[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; [<{+tAdn)
} $'VFb=?XrK
int i1=l; 1~q|%"J
int i2=mid+1; }"'l8t0?
for(int cur=l;cur<=r;cur++){ {*PB+WGe
if(i1==mid+1) 6d3-GMUQ
data[cur]=temp[i2++]; VSt)~
else if(i2>r) d1>Nn!m
data[cur]=temp[i1++]; jkIgEF2d*
else if(temp[i1] data[cur]=temp[i1++]; +lqX;*a=N
else ;/Dp
data[cur]=temp[i2++]; :>g*!hpb
} DPZG_{3D
} B[O1^jdO
#}!Ge
} c`&<"Us
ON=6w_
改进后的归并排序: Hi<5jl
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package org.rut.util.algorithm.support; &De&ZypU
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import org.rut.util.algorithm.SortUtil; 4HK#]M>yz
ceR zHq=
/** Ol'Ct'_k,"
* @author treeroot r6`v-TY(/
* @since 2006-2-2 poYO
* @version 1.0 <OEu 4,~:
*/ ?8Hr 9
public class ImprovedMergeSort implements SortUtil.Sort { !1}A\S
q~=]_PMP
private static final int THRESHOLD = 10; _ZfJfd~
rBZ0(XSZQ
/* FHS6Mk26
* (non-Javadoc) y ZsC>
* 5[Yzi> o[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eZm,K'/!
*/ +mN]VO*y
public void sort(int[] data) { -P<e-V%<
int[] temp=new int[data.length]; PSQ5/l?\>
mergeSort(data,temp,0,data.length-1); k/yoRv%
} /t083
d-=/@N!4e
private void mergeSort(int[] data, int[] temp, int l, int r) { ayJKt03\O\
int i, j, k; M38QA
int mid = (l + r) / 2; gI qYIt
if (l == r) afcI5w;>}
return; iy{*w&p
if ((mid - l) >= THRESHOLD) X99:/3MXB'
mergeSort(data, temp, l, mid); .ns1;8
else [ENm(e$sI
insertSort(data, l, mid - l + 1); &!#a^d+` 0
if ((r - mid) > THRESHOLD) z17x%jXy
mergeSort(data, temp, mid + 1, r); ^[SQw)*
else N4Z%8:"pj
insertSort(data, mid + 1, r - mid); spV/+jy{
.R` {.~_{!
for (i = l; i <= mid; i++) { 9air"4
temp = data; hSq3LoHV
} sV+/JDl
for (j = 1; j <= r - mid; j++) { !K#Q[Ee
temp[r - j + 1] = data[j + mid]; Q0I22?
} d([NU;
int a = temp[l]; 8=H!&+aGh
int b = temp[r]; Yqy7__vm
for (i = l, j = r, k = l; k <= r; k++) { 2Ke?*
if (a < b) { u|.L73<j%
data[k] = temp[i++]; wPYz&&W
a = temp; t%wC~1
} else { vJT %ET
data[k] = temp[j--]; t3.;W/0_
b = temp[j]; aCe<*;b@
} O<Rm9tZ8
} `Pv[A
} R g7 O
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/** SNB>
* @param data yT<yy>J9l#
* @param l E4aCL#}D
* @param i oX@0+*"
*/ #y"EhwF
private void insertSort(int[] data, int start, int len) { Re**)3#gn
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); b/='M`D}#G
} %l!Gt"\xm
} f:gXXigY,
} xioL6^(Qk,
} K)c`G_%G
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堆排序： GpV"KVJJ/
Y#EM]x5!=
package org.rut.util.algorithm.support; y,i:BQJ<
}u0t i"V
import org.rut.util.algorithm.SortUtil; Bkvh]k;F8
qh!2dj
/** \-Mzs 0R
* @author treeroot #wL}4VN
* @since 2006-2-2 gwtR<2,p
* @version 1.0 3zU!5tg
*/ BD+V{x}P
public class HeapSort implements SortUtil.Sort{ KPIc?|o/6
8|uFW7Q
/* (non-Javadoc) ^T83E}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?r"'JO.w
*/ K r9 P#Y
public void sort(int[] data) { Mj2o>N2,
MaxHeap h=new MaxHeap(); c0.i
h.init(data); fJ_d,4
for(int i=0;i h.remove(); I6d4<#Q@L
System.arraycopy(h.queue,1,data,0,data.length); 48JD >=@7
} #IjG[a-
KiU/N$E
private static class MaxHeap{ :!a'N3o>
8{aS$V"
void init(int[] data){ I^*&u,
this.queue=new int[data.length+1]; '`$z!rA
for(int i=0;i queue[++size]=data; c=iv\hn
fixUp(size); kGsd3t!'
} ,C%fA>?UF8
} hm"i\JZ3N
Z<6XB{Nh\
private int size=0; [m3[plwe
1'wwwxe7
private int[] queue; rcUXYJCh-
5(0f"zY
public int get() { (he cvJ
return queue[1]; 7/nnl0u8
} Fp52|w_
]RgLTqv4x
public void remove() { WV]%llj^
SortUtil.swap(queue,1,size--); ##~";j
fixDown(1); `wRQ-<Y
} ^a&-GhX;
file://fixdown #jAlmxN
private void fixDown(int k) { #flOaRl.
int j; MYgh^%w:
while ((j = k << 1) <= size) { 5 Z+2
if (j < size %26amp;%26amp; queue[j] j++; $Fx:w
if (queue[k]>queue[j]) file://不用交换 :r%Hsur(
break; <smi<syx
SortUtil.swap(queue,j,k); 41f4zisZ
k = j; `NqX{26GV+
} dHp(U :)
} o";5@NH
private void fixUp(int k) { d7 )&Z:
while (k > 1) { tW4|\-E"s4
int j = k >> 1; PMER~}^
if (queue[j]>queue[k]) Y0`@$d&n
break; nA:\G":\y
SortUtil.swap(queue,j,k); GRV#f06
k = j; 0?hJ!IT;q7
} nX,2jT;@L
} =WFn+#&^
7?Vo([8
} aChyl;#E
s ~'><ioh
} H'N$Vv2q
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SortUtil： XRi/O)98o
X2>qx^jT
package org.rut.util.algorithm; ?;1^8 c0
t?JY@hT*
import org.rut.util.algorithm.support.BubbleSort; [C)JI;\
import org.rut.util.algorithm.support.HeapSort; ,MkldCV
import org.rut.util.algorithm.support.ImprovedMergeSort; K:Mm?28s
import org.rut.util.algorithm.support.ImprovedQuickSort; P|mV((/m4
import org.rut.util.algorithm.support.InsertSort; m/W0vPM1
import org.rut.util.algorithm.support.MergeSort; |3\$\qa
import org.rut.util.algorithm.support.QuickSort; 7O6VnKl
import org.rut.util.algorithm.support.SelectionSort; Z|&Y1k-h
import org.rut.util.algorithm.support.ShellSort; t[Dg)adc
,VK! 3$;|
/** Ul@Jg
* @author treeroot TG ,T>'
* @since 2006-2-2 72oiO[>N'
* @version 1.0 OnGtIY
*/ Hd)z[6u8eT
public class SortUtil { c5~d^
public final static int INSERT = 1; NPjh2 AJm
public final static int BUBBLE = 2; #$trC)?~q
public final static int SELECTION = 3; o(iv=(o
public final static int SHELL = 4; XEd|<+P1
public final static int QUICK = 5; # 3{g6[Y
public final static int IMPROVED_QUICK = 6; >XzP'h
public final static int MERGE = 7; +^!;J/24
public final static int IMPROVED_MERGE = 8; rG7S^,5o
public final static int HEAP = 9; !Gwf"-TQ
O&=40"Dr
public static void sort(int[] data) { > "G HLi
sort(data, IMPROVED_QUICK); pyPS5vWG
} Of|e]GR
private static String[] name={ = ~{n-rMF
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Sb_T _m
}; nv WTx4oy
yP:/F|E$
private static Sort[] impl=new Sort[]{ 7/*a
new InsertSort(), ~_vzss3-C
new BubbleSort(), z:PH _N~
new SelectionSort(), PVBf'
new ShellSort(), y?BzZ16\bL
new QuickSort(), "X/cG9Lw
new ImprovedQuickSort(), ^fj):n5/
new MergeSort(), C^Jf&a
new ImprovedMergeSort(), rTJv>Jjld
new HeapSort() (GnwK1f
}; ).+!/x
JI1O(
public static String toString(int algorithm){ o* qF"xG
return name[algorithm-1]; SZ+<0Y|
} lNV%R(
MZ_+doN
public static void sort(int[] data, int algorithm) { j!c[$;
impl[algorithm-1].sort(data); {4\hxyw
} Z Mp
![H!Y W'
public static interface Sort { {,r7dxI)`
public void sort(int[] data); JM8s]&
} dt NHj/\
Iq&S6l <0
public static void swap(int[] data, int i, int j) { 6`LC(Nv%-n
int temp = data; C9oF*{
data = data[j]; |JVeW[C
data[j] = temp; %,9iY&;U"
} *|c*/7]<
} ;d17xu?ks