[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; X0=-{<W
} XArLL5_L
int i1=l; G ~\$Oq8
int i2=mid+1; bFXCaD!{G
for(int cur=l;cur<=r;cur++){ V$D d 7
if(i1==mid+1) PelV67?M
data[cur]=temp[i2++]; #(4hX6?5AI
else if(i2>r) MT gEq
data[cur]=temp[i1++]; }`]^LFU5
else if(temp[i1] data[cur]=temp[i1++]; <7Lz<{jaJ
else @V u[Tg}J
data[cur]=temp[i2++]; JPzPL\
} .8~ x;P6
} jzp%.4/j
hlEvL
} 5Ozj&Zq
'z5 ;o:T
改进后的归并排序: 2*FZ@?X@r
3=I Q
package org.rut.util.algorithm.support; O$^YUHD
Ob+c*@KiW
import org.rut.util.algorithm.SortUtil; YI+|6s[
.{>-.&
/** <#`L&w.
* @author treeroot @gk[sQ\O
* @since 2006-2-2 x7>sy,c
* @version 1.0 %LmB`DqZ
*/ AkC\CdmA
public class ImprovedMergeSort implements SortUtil.Sort { pDfF'jt9
4TV9t"Dk+c
private static final int THRESHOLD = 10; =T6\kz9)`
"0mR*{nF
/* .YbD.{]D
* (non-Javadoc) Jt][b
* H^0KNMf(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J],BO\ECH
*/ c6.|; 4
public void sort(int[] data) { <C(2(3
int[] temp=new int[data.length]; ,)8Hl[y
mergeSort(data,temp,0,data.length-1); >MLqOUr#
} ~Q\[b%>J
wEyh;ID3#
private void mergeSort(int[] data, int[] temp, int l, int r) { [c~zO+x
int i, j, k; Ado>)c"*y1
int mid = (l + r) / 2; !).dc.P
if (l == r) 5j%jhby?
return; E2cmT$6
if ((mid - l) >= THRESHOLD) LdV_7)
mergeSort(data, temp, l, mid); <jjaqDSmz
else 1+zax*gO-
insertSort(data, l, mid - l + 1); wvY$s;
if ((r - mid) > THRESHOLD) T8k oP
mergeSort(data, temp, mid + 1, r); &[xJfL
else VPzdT*g]
insertSort(data, mid + 1, r - mid); ZgtOy|?|
wu3ZSLY
for (i = l; i <= mid; i++) { >d|W>|8e
temp = data; K+H82$ #
} `. Z".
for (j = 1; j <= r - mid; j++) { U6"50G~u
temp[r - j + 1] = data[j + mid]; _1QNO#X
} >FO=ioNY
int a = temp[l]; ygG9ht
int b = temp[r]; ektFk"W3A\
for (i = l, j = r, k = l; k <= r; k++) { r\?*?sL
if (a < b) { EhoR.
data[k] = temp[i++]; +`xp+Q
a = temp; DzMkeX
} else { Zf! 7pM
data[k] = temp[j--]; H>?@nYP
b = temp[j]; 5sRNqTIr
} ?/D#ql7
} /V~(!S>
} Fej$`2mRH
z Ey&%Ok
/** 9i@*\Ada
* @param data w*x}4wW
* @param l F);C?SW"
* @param i b $!l*r
*/ a+d|9y/k
private void insertSort(int[] data, int start, int len) { )yJjJ:re
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); l"64w>,
} #i?TCO
} p O.8>C%
} ;6Z?O_zp4
} SJfsFi?n
-M:.D3,L
堆排序： -Q/Dbz#-
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package org.rut.util.algorithm.support; gNJ\*]SY
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import org.rut.util.algorithm.SortUtil; FM5$83Q
Ek:u[Uw\
/** /V^S)5r
* @author treeroot *)Y;`Yg$
* @since 2006-2-2 }[|"db
* @version 1.0 BdSTB"
*/ p<YO3@B+
public class HeapSort implements SortUtil.Sort{ tSjK=1"}
F+X3CB,f
/* (non-Javadoc) QJ QQ-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a^N/N5-Z
*/ [Z1EjeX
public void sort(int[] data) { D6D*RTi4
MaxHeap h=new MaxHeap(); 9Rpj&0Is
h.init(data); m@~HHwj
for(int i=0;i h.remove(); /*[a>B4-q
System.arraycopy(h.queue,1,data,0,data.length); V6c?aZ,O
} #RcmO**
q?6Zu:':
private static class MaxHeap{ /dO&r'!:
drH!?0Dpg
void init(int[] data){ }I]9I _S
this.queue=new int[data.length+1]; ][.1b@)qV
for(int i=0;i queue[++size]=data; 3Xy>kG}
fixUp(size); @{j-B IRZ0
} ?r/7:
} lD(d9GVm{z
X6PfOep
private int size=0; j \SDw
W[b/.u5z:
private int[] queue; 2- )Ml*
l{k
public int get() { 'lWNU
return queue[1]; nV'B!q
} i^=an?}/
f,$FrI,
public void remove() { H_x35|"
SortUtil.swap(queue,1,size--); 0-QkRr_I
fixDown(1); Z|)~2[Roa
} b{sFN!
file://fixdown wM><DrQ
private void fixDown(int k) { =w8*n2
int j; >k:)'*
while ((j = k << 1) <= size) { wH<S0vl
if (j < size %26amp;%26amp; queue[j] j++; n_5g:`Y
if (queue[k]>queue[j]) file://不用交换 tZ(Wh
break; /(Y\ <
SortUtil.swap(queue,j,k); Bk8U\Ut
k = j; *H;&hq
} M 3^p,[9r#
} lcih [M6z
private void fixUp(int k) { X(bb1
while (k > 1) { H`fkds
int j = k >> 1; X,~8) W
if (queue[j]>queue[k]) luV%_[F
break; `toSU>:
SortUtil.swap(queue,j,k); kG%<5QH
k = j; 4*'NpqC(_
} H~ (I
} "<=^Sm
A:N!H_x
} fY>\VY$>
!\p-|51
} Um%E/0j
A1i-QG/6
SortUtil： DRw%~
l.C{Ar
package org.rut.util.algorithm; O'(qeN<^w
f3nib8B'
import org.rut.util.algorithm.support.BubbleSort; -5.>9+W8I
import org.rut.util.algorithm.support.HeapSort; w+}KX><r
import org.rut.util.algorithm.support.ImprovedMergeSort; :5;[Rg5 2
import org.rut.util.algorithm.support.ImprovedQuickSort; g-6!+>w*>e
import org.rut.util.algorithm.support.InsertSort; 2PRGwK/
import org.rut.util.algorithm.support.MergeSort; ctj.rC)6n
import org.rut.util.algorithm.support.QuickSort; j+s8V-7(
import org.rut.util.algorithm.support.SelectionSort; u6I# D _
import org.rut.util.algorithm.support.ShellSort; YV0e)bf
_oR6^#5#
/** _w)0r}{
* @author treeroot U;ev3
* @since 2006-2-2 #LF_*a0v
* @version 1.0 1`b?nX
*/ 75<E0O
public class SortUtil { G.L4l|%W
public final static int INSERT = 1; {Ke3
public final static int BUBBLE = 2; i^j{l_-JE
public final static int SELECTION = 3; W&GDE
public final static int SHELL = 4; x'}{^'}/
public final static int QUICK = 5; m`n51i{U
public final static int IMPROVED_QUICK = 6; !5x"d7
public final static int MERGE = 7; F YcC2TM
public final static int IMPROVED_MERGE = 8; |Y:T3hra61
public final static int HEAP = 9; InRn!~_N
yl|+D]
public static void sort(int[] data) { 2f F)I&
sort(data, IMPROVED_QUICK); )-[X^l j
} Y ||!V
private static String[] name={ xOP\ +(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 2_UH,n
}; ?jy^WF`
gm4-w 9M[p
private static Sort[] impl=new Sort[]{ :s*&_y
new InsertSort(), 'v4AM@%u
new BubbleSort(), ~d28"p.7
new SelectionSort(), }k'8*v}8
new ShellSort(), HD Eqq
new QuickSort(), )07M8o!^l
new ImprovedQuickSort(), C!v0*^i
new MergeSort(), tBdvk>d
new ImprovedMergeSort(), k5W5 9tz
new HeapSort() uPb9j;Q?
}; s|dL.@0,L
AQ@A$
public static String toString(int algorithm){ )p(XY34]
return name[algorithm-1]; ))u$j4V
} /ZX8gR5x
+STT(bMn
public static void sort(int[] data, int algorithm) { R0{+Xd
impl[algorithm-1].sort(data); v^JyVf>
} %J3#4gG^v
B7va#'ne4{
public static interface Sort { _k _F
public void sort(int[] data); kf^Wzp
} E/Y.f
wHdq:,0-!
public static void swap(int[] data, int i, int j) { 0W#.$X5
int temp = data; W&6ye
data = data[j]; @zSoPDYv,
data[j] = temp; H`m|R
} dc"Vc 3)
} HA"LU;5>2J