[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; \dm5Em/
} prHM}n{0
int i1=l; s+tPHftp
int i2=mid+1; Wq5}SM
for(int cur=l;cur<=r;cur++){ k? <.yr1
if(i1==mid+1) !lVOZ%
data[cur]=temp[i2++]; 'YKzs;y$
else if(i2>r) )x!b{5'"7
data[cur]=temp[i1++]; Xkqq$A4
else if(temp[i1] data[cur]=temp[i1++]; 86*9GS?U(
else PBeBI:
data[cur]=temp[i2++]; Su]@~^w
} sf([8YUd
} #r=Jc8J_
6'{/Ote
} D*%?0
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改进后的归并排序: 6`PQP;
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package org.rut.util.algorithm.support; 3`JLb]6
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import org.rut.util.algorithm.SortUtil; 0N|l1Sn
LD=eMk: ~
/** 5NR@<FE
* @author treeroot v)b_bU]Hx
* @since 2006-2-2 4.=jKj9j
* @version 1.0 ~'9\y"N1
*/ uc<JF=
public class ImprovedMergeSort implements SortUtil.Sort { kxanzsSr9
Y>/T+ub
private static final int THRESHOLD = 10; (-no`j
5}3#l/
/* L">\c5ca
* (non-Javadoc) rD\)ndPv
* fT2F$U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \,AE5hnO
*/ 3 T1,:r
public void sort(int[] data) { V0l"tr@
int[] temp=new int[data.length]; -;:.+1
mergeSort(data,temp,0,data.length-1); K7 J RCLA
} "1l$]=C*
Y&XO:jB
private void mergeSort(int[] data, int[] temp, int l, int r) { RoFOjCc>D.
int i, j, k; tEN8S]X
int mid = (l + r) / 2; 0!Vza?9
if (l == r) aw923wEi
return; ~n"?*I`
if ((mid - l) >= THRESHOLD) O"GuVC}B
mergeSort(data, temp, l, mid); Mp?Gi7o=
else :MP*Xy\7&J
insertSort(data, l, mid - l + 1); }Q?a6(4
if ((r - mid) > THRESHOLD) Ol sX
mergeSort(data, temp, mid + 1, r); [ *~2Ts
else Tc.QzD\
insertSort(data, mid + 1, r - mid); T4nWK!}z
d=p=eUd2
for (i = l; i <= mid; i++) { kz*6%Cg*~
temp = data; :O'QL,
} i'QR-B&Z
for (j = 1; j <= r - mid; j++) { `-!kqJ
temp[r - j + 1] = data[j + mid]; 3xz|d`A
} WM;5/;bB
int a = temp[l]; ]6 HR
int b = temp[r]; B'e@RhU;
for (i = l, j = r, k = l; k <= r; k++) { ;nx.:f
if (a < b) { Bp_8PjQ
data[k] = temp[i++]; OQIr"
a = temp; l>?f+70
} else { jqj4(J@%yr
data[k] = temp[j--]; rb*0YCi
b = temp[j]; >WA'/Sl<A<
} )<f4F!?,A
} ["#H/L]3
} -<ome~|
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/** O^!Bc}$
* @param data ~.4y* &
* @param l ~Zn|(
* @param i {;|pcx\L6~
*/ po(pi|
private void insertSort(int[] data, int start, int len) { Fi'ZId
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ilXKJJda
} O')=]6CQ*
} h;#046-7
} 5UJ ?1"J
} zBK"k]rz
}Q*J!OH
堆排序： LJ;&02w@
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package org.rut.util.algorithm.support; $@vB<(sk
P3IBi_YyG1
import org.rut.util.algorithm.SortUtil; ~ MsHV%
| TG6-e_
/** F!phTu
* @author treeroot j sD]v)LB
* @since 2006-2-2 C=(Q0-+L|
* @version 1.0 (?g+.]Dt,
*/ 4x<H=CJC
public class HeapSort implements SortUtil.Sort{ teI?.M9r
xC9{hXg!
/* (non-Javadoc) lU%oU&P/"S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1V9AnzwX
*/ MkHkM
public void sort(int[] data) { =)G]\W)m
MaxHeap h=new MaxHeap(); d#XgO5eyO
h.init(data); (7N!Jvg9
for(int i=0;i h.remove(); 7_P33l8y
System.arraycopy(h.queue,1,data,0,data.length); V']Z_$_
} :iLRCK3C
$)$r
private static class MaxHeap{ YK[2KTlo
0g6sGz=
void init(int[] data){ 2@lGY_O!m
this.queue=new int[data.length+1]; !H@HgJ -
for(int i=0;i queue[++size]=data; 9-V'U\}L
fixUp(size); x/CM)!U)
} |/H?\]7
} =.CiKV$E
fI`gF^u(
private int size=0; >e& L"
Sgv_YoD?-
private int[] queue; ^"p. 3Hy
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public int get() { N&p0Emg
return queue[1]; Hi=</ Wy;
} Ihf)gfHj
Su7N?X!
public void remove() { i!}6FBZ
SortUtil.swap(queue,1,size--); S<NK!89
fixDown(1); bEj}J_#
} P`{$7ST'Hh
file://fixdown J9!/C#Fm
private void fixDown(int k) { KpYezdPF)
int j; @XolFOL"f"
while ((j = k << 1) <= size) { `_1~[t
if (j < size %26amp;%26amp; queue[j] j++; CEI"p2
if (queue[k]>queue[j]) file://不用交换 h'};spv
break; B~ i
SortUtil.swap(queue,j,k); `7w-_o %
k = j; +a^gC
} I=#`8deH(
} z`t~N
private void fixUp(int k) { NJ.oME@=
while (k > 1) { ,8Po _[
int j = k >> 1; .l_Nf9=
if (queue[j]>queue[k]) p*,T~(A6
break; ssx#|InY
SortUtil.swap(queue,j,k); B7[d^Y60B
k = j; &nXE?-J
} ObEz0Rj
} z2t+1In,
hXth\e\[{`
} jzJTV4&zjs
mN}szW,
} {eI'0==
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SortUtil： r!dWI
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package org.rut.util.algorithm; {Ba&
y)&K9 I
import org.rut.util.algorithm.support.BubbleSort; X.;VZwT+
import org.rut.util.algorithm.support.HeapSort; C 5gdvJN
import org.rut.util.algorithm.support.ImprovedMergeSort; c/tB_]
import org.rut.util.algorithm.support.ImprovedQuickSort; hBpa"0F
import org.rut.util.algorithm.support.InsertSort; O#ZZ PJ"
import org.rut.util.algorithm.support.MergeSort; QHZ",1F
import org.rut.util.algorithm.support.QuickSort; o zn&>k
import org.rut.util.algorithm.support.SelectionSort; -grf7w^
import org.rut.util.algorithm.support.ShellSort; Y2QX<
zaHZ5%{LQD
/** 7$lnCvm
* @author treeroot clV^Xg8D
* @since 2006-2-2 g?v(>#i
* @version 1.0 >":xnX#
*/ X2Z)> 10
public class SortUtil { CUI+@|]%
public final static int INSERT = 1; NT*r7_e
public final static int BUBBLE = 2; |K Rt$t
public final static int SELECTION = 3; T2<%[AF0
public final static int SHELL = 4; :gU5CUm
public final static int QUICK = 5; 0GrM:Lh y
public final static int IMPROVED_QUICK = 6; YPI)^ }
public final static int MERGE = 7; T8z?_ *k
public final static int IMPROVED_MERGE = 8; }Cu[x'J
public final static int HEAP = 9; WM ?a1j
Pn OWQ8=
public static void sort(int[] data) { `L`+`B
sort(data, IMPROVED_QUICK); &;d N:F;
} gx9Os2Z|3
private static String[] name={ :}v-+eIQ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;C$+8%P4
}; i>YQ<A1
K#wA ;
private static Sort[] impl=new Sort[]{ 1B2#uhT]r
new InsertSort(), Yu3S3aRE
new BubbleSort(), G$i)ELs
new SelectionSort(), hOAZvrfQ4
new ShellSort(), ~SQxFAto
new QuickSort(), 70c]|5
new ImprovedQuickSort(), 43AzNXWF8
new MergeSort(), UrvUt$WO
new ImprovedMergeSort(), %DKFF4k
new HeapSort() 3MQZ)!6
}; ~%/Rc`
hHE~/U
public static String toString(int algorithm){ 8mreHa
return name[algorithm-1]; TR0y4u[
} ^b+>r
tf~B,?
public static void sort(int[] data, int algorithm) { ?ZRF]\dP]
impl[algorithm-1].sort(data); mgjJNzclL
} $5&%X'jk
H>EM3cFU
public static interface Sort { {'O><4
public void sort(int[] data); Q[j| 2U
} D9oNYF-V
Iy9hBAg\y
public static void swap(int[] data, int i, int j) { XA2Ld
int temp = data; ^U_T<x8{
data = data[j]; ?J\&yJ_B
data[j] = temp; K?^;|m-
} 2nB99L{6
} %hnBpz