--); .S=^)
fixDown(1); ?cdjQ@j~h
} 9XSZD93L
file://fixdown us TPr
private void fixDown(int k) { ~Dz`O"X3
int j; ?*h2:a$
while ((j = k << 1) <= size) { &mJ +#vT
if (j < size %26amp;%26amp; queue[j] j++; h8me.=S&
if (queue[k]>queue[j]) file://不用交换 WC<K(PP
break; qS{E+)P
SortUtil.swap(queue,j,k); s#*T(pY
k = j; [h^>Iq (Z
} DsZBhjCB
} 4OOH 3O
private void fixUp(int k) { pk,]yi,ZF
while (k > 1) { ,]UCq?YW)T
int j = k >> 1; 3Sb'){.MT+
if (queue[j]>queue[k]) , e6}p
break; //_aIp
SortUtil.swap(queue,j,k); Q7vTTn\
k = j; cXY;Tw45
} mqFo`Ee
} 7@*l2edXm+
E=9xiS
} ,J63?EQ3
+^\TG>le
} 1ehl=WN
i^zncDMA
SortUtil： ]&mN~$+C
uO,9h0y0W
package org.rut.util.algorithm; E,nxv+AQ
q;<=MO/
import org.rut.util.algorithm.support.BubbleSort; m5/d=k0l
import org.rut.util.algorithm.support.HeapSort; B"rfR_B2M#
import org.rut.util.algorithm.support.ImprovedMergeSort; f8c'`$O
import org.rut.util.algorithm.support.ImprovedQuickSort; bb]r
import org.rut.util.algorithm.support.InsertSort; 6bXR?0$*M.
import org.rut.util.algorithm.support.MergeSort; ToVi;
import org.rut.util.algorithm.support.QuickSort; ;&N=t64"
import org.rut.util.algorithm.support.SelectionSort; 2a3RRP
import org.rut.util.algorithm.support.ShellSort; WFTXSHcG
5!pof\/a
/** NEb M>1>^
* @author treeroot [G/ti&Od^
* @since 2006-2-2 =KctAR;
* @version 1.0 5RysN=czA
*/ <@puWm[p
public class SortUtil { >m-VBo
public final static int INSERT = 1; BlrZ<\-/
public final static int BUBBLE = 2; (ndTEnpp
public final static int SELECTION = 3; L~u@n24
public final static int SHELL = 4; !iO%?nW;
public final static int QUICK = 5; S);SfNh%CL
public final static int IMPROVED_QUICK = 6; )*wM DM5q
public final static int MERGE = 7; E1&9( L5
public final static int IMPROVED_MERGE = 8; +%%Ef]
public final static int HEAP = 9; }+{? Ms
} qf=5v
public static void sort(int[] data) { f=L&>X
sort(data, IMPROVED_QUICK); |pA
} g$N/pg2>cT
private static String[] name={ [10y13
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6|Qg=4_FHt
}; sG6ts,={
t(RJc
private static Sort[] impl=new Sort[]{ Mt93YD-2+
new InsertSort(), :~Z-K\
new BubbleSort(), }CCTz0[D"
new SelectionSort(), H>qw@JiO!
new ShellSort(), aGR!T{`
new QuickSort(), "nzQ$E>?$
new ImprovedQuickSort(), 9 Y-y?Y
new MergeSort(), J:!m49fF
new ImprovedMergeSort(), p!OCF]r
new HeapSort() dN%*-p(
}; Fzc8)*w
8`{)1.d5[
public static String toString(int algorithm){ 'kC,pN{->
return name[algorithm-1]; m'b9 f6
} MN.h,^b
Ddr.kXIpo
public static void sort(int[] data, int algorithm) { 2.>WR~\
impl[algorithm-1].sort(data); 4.7 PL
} y_7lSo8<
QQPT=_P]
public static interface Sort { Mkj`
public void sort(int[] data); |K(2_Wp
} jgW-&nK!
vo]!IY
public static void swap(int[] data, int i, int j) { `;7eu=
int temp = data; 6Bop8B
data = data[j]; bl8EzO
data[j] = temp; ^]cl:m=*
} =,])xzG%
} T{"[Ih3Mbl