[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; LSR{N|h+)
} +/bT4TkML
int i1=l; yX%Xjo__*t
int i2=mid+1; !`3q9RT3."
for(int cur=l;cur<=r;cur++){ l"I G;qO.
if(i1==mid+1) 9]{(~=D7
data[cur]=temp[i2++]; , ;'y <GA
else if(i2>r) ;^Q- 1
data[cur]=temp[i1++]; $50/wb6s
else if(temp[i1] data[cur]=temp[i1++]; Gk!06
else $P9'"a)Lm
data[cur]=temp[i2++]; yX^/Oc@j
} Rh[%UNl
} @Kx@ 2#~b
s/;iZiWK
} 8f\sG:$
X9J&OQ[W
改进后的归并排序: cv .R`)l
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package org.rut.util.algorithm.support; =B0#z]qu
Gu3# y"a>
import org.rut.util.algorithm.SortUtil; &YSjwRr
d".Xp4}f
/** gPo3jwo$
* @author treeroot |#y+iXTJ
* @since 2006-2-2 z'FpP
* @version 1.0 E{Tvjh+
*/ J%Cn
public class ImprovedMergeSort implements SortUtil.Sort { @v#]+9F
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private static final int THRESHOLD = 10; Wfw6(L
N"tEXb/,
/* H=_ Wio
* (non-Javadoc) BIBBp=+
* mbij& 0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O|5Z-r0<
*/ _P^ xX'v
public void sort(int[] data) { ,#NH]T`c1
int[] temp=new int[data.length]; C78V/{
mergeSort(data,temp,0,data.length-1); *dTI4k
} o7qZy |\4S
>=T\=y
private void mergeSort(int[] data, int[] temp, int l, int r) { &Z.zem?n
int i, j, k; l8$7N=Y
int mid = (l + r) / 2; bv%A;
if (l == r) %,Pwo{SH
return; CDNh9`
if ((mid - l) >= THRESHOLD) "_g3{[es!
mergeSort(data, temp, l, mid); 9d\B*OU
else UBgheu
insertSort(data, l, mid - l + 1); Xy0KZ !
if ((r - mid) > THRESHOLD) ZwC\n(_y
mergeSort(data, temp, mid + 1, r); |#87|XIJ&~
else w9Eb\An
insertSort(data, mid + 1, r - mid); MPexc5_
m(CbMu
for (i = l; i <= mid; i++) { 6 4fB$
temp = data; =;) M+"
} ogOUrJ}P
for (j = 1; j <= r - mid; j++) { QSaJb?I
temp[r - j + 1] = data[j + mid]; 8[z<gxP`?
} K}r@O"6*\
int a = temp[l]; |i}5vT78
int b = temp[r]; _ ?\4k{ET
for (i = l, j = r, k = l; k <= r; k++) { O%>FKU>(?
if (a < b) { R*DQm
data[k] = temp[i++]; 3U_,4qf
a = temp; c`F~vrr)X
} else { 2l8TX#K
data[k] = temp[j--]; "K!9^!4&
b = temp[j]; ZRK1UpP
} Fz3QSr7FU
} iG.qMf.
} _#kjiJj*
y[pU8QSt
/** 8,5H^Bi
* @param data ~ sC<V
* @param l viLK\>>
* @param i Ot^<:\<`G
*/ A`H&"A
private void insertSort(int[] data, int start, int len) { ]tu:V,q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); o#X=1us
} *Dz<Pi^
} 'QMvj` -
} jn+M L&
} _YT9zG
e%B;8)7
堆排序： :epjJ1mW
x}c%8dO#J
package org.rut.util.algorithm.support; G;'=#c ^
B!z-O*fLE1
import org.rut.util.algorithm.SortUtil; _LOV&83O(
3hPj;-u
/** K<3$>/|
* @author treeroot y5v}EX`m&
* @since 2006-2-2 w<4,;FFlZ/
* @version 1.0 .t7mTpi
*/ s--\<v
public class HeapSort implements SortUtil.Sort{ :J'ibb1
5W(S~}
/* (non-Javadoc) 2f=7`1RCD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 60A E~
*/ .QaHE`e{
public void sort(int[] data) { cSkJlhwNn
MaxHeap h=new MaxHeap(); m V U(b,
h.init(data); hZudVBn
for(int i=0;i h.remove(); 4Y=sTXbFt
System.arraycopy(h.queue,1,data,0,data.length); ZRjqjx
} p{sbf;-x}
Ga%x(1U[&
private static class MaxHeap{ &>0ape
il)LkZ@
void init(int[] data){ LvtZZX6!
this.queue=new int[data.length+1]; _;M46o%h
for(int i=0;i queue[++size]=data; y'a(>s(
fixUp(size); P/'9k0zs)
} )RQX1("O
} X~H~k1
TC2gl[
private int size=0; 5_d=~whO&2
0%m}tfQ5
private int[] queue; xEA%UFB.!G
X1P_IB
public int get() { vfh0aW-O
return queue[1]; azUEp8`|
} >-~2:d\M3
q$;'Fy%oy
public void remove() { xSQ0]vE
SortUtil.swap(queue,1,size--); C&\vVNV;9
fixDown(1); 6Wos6_
} ~+y0UEtq7
file://fixdown 6iozb~!Rr
private void fixDown(int k) { ATeXOe
int j; {GaQV-t
while ((j = k << 1) <= size) { B>^5h?(lt
if (j < size %26amp;%26amp; queue[j] j++; l*+"0
if (queue[k]>queue[j]) file://不用交换 :\0q\2e[<
break; U2tsHm.O
SortUtil.swap(queue,j,k); S+i .@N.^
k = j; "!yKX(aTX
} 4LCgQS6
} "hRY+{m
private void fixUp(int k) { {(DD~~)D
while (k > 1) { ~dIb>[7wy
int j = k >> 1; LNp%]*h
if (queue[j]>queue[k]) iwHy!Vi-5
break; 6zQ {Y"0
SortUtil.swap(queue,j,k); ZOFhX$I
k = j; XsldbN^6
} 2u[:3K-@,
} ,_66U;T
;%1ob f 89
} =5P_xQx
pai>6p
} (8!#<$
eQk ~YA]K
SortUtil： )e)@_0
TtL2}Wdd.%
package org.rut.util.algorithm; ,w.`(?I/
#5?Q{ORN o
import org.rut.util.algorithm.support.BubbleSort; Yx_[vLm
import org.rut.util.algorithm.support.HeapSort; )OqN\
import org.rut.util.algorithm.support.ImprovedMergeSort; PmtBu`OkV
import org.rut.util.algorithm.support.ImprovedQuickSort; IJ^KYho
import org.rut.util.algorithm.support.InsertSort; >'i d/
import org.rut.util.algorithm.support.MergeSort; #vy:aq<bjE
import org.rut.util.algorithm.support.QuickSort; U.oxLbJ`
import org.rut.util.algorithm.support.SelectionSort; (~oUd4
import org.rut.util.algorithm.support.ShellSort; ]fXMp*LvY
'3>kDH+
/** 1#AdEd[
* @author treeroot v>3)^l:=Y*
* @since 2006-2-2 9=&e5Oq}
* @version 1.0 QZBXI3%#s
*/ Sf}>~z2
public class SortUtil { |Xblz1>DF
public final static int INSERT = 1; IMY?L
public final static int BUBBLE = 2; d7A08l{
public final static int SELECTION = 3; pRtxyL"y
public final static int SHELL = 4; 47_4`rzy;
public final static int QUICK = 5; ?~rF3M.=|
public final static int IMPROVED_QUICK = 6; O)MKEMuA
public final static int MERGE = 7; ^R.#n[-r2
public final static int IMPROVED_MERGE = 8; 0&U,WA
public final static int HEAP = 9; Xj^6ZJc
G7k0P-r,0
public static void sort(int[] data) { $Yt29AQ
sort(data, IMPROVED_QUICK); \#5t%t
} M}4%LjD
private static String[] name={ O6P0Am7s
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" W[o~AbU
}; a z 7Vy-
UXvk5t1
private static Sort[] impl=new Sort[]{ %T*lcg
new InsertSort(), T0WB
new BubbleSort(), buo_H@@p{s
new SelectionSort(), rt%.IQdY
new ShellSort(), *b?C%a9
new QuickSort(), ?H7*?HV
new ImprovedQuickSort(), - Z"w
new MergeSort(), oC>QJ(o,8
new ImprovedMergeSort(), . m_y5J
new HeapSort() L0SeG:
}; &I.UEF2,
mt7}1s,i[
public static String toString(int algorithm){ /%Bc*k=ox
return name[algorithm-1]; sk!v!^\_r
} Wy%q9x]}
QP|Ou*Qm)
public static void sort(int[] data, int algorithm) { =+q9R`!L]
impl[algorithm-1].sort(data); vq*N
} \)VV6'zih
p_Fc:%j>
public static interface Sort { SN|EWe^
public void sort(int[] data); (yE?)s
} ~=HN30
w[z^B&
public static void swap(int[] data, int i, int j) { 5O&6 (Gaf
int temp = data; cbl@V 1
data = data[j]; ^_JD 7-g
data[j] = temp; ;Jt*s
} SF61rm
} .ag4i;hS8