[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; R`Q9|yF\
} |06G)r&
int i1=l; h T4fKc7P
int i2=mid+1; u"nyx0<
for(int cur=l;cur<=r;cur++){ tlc&Wx
if(i1==mid+1) i: 1V\q%
data[cur]=temp[i2++]; Tf` ~=fg%
else if(i2>r) QH;1*
data[cur]=temp[i1++]; o: qB#8X
else if(temp[i1] data[cur]=temp[i1++]; 68d(6?OgW
else \!`*F:7]-
data[cur]=temp[i2++]; |NL$? %I
} XBCz\f
} eQA89 :j,
xCGvLvFn
} zcDVvP
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改进后的归并排序: 7R ;!
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package org.rut.util.algorithm.support; D.X%wJ8
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import org.rut.util.algorithm.SortUtil; j$BM$q/c
8 "|')f#
/** dnH?@K
* @author treeroot .Q4EmpByCg
* @since 2006-2-2 yo3'\I
* @version 1.0 FK0nQ{uB"
*/ RaKL KZn
public class ImprovedMergeSort implements SortUtil.Sort { VcA87*pel
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private static final int THRESHOLD = 10; >$k_tC'"
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/* Gw$U0HA[,
* (non-Javadoc) o^biO!4,
* 0Kq\ oMn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T-uI CMEf
*/ MYDAS-
public void sort(int[] data) { M{1't
int[] temp=new int[data.length]; :(N3s9:vz
mergeSort(data,temp,0,data.length-1); x%5n&B
} XzkC ]e'
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private void mergeSort(int[] data, int[] temp, int l, int r) { =T!iM2
int i, j, k; eE+zL~CE
int mid = (l + r) / 2; 4cl}ouG
if (l == r) ZF>zzi+@
return; b1R%JY7/S
if ((mid - l) >= THRESHOLD) S!0<aFh
mergeSort(data, temp, l, mid); ==~X8k|{E
else 9H`Q |7g(5
insertSort(data, l, mid - l + 1); gM '_1zs U
if ((r - mid) > THRESHOLD) [YLaRr
mergeSort(data, temp, mid + 1, r); ['Hl$2 j
else 0PjWfM8%
insertSort(data, mid + 1, r - mid); k& 2U&
-$>R;L
for (i = l; i <= mid; i++) { LY-fp+
temp = data; ?l &S:` L
} p$0G EYwM
for (j = 1; j <= r - mid; j++) { IR(qjm\V
temp[r - j + 1] = data[j + mid]; Lp.,:z7
} $<OX\f%
int a = temp[l]; W c{<DE?J
int b = temp[r]; ]%!:'#
for (i = l, j = r, k = l; k <= r; k++) { M| :wC
if (a < b) { nRzD[3I
data[k] = temp[i++]; %A|9=x*
a = temp; 79^Y^.D
} else { _8v8qT}O~4
data[k] = temp[j--]; >,yE;zuw
b = temp[j]; tt$DWmm
} 9@9(zUS|
} ,6uON@
} |#^wYZO1U
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/** GWsvN&nr
* @param data ?%Hj,b
* @param l ycz6-kEp
* @param i )"`(+Ku&c
*/ ph qx<N@
private void insertSort(int[] data, int start, int len) { wuRQ H]N
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Z]V^s8>
} B4Ko,=pg
} |3<tDq@+
} W<_9*{|E;
} W$>srdG0$
5|z>_f.^pS
堆排序： t6(LO9Qc
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package org.rut.util.algorithm.support; OGpy\0%
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import org.rut.util.algorithm.SortUtil; @ qy n[C
SaceIV%(
/** aDceOhfx
* @author treeroot 6O"?wN%$
* @since 2006-2-2 |Ii[WfFA|J
* @version 1.0 R9@Dd
*/ E%8Op{zv_
public class HeapSort implements SortUtil.Sort{ v'na{"
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/* (non-Javadoc) ieo Naq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lQ(I/[qVd
*/ X67^@~l
public void sort(int[] data) { [CxnGeKK
MaxHeap h=new MaxHeap(); Mm7;'Zbg
h.init(data); q#s:2#=
for(int i=0;i h.remove(); +}1h
System.arraycopy(h.queue,1,data,0,data.length); &\6Buw_
} 7~&
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private static class MaxHeap{ Bp&7:snGt
IC"lsNq52
void init(int[] data){ .\)`Xj[?
this.queue=new int[data.length+1]; T-,T)R`R
for(int i=0;i queue[++size]=data; +U9m
fixUp(size); l Oxz&m
} n@%Q 2_
} {&7%wZ"t_
M:TN^ rA|
private int size=0; T1$=0VSEa+
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private int[] queue; zNG]v?JAh
.Z?@;2<l
public int get() { T<XGG_NOl
return queue[1]; 8k[=$Ro
} p6S{OUiG
|y%pJdPk=
public void remove() { W3Gg<!*Uo
SortUtil.swap(queue,1,size--); zy8Z68%E`*
fixDown(1); Dnk}
} l/*NscYtQ
file://fixdown 6="Qwrk
private void fixDown(int k) { 0SS,fs<w3
int j; X;:qnnO
while ((j = k << 1) <= size) { :)JIKP%$\)
if (j < size %26amp;%26amp; queue[j] j++; C?dQ QB$
if (queue[k]>queue[j]) file://不用交换 Odn`q=
break; )T0%<(J
SortUtil.swap(queue,j,k); ~V34j:
k = j; _L8|ZV./
} "2'4b
} IhR;YM[K
private void fixUp(int k) { pzr\<U`
while (k > 1) { '0b!lVe
int j = k >> 1; n<,:;0{
if (queue[j]>queue[k]) mH`K~8pRg
break; LK>AC9ak<
SortUtil.swap(queue,j,k); ?58,Ja
k = j; |; [XZ ZZ
} p9X{E%A<:
} r<MW8
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} v[l={am{/
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} ,]Gi942
};{Qx
SortUtil： CU`yi.)T{
WNnB s
package org.rut.util.algorithm; b;;mhu[D
6Dl]d%.
import org.rut.util.algorithm.support.BubbleSort; EN2H[i+,
import org.rut.util.algorithm.support.HeapSort; pZxuV(QP`
import org.rut.util.algorithm.support.ImprovedMergeSort; bT>1S2s
import org.rut.util.algorithm.support.ImprovedQuickSort; 2|a5xTzH
import org.rut.util.algorithm.support.InsertSort; #3~hF)u&/
import org.rut.util.algorithm.support.MergeSort; |7CFm
import org.rut.util.algorithm.support.QuickSort; [LF<aR5
import org.rut.util.algorithm.support.SelectionSort; ^QG;:.3v
import org.rut.util.algorithm.support.ShellSort; h4,g pV>t
MA`.&MA.
/** B+VD53 V
* @author treeroot aw\0\'}
* @since 2006-2-2 L$zB^lSM
* @version 1.0 1XppC[))
*/ !+EE*-c1c
public class SortUtil { E\Qm09Dj`<
public final static int INSERT = 1; qrr[QEFW
public final static int BUBBLE = 2; [z[<onFIq
public final static int SELECTION = 3; /LK,:6
public final static int SHELL = 4; F`Ld WA
public final static int QUICK = 5; D$?}M>
public final static int IMPROVED_QUICK = 6; [ !<
public final static int MERGE = 7; XG!s+ShFV
public final static int IMPROVED_MERGE = 8; kVRh/<s
public final static int HEAP = 9; TC* 78;r
mVsghDESJ)
public static void sort(int[] data) { ` W}Bc
sort(data, IMPROVED_QUICK); OF1fS\P<>
} sx^0*h-Qq
private static String[] name={ -dyN Ah?=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" x=I|O;"><
}; 5 (cgHr"
5>x?2rp
private static Sort[] impl=new Sort[]{ a%YohfsY?U
new InsertSort(), lKSd]:3Xm
new BubbleSort(), S_ER^Pkg
new SelectionSort(), }K.2
new ShellSort(), o"gtWAGH
new QuickSort(), Dg=!d)\
new ImprovedQuickSort(), u*6Y>_iA
new MergeSort(), umuE5MKY<
new ImprovedMergeSort(), $! R]!s
new HeapSort() dd-`/A@
}; !Y,*Zc$R
&;2@*#,
public static String toString(int algorithm){ NsN =0ff
return name[algorithm-1]; I]iTD
} Yw6^(g8
;RzbPlkl
public static void sort(int[] data, int algorithm) { V;IV2HT0J"
impl[algorithm-1].sort(data); ;oM7H*WC
} @%b&(x^UD
FoKAF &h7
public static interface Sort { N<e72x
public void sort(int[] data); kSUpEV+/
} !(i}FFn{:
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public static void swap(int[] data, int i, int j) { _I/uW|>
int temp = data; [XbNZ6
data = data[j]; %8c2d
data[j] = temp; M"\j7(
} f=--$o0U~
} +t7n6