[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; [d}1Cq=_
} r+crE %-
int i1=l; #wfR$Cd
int i2=mid+1; ;'kH<Iq
for(int cur=l;cur<=r;cur++){ d0d2QRX
if(i1==mid+1) YVi]f2F%
data[cur]=temp[i2++]; NgKNT}JDv
else if(i2>r) o=}?aC3I
data[cur]=temp[i1++]; ho. a93
else if(temp[i1] data[cur]=temp[i1++]; 4{=Em5`HbO
else M9nYt~vHX
data[cur]=temp[i2++]; o^_am>h
} jLg4_N1SD
} G.8ZISN/
W:G*t4i
} R<U<Y'Y
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改进后的归并排序: Ym6[~=~EK
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package org.rut.util.algorithm.support; ~yV0SpL
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import org.rut.util.algorithm.SortUtil; 3yDvr*8-@
j<u`W|vl
/** _'Z@ < ,L
* @author treeroot f32nO
* @since 2006-2-2 r=;k[*;{
* @version 1.0 M*Xzr .6
*/ BH^q.p_#>X
public class ImprovedMergeSort implements SortUtil.Sort { VPuzu|
\}5\^&}_
private static final int THRESHOLD = 10; Wk?XlCj
nBd;d}LD
/* Cb<\
* (non-Javadoc) F/h)azcn
* Z q)A"'Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Bs*s8}6
*/ 8in8_/x
public void sort(int[] data) { rQF%;
int[] temp=new int[data.length]; :HC{6W`$
mergeSort(data,temp,0,data.length-1); q :gH`5N
} >*&[bW'}?
/$E1!9J
private void mergeSort(int[] data, int[] temp, int l, int r) { %O-wMl
int i, j, k; G7u7x?E:B`
int mid = (l + r) / 2; 0X;Dr-3<
if (l == r) xM(
return; G8@%)$A
if ((mid - l) >= THRESHOLD) F-m1GG0s
mergeSort(data, temp, l, mid); e2>gQ p/
else 6xwC1V?:0t
insertSort(data, l, mid - l + 1); TA*49Qp
if ((r - mid) > THRESHOLD) 'sC{d&c
mergeSort(data, temp, mid + 1, r); LYT0 XB)A
else 'yl`0,3wV
insertSort(data, mid + 1, r - mid); -H{{
B; ~T|exu
for (i = l; i <= mid; i++) { z[B7k%}
temp = data; YS9|J=!~
} D .E>Y
for (j = 1; j <= r - mid; j++) { {"s8X(#_sC
temp[r - j + 1] = data[j + mid]; 7J\I%r
} H|P.q{(G
int a = temp[l]; wx<DzC
int b = temp[r]; [e(-
for (i = l, j = r, k = l; k <= r; k++) { 3=z'Ih`
if (a < b) { ,%u\2M
data[k] = temp[i++]; |yS4um(w
a = temp; |m~|
} else { 0@2%pIq\
data[k] = temp[j--]; ]C_6I\Z#=W
b = temp[j]; 18~j>fN
} 'O CVUF,
} U^.$k-|k
} Fik*7!XQ8
;kdJxxUox
/** b8O:@j2
* @param data JAYom%A"
* @param l +K&ze:-Z
* @param i MYu-[Hg
*/ % L]xar
private void insertSort(int[] data, int start, int len) { w$1.h'2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $uboOfS83G
} 7#Mi`W
} ]itvu:pl%
} UJO+7h'
} <w[)T`4N
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堆排序： !r$/-8b
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package org.rut.util.algorithm.support; /@q_`tU
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import org.rut.util.algorithm.SortUtil; T. {P}#'|
}V09tK/M
/** WFTTBUoH
* @author treeroot <[(xGrEZV
* @since 2006-2-2 )U5AnL
* @version 1.0 Dp>/lkk.
*/ V<1dA\I"
public class HeapSort implements SortUtil.Sort{ LqW~QEU(
\SyfEcSf2v
/* (non-Javadoc) nlh%O@,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?'^xO:
*/ 7&2xUcsz)
public void sort(int[] data) { pj'Yv
MaxHeap h=new MaxHeap(); ="MG>4j3.F
h.init(data); zvE]4}VL?
for(int i=0;i h.remove(); n{|~x":9V
System.arraycopy(h.queue,1,data,0,data.length); :[!rj
} r"^P>8
i9$ -lk
private static class MaxHeap{ Nq-qks.&
>[NNu Y~
void init(int[] data){ ZM0vB% M|
this.queue=new int[data.length+1]; "H6DiPh.E
for(int i=0;i queue[++size]=data; .F |yxj;I7
fixUp(size); @N34 Q-l
} ho 4~-xmN
} . F_pP2A
0D=6-P?^W
private int size=0; F@[l&`7
(|<}q-wO
private int[] queue; G3m+E;o1
zGA#7W2?0
public int get() { Ak&eGd$d
return queue[1]; h ~v8Q_6
} 90(JP-
`N;JM3 ck
public void remove() { 1InG%=jLo
SortUtil.swap(queue,1,size--); Ea 0 j}
fixDown(1); o#CNr5/
} 7iT#dpF/A
file://fixdown RWK|?FD\<
private void fixDown(int k) { 9/`T]s"
int j; W A-\2
while ((j = k << 1) <= size) { 'jqkDPn
if (j < size %26amp;%26amp; queue[j] j++; .*i.Z
if (queue[k]>queue[j]) file://不用交换 l.El3+
break; (6!W8x7
SortUtil.swap(queue,j,k); !np-Jmi
k = j; L~=h?C<
} c#Y/?F2p
} PIl:z?q({
private void fixUp(int k) { ~}+F$&
while (k > 1) { gM&XVhQJ\
int j = k >> 1; *i?#hTw
if (queue[j]>queue[k]) 9n%vz@X
break; XC%u`UG
SortUtil.swap(queue,j,k); l*^c?lp)
k = j; u8 Q`la
} M:rE^El
} &( aw
/{|JQ'gqX
} ZuH@qq\
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} <>%2HRn<u
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SortUtil： AhWcJD]
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package org.rut.util.algorithm; ~x4]^XS
bdbTK8-
import org.rut.util.algorithm.support.BubbleSort; t}w<xe
import org.rut.util.algorithm.support.HeapSort; b9X"p*'p
import org.rut.util.algorithm.support.ImprovedMergeSort; b8@?fC+tm
import org.rut.util.algorithm.support.ImprovedQuickSort; gwO]U=Y
import org.rut.util.algorithm.support.InsertSort; n|q$=jE
import org.rut.util.algorithm.support.MergeSort; clyZD`*
import org.rut.util.algorithm.support.QuickSort; _<}oBh
import org.rut.util.algorithm.support.SelectionSort; n.F^9j+V
import org.rut.util.algorithm.support.ShellSort; K+|G9
lsq\CavbM
/** L.X"wIs^
* @author treeroot wNMf-~
* @since 2006-2-2 Qa>t$`o`
* @version 1.0 21_sg f?
*/ &!N9.e:-]
public class SortUtil { %0&59q]LM
public final static int INSERT = 1; J;wDvt]]1
public final static int BUBBLE = 2; YMXhzqj
public final static int SELECTION = 3; @^R6}qJ
public final static int SHELL = 4; NAgm?d
public final static int QUICK = 5; ecvQEK2L
public final static int IMPROVED_QUICK = 6; ;iq H:wO
public final static int MERGE = 7; {0?^$R8j
public final static int IMPROVED_MERGE = 8; \3q Z0
public final static int HEAP = 9; #l 7(WG
!A":L0[7n
public static void sort(int[] data) { &Zy%Zz
sort(data, IMPROVED_QUICK); rJtpTV@.
} s`#g<_{X
private static String[] name={ jEu-CU#:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" o&-D[|E|
}; <!;NJLe`
r?7tI0
private static Sort[] impl=new Sort[]{ {?X:?M_
new InsertSort(), \l-JU
new BubbleSort(), `?=Y^+*!-
new SelectionSort(), *{<460`!q
new ShellSort(), wDp5HZ>
new QuickSort(), 0H!J
new ImprovedQuickSort(), -RI&uFqOI
new MergeSort(), :yxP3e%rp
new ImprovedMergeSort(), b,hRk1
new HeapSort() xlIVLv6dO
}; dj-/%MU
*jCHv
public static String toString(int algorithm){ &a8%j+j
return name[algorithm-1]; zt!)7HBo
} =W[M=_0u
~`yO@f;D
public static void sort(int[] data, int algorithm) { T0|hp7WM
impl[algorithm-1].sort(data); kltorlH
} ,76Q*p
^i[bo3
public static interface Sort { ,4mb05w;d
public void sort(int[] data); F rd>+
} tfIUH'Ez>
SiLWy=qbR
public static void swap(int[] data, int i, int j) { YgV"*~
int temp = data; t9~Y ?
data = data[j]; s7?d_+O
data[j] = temp; #KUNZW
} XcFu:B
} weH;,e*r