[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; <)9y{J}s:
} )`:UP~)H
int i1=l; ]Ze1s02(
int i2=mid+1; \e*]Ls#jS
for(int cur=l;cur<=r;cur++){ 0kh6@y3
if(i1==mid+1) M%HU4pTW#o
data[cur]=temp[i2++]; I9Xuok!0>=
else if(i2>r) ye&;(30Oq
data[cur]=temp[i1++]; nlP;nlW
else if(temp[i1] data[cur]=temp[i1++]; ~ljXzD93Z
else 0J9x9j`&j
data[cur]=temp[i2++]; lA]8&+,ZM
} ?,mmYW6TjB
} 1}x%%RD_
HJ"GnZp<
} afVT~Sf{
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改进后的归并排序: +7Gwg
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package org.rut.util.algorithm.support; -w2/w@&
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import org.rut.util.algorithm.SortUtil; K-v#.e4
D*jM1w_`
/** -@'FW*b
* @author treeroot Lbgi7|&
* @since 2006-2-2 Q,g\
* @version 1.0 dO'(2J8
*/ {: /}NpA$
public class ImprovedMergeSort implements SortUtil.Sort { 5m@V#2^P
?<!|
private static final int THRESHOLD = 10; oH@78D0A
Nn6%9PX_)
/* 6k%f
* (non-Javadoc) e~OpofJNb
* 2y4bwi
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *dQSw)R
*/ ES[G
public void sort(int[] data) { f*Hr^b}`8
int[] temp=new int[data.length]; i-1op> Y
mergeSort(data,temp,0,data.length-1); &C}*w2]0S
} =_CzH(=f#
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private void mergeSort(int[] data, int[] temp, int l, int r) { [Xkx_B
int i, j, k; _a, s )
int mid = (l + r) / 2; ,1`z"7\W
if (l == r) \fOEqe*5SM
return; pa+hL,w{6
if ((mid - l) >= THRESHOLD) #!=tDc &
mergeSort(data, temp, l, mid); VbYdZCC
else ZJoM?g~WFI
insertSort(data, l, mid - l + 1); }f ?y* H
if ((r - mid) > THRESHOLD) mH(:?_KrS-
mergeSort(data, temp, mid + 1, r); zLQx%Yg!
else }MySaL>
insertSort(data, mid + 1, r - mid); w0. u\
+{]j]OP
for (i = l; i <= mid; i++) { g)-te+?6
temp = data; 5P bW[
} PCA4k.,T
for (j = 1; j <= r - mid; j++) { [),ige
temp[r - j + 1] = data[j + mid]; C!gZN9-
} F|8&
int a = temp[l]; ?6!LL5a.
int b = temp[r]; P}iE+Z3
for (i = l, j = r, k = l; k <= r; k++) { +`4A$#$+y
if (a < b) { T{"(\X$
data[k] = temp[i++]; lE;!TQj:X
a = temp; bA 2pbjg=
} else { @Qe0! (_=
data[k] = temp[j--]; Z+SRXKQ
b = temp[j]; \U0Q<ot/7
} S:}7q2:
} ceA9){
} }V>T M{
Om&Dw|xG8
/** ~DWl s.
* @param data vO=fP_
* @param l cQ|NJ_F{1
* @param i XppOU
*/ ZCw]m#lS
private void insertSort(int[] data, int start, int len) { NK+o1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); KvSG;
} ooGM$U
} Gj*9~*xm(
} %O<BfIZ
} x-c"%Z|
bt *k.=p
堆排序： -j(6;9"7]|
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package org.rut.util.algorithm.support; -Za/p@gM
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import org.rut.util.algorithm.SortUtil; }]TxlSp!;
I fir ,8
/** INf&4!&h
* @author treeroot CLSK'+l
* @since 2006-2-2 Xj*Wu_
* @version 1.0 hZ3bVi)L\
*/ E`q_bn
public class HeapSort implements SortUtil.Sort{ #$vEGY}1
8L XHk l
/* (non-Javadoc) G3]4A&h9v~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E7hhew
*/ zDp2g)
public void sort(int[] data) { Z)!C'cb
MaxHeap h=new MaxHeap(); J4utIGF
h.init(data); 6zkaOA46V
for(int i=0;i h.remove(); B!yr!DWv
System.arraycopy(h.queue,1,data,0,data.length); 3T 9j@N77
} -&f$GUTJ
|{;G2G1[
private static class MaxHeap{ s{++w5s
:,^gj
void init(int[] data){ K,]=6Rj
this.queue=new int[data.length+1]; Vi}_{ Cy
for(int i=0;i queue[++size]=data; neh(<>
fixUp(size); ;4a{$Lw~^9
} ;jPXs
} 5xde;
u-TUuP
private int size=0; wzaV;ac4K
,Q,^3*HX9}
private int[] queue; Q?T]MUY(L
hph4`{T
public int get() { h![#;>(
return queue[1]; f?b"iA(6
} >7r!~+B"9'
,[Fb[#Qqb
public void remove() { l,:F
SortUtil.swap(queue,1,size--); Q&&@v4L
fixDown(1); t5zKW _J7
} %SI'BJ
file://fixdown 4YHY7J
private void fixDown(int k) { z2c6T.1M
int j; tDo"K3
while ((j = k << 1) <= size) { fnY.ao1-s[
if (j < size %26amp;%26amp; queue[j] j++; +#By*;BJ
if (queue[k]>queue[j]) file://不用交换 vy/-wP|1
break; ]9XDS[<2`
SortUtil.swap(queue,j,k); SaCh 7 ^
k = j; :EH=_"
} /bEAK-
} G:JR7N$
private void fixUp(int k) { k8Xm n6X
while (k > 1) { C?Ucu]cW
int j = k >> 1; __@BUK{q
if (queue[j]>queue[k]) YP9^Bp{0
break; 9cgUT@a
SortUtil.swap(queue,j,k); zJXplvaL;
k = j; C>~TI,5a3
} />Nt[o[r
} s(^mZ -i
R4@6G&2d>
} ^(<f/C)i
@KA4N`
} V:27)]q
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SortUtil： K>9 ()XT)
fatf*}eln
package org.rut.util.algorithm; >MK98(F
9Ee'Cm
import org.rut.util.algorithm.support.BubbleSort; sr}E+qf
import org.rut.util.algorithm.support.HeapSort; i&k7-<
import org.rut.util.algorithm.support.ImprovedMergeSort; 6Iw\c
import org.rut.util.algorithm.support.ImprovedQuickSort; TKjFp%
import org.rut.util.algorithm.support.InsertSort; ~4"dweu?
import org.rut.util.algorithm.support.MergeSort; o.\oA6P_
import org.rut.util.algorithm.support.QuickSort; !wp3!bLp
import org.rut.util.algorithm.support.SelectionSort; <1pEwI~
import org.rut.util.algorithm.support.ShellSort; +)?J#g
E e]-qN*8
/** B;WCTMy}
* @author treeroot q9NoI(]e
* @since 2006-2-2 _FEFx
* @version 1.0 Nluoqoac
*/ _rYkis^u
public class SortUtil { 1sCR4L:+
public final static int INSERT = 1; <ih[TtZ
public final static int BUBBLE = 2; -![|}pX
public final static int SELECTION = 3; +*^H#|!
public final static int SHELL = 4; }-fl$j?9E
public final static int QUICK = 5; 'n|5ZhXPB
public final static int IMPROVED_QUICK = 6; 6^Sa;
public final static int MERGE = 7; XlJZhc
public final static int IMPROVED_MERGE = 8; \?N2=jsu$
public final static int HEAP = 9; - YV>j
.mAjfP*
public static void sort(int[] data) { fAmz4
sort(data, IMPROVED_QUICK); y==CTY@
} $SE^S
private static String[] name={ 1.X@;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" pNIf=lA
}; y?:.;%!E
X7wKy(g
private static Sort[] impl=new Sort[]{ O~QB!<Q+
new InsertSort(), `XB 9Mi=
new BubbleSort(), g1o8._f.
new SelectionSort(), 3,=6@U
new ShellSort(), $g7<Y*t[
new QuickSort(), !a<ng&H^U
new ImprovedQuickSort(), v}x&?fU `
new MergeSort(), Z)\@i=m
new ImprovedMergeSort(), K@#L)VT!
new HeapSort() :@)>r9N
}; MS]r:X6
[9 RR8
public static String toString(int algorithm){ EZj9wd"u
return name[algorithm-1]; 3Y~>qGQwh
} 9K&:V(gmw
h}EPnC}
public static void sort(int[] data, int algorithm) { rbCAnwA2
impl[algorithm-1].sort(data); 7yba04D)
} Lxk[;j+
rD>f|kA?L
public static interface Sort { ZW}_Qs
public void sort(int[] data); mQ=#nk$~g
} L:8q8i
IMfqiH)
public static void swap(int[] data, int i, int j) { )/EO&F
int temp = data; 'ah[(F<*@e
data = data[j]; \G3rX9xG
data[j] = temp; X|8c>_}
} F/A|(AH'
} Ow077v?