[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; ej4xW~_
} 3T+#d-\
int i1=l; /:~mRf^
int i2=mid+1; _r^Cu.[7
for(int cur=l;cur<=r;cur++){ y?zNxk/p
if(i1==mid+1) :?O+EE
data[cur]=temp[i2++]; 2aNCcZw0
else if(i2>r) 37Q9goMov
data[cur]=temp[i1++]; Z4b<$t[u
else if(temp[i1] data[cur]=temp[i1++]; f4@>7K]9TA
else 0V}knR.l
data[cur]=temp[i2++]; 'x$>h)t]
} >T'^&l(:
} CuR.a
Wz`MEyj
} Z^zUb
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改进后的归并排序: 3){ /u$iH.
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package org.rut.util.algorithm.support; "u@)
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import org.rut.util.algorithm.SortUtil; 0B7cpw>_J
07:CcT
/** oj/,vO:QT
* @author treeroot Yg3Vj=
* @since 2006-2-2 _3i.o$GO
* @version 1.0 _l<e>zj
*/ 8!(4;fN$j.
public class ImprovedMergeSort implements SortUtil.Sort { 9TuE.
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private static final int THRESHOLD = 10; RP?UKOc
S:"R/EE(
/* p(-f$Q(
* (non-Javadoc) IxNY%&* `
* n}Pz:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h&|q>M3
*/ @)owj^sA
public void sort(int[] data) { 2K0HN
int[] temp=new int[data.length]; ]@wee08
mergeSort(data,temp,0,data.length-1); 6`Zx\bPDm
} ;5urIYd
z~i=\/~tZ
private void mergeSort(int[] data, int[] temp, int l, int r) { Yx>y(Whu.
int i, j, k; 16Ym*kWIps
int mid = (l + r) / 2; V<A_c^unO
if (l == r) EdbLAagI6
return; ;4tmnC>OnA
if ((mid - l) >= THRESHOLD) M@ t,P?
mergeSort(data, temp, l, mid); >1 {V
else B! $a Y
insertSort(data, l, mid - l + 1); >|1.Z'r/
if ((r - mid) > THRESHOLD) 0.7*2s-
mergeSort(data, temp, mid + 1, r); *.nC'$-2r
else c((^l&
insertSort(data, mid + 1, r - mid); 1iyd{r7|
F0 x5(lpQ
for (i = l; i <= mid; i++) { ?nN3K
temp = data; $Hh3*reSg-
} _?$P?
for (j = 1; j <= r - mid; j++) { MLf,5f;e
temp[r - j + 1] = data[j + mid]; !|}(tqt
} A14}
int a = temp[l]; Hyx%FN=
int b = temp[r]; &.~Xl:lq
for (i = l, j = r, k = l; k <= r; k++) { = zJY5@^'7
if (a < b) { ME4Ir
data[k] = temp[i++]; t_%6,?S6
a = temp; MDI[TNYG
} else { rWzw7T~
data[k] = temp[j--]; 1<g,1TR
b = temp[j]; aMI\gCB/
} *ElR
} J}a 8N.S
} 46^LPC"x
"_dh6naZX
/** <4V]>[{W
* @param data =gL~E9\
* @param l fS2 ^$"B|
* @param i H=Sy.
*/ yv2BbrYyy
private void insertSort(int[] data, int start, int len) { }H2<w-,+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); jF4h/((|EU
} H]>b<Cs
} z@5t7e)!R
} (9R;a np
} ~{MmUp rS
u7R:7$H
堆排序： pI*/-!I
c}(fmJB&(
package org.rut.util.algorithm.support; an!ceB
;`ZGiax
import org.rut.util.algorithm.SortUtil; Id-?her>B
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/** t<'-?B2g
* @author treeroot ^@V$'Bk
* @since 2006-2-2 &d/v/Y
* @version 1.0 2Hltgt,
*/ e]N?{s
public class HeapSort implements SortUtil.Sort{ G;r-f63N
'Y`.0T[&
/* (non-Javadoc) QI\&D)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i&KD)&9b#
*/ ~]t/|xep
public void sort(int[] data) { ;yh}$)^9
MaxHeap h=new MaxHeap(); w s(9@
h.init(data); 7kbeAJ+{
for(int i=0;i h.remove(); |%6zhkoufM
System.arraycopy(h.queue,1,data,0,data.length); \VJ7ahg[\
} tTa" JXG
'&_<!Nv3
private static class MaxHeap{ uYk4qorA
doJ\7c5uU
void init(int[] data){ ZUE?19GA
this.queue=new int[data.length+1]; ^'"sFEV7RN
for(int i=0;i queue[++size]=data; WR;"^<i9
fixUp(size); LeY!A#j
} zD8q(]: A
} WHh=hts\
+;nADl+Q
private int size=0; n|,kL!++.
cZnB 2T?
private int[] queue; =l&A9 >\
tF> ?]
public int get() { W/Rb7q4v
return queue[1]; 0:<dj:%M
} B5%N@g$`j
JpuF6mQ
public void remove() { t-#Y6U}b+
SortUtil.swap(queue,1,size--); \W73W_P&g
fixDown(1); H}KJd5A7
} !wl3}]q
file://fixdown (bP\_F5D
private void fixDown(int k) { e%#8]$
int j; Q<]~>cd^
while ((j = k << 1) <= size) { vF45tw
if (j < size %26amp;%26amp; queue[j] j++; Oh9jr"Gm=
if (queue[k]>queue[j]) file://不用交换 0q_Ol]<V
break; muSQFIvt
SortUtil.swap(queue,j,k); k]*DuVCOX
k = j; x+h7OvW{
} ,O=@I
} ,"/<N*vh
private void fixUp(int k) { $;<h<#_n;
while (k > 1) { G $u:1&
int j = k >> 1; 'ad|@Bh
if (queue[j]>queue[k]) wzAp`Zs2Dm
break; r>lC(x\B
SortUtil.swap(queue,j,k); % ~%>3
k = j; 6"Tr$E
} #mqz*=L3
} NJ-cP m
uQ9/7"S
} }-{l(8-
=dbLA ,z9
} 9\W~5J<7
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SortUtil： 5gq3 >qo
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package org.rut.util.algorithm; ~Ra1Zc$o:
\$J!B&i
import org.rut.util.algorithm.support.BubbleSort; VHsNz WI
import org.rut.util.algorithm.support.HeapSort; %^RlE@l9
import org.rut.util.algorithm.support.ImprovedMergeSort; r]1|I6:&)
import org.rut.util.algorithm.support.ImprovedQuickSort; g<~[k?~J
import org.rut.util.algorithm.support.InsertSort; hB:R8Y^?H
import org.rut.util.algorithm.support.MergeSort; Fs:l"5~>1
import org.rut.util.algorithm.support.QuickSort; Jrlc%,pZ
import org.rut.util.algorithm.support.SelectionSort; BY: cSqAW
import org.rut.util.algorithm.support.ShellSort; whP>'9t.w
(E)/' sEb
/** Xmy(pV!PF
* @author treeroot ]4@z.1Mr
* @since 2006-2-2 Dbr(Wg
* @version 1.0 st36xS
*/ /IVw}:G
public class SortUtil { fw^mjD
public final static int INSERT = 1; *>.~f<V
public final static int BUBBLE = 2; #m9V)1"wB
public final static int SELECTION = 3; #'z\[^vp
public final static int SHELL = 4; WPyd ^Y<
public final static int QUICK = 5; ee&QZVL>
public final static int IMPROVED_QUICK = 6; {rOz[E9vm
public final static int MERGE = 7; lqPRUkin
public final static int IMPROVED_MERGE = 8; 9&}qie,
public final static int HEAP = 9; ?|^1-5l3
ihH!"HH+
public static void sort(int[] data) { +7+ VbsFG
sort(data, IMPROVED_QUICK); ?"AcK"v
} rjU $*+
private static String[] name={ V&KH{j/P
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" xPqpNs-,
}; Z<y+D-/
|6\ ?"#
private static Sort[] impl=new Sort[]{ _}Jz_RS2`
new InsertSort(), Yl1@gw7
new BubbleSort(), zEY Ey1
new SelectionSort(), >T~{_|N
new ShellSort(), =]7|*-
new QuickSort(), ]5td,2E C
new ImprovedQuickSort(), Mz]LFM
new MergeSort(), >C_! }~
new ImprovedMergeSort(), (m3p28Q?
new HeapSort() [sz#*IJ
}; : M0LAN
.(;k]UP
public static String toString(int algorithm){ txr!3-Ne'!
return name[algorithm-1]; \@OKB<ra
} zy@ #R;
& A9psc(,&
public static void sort(int[] data, int algorithm) { _F^|n}Qbj
impl[algorithm-1].sort(data); 6@o_MtI
} bz H5Lc{%
2~h)'n7Mw
public static interface Sort { x)#k$QU
public void sort(int[] data); }9P)<[>
} U$VTk
;?inf`t
public static void swap(int[] data, int i, int j) { uK(+WA
int temp = data; & PHHacp
data = data[j]; E_?3<)l)RI
data[j] = temp; Q;r 0#"
} 7F?^gMi
} ; @Gm@d