[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; *6Ojv- G|5
} bp'qrcFuiL
int i1=l; (WW*yv.J
int i2=mid+1; >g):xi3qK
for(int cur=l;cur<=r;cur++){ aY/msplC
if(i1==mid+1) $~#N1
data[cur]=temp[i2++]; 994
else if(i2>r) ."N`X\
data[cur]=temp[i1++]; x2P}8Idg?A
else if(temp[i1] data[cur]=temp[i1++]; me-:A:si
else /3MTutM|<X
data[cur]=temp[i2++]; lnXb]tm;
} pt"yJtM'P
} qbrf;`
yMdAe>@
} 6usy0g D
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改进后的归并排序: Lk%u(duU^
6$]p;}#
package org.rut.util.algorithm.support; _h@s)"
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import org.rut.util.algorithm.SortUtil; 5if4eitS
]6W;~w%
/** e ]@Ex
* @author treeroot (}$~)f#s
* @since 2006-2-2 6mawcK:7
* @version 1.0 qDOJ;>I
*/ 2u0dn?9\
public class ImprovedMergeSort implements SortUtil.Sort { C'iJFfgR
IaxzkX_48
private static final int THRESHOLD = 10; .EOHkhn
XHKVs
/* (kECV8)2
* (non-Javadoc) ZBDEE+8e
* (-lu#hJ`&r
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N8$MAW
*/ /xK5%cE>B
public void sort(int[] data) { O@.afk"{
int[] temp=new int[data.length]; nm[ yp3B
mergeSort(data,temp,0,data.length-1); ##%R|P3
} R]oi&"H@r)
T?!&a0
private void mergeSort(int[] data, int[] temp, int l, int r) { O2W EA
int i, j, k; ?[[K6v}q{
int mid = (l + r) / 2; 4JF8S#8B
if (l == r) \\j98(i
return; 8QFn/&Ql$B
if ((mid - l) >= THRESHOLD) i.4L;(cg
mergeSort(data, temp, l, mid); v>vU]6l
else Rp#9T?i``[
insertSort(data, l, mid - l + 1); Ivw+U-Mz
if ((r - mid) > THRESHOLD) $gYy3y
mergeSort(data, temp, mid + 1, r); QK+s}ny
else MoKGnb
insertSort(data, mid + 1, r - mid); G4!$48
(#w8/@JxF
for (i = l; i <= mid; i++) { J- %YmUc)
temp = data; rUunf'w`e1
} qXHr[C"
for (j = 1; j <= r - mid; j++) { zTFfft<
temp[r - j + 1] = data[j + mid]; -0KQR{LI
} $Cr? }'a
int a = temp[l]; )~hsd+ 0t
int b = temp[r]; !Ua74C
for (i = l, j = r, k = l; k <= r; k++) { R~-r8dWcw
if (a < b) { F",S}cK*MH
data[k] = temp[i++]; <h_lc}o/
a = temp; ;pU#3e+P8
} else { L{>XT
data[k] = temp[j--]; X#s:C=q1
b = temp[j]; !}sYPz]7!
} OL{U^uOhY
} m6qmZ2<
} u8Ul +u
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/** |TOz{
* @param data $qN+BKd]3
* @param l cJ 5":^O
* @param i i!/V wGg
*/ C[j'0@~V:B
private void insertSort(int[] data, int start, int len) { T)o)%Yv
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `jR= X
} URW#nm?
} M5C}*c9
} 9v(&3,)a
} 5a9PM(
v=b`kCH}
堆排序： xg~ Baun
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package org.rut.util.algorithm.support; K5x&:z
#]G$o?@Y=^
import org.rut.util.algorithm.SortUtil; 8-cB0F=j_
a#X[V5|6Q
/** s[:e '#^
* @author treeroot -\;x>=#B
* @since 2006-2-2 e![|-m%
* @version 1.0 IX eb6j8
*/ thk33ss:
public class HeapSort implements SortUtil.Sort{ CtbmX)vE
;9,<&fe
/* (non-Javadoc) ;0V{^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XVi?-/2
*/ X*F#=.lh
public void sort(int[] data) { }U$Yiv
MaxHeap h=new MaxHeap(); A_: Bz:
h.init(data); YQ>M&lnQ<
for(int i=0;i h.remove(); [guJd";
System.arraycopy(h.queue,1,data,0,data.length); ~4th;#'
} @?_<A%hz
S#{e@ C
private static class MaxHeap{ M%f96XUM
i(q%EMf
void init(int[] data){ H*_:IfI!
this.queue=new int[data.length+1]; #uNQ+US0
for(int i=0;i queue[++size]=data; c ?mCt0Cg
fixUp(size); Bb];qYuCO
} .bbl-a/ 3
} -yt[0
7O{c>@\
private int size=0; /?l@7
P@'<OI
private int[] queue; RE]u2R6Y
,.u7([SGm
public int get() { s OD>mc#%Y
return queue[1]; _yTGv-
} ' }rUbJo
8D eRs#
public void remove() { z65|NO6JW.
SortUtil.swap(queue,1,size--); SP9_s7LL
fixDown(1); x72bufd
} ' jFSv|g+0
file://fixdown '+BcPB?E
private void fixDown(int k) { \H+/D &M
int j; 4os7tx
while ((j = k << 1) <= size) { Wa~'p+<c~b
if (j < size %26amp;%26amp; queue[j] j++; pR2QS
if (queue[k]>queue[j]) file://不用交换 ev>gh0
break; 1R)4[oYN\<
SortUtil.swap(queue,j,k); j+Nun
k = j; KFHn)+*"
} UJ1Ui'a(!!
} D0,U2d
private void fixUp(int k) { 2.O;
while (k > 1) { i'|rx2]e
int j = k >> 1; xtL_,ug
if (queue[j]>queue[k]) Z^9;sb,x
break; 7g3vh%G.
SortUtil.swap(queue,j,k); *M;!{)m?
k = j; -~eNC^t;W
} !+&"y K@J
} Kx?3]
qve2?,i8hM
} yyfm
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} ~a&s5E {
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SortUtil： ),5^bl/
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package org.rut.util.algorithm; 9RwD_`D(MN
HF}%Ow
import org.rut.util.algorithm.support.BubbleSort; } pE<P;\]k
import org.rut.util.algorithm.support.HeapSort; ;1}~(I#Y
import org.rut.util.algorithm.support.ImprovedMergeSort; qsXK4`
import org.rut.util.algorithm.support.ImprovedQuickSort; jdV E/5
import org.rut.util.algorithm.support.InsertSort; !"B0z+O>
import org.rut.util.algorithm.support.MergeSort; h9c54Ux
import org.rut.util.algorithm.support.QuickSort; o~H4<ayy
import org.rut.util.algorithm.support.SelectionSort; Da5Zz(
import org.rut.util.algorithm.support.ShellSort; ]+Yd#<j(u
A-r-^S0\
/** hZ-No
* @author treeroot UOH2I+@V
* @since 2006-2-2 5+dQGcE@
* @version 1.0 V*SKWP
*/ +=hiLfnE
public class SortUtil { M >Yx_)<U
public final static int INSERT = 1; :9q=o|T6D
public final static int BUBBLE = 2; #4_'%~-e
public final static int SELECTION = 3; zbZ0BD7e
public final static int SHELL = 4; \D>vdn"Lx
public final static int QUICK = 5; l)GV&V
public final static int IMPROVED_QUICK = 6; Ee;&;Q,O.z
public final static int MERGE = 7; D%kY
public final static int IMPROVED_MERGE = 8; P31}O2 Nh
public final static int HEAP = 9; i]gF 6:&
L=ZKY
public static void sort(int[] data) { K.G}*uy
sort(data, IMPROVED_QUICK); F`-|@k
} w;}pebL:
private static String[] name={ ECqcK~h#E
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Y!* \=h6h
}; B!H46w~
54s+4R FL
private static Sort[] impl=new Sort[]{ $J&wwP[
new InsertSort(), ENm\1
new BubbleSort(), :%Na-j9hV)
new SelectionSort(), Xu $_%+46
new ShellSort(), @x?7J@:
new QuickSort(), v.H00}[.
new ImprovedQuickSort(), i6M_Gk}
new MergeSort(), Au,xIe!t
new ImprovedMergeSort(), msOk~ZPE6\
new HeapSort() OoTMvZP[
}; vBAds
7H~StdL/>
public static String toString(int algorithm){ i]!CH2\
return name[algorithm-1]; UbKdB
} TWkuR]5
W-zD1q~0?
public static void sort(int[] data, int algorithm) { _P.+[RS@
impl[algorithm-1].sort(data); p*E_Po
} ) D:M_T2
(5rH72g(
public static interface Sort { 4tU3+e5h
public void sort(int[] data); 2i`N26On
} H5uWI
6O8'T`F[
public static void swap(int[] data, int i, int j) { 0\#uxzdhJ
int temp = data; DZKVZ_q
data = data[j]; O?|opD
data[j] = temp; q\*",xZxwz
} X>l
} @1ZLr