[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; hj,x~^cS
} K*FAngIB
int i1=l; N@0scfO6<
int i2=mid+1; \"Iy<zG
for(int cur=l;cur<=r;cur++){ Dx'e+Bm
if(i1==mid+1) dxWw%_Q
data[cur]=temp[i2++]; =LnAMl#9
else if(i2>r) NLY5L7
data[cur]=temp[i1++]; K_n%`5
else if(temp[i1] data[cur]=temp[i1++]; &_j4q
else 3k^jR1
data[cur]=temp[i2++]; m5{SPa,y
} !F)oX7"
} ;D:T ^4
}*.*{I
} _AYF'o-Cm
>.\E'e5^C
改进后的归并排序: E76:}(
BUyA]
package org.rut.util.algorithm.support; --kK<9J7
sKO ;p
import org.rut.util.algorithm.SortUtil; )zo ;r!eP
'%N)(S`O7P
/** KL4/"$l]
* @author treeroot Q@n kT1o
* @since 2006-2-2 "g-NUl`'
* @version 1.0 !&[4T#c
*/ X2v'9 x
public class ImprovedMergeSort implements SortUtil.Sort { z?,5v`,t2
<bI,y_<K
private static final int THRESHOLD = 10; z, [+
{AUEVt
/* )K~nZLULY
* (non-Javadoc) ]mA?TwD
* Uw"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Xk'.t|
*/ `l#g`~L
public void sort(int[] data) { 8t%1x|!
int[] temp=new int[data.length]; a0.XJR{T"
mergeSort(data,temp,0,data.length-1); "#jKk6{I0
} N=9lA0y+
Cq~Ir*"
private void mergeSort(int[] data, int[] temp, int l, int r) { _8 J(;7
int i, j, k; }q9f,mz
int mid = (l + r) / 2; <lR8MqjM_
if (l == r) rY}ofq7b
return; p~IvkW>ln)
if ((mid - l) >= THRESHOLD) )A%Y wI$
mergeSort(data, temp, l, mid); G>x0}c
else ~55>uw<
insertSort(data, l, mid - l + 1); s8Oz^5p(
if ((r - mid) > THRESHOLD) #SueT"F
mergeSort(data, temp, mid + 1, r); WM26-nR
else A_%w(7o"
insertSort(data, mid + 1, r - mid); k1J}9HNYR
/ yCV-L2J
for (i = l; i <= mid; i++) { 1zRO==b
temp = data; M_K&x-H0
} )f Rh^6
for (j = 1; j <= r - mid; j++) { 5S LF1u;
temp[r - j + 1] = data[j + mid]; zlE kP @)
} d@hJ=-4
int a = temp[l]; zYgLGwi{
int b = temp[r]; GcuZPIN%D
for (i = l, j = r, k = l; k <= r; k++) { D#0}/
if (a < b) { xXZN<<f59
data[k] = temp[i++]; X*KT=q^?n
a = temp; |4vk@0L
} else { P;Ox|
data[k] = temp[j--]; ;q Z2V
b = temp[j]; K#jm6Xh?E
} )1/O_N6C
} ^gG,}GTl
} 3$Je,|bs
Vs >1%$If
/** i^#RiCeo
* @param data J3=jC5=J4
* @param l R)/w
* @param i +dfSCs
*/ sC>8[Jatd
private void insertSort(int[] data, int start, int len) { 6%TV X
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); # V+e
} Gx m"HC
} K\G|q}E/1
} o%:eYl
} C}CX n X
Xma0k3;-
堆排序： c!zu0\[Id
~0L>l J
package org.rut.util.algorithm.support; TO<g@u]*
9 wc=B(a|
import org.rut.util.algorithm.SortUtil; [eImP V]
XZhhr1-<a
/** "'%x|nB
* @author treeroot NJ.kT uk
* @since 2006-2-2 79\ =)m}$Q
* @version 1.0 ;RXv%ML
*/ C4y<+G.`
public class HeapSort implements SortUtil.Sort{ 0/c4%+ Ln
/Mv'fich(
/* (non-Javadoc) |$Td-M^)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^-DK<jZ^
*/ xed$z
public void sort(int[] data) { Y#\e~>K
MaxHeap h=new MaxHeap(); 2l9_$evK~
h.init(data); k,2%%m
for(int i=0;i h.remove(); =&vV$UtV
System.arraycopy(h.queue,1,data,0,data.length); grZN.zTO
} GFvOrRlP\
D`u{U]
private static class MaxHeap{ M:ttzsd
Q?~l=}2
void init(int[] data){ hSxf;>(d
this.queue=new int[data.length+1]; !$j'F?2>
for(int i=0;i queue[++size]=data; ~`y6YIJ3
fixUp(size); s;>jy/o0 s
} t JJaIb6Xj
} dme_Ivt
/gxwp:&lY
private int size=0; [xHK^JP 8F
!O*\|7A(
private int[] queue; STO6cNi
w!61k \
public int get() { X4jtti
return queue[1]; `Do-!G+W
} )AnX[:y
Hg<]5
public void remove() { j#29L"
SortUtil.swap(queue,1,size--); C/)Xd^#
fixDown(1); nP] ~8ViS
} `Dj-(~x
file://fixdown 1D6iJ
private void fixDown(int k) { y:xZ(RgfF
int j; -e30!A
while ((j = k << 1) <= size) { pbJs3uIR
if (j < size %26amp;%26amp; queue[j] j++; 90;[5c
if (queue[k]>queue[j]) file://不用交换 O0e6I&u:
break; ri6_u;Ch
SortUtil.swap(queue,j,k); 60Y&)UR
k = j; m+zzhv1
} gE|_hfm(
} -r[l{ce
private void fixUp(int k) { Ig~lD>dnr'
while (k > 1) { |*Hw6m
int j = k >> 1; i&RPYbT{
if (queue[j]>queue[k]) +Ibcc8Qud
break; YHl6M&*@
SortUtil.swap(queue,j,k); -|T.APxB
k = j; bP(xMw<'j
} 8ex{N3
} Tmqtj
iCnKQG
} 4Z,MqG>
fQM:NI?9?
} tRFj<yuaq
CM_FF:<tn
SortUtil： h,45-#+
;~3CuN8
package org.rut.util.algorithm; :>]=YE
IZ/+ROn
import org.rut.util.algorithm.support.BubbleSort; %N04k8z
import org.rut.util.algorithm.support.HeapSort; QOB>TvE
import org.rut.util.algorithm.support.ImprovedMergeSort; h@&&.S`B
import org.rut.util.algorithm.support.ImprovedQuickSort; h${+{1](6
import org.rut.util.algorithm.support.InsertSort; q{ i9VJ]
import org.rut.util.algorithm.support.MergeSort; 1TJ2HO=Y
import org.rut.util.algorithm.support.QuickSort; N[:;f^bH49
import org.rut.util.algorithm.support.SelectionSort; [2:Q.Zj
import org.rut.util.algorithm.support.ShellSort; B|zJrz0q3
r>+\9q1
/** r3*0`Rup
* @author treeroot |wZcVct~
* @since 2006-2-2 @lRTp
* @version 1.0 9ePG-=5I
*/ %We~k'2f
public class SortUtil { LB1LQ0M
public final static int INSERT = 1; hOG9
public final static int BUBBLE = 2; [@(M%
public final static int SELECTION = 3; Bvb.N$G
public final static int SHELL = 4; gMS-mkZ
public final static int QUICK = 5; 3 -Nwg9U
public final static int IMPROVED_QUICK = 6; Gm~jC <
public final static int MERGE = 7; ErnjIx:
public final static int IMPROVED_MERGE = 8; ;EDc1:
public final static int HEAP = 9; ~.;+uH<i
xM"k qRZ
public static void sort(int[] data) { pUi|&F K">
sort(data, IMPROVED_QUICK); 2dg+R)%
} 'B>fRN
private static String[] name={ 78T9"CS
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" lV<2+Is
}; LQ(z~M0B
9%T~^V%T7
private static Sort[] impl=new Sort[]{ }coSMTMv6
new InsertSort(), ra2sYH1wr
new BubbleSort(), l+`f\},
new SelectionSort(), TrD2:N}dI
new ShellSort(), Er509zZ,[
new QuickSort(), D+.< kY.
new ImprovedQuickSort(), /P { Zo
new MergeSort(), 2O;Lw@W
new ImprovedMergeSort(), 8`~M$5!
new HeapSort() Jas=D
}; FOz~iS\
;aXu
public static String toString(int algorithm){ $=3&qg"!
return name[algorithm-1]; 7/C,<$Ep
} 0N9`WK
nE;^xMOK!
public static void sort(int[] data, int algorithm) { t+y$i@R:
impl[algorithm-1].sort(data); HGIPz{/5U
} {S[+hUl
-hL0}Wy$N
public static interface Sort { OI/m_xx@j
public void sort(int[] data); j=c=Pe"?u
} 7m='-_w)?w
Zcst$Aro
public static void swap(int[] data, int i, int j) { f"i(+:la
int temp = data; mXAGa8##j
data = data[j]; i;Y3pF0%P
data[j] = temp; {P/ sxh:e
} Zfwhg4G~
} vfBIQfH