[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; Mtn{63cK
} uJa.]J~L=
int i1=l; Fe2t[y:8h
int i2=mid+1; ;8cTy8
for(int cur=l;cur<=r;cur++){ ek d[|g
if(i1==mid+1) f||S?ns_
data[cur]=temp[i2++]; ~|ha91
else if(i2>r) wdIJ?\/763
data[cur]=temp[i1++]; rj/nn)vv;
else if(temp[i1] data[cur]=temp[i1++]; 31N5dIi,
else fn8|@)J
data[cur]=temp[i2++]; /xd|mo)D
} cDz^jC
} !E^\)=E)P
@ ZN@EOM$+
} +ijxv
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改进后的归并排序: T%E/k# )q
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package org.rut.util.algorithm.support; :bkmm,%O
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import org.rut.util.algorithm.SortUtil; }/jWa|)f
gI/(hp3ob
/** 6UU<:KH
* @author treeroot 0JW =RW
* @since 2006-2-2 u.}H)wt
* @version 1.0 j%gle%_
*/ hb1eEn
public class ImprovedMergeSort implements SortUtil.Sort { n^<J@uC
fM"&=X
private static final int THRESHOLD = 10; bpa'`sf
6cOlY= bn
/* m14'u GC
* (non-Javadoc) [{zfI`6
* BY@l:y4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Yi <1z:\
*/ Rpj{!Ia
public void sort(int[] data) { N9~'\O$'7
int[] temp=new int[data.length]; x#hSN|'"
mergeSort(data,temp,0,data.length-1); !Oi':OQG
} 2rHQ7
(~fv;}}v
private void mergeSort(int[] data, int[] temp, int l, int r) { aJ[|80U
int i, j, k; KfQ?b_H.
int mid = (l + r) / 2; sAnb
if (l == r) &d]@$4u$;
return; wJu9.
if ((mid - l) >= THRESHOLD) |Z8Eu0RSb
mergeSort(data, temp, l, mid); (IIZvCek
else &g]s@S|%
insertSort(data, l, mid - l + 1); HE0m#
if ((r - mid) > THRESHOLD) I/u>Gt
mergeSort(data, temp, mid + 1, r); B?4Iu)bCxI
else 5>hXqNjP2
insertSort(data, mid + 1, r - mid); @QE&D+NS
yTf/]H]d
for (i = l; i <= mid; i++) { vi` VK&+r
temp = data; J|([(
} H%0WD_
for (j = 1; j <= r - mid; j++) { yi2F#o 'K
temp[r - j + 1] = data[j + mid]; 3CPSyF
} E@-5L9eJ\
int a = temp[l]; q9c-UQB(!
int b = temp[r]; }/Qj8l.
for (i = l, j = r, k = l; k <= r; k++) { ]1MZ:]k
if (a < b) { 0D0uzUD-
data[k] = temp[i++]; u"8KH u5C@
a = temp; MjK<n[.
} else { IuMJ-"
data[k] = temp[j--]; t_+owiF)M
b = temp[j]; B_RF)meux
} &ViK9
} fZQ2<*)pqO
} Z6&bUZF$bE
AEUR`.
/** O^_CqT%
* @param data j}w
* @param l ^FZ9q
* @param i +^%)QH>9
*/ w*X(bua@
private void insertSort(int[] data, int start, int len) { *nEG<Y)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Y Azj>c&
} ux)Wh.5
} +W8kMuM!
} V6B[eV$D
} %g69kizoWi
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堆排序： ]$Q@4=fb
@X P_~ N
package org.rut.util.algorithm.support; .pH 4[~
n*Hx"2XF
import org.rut.util.algorithm.SortUtil; Z_>:p^id
/l8wb~vl
/** U&SSc@of
* @author treeroot 9t8ccr
* @since 2006-2-2 A,c_ME+DVB
* @version 1.0 O`Htdnu
*/ SZ:R~4 A
public class HeapSort implements SortUtil.Sort{ zoBp02j
VBW][f
/* (non-Javadoc) -b34Wz(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) IR32O,)
*/ {MUO25s02
public void sort(int[] data) { {c7@`AV]
MaxHeap h=new MaxHeap(); M XuHA?
h.init(data); .=) *Qx+
for(int i=0;i h.remove(); ONUa7
System.arraycopy(h.queue,1,data,0,data.length); j"+6aD/lv
} :*-O;Yw?S@
!uA'0U?ky
private static class MaxHeap{ {mLv?"M]
.(s@{=
void init(int[] data){ i_nUyH%b
this.queue=new int[data.length+1]; `%~f5<
for(int i=0;i queue[++size]=data; dP"cm0
fixUp(size); /=QsZ,~xo
} Wxgs66
} W#kLM\2L
8E>2 6@.
private int size=0; !/1~
s"~,Zzy@j
private int[] queue; 4C3i
u,~+ho@
public int get() { ^ '_Fd
return queue[1]; [q^pMH#U"
} !e~d,NIy
aHPx'R
public void remove() { To-$)GQ@W
SortUtil.swap(queue,1,size--); #IeG/t(
fixDown(1); \*pS4vy5x
} ClufP6'
file://fixdown ^c"\%!w"O
private void fixDown(int k) { Psm9hP :m
int j; rLbFaLeQ
while ((j = k << 1) <= size) { AP9\]qZ(7
if (j < size %26amp;%26amp; queue[j] j++; m"o=R\C
if (queue[k]>queue[j]) file://不用交换 Mb97S]878I
break; Ifq|MZ\
SortUtil.swap(queue,j,k); ~se ;L
k = j; mA#^Pv*
} jU}
} (1'sBm7F
private void fixUp(int k) { r^Soqom3
while (k > 1) { )}k"7"
int j = k >> 1; @[1,i~H
if (queue[j]>queue[k]) 9QkssI
break; *48LQzc
SortUtil.swap(queue,j,k); 1+l[P9?R[
k = j; GT3}'`f B
} m-qOyt
} CljEC1S#
[TT:^F(Y
} $GVf;M2*
@;[.#hK
} \P*%u
1Sv$!xX`n
SortUtil： 1M[|9nWUC
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package org.rut.util.algorithm; 7j"B-k#
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import org.rut.util.algorithm.support.BubbleSort; fQw|SW
import org.rut.util.algorithm.support.HeapSort; Eb8z`@p
import org.rut.util.algorithm.support.ImprovedMergeSort; GB}X
import org.rut.util.algorithm.support.ImprovedQuickSort; y;hco
import org.rut.util.algorithm.support.InsertSort; vVo# nzeZ5
import org.rut.util.algorithm.support.MergeSort; 4ijZQ
import org.rut.util.algorithm.support.QuickSort; vmW`}FKW
import org.rut.util.algorithm.support.SelectionSort; 4Cvo^k/I
import org.rut.util.algorithm.support.ShellSort; "eI">`!g
`2'*E\
/** f&XM|Bg
* @author treeroot 0b2;
* @since 2006-2-2 5'xZ9K
* @version 1.0 ^!O2Fw
*/ !V/p.O
public class SortUtil { \d w["k
public final static int INSERT = 1; myB!\WY
public final static int BUBBLE = 2; :m("oC@}
public final static int SELECTION = 3; ! n?j)p.
public final static int SHELL = 4; prxmDI
public final static int QUICK = 5; zf^@f%R
public final static int IMPROVED_QUICK = 6; 6|1#Prj
public final static int MERGE = 7; ~SEIIq
public final static int IMPROVED_MERGE = 8; ~$bQ;`,L
public final static int HEAP = 9; ,qhv(
24Htr/lPCT
public static void sort(int[] data) { 1EHNg<J(
sort(data, IMPROVED_QUICK); w Qp{z
} UZE%!OWpeK
private static String[] name={ p+{*w7?8"[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @Tsdgx8
}; tgu fU
`y.i(~^1
private static Sort[] impl=new Sort[]{ eBW]hwhKzM
new InsertSort(), d UiS0Qs}
new BubbleSort(), U9RpHh`
new SelectionSort(), jLBwPI_g
new ShellSort(), o5NrDDH
new QuickSort(), E8We2T[^M
new ImprovedQuickSort(), |U="B4
new MergeSort(), td2bL4
new ImprovedMergeSort(), y(Q.uYz*
new HeapSort() [_p&,$z8[
}; DzY`O@D[
s06R~P4
public static String toString(int algorithm){ yMf["AvG
return name[algorithm-1]; iHyA;'!Os
} qV@Hu/;
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public static void sort(int[] data, int algorithm) { +]{PEnJ
impl[algorithm-1].sort(data); Rs 0Gqx
} .eDI ZX
&E!-~'|z
public static interface Sort { jyjK~!0
public void sort(int[] data); 7me1:}4
} R<1[hH9"o
[kZe6gYP&
public static void swap(int[] data, int i, int j) { }-M%$~`
int temp = data; 1Q9eS&
data = data[j]; 79MB_Is]s
data[j] = temp; 7ZgFCK,8m,
} z^9df(
} $qhVow5~