[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; ~GZ!;An
} BQq,,i8H
int i1=l; bU9B2'%E
int i2=mid+1; ;gfY_MXnF
for(int cur=l;cur<=r;cur++){ JDrh-6Zgj
if(i1==mid+1) RLBjl%Q>
data[cur]=temp[i2++]; PYX]ld.E
else if(i2>r) WX$mAQDV
data[cur]=temp[i1++]; a"uO0LOb
else if(temp[i1] data[cur]=temp[i1++]; gmkD'CX*A
else )y&}c7xW
data[cur]=temp[i2++]; &"]Uh
} {Bk9]:'$5
} H-$)@
y1z<{'2x
} Cg[]y1Ne
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改进后的归并排序: ""Nu["|E
U+gOojRy{
package org.rut.util.algorithm.support; }GX[N\$N
22lC^)`TE
import org.rut.util.algorithm.SortUtil; SZW+<X
M il ![A1
/** +Gv{Apd"
* @author treeroot ,b!!h]t
* @since 2006-2-2 =@$G3DM
* @version 1.0 EooQLZ
*/ p""#Gbwj
public class ImprovedMergeSort implements SortUtil.Sort { ~Vq<nkWS
e]R`B}vO
private static final int THRESHOLD = 10; \-3\lZ3qj
V9qZa
/* )2t!= ua
* (non-Javadoc) GjlA\R^e
* P[{qp8(g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ns`|G;1vv
*/ oo sbf#V
public void sort(int[] data) { _):V7Zv
int[] temp=new int[data.length]; Pl(+&k`}
mergeSort(data,temp,0,data.length-1); Zo`Ku+RL2'
} Du@?j7&l=$
<%WN<T{q|
private void mergeSort(int[] data, int[] temp, int l, int r) { ,Y 1&[
int i, j, k; `QC
int mid = (l + r) / 2; 5y]1v
if (l == r) vowU+Y
return; y+D 3(Bsn
if ((mid - l) >= THRESHOLD) 8`Wj 1 ,q
mergeSort(data, temp, l, mid); V?"X0>]0
else v"'Co6fw
insertSort(data, l, mid - l + 1); m>dZ n
if ((r - mid) > THRESHOLD) Sj?u^L8es}
mergeSort(data, temp, mid + 1, r); >'IFr9&3
else hm#S4/=#
insertSort(data, mid + 1, r - mid); #Hm*<s.
xszGao'
for (i = l; i <= mid; i++) { *xm(K+j
temp = data; *=UxX ]0y
} Pp-\#WJ
for (j = 1; j <= r - mid; j++) { ie4keVlXc
temp[r - j + 1] = data[j + mid]; Cw`8[)=}o
} )X*?M?~\
int a = temp[l]; p0Cp\.
int b = temp[r]; `CCuwe<v
for (i = l, j = r, k = l; k <= r; k++) { ZI"L\q=|0#
if (a < b) { _-/aMfyQ
data[k] = temp[i++]; yU*upQ
a = temp; C'8v\C9Ag
} else { Da_8Q(XFe
data[k] = temp[j--]; m# #( uSh
b = temp[j]; 0ox 8_l
} ;{1J{-EA
} jtqH3xfy
} jIY
V=yRE
/** gp07I{0~m
* @param data v@zpF)|
* @param l "E`;8SZa
* @param i %ux%=@%
*/ QoZ7l]^
private void insertSort(int[] data, int start, int len) { a^yBtb~,P
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); lZT9 SDtS
} h{zE;!+)D
} /Mk85C79
} l#7].-/
} GdZ_
z@!zQ Vp
堆排序： m)G=4kK52-
RQ?T~ASs
package org.rut.util.algorithm.support; \QF\Bh
En&bwLu:s
import org.rut.util.algorithm.SortUtil; f:$LVpXS-
T3po.Km\{
/** :1%z;
* @author treeroot YTBZklM
* @since 2006-2-2 'qD5
* @version 1.0 ogN/zIU+VA
*/ zqEMR>px
public class HeapSort implements SortUtil.Sort{ ]RYk Y7>`
cG|)z<Z
/* (non-Javadoc) HN'r ZAZ(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =)Z!qjf1U
*/ emZ^d/A
public void sort(int[] data) { En@] xvE
MaxHeap h=new MaxHeap(); `x;8,7W;B
h.init(data); ) V}q7\G~
for(int i=0;i h.remove(); Izrf42 >k
System.arraycopy(h.queue,1,data,0,data.length); D>& ;K{!
} [~&C6pR
}7k!>+eQ
private static class MaxHeap{ F8*e
99XbpP55
void init(int[] data){ xw60l&s.\L
this.queue=new int[data.length+1]; o`^GUY}
for(int i=0;i queue[++size]=data; SB5[PDL_q
fixUp(size); tPO\e]
} 1FfdW>ay*
} _!FM^N}|
+3VDapfin
private int size=0; p%304oP6
DJl06-s V
private int[] queue; W":is"
ZdQm&?
public int get() { jF}zv
return queue[1]; KMz\h2X
} f.Y9gkt3d
Peha{]U
public void remove() { hjiU{@q
SortUtil.swap(queue,1,size--); i<D}"h|
fixDown(1); 5,:tjn
} 1jZ:@M:
file://fixdown # k+Ggw
private void fixDown(int k) { Wpom{-
int j; 9%\<x
while ((j = k << 1) <= size) { H~-zq}4
if (j < size %26amp;%26amp; queue[j] j++; 2G"mm(
if (queue[k]>queue[j]) file://不用交换 IY|;}mIF
break; `n8) o%E9
SortUtil.swap(queue,j,k); &fYx0JT
k = j; 7BCCQsz<
} qF6YH
} Du>dTi~
private void fixUp(int k) { P,RCbPC4
while (k > 1) { zypZ3g{vz
int j = k >> 1; sm}q&m]ad
if (queue[j]>queue[k]) W|=?-
break; (]0$^!YK
SortUtil.swap(queue,j,k); bG+p
k = j; Uq)|]a&e
} DLE|ctzj[7
} );$Uf!v4
Oa~t&s
} c=H(*#
`"[VkQFB/
} D8_m_M|P
P*/px4;6
SortUtil： _jef{j
1rC8]M.N
package org.rut.util.algorithm; Rs)tf|`/
g'Ft5fQ"o/
import org.rut.util.algorithm.support.BubbleSort; DVD}
import org.rut.util.algorithm.support.HeapSort; C 0*k@kGy
import org.rut.util.algorithm.support.ImprovedMergeSort; 'q1)W'
import org.rut.util.algorithm.support.ImprovedQuickSort; p<'mc|hGq
import org.rut.util.algorithm.support.InsertSort; ~=%eOoZP;c
import org.rut.util.algorithm.support.MergeSort; po"M$4`9
import org.rut.util.algorithm.support.QuickSort; <(d^2-0
import org.rut.util.algorithm.support.SelectionSort; .D^k0V
import org.rut.util.algorithm.support.ShellSort; iUA2/ A
ZcX%:ebKS
/** -'{ioHt&X/
* @author treeroot 4cJ^L <
* @since 2006-2-2 X =S;8=N
* @version 1.0 |IH-a"
*/ 0$&Z_oJ
public class SortUtil { 'm}~
public final static int INSERT = 1; i1vBg}WHN
public final static int BUBBLE = 2; D8h?s
public final static int SELECTION = 3; GfQMdLy\Z
public final static int SHELL = 4; wias]u|
public final static int QUICK = 5; t>&$_CSWK
public final static int IMPROVED_QUICK = 6; (5-"5<-@R
public final static int MERGE = 7; ]S,I}NP
public final static int IMPROVED_MERGE = 8; h'UWf"d
public final static int HEAP = 9; L7n->8Qk
#zrD i
public static void sort(int[] data) { LLgN%!&
sort(data, IMPROVED_QUICK); 6$SsdT|8B
} (' `) m
private static String[] name={ G7%Nwe~Y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $g#X9/+<
}; "5XD+qi
}E8 Y,;fTD
private static Sort[] impl=new Sort[]{ 1ErH \!
new InsertSort(), s26s:A3rh
new BubbleSort(), Ow//#:
new SelectionSort(), ~DqNA%Mb
new ShellSort(), 3zWY%(8t4?
new QuickSort(), ixiRFBUcF~
new ImprovedQuickSort(), *PL+)2ob
new MergeSort(), <%pi*:E|
new ImprovedMergeSort(), S)g5Tu)
new HeapSort() Y0|~]J(B
}; Yz-b~D/=}
@!%<JZEz3
public static String toString(int algorithm){ UfcM2OmbK
return name[algorithm-1]; y*Ex5N~JC
} Y;&Cmi
&e,xN;
public static void sort(int[] data, int algorithm) { B TcxBh
impl[algorithm-1].sort(data); ~&B_ Bswf
} j nI)n*
.^JID~<?#
public static interface Sort { >)#*}JI
public void sort(int[] data); pk;bx2CP8
} H7qda'%>
VJ_E]}H
public static void swap(int[] data, int i, int j) { Qt>yRt
int temp = data; f+<-Jc
data = data[j]; b;soMilz
data[j] = temp; %HYC-TF#
} ) 3YE$,
} db#y]>^l