[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; RwKnNIp
} Cq8.^=}_
int i1=l; 8! eYax
int i2=mid+1; ~H`m"4zQ
for(int cur=l;cur<=r;cur++){ i&mcM_g32
if(i1==mid+1) =d`w~iC
data[cur]=temp[i2++]; MTXh-9DA
else if(i2>r) ,/2&HZd
data[cur]=temp[i1++]; 9`y@2/!Y
else if(temp[i1] data[cur]=temp[i1++]; Qe4O N3X!
else Rax]svc
data[cur]=temp[i2++]; 3qf?n5"8
} 41uiW,
} #mKF)W
sbv2*fno5
} OFe-e(c1
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改进后的归并排序: W_.WMbT
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package org.rut.util.algorithm.support; DwmK?5p
sg`
import org.rut.util.algorithm.SortUtil; hZ_@U?^
VOJA}$
/** cYmgJBG
* @author treeroot #{_iNra9
* @since 2006-2-2 (vP<}
* @version 1.0 iq^F?$gFk
*/ }TQa<;Q
public class ImprovedMergeSort implements SortUtil.Sort { |P0!dt7sQ
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private static final int THRESHOLD = 10; )DB\du
BTc }Kfae
/* Oh# z zo
* (non-Javadoc) |xawguJ
* )_n=it$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dJv2tVm&'
*/ ?}RPnf
public void sort(int[] data) { I'`90{I
int[] temp=new int[data.length]; t =V| '
mergeSort(data,temp,0,data.length-1); Ty<."dyPW
} unKPqc%q=n
)Cu2xRr^`
private void mergeSort(int[] data, int[] temp, int l, int r) { ff&jR71E
int i, j, k; -wa"&Q
int mid = (l + r) / 2; @yM$Et5
if (l == r) @U+#@6
return; /|0xOiib
if ((mid - l) >= THRESHOLD) p0rmcP1Ln
mergeSort(data, temp, l, mid); LXoZ.3S
else mq}V @H5
insertSort(data, l, mid - l + 1); E)%DLZ
if ((r - mid) > THRESHOLD) : &bJMzB
mergeSort(data, temp, mid + 1, r); A^ofs*"Y
else "%}24t%
insertSort(data, mid + 1, r - mid); GXaPfC0-y
@r&*Qsf|
for (i = l; i <= mid; i++) { 8 XQo
temp = data; N TcojA{V$
} \5|MW)x
for (j = 1; j <= r - mid; j++) { 5Q;Q
temp[r - j + 1] = data[j + mid]; =(+]ee!Ti
} / 3eGt7x#
int a = temp[l]; !\VzX
int b = temp[r]; x(n|zp ("
for (i = l, j = r, k = l; k <= r; k++) { v%rmfIU
if (a < b) { |'Z+`HI
data[k] = temp[i++]; d.|*sZ&3p
a = temp; e%s1D
} else { AL!ppi
data[k] = temp[j--]; sZI"2[bk
b = temp[j]; 'ZJb`
} EXMW,
} !9.k%B:
} QJ&]4*>a
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/** -Ew>3Q
* @param data :wq][0)
* @param l oam$9 q
* @param i s"@}^ )*}
*/ yg.o?eML
private void insertSort(int[] data, int start, int len) { ~&?57Sw*m
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); X J`*dgJ
} Xdi<V_!BC-
} qV9}N-sS
} NH;e|8
} \ZM5J
/qKA1-R}4
堆排序： cLEd-{x
-4[eZ>$A|
package org.rut.util.algorithm.support; 4E2#krE%
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import org.rut.util.algorithm.SortUtil; ?q7MbQw
DKJ_g.]X
/** n}b{u@$
* @author treeroot XV/7K"
* @since 2006-2-2 _aYhW{wW
* @version 1.0 #W6 6`{>
*/ p>,D F9W`
public class HeapSort implements SortUtil.Sort{ |sI@m@
0BNH~,0u
/* (non-Javadoc) wmww7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Tw djBMte
*/ h/oun2C
public void sort(int[] data) { Fv7]1EO.
MaxHeap h=new MaxHeap(); ^vxx]Hji
h.init(data); ,,H;2xYf
for(int i=0;i h.remove(); ]0&X[?
System.arraycopy(h.queue,1,data,0,data.length); O1UArD
} R%4Yg(-Q
i}:hmy'
private static class MaxHeap{ Q7<Y5+
oi]XSh[_s
void init(int[] data){ mKjTJzS
this.queue=new int[data.length+1]; O&MH5^I
for(int i=0;i queue[++size]=data; ;O1jf4y
fixUp(size); LofpBO6^
} b}fC' h
} :2H]DDg(
K\wu9z8M
private int size=0; T;5VNRgpI
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private int[] queue; -.r"|\1X
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public int get() { :8(jhs
return queue[1]; 8!0fT}
} 1$1>cuu
3b\s;!
public void remove() { ]?)uYot
SortUtil.swap(queue,1,size--); c&1_lI,tH
fixDown(1); (V&8 WN
} pj<aMh
file://fixdown 2Y%7.YX"
private void fixDown(int k) { 5Q <vS"g
int j; *=O]^|]2
while ((j = k << 1) <= size) { 9+MW13?
if (j < size %26amp;%26amp; queue[j] j++; =dH=3iCG
if (queue[k]>queue[j]) file://不用交换 SHs [te[
break; T*mR9 8i
SortUtil.swap(queue,j,k); m_Pk$Vwx
k = j; epKr6 xq
} _p0gXb1m`
} yZ7)|j
private void fixUp(int k) { Vpp$yM&?
while (k > 1) { X $V_
int j = k >> 1; G62;p#
if (queue[j]>queue[k]) V,rR*a&p
break; u:']jw=f
SortUtil.swap(queue,j,k); n_4.`vs
k = j; Uj\t04
} M*bsA/Z
} Y-Q)sv
(&NLLrsio
} k~so+k&=b
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} :-#7j} R&
<{8x-zbR+
SortUtil： "=n%L +6%
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package org.rut.util.algorithm; Ky7.&6\n
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import org.rut.util.algorithm.support.BubbleSort; %,1TAmJfHa
import org.rut.util.algorithm.support.HeapSort; PYC
import org.rut.util.algorithm.support.ImprovedMergeSort; )Nx*T9!Q
import org.rut.util.algorithm.support.ImprovedQuickSort; wh8;:<|
import org.rut.util.algorithm.support.InsertSort; @67GVPcxl
import org.rut.util.algorithm.support.MergeSort; 0LXu!iix
import org.rut.util.algorithm.support.QuickSort; (SQGl!Lai0
import org.rut.util.algorithm.support.SelectionSort; *Gv:N6
import org.rut.util.algorithm.support.ShellSort; E.;Hm;
n:B){'S
/** A W6B[
* @author treeroot g33Y$Xdk
* @since 2006-2-2 :R=7dH~r
* @version 1.0 ]hy@5Jyh
*/ Du +_dr^4
public class SortUtil { QHja4/
public final static int INSERT = 1; WF*j^ %5
public final static int BUBBLE = 2; ?$ov9U_
public final static int SELECTION = 3; 8RuW[T?
public final static int SHELL = 4; TghT{h@
public final static int QUICK = 5; <$hv{a
public final static int IMPROVED_QUICK = 6; M:(.aEe
public final static int MERGE = 7; @YRy)+
public final static int IMPROVED_MERGE = 8; ?/1LueC:
public final static int HEAP = 9; a * CXg.i
7[0Mr,^
public static void sort(int[] data) { =w;-4
sort(data, IMPROVED_QUICK); -xLK/QAL
} ;nL7Hizo,
private static String[] name={ a#+$.e5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |A,.mOT
}; '5*&
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private static Sort[] impl=new Sort[]{ nC !NZ
new InsertSort(), h8%QF'C
new BubbleSort(), !-n*]C
new SelectionSort(), T%9t8?I
new ShellSort(), ]l h=ZC
new QuickSort(), ^i8biOSZu
new ImprovedQuickSort(), rN7JJHV
new MergeSort(), )g?jHm-p\
new ImprovedMergeSort(), & ^1 b]f
new HeapSort() ;qy;;usa
}; )(yaX
*Q?8OwhJ
public static String toString(int algorithm){ tS\Db'C7
return name[algorithm-1]; A-.Wd7^~*
} J E5qR2VA
Z_dL@\#|
public static void sort(int[] data, int algorithm) { K:qc "Q=C
impl[algorithm-1].sort(data); vol (%wB
} },}g](!m
t~dK\>L
public static interface Sort { x!W5'DO
public void sort(int[] data); wj0_X;L
} ltU{P|7!E
+:jv )4^O
public static void swap(int[] data, int i, int j) { 6Y6t.j0vN.
int temp = data; Y1>OhHuN
data = data[j]; RTbV!I
data[j] = temp; rx;;|eb,
} AqQ5L>:Gq
} ^V9|uHOJoq