[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; Vwh;QJxb
} e.%I#rNI
int i1=l; j2u'5kJ G
int i2=mid+1; @U1|?~M%s
for(int cur=l;cur<=r;cur++){ Iz. h
if(i1==mid+1) q9j~|GE|
data[cur]=temp[i2++]; bu_@A^ys
else if(i2>r) e!gNd>b {
data[cur]=temp[i1++]; dzAumWoh
else if(temp[i1] data[cur]=temp[i1++]; V\{@c%xW
else T#E$sZ
data[cur]=temp[i2++]; /#(IV_Eol
} 2y!aXk\#C
} jl(D;JnF
]y=U"g
} x$n.\`f0
HR8YPU5
改进后的归并排序: L[Z^4l_!
1hgIR^;[b
package org.rut.util.algorithm.support; C,W_0=!e
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import org.rut.util.algorithm.SortUtil; gT$WG$^i
rg k1.0U0
/** e@0|fB%2
* @author treeroot )xa)$u
* @since 2006-2-2 %N~c9B
* @version 1.0 p}1gac_c
*/ <Z3C&BM
public class ImprovedMergeSort implements SortUtil.Sort { iv6G9e{cx
YjTr49Af0
private static final int THRESHOLD = 10; 5CN=a2&
fx(8 o+
/* f>C+l(
* (non-Javadoc) XE<5(
* Dbj?l;'1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |^UQVNJ
*/ /4pYhJ8S
public void sort(int[] data) { #@`c7SR
int[] temp=new int[data.length]; 3?"gfw W
mergeSort(data,temp,0,data.length-1); #TR!x,Hc
} L%5y@b{AR
f&^}yqmuE
private void mergeSort(int[] data, int[] temp, int l, int r) { ciml:"nQ
int i, j, k; m)pHCS
int mid = (l + r) / 2; >h#juO"
if (l == r) R(^Sse
return; 6c-'CW
if ((mid - l) >= THRESHOLD) R--s u:
mergeSort(data, temp, l, mid); uchQv]VB
else l{C]0^6>i
insertSort(data, l, mid - l + 1); db_?da;!`
if ((r - mid) > THRESHOLD) r`6f
mergeSort(data, temp, mid + 1, r); kjV>\e
else 4To$!=
insertSort(data, mid + 1, r - mid); 8YRT0/V
e#h&Xa
for (i = l; i <= mid; i++) { YQ?hAAJ
temp = data; lg$aRqI29
} i>h3UIx\
for (j = 1; j <= r - mid; j++) { 45.g;
temp[r - j + 1] = data[j + mid]; yQj J-g(.
} Ar/P%$Zfq
int a = temp[l]; c)^A|{,G
int b = temp[r]; oowofi(E
for (i = l, j = r, k = l; k <= r; k++) { p7`9 d1n
if (a < b) { t6KKfb
data[k] = temp[i++]; 6-"tQ,AZ
a = temp; =#9#unvE!
} else { MDIPoS3BRa
data[k] = temp[j--]; -th.(eAx
b = temp[j]; vmkiw1
} iH-,l
} |iBf6smF
} iExKi1knx
X4hz\={
/** ivl %%nY'
* @param data lc5(^~
* @param l 'J&R=MD
* @param i iY@}Q "
*/ %4x0^<k~
private void insertSort(int[] data, int start, int len) { oO?+2pTQV
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); JLWm9c+UTG
} ^u$=<66
} wVf 7<@/y
} dgX%NKv1
} jMI30
Z D"*fr
堆排序： ERK{smL
#| gh
package org.rut.util.algorithm.support; >ZPu$=[W
LHZsmUM(dg
import org.rut.util.algorithm.SortUtil; s1Wn.OGR4
Sb2_&5
/** 5X];?(VTsb
* @author treeroot oaq,4FT
* @since 2006-2-2 Er@xrhH
* @version 1.0 f&5S`}C
*/ .tfal9
public class HeapSort implements SortUtil.Sort{ m!<FlEkN
hUvA;E(qD
/* (non-Javadoc) lAA6tlc#C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pl,XS6mB
*/ NqKeQezX
public void sort(int[] data) { TK'y-5W
MaxHeap h=new MaxHeap(); J#@+1 Nt
h.init(data); u"hr4+/
for(int i=0;i h.remove(); y[jp)&N`
System.arraycopy(h.queue,1,data,0,data.length); kl1Q:
} N,9~J"z
@ kv~2m
private static class MaxHeap{ Xu#?Lw
A\7sP =
void init(int[] data){ RlvvO
this.queue=new int[data.length+1]; V{>;Z vj1R
for(int i=0;i queue[++size]=data; ~n0Exw(
fixUp(size); =$^}"}$
} P$h) Y
} M!gu`@@}F
+B+cN[d
private int size=0; *&_A4)
xo ^|d3
private int[] queue; W95q1f#7
>N`, 3;Z
public int get() { dn42'(p@G
return queue[1]; ^-~=U^2tC
} 'MyJw*%b]
q:jv9eL.O
public void remove() { '_K`1&#U
SortUtil.swap(queue,1,size--); J- l[dC
fixDown(1); 9~K>c
} b/#<::D `
file://fixdown NX;{L#lQ
private void fixDown(int k) { 8"ZcKxDk
int j; Ft:_6T%
while ((j = k << 1) <= size) { 4RQ38%> >j
if (j < size %26amp;%26amp; queue[j] j++; F$:mGyl5_
if (queue[k]>queue[j]) file://不用交换 ecvZwL
break; v=uQ8_0~N
SortUtil.swap(queue,j,k); l:#'i`;
k = j; *z~J ]
} chuJj IY
} >: @\SU
private void fixUp(int k) { Fghan.F
while (k > 1) { eIPk$j{e
int j = k >> 1; .rDao]K
if (queue[j]>queue[k]) lY[1P|]
break; Xh~oDnP
SortUtil.swap(queue,j,k); D[YdPg@-
k = j; ZiH4s|
} mII8jyg*c
} X0$?$ta
fv>Jn`
} qX[C%
1o
} Fk`6 q
'@QK<!%,
SortUtil： d;r,?/C
O=1#KNS
package org.rut.util.algorithm; D9r;Ys%
@$!"}xDR'
import org.rut.util.algorithm.support.BubbleSort; \/y&l\ k)
import org.rut.util.algorithm.support.HeapSort; %+ MYg^
import org.rut.util.algorithm.support.ImprovedMergeSort; |ew:}e: k<
import org.rut.util.algorithm.support.ImprovedQuickSort; kY~yA2*G
import org.rut.util.algorithm.support.InsertSort; L{c\7
import org.rut.util.algorithm.support.MergeSort; ~;wR}s<}(
import org.rut.util.algorithm.support.QuickSort; SQw"mO
import org.rut.util.algorithm.support.SelectionSort; Zk gj_
import org.rut.util.algorithm.support.ShellSort; xtXK3[s
Zl2doXC
/** "1ZVuI
* @author treeroot I?<ibLpX
* @since 2006-2-2 kf)s3I/`(
* @version 1.0 t 9.iWIr
*/ I]d?F:cdX
public class SortUtil { &#]||T-
public final static int INSERT = 1; 34vH+,!u
public final static int BUBBLE = 2; -r{]9v2j
public final static int SELECTION = 3; lWU? R
public final static int SHELL = 4; wmX *n'l
public final static int QUICK = 5; Pv8AWQQJ
public final static int IMPROVED_QUICK = 6; ^DR`!.ttr
public final static int MERGE = 7; D4+OWbf6
public final static int IMPROVED_MERGE = 8; [rhK2fr:i
public final static int HEAP = 9; vRO`hGH
hN1{?PQ
public static void sort(int[] data) { 6rAenK-%
sort(data, IMPROVED_QUICK); w6k^|."
} _3_o/I
private static String[] name={ 4+0:(=>[%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" LoS%FI
}; }e,*'mCC*
?)+I'lW!
private static Sort[] impl=new Sort[]{ )$FwB6^
new InsertSort(), ^eqq|(<K
new BubbleSort(), UrB{jS?
new SelectionSort(), 4*+)D8
new ShellSort(), 2`h
new QuickSort(), Pexg"328
new ImprovedQuickSort(), zDA;FKZPp
new MergeSort(), [Q20c<,
new ImprovedMergeSort(), G]fx3=
new HeapSort() j&=!F3[
}; -B#>Jn#F
U_Va'7
public static String toString(int algorithm){ ;jpsH?3g
return name[algorithm-1]; ?bK^IHh
} }o#6g|"\sY
QW}N,j$
public static void sort(int[] data, int algorithm) { yi3Cd@t({{
impl[algorithm-1].sort(data); Zo36jSrCL
} ^T/d34A;SP
/*{s1Zcb
public static interface Sort { 5i1Xumh 4
public void sort(int[] data); \P0>TWE
} q%GlS=o"
$[8GFv
public static void swap(int[] data, int i, int j) { gS4@3BOw&.
int temp = data; '0>w_ge4
data = data[j]; 2p|[yZ
data[j] = temp; p_2-(n@
} k9?fE
} seEG~/U<