[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; 9<Ag1l
} {g@A>
int i1=l; C2.W[T
int i2=mid+1; ITQ9(W Un
for(int cur=l;cur<=r;cur++){ kYtHX~@
if(i1==mid+1) 25&nwz
data[cur]=temp[i2++]; -$m@*L
else if(i2>r) g z`*|h
data[cur]=temp[i1++]; z+Z%H#9e
else if(temp[i1] data[cur]=temp[i1++]; pj@Yqg/
else w5Z2N[hy
data[cur]=temp[i2++]; khS/'b
} /x O{ .dr
} bN!u}DnN
p_gA/. v=
} 4JSZ0:O
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改进后的归并排序: )^(P@D.L
6d};|#}
package org.rut.util.algorithm.support; 8.-S$^hj~6
nHVPMi>
import org.rut.util.algorithm.SortUtil; j`hNZ%a
? KF=W
/** ;x16shH
* @author treeroot !c."
* @since 2006-2-2 N+hedF@ZU
* @version 1.0 *LEu=3lp%>
*/ bkkSIl+Q
public class ImprovedMergeSort implements SortUtil.Sort { _y"a2M
p4y6R4kyT
private static final int THRESHOLD = 10; LhZZc`|7t
-B,cB
/* <oZ(ng@X
* (non-Javadoc) A$N+9n\
* IuDT=A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &p)@8HY
*/ iA&oLu[y3
public void sort(int[] data) { qz87iJp&
int[] temp=new int[data.length]; !6{Jq]
mergeSort(data,temp,0,data.length-1); )kF2HF
} B#Qpd7E+*
(< :mM
private void mergeSort(int[] data, int[] temp, int l, int r) { Z$1.^H.Db
int i, j, k; s9G)Bd 8
int mid = (l + r) / 2; oFb\TiLu
if (l == r) &b!vWX1N
return; Mc!2mE%47m
if ((mid - l) >= THRESHOLD) ),MU+*`
mergeSort(data, temp, l, mid); 9n-T5WP
else tz"5+uuu
insertSort(data, l, mid - l + 1); (;C$gnr.C
if ((r - mid) > THRESHOLD) 2c"/QT
mergeSort(data, temp, mid + 1, r); A0UV+ -PP
else 5d%_Wb'
insertSort(data, mid + 1, r - mid); 8B_0!U&]
"wC0eDf
for (i = l; i <= mid; i++) { [#7D~Lx/
temp = data; IL2e6b
} i]LU4y%'
for (j = 1; j <= r - mid; j++) { XNKtL]U}$
temp[r - j + 1] = data[j + mid]; g(KK9Unu
} n}VbdxlN
int a = temp[l]; %-\FVKX
int b = temp[r]; Y'2-yB
for (i = l, j = r, k = l; k <= r; k++) { F9F" F
if (a < b) { )CFk`57U
data[k] = temp[i++]; +jv}\Jt
a = temp; G2=F8kL
} else { PIgGXNo
data[k] = temp[j--]; 3,%nkW
b = temp[j]; 9)jo7,VM
} @>+^W&
} .zQ4/
} YfV"_G.ad|
=jsx(3V
/** ZUv ZNf
* @param data =kwb` Z/a
* @param l 7Y%!,ff
* @param i 3L?WTS6(u
*/ H U:1f)aa
private void insertSort(int[] data, int start, int len) { '_k>*trV
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ful]OLV+
} H]Y#pLu|
} \)uy"+ Z`
} |GJBwrL^0
} 7zOhyl?
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堆排序： ,\BfmC_i
2;dM:FHLhO
package org.rut.util.algorithm.support; 0T7M_G'5Q
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import org.rut.util.algorithm.SortUtil; 0@o;|N"i
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/** MP6 \r
* @author treeroot @=02
* @since 2006-2-2 yBr$ 0$
* @version 1.0 Q~x*bMb.
*/ j@%K*Gb`
public class HeapSort implements SortUtil.Sort{ >|v=Ba6R0
p Z0=
/* (non-Javadoc) t^`<*H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ] dW%g?
*/ RmcYaj^=
public void sort(int[] data) { kqjxJ5
MaxHeap h=new MaxHeap(); sx<} tbG
h.init(data); H4P\hOK7r
for(int i=0;i h.remove(); z:dXc
System.arraycopy(h.queue,1,data,0,data.length); }K#iCby4
} Vww@eK%5Q
;+S2h-4
private static class MaxHeap{ plzE
pA*D/P-
void init(int[] data){ zfk'>_'
this.queue=new int[data.length+1]; =4YbVA+(
for(int i=0;i queue[++size]=data; j:3A;r\
fixUp(size); _Cu[s?,kS
} OI)&vQ5k
} Q3 K;kS
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private int size=0; z44
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private int[] queue; ]s1TJw [B
:7HVBH
public int get() { U'JP1\
return queue[1]; ]hCWe0F
} QT7w::ht
[X0k{FR
public void remove() { uYG #c(lc
SortUtil.swap(queue,1,size--); )_Z]=5Ds
fixDown(1); BsoFQw4$9
} Y2RxD\!Z
file://fixdown 'DaNR`9
private void fixDown(int k) { WyKUvVi
int j; ucIVVT(u
while ((j = k << 1) <= size) { T{5M1r
if (j < size %26amp;%26amp; queue[j] j++; 31 KDeFg
if (queue[k]>queue[j]) file://不用交换 Ri^sQ<~(
break; nOA,x
SortUtil.swap(queue,j,k); ~$ cm9>
k = j; C=xo&I7
} A"P\4
} X=S}WKu
private void fixUp(int k) { )?= kb
while (k > 1) { ZwY`x')
int j = k >> 1; mSVX4XW<
if (queue[j]>queue[k]) `<]P"G
break; DzX6U[=
SortUtil.swap(queue,j,k); v.~Nv@+kR
k = j; jgZX~D
} D@/9+]-,
} E 6>1Fm8%V
g4BwKENM
} oT9XJwqnv
C9"f6>i
} UgOGBj,&5W
pn ~/!y
SortUtil： HQ-N!pf9
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package org.rut.util.algorithm; vZ1D3ytfG
$S"zxEJJ Y
import org.rut.util.algorithm.support.BubbleSort; HnH2u;
import org.rut.util.algorithm.support.HeapSort; BMtYM{S6
import org.rut.util.algorithm.support.ImprovedMergeSort; QrrZF.
import org.rut.util.algorithm.support.ImprovedQuickSort; OI;L9\MJc
import org.rut.util.algorithm.support.InsertSort; g%<{G/Tz
import org.rut.util.algorithm.support.MergeSort; D9@<#2-
import org.rut.util.algorithm.support.QuickSort; ~@a) E+LsF
import org.rut.util.algorithm.support.SelectionSort; W2X+NacD
import org.rut.util.algorithm.support.ShellSort; }[hDg6i
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/** AR[M8RA
* @author treeroot YV2pERl
* @since 2006-2-2 l:kE^=6
* @version 1.0 J\Oc]gi\L
*/ L@^!(
public class SortUtil { <9MQ
public final static int INSERT = 1; n]6w)wE(
public final static int BUBBLE = 2; gvwCoCbb
public final static int SELECTION = 3; %oSfL;W7
public final static int SHELL = 4; Q xj|lr
public final static int QUICK = 5; 6i?kkULBS
public final static int IMPROVED_QUICK = 6; `"bRjC"f]
public final static int MERGE = 7; .n^O)|Z
public final static int IMPROVED_MERGE = 8; `gA5P %
public final static int HEAP = 9; R,(+NT$
`qYc#_ELv
public static void sort(int[] data) { xr1I8 5kM
sort(data, IMPROVED_QUICK); 0lJBtk9wn
} N|^!"/
private static String[] name={ 5u=U--
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 1nX68fS.9
}; SquqaX+<
Z)Xq!]~/g
private static Sort[] impl=new Sort[]{ pqNoL* H
new InsertSort(), Di5Op(S((
new BubbleSort(), B=nx8s
new SelectionSort(), /fcwz5~
new ShellSort(), #!F8n`C-
new QuickSort(), s3fGX|;
new ImprovedQuickSort(), @%5F^Vbd
new MergeSort(), @)M.u3{\
new ImprovedMergeSort(), F0o18k_"
new HeapSort() `b,g2XA
}; G@l|u
aV0;WH_3
public static String toString(int algorithm){ v2dSC(hRZ
return name[algorithm-1]; H603L|4
} Q=9VuTE
EzY scX.[
public static void sort(int[] data, int algorithm) { E rRMiT
impl[algorithm-1].sort(data); ;tIIEc
} qgY(S}V
lf7H8k,-
public static interface Sort { rO2PbF3
public void sort(int[] data); fe]T9EDA
} ^dp[Z,[1z
Ni;{\"Gt
public static void swap(int[] data, int i, int j) { nqw*oLFQ
int temp = data; j(2tbWg9-
data = data[j]; )-6[Bw
data[j] = temp; 8i+jFSZ$
} C^ k3*N
} v(WL 3[y;