[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; 7bgnZ]r8t
} .Ws iOJU
int i1=l; *6 I =oE
int i2=mid+1; D)H?=G
for(int cur=l;cur<=r;cur++){ +Fu@I{"A
if(i1==mid+1) ]%NO"HzF~
data[cur]=temp[i2++]; NYSj^k;^(z
else if(i2>r) -IpV'%nX;
data[cur]=temp[i1++]; IgzCh
else if(temp[i1] data[cur]=temp[i1++]; sDzD 8as
else W _PM!>8`
data[cur]=temp[i2++]; _9}x2uO~
} o1fyNzq<
} #U?EOm
qP7&LtU
} }vXA`)Ns
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改进后的归并排序: N:UDbLjw~
ROJ'-Vde9
package org.rut.util.algorithm.support; y9V;IXhDc
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import org.rut.util.algorithm.SortUtil; e.3sAUHZ-
5~`|)~FA
/** ~)!V8
* @author treeroot $Nt=gSWw5
* @since 2006-2-2 #Qtg\X
* @version 1.0 +Op%,,Db
*/ >)AE|j`
public class ImprovedMergeSort implements SortUtil.Sort { Z-? Iip{
ZaukMEq
private static final int THRESHOLD = 10; vWnHC
vOvxQS}dBp
/* tj"v0u?zW
* (non-Javadoc) u7WTSL%
* HKEop
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !#@4xeBPo
*/ Mm>zpB`qP
public void sort(int[] data) { 3/A[LL|
int[] temp=new int[data.length]; 6k@%+<1
mergeSort(data,temp,0,data.length-1); T!=20!I
} ZbZAx:L
S`GXiwk
private void mergeSort(int[] data, int[] temp, int l, int r) { C$AIP\j- )
int i, j, k; Hnd9T(UB
int mid = (l + r) / 2; )|{1&F1
if (l == r) UtW"U0A
return; i(&6ys5
if ((mid - l) >= THRESHOLD) 'y+bx?3Z
mergeSort(data, temp, l, mid); p5twL
else x8SM,2ud
insertSort(data, l, mid - l + 1); 6KIjq[T^
if ((r - mid) > THRESHOLD) *uI hxMX
mergeSort(data, temp, mid + 1, r); \Age9iz&
else :o.x=c B
insertSort(data, mid + 1, r - mid); <6}f2^
c]g<XVI
for (i = l; i <= mid; i++) { >'2w\Uk~:
temp = data; UgnsV*e&
} /QV. U.>G
for (j = 1; j <= r - mid; j++) { SBN_>;$c5}
temp[r - j + 1] = data[j + mid]; Dj,+t+|
} &G7)s%q
int a = temp[l]; w{:Oa7_A
int b = temp[r]; XoH[MJC
for (i = l, j = r, k = l; k <= r; k++) { *Lb(urf
if (a < b) { 0?5%
data[k] = temp[i++]; Fl#VKU3h
a = temp; ERX|cc
} else { !5E%W[
data[k] = temp[j--]; 'sjJSc
b = temp[j]; =7J|KoKK
} :C|>y4U&(s
} g'}`FvADi
} u]]5p[|S
[)J49
/** #g-*n@ 1
* @param data L?D~~Jb
* @param l iZkW+5(
* @param i ;)=zvr17
*/ |4p<T!T
private void insertSort(int[] data, int start, int len) { )/+eLRN5G
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @KXz4PU
} 08K.\3
} 3@Zz-~4Td
} V'.eesN
} bWC~Hv
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堆排序： jy__Y=1}
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package org.rut.util.algorithm.support; ;@7#w
p^zEfLTU
import org.rut.util.algorithm.SortUtil; d_WnK{
Wf`OyeRz
/** LO$#DHPt
* @author treeroot Q:fUM[
* @since 2006-2-2 YP\4XI
* @version 1.0 Xb+if
*/ q/w6sQx$
public class HeapSort implements SortUtil.Sort{ T`w};]z^d2
*09\\ G
/* (non-Javadoc) qK6 uU9z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 32-3C6f@oZ
*/ bKt3x+x(
public void sort(int[] data) { vVAZSR#
MaxHeap h=new MaxHeap(); xeP;"J}
h.init(data); u>Axq3F
for(int i=0;i h.remove(); QkCoW[sn
System.arraycopy(h.queue,1,data,0,data.length); *p#YK|
} XvzV lKL
?/l}(t$H
private static class MaxHeap{ iz GaV[
<rwOI.W l$
void init(int[] data){ ;5oH6{7_Z
this.queue=new int[data.length+1]; dV2b)p4J
for(int i=0;i queue[++size]=data; EhP&L?EL
fixUp(size); Bn#HJ17/#
} ]N(zom_0d
} aIt 0;D
k0e|8g X
private int size=0; #Mem2cz
1:{O RX[;
private int[] queue; jXDzjt94J
"$:y03V
public int get() { /?dQUu^z
return queue[1]; RY/ Z~]
} AFm*60C
BE2\?q-
public void remove() { LN6JH!
SortUtil.swap(queue,1,size--); x]d"|jmVZ
fixDown(1); VGDEP!)-8
} z5*O@_r+.b
file://fixdown D16;6K'{
private void fixDown(int k) { e~ 78'UH
int j; n%ArA])_&
while ((j = k << 1) <= size) { Y'a(J7
if (j < size %26amp;%26amp; queue[j] j++; O*n%2Mam
if (queue[k]>queue[j]) file://不用交换 p2NB~t7Z
break; X8l1xD
SortUtil.swap(queue,j,k); J>|:T
k = j; f?<M3P
} $E~Lu$|
} CL}I:/zRB
private void fixUp(int k) { n$![b_)*
while (k > 1) { DwrCysIK
int j = k >> 1; 'm!11Phe
if (queue[j]>queue[k]) x]J-q5
break; WlLZtgq
SortUtil.swap(queue,j,k); lSbM)gL
k = j; zQ|x>3
} U/&qV"Ih
} VQNH@g^gqr
]zMBZs
} }?qnwx.
.HyiPx3^
} O7CYpn4<7
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SortUtil： UUEDCtF)
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package org.rut.util.algorithm; 6exlb:
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import org.rut.util.algorithm.support.BubbleSort; 0_zSQn9c
import org.rut.util.algorithm.support.HeapSort; AA& dZjz
import org.rut.util.algorithm.support.ImprovedMergeSort; MLIQ 8=
import org.rut.util.algorithm.support.ImprovedQuickSort; ?QIQ,?.
import org.rut.util.algorithm.support.InsertSort; <sFf'W_3{
import org.rut.util.algorithm.support.MergeSort; yExyx?j.
import org.rut.util.algorithm.support.QuickSort; m}'@S+k^
import org.rut.util.algorithm.support.SelectionSort; Rw=E_q{
import org.rut.util.algorithm.support.ShellSort; ,G/X"t ~
'nDT.i
/** I/-w65J]
* @author treeroot CY).I`aJ
* @since 2006-2-2 r`g;k&"a
* @version 1.0 z4fK{S
*/ ]:#$6D"
public class SortUtil { ds[Z=_Ll
public final static int INSERT = 1; kuud0VWJ
public final static int BUBBLE = 2; adE0oXQH"
public final static int SELECTION = 3; IlL
public final static int SHELL = 4; .&Gtw _
public final static int QUICK = 5; qmyZbo|8&
public final static int IMPROVED_QUICK = 6; 9a Ps_|C
public final static int MERGE = 7; !skWe~/
public final static int IMPROVED_MERGE = 8; +~k,4
public final static int HEAP = 9; ziGL4c0p
l45F*v]^
public static void sort(int[] data) { i&Cqw~.H
sort(data, IMPROVED_QUICK); tJ_@AcF
} n$0)gKN7
private static String[] name={ z'K7J'(R
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" G}xBYc0b
}; N)y;owgo
l YA+k5
private static Sort[] impl=new Sort[]{ %|* y/m
new InsertSort(), #YVDOR{z
new BubbleSort(), 1;[ <||K
new SelectionSort(), '0M0F'R
new ShellSort(), juYt =
new QuickSort(), v=WDs#"
new ImprovedQuickSort(), M_ cb(=ey
new MergeSort(), `l0icfy
new ImprovedMergeSort(), GeTCN
new HeapSort() +hhbp'%
}; I%*Zj,>
IX3yNTW"L
public static String toString(int algorithm){ ][qA@3^Tw
return name[algorithm-1]; 2m}]z.w#
} JJOs L!@
2-2LmxLG
public static void sort(int[] data, int algorithm) { 3lgyX/?o
impl[algorithm-1].sort(data); h4xdE0
} 62'0)Cy^
J@{Bv%
public static interface Sort { (8F?yBu
public void sort(int[] data); s_?*R
} ,qh
+mPB?5
public static void swap(int[] data, int i, int j) { }slEkpk?]
int temp = data; '~=xP
data = data[j]; ky"7 ^
data[j] = temp; fb=vO U
} l{{ #tW
} X KeK;+