[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; wi(Y=?=
} ]vrZGX a+
int i1=l; ER0 Yl
int i2=mid+1; du65=w4E!
for(int cur=l;cur<=r;cur++){ ClG%zE&i
if(i1==mid+1) 2qMiX|Y
data[cur]=temp[i2++]; wQ_4_W
else if(i2>r) ~#_~DqbMZ5
data[cur]=temp[i1++]; :@A&HkF
else if(temp[i1] data[cur]=temp[i1++]; Y },E3<
else /K=OsMl2b8
data[cur]=temp[i2++]; u4x-GObJM
} L2}\Ah"[
} /6x&%G:m#
*"%TAe7?~+
} ]\,?u /
["-rDyP
改进后的归并排序: OO:S2-]Y>e
!_QI<=X
package org.rut.util.algorithm.support; f|[7LIdh-
Sj+H{xJi
import org.rut.util.algorithm.SortUtil; g4K+AK
'aSsyD!?<
/** [xS7ae
* @author treeroot cslC+e/
* @since 2006-2-2 TdhfX{nk
* @version 1.0 TxrW69FV7
*/ I _nQTWcm
public class ImprovedMergeSort implements SortUtil.Sort { "1O_h6C
n,N->t$i
private static final int THRESHOLD = 10; #bOv}1,s
M/3;-g
/* m+QS -woHn
* (non-Javadoc) #s)f3HU>
* o9kJ90{D=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,K5K?C$k
*/ H.5 6
public void sort(int[] data) { m=l>8
int[] temp=new int[data.length]; uGU2
mergeSort(data,temp,0,data.length-1); 0.MB;gm:
} ^<;W+dWdU
_@5Xmr
private void mergeSort(int[] data, int[] temp, int l, int r) { _3/u#'m0
int i, j, k; L&\W+k
int mid = (l + r) / 2; ym;]3<I?I[
if (l == r) l*CulVX
return; g2OnLEF]s
if ((mid - l) >= THRESHOLD) pPReo)
mergeSort(data, temp, l, mid); ~q>jXi
else :;$MUOps
insertSort(data, l, mid - l + 1); E-A9lJWr
if ((r - mid) > THRESHOLD) NdK`-RT
mergeSort(data, temp, mid + 1, r); >6es 5}
else @iz Onc:
insertSort(data, mid + 1, r - mid); /b+~BvTh
"4b{YWv
for (i = l; i <= mid; i++) { o&JoeKXor
temp = data; ,!= sGUQ)
} 5Tsz|k
for (j = 1; j <= r - mid; j++) { "x$@^
temp[r - j + 1] = data[j + mid]; FZ*"^=)`G
} " ityx?
int a = temp[l]; SKG U)Rn;
int b = temp[r]; Np\NStx2
for (i = l, j = r, k = l; k <= r; k++) { snbXAx1L
if (a < b) { SSe;&Jk2d
data[k] = temp[i++]; +y| B"}x
a = temp; +17!v_4^
} else { .Xlo-gHk
data[k] = temp[j--]; |nMjv]#
b = temp[j]; 01(U)F\
} G|cjI*
} uQ=u@qtp
} Ar-Vu{`
FPc`J
/** <IrhR,@M,L
* @param data Q%CrB>|@
* @param l ^B"LT>.[
* @param i }T_"Vg q
*/ W ?x~"-*
private void insertSort(int[] data, int start, int len) { fh#:j[R4e
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); yQJ0",w3o.
} V_i&@<J
} `E~"T0RX
} GcM1*)$ 4
} :tWkK$
PYQ0&;z
堆排序： lDS y$
"rdpA[>L
package org.rut.util.algorithm.support; FM]clC;X?
+|C@B`h
import org.rut.util.algorithm.SortUtil; :6n4i$
VgPlIIHh5
/** %[XP}L$
* @author treeroot &XNt/bK-?
* @since 2006-2-2 FQek+[ox
* @version 1.0 uc9h}QJ*
*/ 9>{fsy
public class HeapSort implements SortUtil.Sort{ +G;<D@gSa0
h-p}Qil,
/* (non-Javadoc) J;sQvPHV8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7[e-3
*/ NSVE3
public void sort(int[] data) { " ILF!z
MaxHeap h=new MaxHeap(); Y`gO:d8
h.init(data); Q8m~L1//S
for(int i=0;i h.remove(); Mg >%EH/'
System.arraycopy(h.queue,1,data,0,data.length); P`rfDQoZ
} *,u{,$}2
hy/g*>
private static class MaxHeap{ 6+=_p$crMx
]ty$/{hx'
void init(int[] data){ vhZXgp0X
this.queue=new int[data.length+1]; p,=IL_
for(int i=0;i queue[++size]=data; kB+$Kt<]L
fixUp(size); o0WwlmB5
} :@(1~Hm
} 6TRLHL~B
2UQF:R?LQ
private int size=0; Zx8$M5
OX,em Ti
private int[] queue; D)MFii1J~
(jKqwVs.:
public int get() { F=5+JjrX
return queue[1]; )]n>.ZmLCB
} g Cp`J(2v:
kNP-+o
public void remove() { Vc0j)3
SortUtil.swap(queue,1,size--); Z71_D
fixDown(1); {~&]
} IlF_g`
file://fixdown X$<pt,}%
private void fixDown(int k) { U_jW5mgsG
int j; f (C:J[;Z
while ((j = k << 1) <= size) { @l3&vt2=J
if (j < size %26amp;%26amp; queue[j] j++; :TVo2Zm[@
if (queue[k]>queue[j]) file://不用交换 FOD'&Yb&
break; e"1mdw"
SortUtil.swap(queue,j,k); ^/%o I;O{
k = j; '*[7O2\%/
} &$ }6:
} MoxWnJy}
private void fixUp(int k) { dkC_Sh{
while (k > 1) { \[!{tbK`2
int j = k >> 1; >07i"a
if (queue[j]>queue[k]) !UT!PX)
break; 2V8"jc
SortUtil.swap(queue,j,k); e O~p"d-|
k = j; Dj= {%
} :xg J2
} ;\"5)S
5%wA"_
} 9t`yv@.>N
ty[%:eG#
} Ud"_[JtGM
<|'ETqP<+
SortUtil： mR2"dq;U
#Br`;hL<T
package org.rut.util.algorithm; ZYB5s~;eB"
[cFD\"gJAr
import org.rut.util.algorithm.support.BubbleSort; f2tCB1[D+
import org.rut.util.algorithm.support.HeapSort; +%<kcc3
import org.rut.util.algorithm.support.ImprovedMergeSort; ZK?V{X{";
import org.rut.util.algorithm.support.ImprovedQuickSort; |5(CzXR]
import org.rut.util.algorithm.support.InsertSort; Lww&[|k.
import org.rut.util.algorithm.support.MergeSort; ,aWI&ve6
import org.rut.util.algorithm.support.QuickSort; %-YWn`yEm
import org.rut.util.algorithm.support.SelectionSort; DI/d(oFv`
import org.rut.util.algorithm.support.ShellSort; J<NpA(@^
ZT"vVX-)G
/** {%6 '|<`[
* @author treeroot uih8ZmRt
* @since 2006-2-2 lhQMR(w^
* @version 1.0 Nnn~7
*/ ,nog6\
public class SortUtil { bs}SFTL
public final static int INSERT = 1; Rhlm
public final static int BUBBLE = 2; d~.hp
public final static int SELECTION = 3; #_Uo^Mw
public final static int SHELL = 4; F)=<|,b1
public final static int QUICK = 5; %X}D(_
public final static int IMPROVED_QUICK = 6; 7aRy])x
public final static int MERGE = 7; ;Ym6ey0t
public final static int IMPROVED_MERGE = 8; Za,o
public final static int HEAP = 9; H [M:iV
E690'\)31
public static void sort(int[] data) { 3p-SpUvp
sort(data, IMPROVED_QUICK); .: wg@Z
} rD6NUS
private static String[] name={ ]=3hH+1 a
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" C(sz/x?11
}; &]f8Xd
n\7>_
private static Sort[] impl=new Sort[]{ Z3<lJk\Y
new InsertSort(), W-D4" G@
new BubbleSort(), Hl}m*9<9us
new SelectionSort(), g\+!+!"~
new ShellSort(), 7h.[eMLPB
new QuickSort(), <}mA>c'k
new ImprovedQuickSort(), U_9|ED:
new MergeSort(), <%4pvn8d?&
new ImprovedMergeSort(), sj+ )
new HeapSort() H>\lE2
}; }If,O
$/u.F;
public static String toString(int algorithm){ )+)qFGVz
return name[algorithm-1]; ~urk Uz
} ;Srzka2
1@-l@ P
public static void sort(int[] data, int algorithm) { ?iaO+G&|
impl[algorithm-1].sort(data); rIyIZWkI
} t[({KbIy
/ H GPy
public static interface Sort { Qm[ )[M
public void sort(int[] data); 5OTZa>H
} %h_N%B$7c1
D1]?f`
public static void swap(int[] data, int i, int j) { 8XfOMf~d`
int temp = data; svCm}`
data = data[j]; EAs^i+/
data[j] = temp; RR`\q>|
} 1mv5B t
} fTy{`}>