[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; cx,+k]9D
} 39c2pV[
int i1=l; g_E$=j92v
int i2=mid+1; ?PLPf>e
for(int cur=l;cur<=r;cur++){ P-[-pi@
if(i1==mid+1) I]|Pq
data[cur]=temp[i2++]; oE@a'*.\
else if(i2>r) &md`$a/
data[cur]=temp[i1++]; OHN_
else if(temp[i1] data[cur]=temp[i1++]; RIR\']WN
else x%=si[P
data[cur]=temp[i2++]; q$L%36u~/
} '$Dn
} 2B1q*`6R
P.se'z)E
} 85= )lu
rCEyQ)R_}
改进后的归并排序: !"AvY y9
m~BAyk^jo3
package org.rut.util.algorithm.support; F-QzrquS
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import org.rut.util.algorithm.SortUtil; 8bGd} (
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/** thh.A
* @author treeroot Ha#=(9.
* @since 2006-2-2 Ng&%o
* @version 1.0 ejKucEgD
*/ ,i NXK
public class ImprovedMergeSort implements SortUtil.Sort { @)F)S7
eSn+B;
private static final int THRESHOLD = 10; 1y&\5kB
@3i\%R)n;
/* bG"~"ipn%
* (non-Javadoc) +.8 \p5
* >tS'Q`R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d7^}tM
*/ E)&I@m
public void sort(int[] data) { iO{hA
int[] temp=new int[data.length]; 'ycJMYP8
mergeSort(data,temp,0,data.length-1); 9yu\ Ot
} ,u=`uD
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private void mergeSort(int[] data, int[] temp, int l, int r) { r+!YIk
int i, j, k; \<h0Q,e
int mid = (l + r) / 2; gk4;>}
if (l == r) Z3e| UAif
return; 8LJ8 }%*
if ((mid - l) >= THRESHOLD) &,vcJ{.
mergeSort(data, temp, l, mid); ,oe <
else J-:.FKf\5l
insertSort(data, l, mid - l + 1); T wB}l
if ((r - mid) > THRESHOLD) nUr5Qn?
mergeSort(data, temp, mid + 1, r); 8$cLG*=h4
else CZe ]kXNv
insertSort(data, mid + 1, r - mid); .~db4d]
KM0ru
for (i = l; i <= mid; i++) { X56q-|
temp = data; wo}H'Q}Hj
} }v;V=%N+v
for (j = 1; j <= r - mid; j++) { ~Gp[_ %K
temp[r - j + 1] = data[j + mid]; .<?GS{6 N
} UXz<)RvB
int a = temp[l]; Mexk~zA^
int b = temp[r]; ;a!S!%.h
for (i = l, j = r, k = l; k <= r; k++) { Rh2+=N<X
if (a < b) { OKZV{Gja
data[k] = temp[i++]; PNhe
a = temp; A|[?#S((]
} else { @u+]aI!`-
data[k] = temp[j--]; fb7;|LF
b = temp[j]; lBE=(A`
} Kg*Q
} eIF5ZPSZi
} ?,Xw[pR
;O5zUl-`
/** Ty\R=y}}
* @param data ;C#F>SG\S
* @param l HWAdhDZ
* @param i ,pfG
*/ M^Yh|%M
private void insertSort(int[] data, int start, int len) { ja'T+!k
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); CkC^'V)
} uc{Ihw
} g/_5unI}u
} !TH) +zi
} Kn{4;Xk\
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堆排序： \\ij(>CI
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package org.rut.util.algorithm.support; Ny7S
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import org.rut.util.algorithm.SortUtil; /<k/7TF`
(/YHk`v2
/** <nf@U>wlw
* @author treeroot ]mq|w
* @since 2006-2-2 m~ABC#,2
* @version 1.0 -IudgO]
*/ qo~O|~
public class HeapSort implements SortUtil.Sort{ EWt[z.`T1
//MUeTxR
/* (non-Javadoc) **0~K";\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) sdrfsrNvB-
*/ %0?KMRr
public void sort(int[] data) { 3*bU6$|5FP
MaxHeap h=new MaxHeap(); qZh/IW
h.init(data); aK~8B_5k8
for(int i=0;i h.remove(); 8`{:MkXP
System.arraycopy(h.queue,1,data,0,data.length); (m}'4et~L
} :kV#y
}#+^{P3;
private static class MaxHeap{ }&D WaO]J7
kazzVK5x
void init(int[] data){ 0> E r=,e
this.queue=new int[data.length+1]; rXq.DvQ
for(int i=0;i queue[++size]=data; c#]4awHU
fixUp(size); 3`?7<YJ
} T<>,lQs(a
} qkqIV^*R
Q\vpqE!9
private int size=0; zI uJ-8T"
1H`,WQ1mG
private int[] queue; =I5>$}q_&,
(L:>\m&NO
public int get() { n&/ `
return queue[1]; DfD&)tsMQ
} N>1em!AS
Oo~; L,
public void remove() { H41?/U,{
SortUtil.swap(queue,1,size--); 6_;icpN]
fixDown(1); MchA{p&Ol
} hZ,_6mNg
file://fixdown I 34>X`[o
private void fixDown(int k) { a-tmq]]E
int j; |-ALklXr
while ((j = k << 1) <= size) { Rv>-4@fMJ
if (j < size %26amp;%26amp; queue[j] j++; t}4,]ms
if (queue[k]>queue[j]) file://不用交换 W@IQ^ }E
break; ,qwuLBW
SortUtil.swap(queue,j,k); Dy&i&5E.-l
k = j; =svN#q5s
} lVa%$F{Pq
} j;r-NCBnz
private void fixUp(int k) { {Xy5pfW Q
while (k > 1) { JR|ck=tq
int j = k >> 1; >y>5#[M!
if (queue[j]>queue[k]) r;2^#6/Z
break; .Hm>i
SortUtil.swap(queue,j,k); >:!5*E5?
k = j; _f,C[C[e&
} ({_{\9O,3
} 6@!`]tSCK
T>Z<]s
} 0mVNQxHI
|r/" |`
} V0YZp
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SortUtil： H?Wya.7
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package org.rut.util.algorithm; [|L<_.8
B6 ;|f'e!
import org.rut.util.algorithm.support.BubbleSort; q2j{tP#
import org.rut.util.algorithm.support.HeapSort; z<;HQX,
import org.rut.util.algorithm.support.ImprovedMergeSort; Or+U@vAnk
import org.rut.util.algorithm.support.ImprovedQuickSort; Fm 2AEs\
import org.rut.util.algorithm.support.InsertSort; +sA2WK]
import org.rut.util.algorithm.support.MergeSort; |df Pki{
import org.rut.util.algorithm.support.QuickSort; xo&_bMO
import org.rut.util.algorithm.support.SelectionSort; mJnIwdW*
import org.rut.util.algorithm.support.ShellSort; BxmWIItz
*&W"bOMH*
/** `wVyb>T
* @author treeroot `h\j99
* @since 2006-2-2 J@'wf8Ub
* @version 1.0 SfyQ$$Z
*/ CRE3icXbQ
public class SortUtil { 'H!Uh]!
public final static int INSERT = 1; BU_nh+dF
public final static int BUBBLE = 2; am'7uy!ka~
public final static int SELECTION = 3; kzLsoZ!I
public final static int SHELL = 4; X_h}J=33Q
public final static int QUICK = 5; cT,sh~-x,
public final static int IMPROVED_QUICK = 6; bE..P&"
public final static int MERGE = 7; 4$<JHo @.
public final static int IMPROVED_MERGE = 8; cq]6XK-W
public final static int HEAP = 9; ~ 7s!VR
q9_OGd|P
public static void sort(int[] data) { * u>\57W
sort(data, IMPROVED_QUICK); o.!Dq7R
} M }D}K\)
private static String[] name={ 2ilQXy
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" vE?G7%,
}; HV|,}Wks6s
r19 pZAc
private static Sort[] impl=new Sort[]{ X"Swi&4
new InsertSort(), n>YKa)|W`
new BubbleSort(), NLqzi%s
new SelectionSort(), a=2%4Wmz
new ShellSort(), CdQ!GS<'y
new QuickSort(), t{96p77)=
new ImprovedQuickSort(), +<C!U'
new MergeSort(), K%oG,-wdg
new ImprovedMergeSort(), D,feF9
new HeapSort() ,qxu|9L
}; bn5 Su=]
25?6gu*Z
public static String toString(int algorithm){ ~>|ziHx
return name[algorithm-1]; .q>iXE_c
} Lf&kv7Wj
bAMdI 5Zk?
public static void sort(int[] data, int algorithm) { +e``OeXog
impl[algorithm-1].sort(data); L0o\J` :
} GTd,n=
.k !{*
public static interface Sort { {wKB;?fUvk
public void sort(int[] data); {<KVx9
} ?caSb=f
[W&T(%(W-
public static void swap(int[] data, int i, int j) { S9.o/mr
int temp = data; 77Dn97l)&
data = data[j]; 7@Qcc t4A
data[j] = temp; ZECfR>`x
} e^voW"?%
} <5051UEu