[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; tIq>Oojdx
} *)limqe3"$
int i1=l; ?h/xAl
int i2=mid+1; e8$l0gzaD
for(int cur=l;cur<=r;cur++){ drW~)6Lr@
if(i1==mid+1) ePf+[pV3
data[cur]=temp[i2++]; Dc08D4
else if(i2>r) (+|X<Bl:`
data[cur]=temp[i1++]; LmP qLH'(Q
else if(temp[i1] data[cur]=temp[i1++]; q5Fs)B
else YiD-F7hf.*
data[cur]=temp[i2++]; ]JOephX2R
} k*5'L<&
} 24#bMt#^
!Citzor
} Ls&+XlrX8
JkZ50L
改进后的归并排序: 25UYOK}!
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package org.rut.util.algorithm.support; R)ERxz#
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import org.rut.util.algorithm.SortUtil; <lUOJV{&\
_`H.h6h
/** K&*iw`
* @author treeroot <"W?<VjO
* @since 2006-2-2 [+;qWfs B
* @version 1.0 {@?G 9UypA
*/ Ck: 9gn
public class ImprovedMergeSort implements SortUtil.Sort { Rj^7#,993
t)` p@]j
private static final int THRESHOLD = 10; m9Ax\lf
OFA{ KZga
/* 3P1&;
* (non-Javadoc) ~ |6dH
* :M06 ;:e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (ab{F5
*/ r#A_RZ2~@
public void sort(int[] data) { 2K;#Evn'j
int[] temp=new int[data.length]; 7c-Gm R2
mergeSort(data,temp,0,data.length-1); iZaeoy
} "NDxgJ%J35
rz6uDJ"
private void mergeSort(int[] data, int[] temp, int l, int r) { :p' VbQZ{
int i, j, k; qz9tr
int mid = (l + r) / 2; ~3gru>qI&
if (l == r) Y$g}XN*)E
return; `-_N@E1'>
if ((mid - l) >= THRESHOLD) s2FngAM;f
mergeSort(data, temp, l, mid); 98fu>>*G{
else l[ne/O JJ
insertSort(data, l, mid - l + 1); Ir5WN_EaS
if ((r - mid) > THRESHOLD) %JtbRs(~q
mergeSort(data, temp, mid + 1, r); hrbo:8SL
else Ow3P-UzU3
insertSort(data, mid + 1, r - mid); p,F^0OU2}:
9IA$z\<<w
for (i = l; i <= mid; i++) { K%MW6y
temp = data; cq*=|m0}Z
} nU(DYHc+l
for (j = 1; j <= r - mid; j++) { I^D0<lHl~
temp[r - j + 1] = data[j + mid]; h>alGLN>
} 1G;8MPU
int a = temp[l]; JWROYED
int b = temp[r]; XF|WCZUnY%
for (i = l, j = r, k = l; k <= r; k++) { Q.+|xwz
if (a < b) { l?/Y
data[k] = temp[i++]; !Vheq3"q/
a = temp; RW_q~bA9
} else { 1S0pd-i
data[k] = temp[j--]; 4,G w#@
b = temp[j]; |ETiLR=&
} n-o3
} DdSSd@,x*
} |9Yi7.
`Gd$:qV
/** !g>.i`
* @param data ]u#JuX
* @param l &.Q8Mi aT
* @param i ymWgf6r<
*/ ;;Ds
private void insertSort(int[] data, int start, int len) { &3Z?UhH
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <*|?x86~
} #`;/KNp 9
} WZZ4]cC
} 1zftrX~v!X
} ~9=aT1S|
w8iR|TV
堆排序： @*MC/fe
|>2FRPK
package org.rut.util.algorithm.support; %+-C3\'
{f/]5x(_
import org.rut.util.algorithm.SortUtil; w~Ff%p@9
5Y\!pf7SQ|
/** f[sF:f(zI
* @author treeroot DNkWOY#{
* @since 2006-2-2 eKN$jlg
* @version 1.0 >u0w.3r#
*/ 4v'A\~ZU
public class HeapSort implements SortUtil.Sort{ ^V3v{>D>
pFsc}R/0/8
/* (non-Javadoc) ir16
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }LP!)|E
*/ zf[`~g
public void sort(int[] data) { 8FkFM^\1L
MaxHeap h=new MaxHeap(); a%BeqSZh
h.init(data); -n5 B)uw=
for(int i=0;i h.remove(); }-@4vl x$
System.arraycopy(h.queue,1,data,0,data.length); ' GG=Ebt
} G{9X)|d
l4y{m#/
private static class MaxHeap{ !@A#=(4R4
fP HLXg5s
void init(int[] data){ %ZP+zhn}
this.queue=new int[data.length+1]; QHt4",Ij
for(int i=0;i queue[++size]=data; `^9(Ot $
fixUp(size); _qXa=|}V.
} xJs;v
} 3WY$WRv
2F`cv1M
private int size=0; FG@-bV
!xIm2+:(
private int[] queue; ;8{cA_&
]i*](UQ
public int get() { ,`A?!.K$
return queue[1]; " =] -%B
} QK`i%TXJ
sJ z@7.
public void remove() { wJ<Oo@snm
SortUtil.swap(queue,1,size--); h*B|fy4K9U
fixDown(1); !ZRs;UZ>o
} o>/O++7Ra
file://fixdown c`*TPqw(B[
private void fixDown(int k) { ,m=4@ofX
int j; -fI@])$9J
while ((j = k << 1) <= size) { j2l55@
if (j < size %26amp;%26amp; queue[j] j++; <M]h{BS=
if (queue[k]>queue[j]) file://不用交换 ra N)8w}-
break; qmy%J
SortUtil.swap(queue,j,k); 1xE]6he4{T
k = j; Mg,:UC:
} +;}#B~:
} L I>(RMv
private void fixUp(int k) { %ir:ASk
while (k > 1) { Va VN
int j = k >> 1; in`aGFQO
if (queue[j]>queue[k]) &sXRN&Fp
break; <#GB[kQa
SortUtil.swap(queue,j,k); gb=/#G0R
k = j; 6 15s5ZA
} ] b9-k
} -u!FOD/
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} 2lKV#9"
?E%ELs_Dl
} R"MRnr_4K
iJ' xh n
SortUtil： "1`Oh<={b
ph>7?3;t
package org.rut.util.algorithm; .`<@m]m-
SUKxkc(
import org.rut.util.algorithm.support.BubbleSort; qn1255fB
import org.rut.util.algorithm.support.HeapSort; 73#x|lY
import org.rut.util.algorithm.support.ImprovedMergeSort; [YrHA~=U
import org.rut.util.algorithm.support.ImprovedQuickSort; %1 vsN-O}8
import org.rut.util.algorithm.support.InsertSort; C;QAT
import org.rut.util.algorithm.support.MergeSort; [%Bf< J<
import org.rut.util.algorithm.support.QuickSort; bwM@/g%DL
import org.rut.util.algorithm.support.SelectionSort; !o=U19)
import org.rut.util.algorithm.support.ShellSort; <s5qy-
5]I|DHmu
/** zk*c)s
* @author treeroot ##Q/I|
* @since 2006-2-2 [.hyZ}B
* @version 1.0 h_1T,f(
*/ c gzwx
public class SortUtil { G0u LmW70
public final static int INSERT = 1; hQ6a~?f
public final static int BUBBLE = 2; .h&k jD
public final static int SELECTION = 3; ;$Y4xM`=m
public final static int SHELL = 4; ")O`mXg-
public final static int QUICK = 5; VhjM>(
public final static int IMPROVED_QUICK = 6; joKIrS0y
public final static int MERGE = 7; Uw,2}yR
public final static int IMPROVED_MERGE = 8; a22Mufl
public final static int HEAP = 9; r78TE@d
P0H6mn*
public static void sort(int[] data) { wn_b[tdxq
sort(data, IMPROVED_QUICK); x8\A<(G_M=
} PHA-9\jC{
private static String[] name={ oI)GKA_Ng7
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?Kvl!F!`
}; ae:zWk'!
}ENR{vz$A
private static Sort[] impl=new Sort[]{ Q#h 9n]5
new InsertSort(), &B! o,qp
new BubbleSort(), +w@M~?>
new SelectionSort(), 2C{H$ A,pW
new ShellSort(), U9D!GKVp
new QuickSort(), ?(*t@ {k
new ImprovedQuickSort(), E*L iM5+I
new MergeSort(), "&+"@<
new ImprovedMergeSort(), R4ht6Vm3g)
new HeapSort() n,$IfC"
}; [=B$5%A
V $z} K
public static String toString(int algorithm){ =@k%&* Y?
return name[algorithm-1]; 3^s/bm$g
} Bs?7:kN(
1]orUF&_
public static void sort(int[] data, int algorithm) { 54 >-
impl[algorithm-1].sort(data); 7jnIv];i
} %dQxJMwj
L?5Ck<!xG
public static interface Sort { hx/N1x
public void sort(int[] data); >pU:Gr
} s w39\urf
>``MR%E:<
public static void swap(int[] data, int i, int j) { ~QvqG{bFB
int temp = data; "\0v,!@
data = data[j]; 6#IU*
data[j] = temp; /axIIfx-
} ui(^k $
} 0b4R