[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; z^KBV^n
} n?^oQX}.\
int i1=l; l~1l~Gx_&n
int i2=mid+1; \H PB{ ;
for(int cur=l;cur<=r;cur++){ sA"B/C|(g
if(i1==mid+1) \<}e?Yx%
data[cur]=temp[i2++]; gZz5P>^
else if(i2>r) mX@xV*
data[cur]=temp[i1++]; xf:|lQf
else if(temp[i1] data[cur]=temp[i1++]; tOQnxKzu
else /I`-
data[cur]=temp[i2++]; k1D|Cpnp
} 6SAYe%e
} zP!j {y4w
dHn,;Vv^6
} PMj!T \B|
$U^ Ms!'L
改进后的归并排序: V1,4M_Z
xiC.M6/
package org.rut.util.algorithm.support; u3 4.
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import org.rut.util.algorithm.SortUtil; gHH[QLD=I
IV`+B<3
/** )\izL]=!t
* @author treeroot eN TKX
* @since 2006-2-2 _^0UK|[
* @version 1.0 y&F&Z3t
*/ PC?XE8o
public class ImprovedMergeSort implements SortUtil.Sort { DnB :~&Dw
\VAS<?3
private static final int THRESHOLD = 10; 2;SiH]HNS
@7?L+.r$9
/* nG| NRp
* (non-Javadoc) |)ALJJ=+
* 3qp\jh=FE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v?q)E%5j
*/ p"Di;3!y!
public void sort(int[] data) { .Jc<Gg
int[] temp=new int[data.length]; )c0Dofhg
mergeSort(data,temp,0,data.length-1); phcYQqR
} {%Q+Pzl.
<q4<3A
private void mergeSort(int[] data, int[] temp, int l, int r) { }K 2fwE
int i, j, k; |s !7U
int mid = (l + r) / 2; W_]onq6
if (l == r) [Al}GM
return; Ch&2{ng
if ((mid - l) >= THRESHOLD) l4E0/F
mergeSort(data, temp, l, mid); k`0m|<$
else Q,>]f@m
insertSort(data, l, mid - l + 1); {@X)=.Zf
if ((r - mid) > THRESHOLD) _s0;mvz'
mergeSort(data, temp, mid + 1, r); b;G#MjQp'
else 3gs7Xj%N
insertSort(data, mid + 1, r - mid); Gl>*e|}
j@jUuYuDgl
for (i = l; i <= mid; i++) { 0SDyE
temp = data; @ql S #(
} 8SO(pw9
for (j = 1; j <= r - mid; j++) { FlLk.+!t
temp[r - j + 1] = data[j + mid]; t\,XG
} $_W kI^
int a = temp[l]; =iWn T
int b = temp[r]; wvEdZGO8!
for (i = l, j = r, k = l; k <= r; k++) { :T/I%|;f
if (a < b) { _Qf310oONS
data[k] = temp[i++]; Y$eO:67;
a = temp; lMb&F[KJ7
} else { -=4:qQEw
data[k] = temp[j--]; f]kG%JEK
b = temp[j]; \hqjk:o
} bR83N
} *)qxrBc0
} \ UiITP<
rIAbr5CG
/** ks(BS k4
* @param data J4m2|HK
* @param l vqJq=\ .m
* @param i ~|8-Mo1ce
*/ 2fMKS
private void insertSort(int[] data, int start, int len) { S,qEKWyLd
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); jtQ}
} t`"pn<
} y9Q.TL>=[
} te#Wv9x
} 0{.[#!CSk
t|}}#Z!I[f
堆排序： pn aSOyR
/9@VnM
package org.rut.util.algorithm.support; @A8@j%CK1
j4]y(AA
import org.rut.util.algorithm.SortUtil; Q;eY]l8
"|d# +C
/** bm-&H
* @author treeroot %v<BE tq
* @since 2006-2-2 y3@5~4+
* @version 1.0 _ v3VUm#
*/ Hus.Jfam
public class HeapSort implements SortUtil.Sort{ Pbl#ieZM
)&.Zxo;q=
/* (non-Javadoc) ;a~ e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t'e5!Ma
*/ DDp\*6y3l
public void sort(int[] data) { t,308Z
MaxHeap h=new MaxHeap(); h=MEQ-3jg
h.init(data); -~`)V`@
for(int i=0;i h.remove(); 18G=j@k7
System.arraycopy(h.queue,1,data,0,data.length); RfzYoBN
} e4Q2$Q@b
yuq2)
private static class MaxHeap{ )PjU=@$lI
nm]m!.$d
void init(int[] data){ o6)U\z
this.queue=new int[data.length+1]; OH6-\U'.Z
for(int i=0;i queue[++size]=data; }]|e0 w:
fixUp(size); 5T]dQ3[v4
} _.^`DP>
} fsUZG6
w'a3=_nW
private int size=0; UKp^TW1^
4*V[^mht
private int[] queue; z--Y
4>(rskl_
public int get() { IQQ QB
return queue[1]; $9?<mP2-*
} hf< [$B
@5*$yi 'Cp
public void remove() { dc,qQM
SortUtil.swap(queue,1,size--); b-HELS`nX
fixDown(1); C,VvbB
} E5g|*M.+f
file://fixdown &ZI-#(P
private void fixDown(int k) { zAH6SaI$
int j; b r\_
while ((j = k << 1) <= size) { IRT0
if (j < size %26amp;%26amp; queue[j] j++; n|eM}ymF+
if (queue[k]>queue[j]) file://不用交换 Nyl)B7/w
break; cSYMnB
SortUtil.swap(queue,j,k); A/88WC$v
k = j; g,s^qW0vds
} <j:@ iP
} Z^_gS&nDa~
private void fixUp(int k) { YZ^mH <
while (k > 1) { 40HhMTZ0-
int j = k >> 1; #;/ob-
if (queue[j]>queue[k]) ,#K{+1z:
break; YpEH(tq
SortUtil.swap(queue,j,k); ##a.=gl
k = j; 1;eWnb(
} W}M3z
} cr~.],$Om
U[W &D%'
} dK>sHUu
LyRW\\z2
} I*H($ a
QVo>Uit
SortUtil： 3a}53?$
CI^s~M >
package org.rut.util.algorithm; >Et~h65d5
LpN3cy>U
import org.rut.util.algorithm.support.BubbleSort; ;Pe=cc"@
import org.rut.util.algorithm.support.HeapSort; |G/WS0
import org.rut.util.algorithm.support.ImprovedMergeSort; 2ae"Sd!-2
import org.rut.util.algorithm.support.ImprovedQuickSort; <"{VVyK
import org.rut.util.algorithm.support.InsertSort; }mpFo2
import org.rut.util.algorithm.support.MergeSort; BRXDE7vw
import org.rut.util.algorithm.support.QuickSort; d:=Z<Y?d/
import org.rut.util.algorithm.support.SelectionSort; 1H \
import org.rut.util.algorithm.support.ShellSort; cc0Tb
'PWA
/** @S1Z"%S
* @author treeroot Ty}Y/jW
* @since 2006-2-2 @;}vK=6L
* @version 1.0 H h35cj
*/ __}ut+H^5p
public class SortUtil { l"/E,X
public final static int INSERT = 1; m}6Jdt'|
public final static int BUBBLE = 2; -`UOqjb]3
public final static int SELECTION = 3; "v/Yw'! )
public final static int SHELL = 4; P|t2%:_
public final static int QUICK = 5; o+Fm+5t;
public final static int IMPROVED_QUICK = 6; Ako]34Rl,
public final static int MERGE = 7; IYv.~IQO
public final static int IMPROVED_MERGE = 8; CV)K=Br5&_
public final static int HEAP = 9; $i%#fN
{@hJPK8
public static void sort(int[] data) { RoNE7|gF:
sort(data, IMPROVED_QUICK); 6B+?X5-6DH
} nWA>u J5
private static String[] name={ w@pJ49
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" N9 h|_ax
}; ]A%~bQ7
\}W !
private static Sort[] impl=new Sort[]{ !6,rN_a@Y
new InsertSort(), v[V7$.%5Q
new BubbleSort(), v2k@yxt(
new SelectionSort(), tXcZl!3x
new ShellSort(), s"R5'W\U
new QuickSort(), N5zx#g
new ImprovedQuickSort(), Po*!eD
new MergeSort(), & H8 %
new ImprovedMergeSort(), 3n~O&{
new HeapSort() qiH)J- ~GZ
}; J&&)%&h'I
}42Hhu7j
public static String toString(int algorithm){ NS-0-o|4#
return name[algorithm-1]; o2[$XONTl
} 8:[ l1d86
|K9*><P?)2
public static void sort(int[] data, int algorithm) { 9sI&d
impl[algorithm-1].sort(data); *7b?.{
} nw(R=C
vo(:g6$
public static interface Sort { *HB 32 =qD
public void sort(int[] data); gegM&Xo
} H4W!Md
'2 Y8
public static void swap(int[] data, int i, int j) { 7M8cF>o
int temp = data; }B_?7+
data = data[j]; 70 Ph^e)
data[j] = temp; r6GXmr
} Kg`P@
} X,bhX/h