[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; ?Tt/,Hl?D
} /V-7u
int i1=l; .K;*uq:0
int i2=mid+1; \d%&_rp
for(int cur=l;cur<=r;cur++){ ` _[\j]
if(i1==mid+1) $Ob]JAf}
data[cur]=temp[i2++]; 23&;28)8
else if(i2>r) *+lnAxRa?
data[cur]=temp[i1++]; `L7 cS
else if(temp[i1] data[cur]=temp[i1++]; wzT+V,
else __'Z0?.4#
data[cur]=temp[i2++]; F2OU[Z,-]
} *cq#>rN
} ZXe[>H
|]Pigi7y-
} #li;L
^FF{71;
改进后的归并排序: H Viu7kue`
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package org.rut.util.algorithm.support; x(}@se
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import org.rut.util.algorithm.SortUtil; 3zMmpeq
6D_4o&N
/** <o^mQq&
* @author treeroot j?3J-}XC
* @since 2006-2-2 ?^5W.`Y2i
* @version 1.0 ps_CQh0
*/ ib*$3Fn~
public class ImprovedMergeSort implements SortUtil.Sort { 5"]PwC
R qOEQ*k
private static final int THRESHOLD = 10; SL>>]A,E<`
>c8zMd
/* $bD 3
* (non-Javadoc) ;x|4Tm
* l?Bv9k.^?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |`E\$|\p
*/ )u'oI_
public void sort(int[] data) { Pg|q{fc
int[] temp=new int[data.length]; m-7^$
mergeSort(data,temp,0,data.length-1); K\,&wU
} ex&&7$CXc
%pe7[/
private void mergeSort(int[] data, int[] temp, int l, int r) { d #y{eV$Q
int i, j, k; {;=+#QK/
int mid = (l + r) / 2; nLJ]tpw^DH
if (l == r) Y')in7g
return; ukzXQe;l1
if ((mid - l) >= THRESHOLD) _av%`bb&z9
mergeSort(data, temp, l, mid); bXC;6xZV
else b>&kL
insertSort(data, l, mid - l + 1); FV!
if ((r - mid) > THRESHOLD) 64hr|v
mergeSort(data, temp, mid + 1, r); ,`S"nq
else b;Q cBGwKT
insertSort(data, mid + 1, r - mid); (:vY:-\ bO
w9H%u0V?
for (i = l; i <= mid; i++) { +twJHf_U
temp = data; e8--qV#<
} ib;:*
for (j = 1; j <= r - mid; j++) { nke[}Hqf
temp[r - j + 1] = data[j + mid]; }eULcgRG
} /XtxgO\T.
int a = temp[l]; xAon:58m{
int b = temp[r]; )TVyRYZ1
for (i = l, j = r, k = l; k <= r; k++) { {6a";Xj\e
if (a < b) { z^ KrR
data[k] = temp[i++]; }7wQFKME
a = temp; c3g\*)Jz"F
} else { X;6&:%ZL@^
data[k] = temp[j--]; 4$1sBY/
b = temp[j]; p+#uPY1#
} ~?+Jt3?,
} "((6)U#
} htkn#s~=
s:i$s")
/** BVC\~j j
* @param data /J wQ5
* @param l ! FhN(L[=j
* @param i gV$Lfkz
*/ w3fi2B&q
private void insertSort(int[] data, int start, int len) { )xT_RBR
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); & i)p^AmM
} -8#Of)W
} ;UArDwH
} OAc+LdT
} r}pYm'e
pc:~_6S
堆排序： 0waQw7 E
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package org.rut.util.algorithm.support; \b{=&B[Q$'
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import org.rut.util.algorithm.SortUtil; !!DHfAV]
N=)N
/** GwxfnCKi9
* @author treeroot _u]Wr%D@
* @since 2006-2-2 +*lSB%`aS
* @version 1.0 1g^N7YF
*/ ro|dB
public class HeapSort implements SortUtil.Sort{ X<vv:
%dhnp9'
/* (non-Javadoc) AdKv!Ta5b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1`X{$mxw
*/ xpRQ"6
public void sort(int[] data) { gM^ Hs7o,
MaxHeap h=new MaxHeap(); Aum&U){yY
h.init(data); Kw"7M~
for(int i=0;i h.remove(); o3qBRT0[R
System.arraycopy(h.queue,1,data,0,data.length); u4rGe!
} 'HH[[9Q
zxT&K|
private static class MaxHeap{ v`*!Bhc-
Bd31> %6
void init(int[] data){ doW_vu
this.queue=new int[data.length+1]; #q6jE
for(int i=0;i queue[++size]=data; _ ?xORzO
fixUp(size); ?R#-gvX%
} R*'rg-d
} Go=MG:`
!J3g,p*
private int size=0; <;=?~QK%-
W(9-XlYKE
private int[] queue; QZYD;&iY&
Nd%,V
public int get() { .?@$Rd2@W
return queue[1]; j_j~BXhIS
} l]uF!']f
s1?N&t8c
public void remove() { &Plc
SortUtil.swap(queue,1,size--); [yW0U:m
fixDown(1); X8GIRL)lJ
} )8!""n~
file://fixdown !Hr~B.f7
private void fixDown(int k) { &?#V*-;^
int j; '[I?G6
while ((j = k << 1) <= size) { 69p>?zn
if (j < size %26amp;%26amp; queue[j] j++; OtBVfA:[
if (queue[k]>queue[j]) file://不用交换 g;UB+Y 247
break; d3St Z~&r!
SortUtil.swap(queue,j,k); `!K(P- yB?
k = j; 'W@X139zq
} x32hO;
} f)Z$,&
private void fixUp(int k) { 9h9 jS~h
while (k > 1) { }} J?, >g
int j = k >> 1; +>M^p2l*&
if (queue[j]>queue[k]) |'aGj
break; Vof[yL `
SortUtil.swap(queue,j,k); [h {zT)[
k = j; V<*PaS..
} p$`71w)'[
} [sy~i{Bm
Rr{mD#+
} 5N@k9x
;xS@-</:
} P\pHos
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SortUtil： [U5[;BNRD
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package org.rut.util.algorithm; _)"-zbh}{
g=XvqD<
import org.rut.util.algorithm.support.BubbleSort; yT.h[yv"w
import org.rut.util.algorithm.support.HeapSort; ^<}9#q/rt
import org.rut.util.algorithm.support.ImprovedMergeSort; ;}@.E@s%'
import org.rut.util.algorithm.support.ImprovedQuickSort; a` s2 z
import org.rut.util.algorithm.support.InsertSort; FAX|.!US*p
import org.rut.util.algorithm.support.MergeSort; sf<S#;aYqn
import org.rut.util.algorithm.support.QuickSort; MX2]Q
import org.rut.util.algorithm.support.SelectionSort; iVTC"v
import org.rut.util.algorithm.support.ShellSort; ;:4&nJ*qG
P<ElH3J`
/** ]bLI!2Kr
* @author treeroot u!hY bCB
* @since 2006-2-2 ;wK;
* @version 1.0 >E;kM B
*/ ZVs]_`(+
public class SortUtil { {p[{5k 0
public final static int INSERT = 1; sC1Mwx
public final static int BUBBLE = 2; )CJXkzOX
public final static int SELECTION = 3; -d1 YG[1|
public final static int SHELL = 4; zl^ %x1G
public final static int QUICK = 5; &kUEnwQ-
public final static int IMPROVED_QUICK = 6; `<2k.aW4e8
public final static int MERGE = 7; Q3[MzIk 4
public final static int IMPROVED_MERGE = 8; =(2y$,6g?
public final static int HEAP = 9; )S@e&a|
+pXYBwH 7Q
public static void sort(int[] data) { |;sL*Vr
sort(data, IMPROVED_QUICK); f>!)y-7
} c<bV3,
private static String[] name={ U*(/eEtd-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >HNBTc=~t
}; Ne#FBRu5
kl%%b"h'
private static Sort[] impl=new Sort[]{ M15Ce)oB1(
new InsertSort(), >cU#($X$^
new BubbleSort(), nWb*u
new SelectionSort(), @6h,#8#
new ShellSort(), nsn
new QuickSort(), d!0iv'^t
new ImprovedQuickSort(), 8?LsV<
new MergeSort(), >M~1{
new ImprovedMergeSort(), )Q= EmZbJz
new HeapSort() h K;9XJAf
}; -LzkM"
\A7{kI
public static String toString(int algorithm){ M$_E:u&D
return name[algorithm-1]; 0,~||H{
} ~wYGTm=(n
x3DUz
public static void sort(int[] data, int algorithm) { ,2oFt\`.r
impl[algorithm-1].sort(data); 3r^Ls[ey
} S!WG|75B
#O 2g]YH
public static interface Sort { "o_s=^U
public void sort(int[] data); y_mTO4\C2
} X})5XYvA*
^Gi9&fS,
public static void swap(int[] data, int i, int j) { 3PkVMX
int temp = data; Znr6,[U+q
data = data[j]; I;1W6uD=
data[j] = temp; |BGB60}]f
} |"}oGL6-
} HQ /D)D