[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; {{C`mgC
} 7VK}Dy/Vvn
int i1=l; bslrqUk_`=
int i2=mid+1; k`".
for(int cur=l;cur<=r;cur++){ "uLjIIl
if(i1==mid+1) 5>6PH+Oq
data[cur]=temp[i2++]; B= keBO](@
else if(i2>r) k%[3Q>5iM
data[cur]=temp[i1++]; (wc03,K^
else if(temp[i1] data[cur]=temp[i1++]; E&yD8=vw
else >hY" 3
data[cur]=temp[i2++]; _WX#a|4h{
} TwyM\9l7
} Z%Z9oJ:
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} I *c;H I
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改进后的归并排序: gBu1QviU
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package org.rut.util.algorithm.support; 5q@LxDy,b
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import org.rut.util.algorithm.SortUtil; P#v*TD'
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/** $-+/$!
* @author treeroot Ba\6?K
* @since 2006-2-2 Qy#)Gxp
* @version 1.0 K}[>T(0E
*/ pIWI
public class ImprovedMergeSort implements SortUtil.Sort { UDf9FnG}L
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private static final int THRESHOLD = 10; _DRrznaw
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/* ry};m_BY
* (non-Javadoc) >Ps7I
* 4eVI},
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _Fp>F
*/ dQy>Nmfy
public void sort(int[] data) { Hy{ Q#fq
int[] temp=new int[data.length]; g.%
mergeSort(data,temp,0,data.length-1); T0j2a&Pv
} %;`>`j5
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private void mergeSort(int[] data, int[] temp, int l, int r) { m$>iS@R
int i, j, k; 1;u4X`8
int mid = (l + r) / 2; v4?iOD
if (l == r) lD;'tqaC
return; x)5V.q
if ((mid - l) >= THRESHOLD) BpAB5=M0
mergeSort(data, temp, l, mid); =4C}{IL
else )J/HkOj"V
insertSort(data, l, mid - l + 1); gLj?Ys
if ((r - mid) > THRESHOLD) @^nu#R
mergeSort(data, temp, mid + 1, r); (g/7yO(s
else ~QG?k
insertSort(data, mid + 1, r - mid); U`R;P-
pLoy
for (i = l; i <= mid; i++) { <v]9lw'
temp = data; #/J 'P[z
} ^.X[)U
for (j = 1; j <= r - mid; j++) { J$uM 03
temp[r - j + 1] = data[j + mid]; SVP:D3)
} #,f{Ok+
int a = temp[l]; H;_yRUY9
int b = temp[r]; {'3D1#SK
for (i = l, j = r, k = l; k <= r; k++) { Uku5wPS
if (a < b) { ayp b
data[k] = temp[i++]; \,W.0#D8v4
a = temp; &TN2 HZ-bJ
} else { $7gB_o$zz
data[k] = temp[j--]; H;vZm[\0N-
b = temp[j]; HR{s&ho
} ^^LjI
} %&] 1FhL
} vgPUIxB@
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/** B#N7qoi
* @param data NXoK@Y
* @param l >Gd.&flSj
* @param i _,;%mK
*/ 1 tfYsg=O
private void insertSort(int[] data, int start, int len) { wz#[:2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [STje8+V
} =t+('
} ,7/ _T\d<
} *re 44
} T&}Ye\%
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堆排序： N=fz/CD)I
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package org.rut.util.algorithm.support; =y;@?=T
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import org.rut.util.algorithm.SortUtil; 7>je6*(K
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/** rc~Y=m
* @author treeroot ;~ee[W$1
* @since 2006-2-2 (&Q)EBdm
* @version 1.0 +{>.Sk'$
*/ !A-;NGxE
public class HeapSort implements SortUtil.Sort{ [}k|
TNsg pJ?\
/* (non-Javadoc) lZ a?Y@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pGk"3.ce
*/ u[[/w&UV.,
public void sort(int[] data) { 03"#J2b
MaxHeap h=new MaxHeap(); .CmL7 5
h.init(data); 5`yPT>*#m>
for(int i=0;i h.remove(); S-,kI
System.arraycopy(h.queue,1,data,0,data.length); R<j<.h
} ScHlfk p
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private static class MaxHeap{ >C^/,/%v
rG5i-'
void init(int[] data){ ?1DUNZ6
this.queue=new int[data.length+1]; E 8^sy*f
for(int i=0;i queue[++size]=data; mS7E_A8
fixUp(size); z (#Xca
} EFNdiv$wF
} e@+v9Bs]q
]TfeBX6ST
private int size=0; g1dmkX
<[FS%2,0mb
private int[] queue; 5~-}}F
* S{\#s
public int get() { `x< 0A
return queue[1]; 5 2fO)!
} 3:"AFV
S#hu2\9D,
public void remove() { 3liq9P_
SortUtil.swap(queue,1,size--); %N1T{
fixDown(1); !yk7HaP
} |oFI[PE
file://fixdown 8|Q4-VK<!
private void fixDown(int k) { d)9PEtI
int j; B ;;cbY
while ((j = k << 1) <= size) { Do(PdF6A
if (j < size %26amp;%26amp; queue[j] j++; +:b(%|
if (queue[k]>queue[j]) file://不用交换 I(y`)$}
break; >Ziy1Dp
SortUtil.swap(queue,j,k); =^ gvZ|]
k = j; i"KL;t[1
} (kdC1,E
} JJ)y2
private void fixUp(int k) { i{4'cdr?
while (k > 1) { ./2Z?,
int j = k >> 1; XZ!cW=bqS
if (queue[j]>queue[k]) N.k+AQb
break; \}n !yYh(
SortUtil.swap(queue,j,k); -.^=Z!=M
k = j; yr (g~MQ
} 4$qNcMdz
} $)4GCP
)|MIWgfWN
} ;}n|,g>
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} Cbazwq
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SortUtil： sf<Q#ieTxY
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package org.rut.util.algorithm; Bd/} %4V\@
i=x.tsJ:hB
import org.rut.util.algorithm.support.BubbleSort; ?hP<@L6K
import org.rut.util.algorithm.support.HeapSort; \IO$+Guh
import org.rut.util.algorithm.support.ImprovedMergeSort; {c&qB`y<.
import org.rut.util.algorithm.support.ImprovedQuickSort; 5F% h>tqh
import org.rut.util.algorithm.support.InsertSort; jM{(8aUG
import org.rut.util.algorithm.support.MergeSort; ^n6)YX
import org.rut.util.algorithm.support.QuickSort; |C&%S"*+D
import org.rut.util.algorithm.support.SelectionSort; U#OWUZ
import org.rut.util.algorithm.support.ShellSort; ,s\x]bh
Qo]vpp^[#
/** Xv`2hf
* @author treeroot XPGL3[w\V
* @since 2006-2-2 0EcC
* @version 1.0 t$ACQ*O
*/ tCd{G c
public class SortUtil { 5@GD} oAn6
public final static int INSERT = 1; 3w[<cq.!
public final static int BUBBLE = 2; wpAw/-/
public final static int SELECTION = 3; LuQ"E4;nY%
public final static int SHELL = 4; pE$|2v
public final static int QUICK = 5; >_|Z{:z]d.
public final static int IMPROVED_QUICK = 6; :|*Gnu
public final static int MERGE = 7; /8 e2dw: \
public final static int IMPROVED_MERGE = 8; s ZlJ/_g
public final static int HEAP = 9; OHx,*}N
/&S~+~]n
public static void sort(int[] data) { fho=<|-
sort(data, IMPROVED_QUICK); } IIK~d,
} ,eZ;8W{G
private static String[] name={ m~Kch~~]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" hr)+Pk
}; BG(R=, 7
~.\73_M=A
private static Sort[] impl=new Sort[]{ jh<TdvF2$
new InsertSort(), ,6S_&<{
new BubbleSort(), o|zrD~&$
new SelectionSort(), _"R3N
new ShellSort(), 7,) 67G;
new QuickSort(), )*psDjZ7*
new ImprovedQuickSort(), P5yJO97
new MergeSort(), Bt|9%o06l
new ImprovedMergeSort(), 4GMa5]Ft
new HeapSort() 0A#9C09
}; tdMP,0u
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public static String toString(int algorithm){ xI.Orpw
return name[algorithm-1]; 4?P%M"\Iv
} Fi?U)T+%+
i?1js! 8
public static void sort(int[] data, int algorithm) { qK9L+i
impl[algorithm-1].sort(data); j`[yoAH
} kR`6s
D:ql^{~
public static interface Sort { -dc"N|.
public void sort(int[] data); lOWB^uS%
} c<JM1
KZp,=[t
public static void swap(int[] data, int i, int j) { XwKZv0ub
int temp = data; kuKnJWv
data = data[j]; 5WtQwN~
data[j] = temp; (R;) 9I\
} {UV<=R,E
} Lic{'w&