[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; aZP2R"
} z|uOJ0uK
int i1=l; ]n~yp5Nbr
int i2=mid+1; eUYZxe :6
for(int cur=l;cur<=r;cur++){ P_Z M'[
if(i1==mid+1) P2O\!'aEh
data[cur]=temp[i2++]; uG4$2
else if(i2>r) O97VdNT8
data[cur]=temp[i1++]; bk.*k~_
else if(temp[i1] data[cur]=temp[i1++]; w_\nB}_
else c2/"KT
data[cur]=temp[i2++]; j]AekI4I
} ?'Cb-C_
} hMv2"V-X
Ocybc%
} V>6QPA^
B<Ol+)@,}
改进后的归并排序: qbH%Hx
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package org.rut.util.algorithm.support; p*Xix%#6
Xj%,xm>}!u
import org.rut.util.algorithm.SortUtil; FzVZs#O
lBS"3s384
/** g#w`J\iz
* @author treeroot s}s|~
* @since 2006-2-2 k<!<<,Z
* @version 1.0 (9E( Q*J5x
*/ / HL_$g<
public class ImprovedMergeSort implements SortUtil.Sort { nMkOUW:T!
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private static final int THRESHOLD = 10; ]{<saAmJC
TopHE
/* w"1x=+
* (non-Javadoc) 7aV$YuL)X~
* $_wo6/J5+D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {aoMJJq
*/ pKq]X}[^c
public void sort(int[] data) { axtb<5&
int[] temp=new int[data.length]; B4IBuS
mergeSort(data,temp,0,data.length-1); ,'u*ZB;
} W-1sU g[AN
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private void mergeSort(int[] data, int[] temp, int l, int r) { ^}hJL7O'
int i, j, k; z4bN)W )p
int mid = (l + r) / 2; ![ a
if (l == r) C\OECVT
return; pp<E))&R
if ((mid - l) >= THRESHOLD) JwB"\&'1ZS
mergeSort(data, temp, l, mid); cu)U7
else -A}zJBcR
insertSort(data, l, mid - l + 1); F.68iN}
if ((r - mid) > THRESHOLD) ZvH?3Jy
mergeSort(data, temp, mid + 1, r); ^,`M0g\$
else S#mK Pi+3
insertSort(data, mid + 1, r - mid); CG.,/]_
S"Kq^DN
for (i = l; i <= mid; i++) { f9a$$nb3`
temp = data; >otJF3zw
} ?.Q3 pUT
for (j = 1; j <= r - mid; j++) { )(lJT&e
temp[r - j + 1] = data[j + mid]; <1K7@Tu
} h D.)M
int a = temp[l]; R#ya,L
int b = temp[r]; TU%bOAKF\
for (i = l, j = r, k = l; k <= r; k++) { "T7>)fbu
if (a < b) { zSKKr?{
data[k] = temp[i++]; @7%.7LK
a = temp; )nOE8y/
} else { yyjw?#\8
data[k] = temp[j--]; |kseKZ3
b = temp[j]; *,&S',S-
} 9n"V\e_R
} Kr]z]4.d@
} kutJd{68
/kRAt^4!
/** modC6d%
* @param data "W5rx8a
* @param l #3+~.,X9
* @param i 0p `")/
*/ ke\[wa_!6b
private void insertSort(int[] data, int start, int len) { W+\?~L.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `c9'0*-
} l!:^6i
} lm*g Gy1i
} 2T?TM! \Q
} zqf[Z3
o,*=$/or
堆排序： x6v,lR
p?kvW42/
package org.rut.util.algorithm.support; ^KbL ,T
v%nP*i9
import org.rut.util.algorithm.SortUtil; $''UlWK
1x{kl01m%
/** _C$X04bU3V
* @author treeroot qe%V#c
* @since 2006-2-2 #Kl}= 1 4
* @version 1.0 [,b)YjO~Xd
*/ QZ~0o7
public class HeapSort implements SortUtil.Sort{ 03_pwB)^
mf9hFy*<4
/* (non-Javadoc) = ^s$ <
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c0ZaFJ
*/ N&m_e)E5c
public void sort(int[] data) { 5gshKmt_
MaxHeap h=new MaxHeap(); V&iS~V0.
h.init(data); wDKELQ(yH
for(int i=0;i h.remove(); >vAN(3Idu
System.arraycopy(h.queue,1,data,0,data.length); 0X>T+A[E
} uY]0dyI
yLqF ,pvO
private static class MaxHeap{ b i~=x
+GeWg` \=
void init(int[] data){ `*k@4.J{
this.queue=new int[data.length+1]; 'Wp@b678
for(int i=0;i queue[++size]=data; G "brT5:
fixUp(size); >f@ G>H)+
} y\,f6=%k
} " #v%36U
3[VNsX
private int size=0; ;7j,MbU
*|KVN&#
private int[] queue; b 4OnZ;FI
^{[[Z.&R?
public int get() { w & P&7
return queue[1]; Z0\Iyc G
} t^U^Tr
SiTeB)/
public void remove() { M1{(OY(G
SortUtil.swap(queue,1,size--); niz'b]] +
fixDown(1); wE6A 7\k%
} 328L)BmW
file://fixdown V|: qow:F
private void fixDown(int k) { Z&Pu8zG /m
int j; lDN?|YG
while ((j = k << 1) <= size) { q3+8]-9|5
if (j < size %26amp;%26amp; queue[j] j++; D/:3RZF
if (queue[k]>queue[j]) file://不用交换 %*K;np-q{
break; 1tGgDbJU
SortUtil.swap(queue,j,k); MI*Sq\-i
k = j; !y[3]8Xxv
} u"Y]P*[k
} 0OWL
private void fixUp(int k) { 6bL~6-h%)
while (k > 1) { 1-o V-K
int j = k >> 1; `D2Mss$!
if (queue[j]>queue[k]) ArXl=s';s4
break; t9` Ed>a
SortUtil.swap(queue,j,k); Ct!S Tk[2
k = j; >lLo4M 3
} A ~&+F>Z
} "~\*If
~ffwLgu!
} Mudrg[@`
JA6";fl;
} :<utq|#s
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SortUtil： "+h/-2rA
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package org.rut.util.algorithm; B*79qq
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import org.rut.util.algorithm.support.BubbleSort; 5[R?iSGL1
import org.rut.util.algorithm.support.HeapSort; l$M +.GB<
import org.rut.util.algorithm.support.ImprovedMergeSort; gtYRV*^q
import org.rut.util.algorithm.support.ImprovedQuickSort; qm%nIU \*
import org.rut.util.algorithm.support.InsertSort; >>7aw" 0
import org.rut.util.algorithm.support.MergeSort; BY( eV!
import org.rut.util.algorithm.support.QuickSort; 9)lZyE}
import org.rut.util.algorithm.support.SelectionSort; rQj~[Y.c
import org.rut.util.algorithm.support.ShellSort; 1exfCm
0>@[o8
/** $$4W}Ug3U
* @author treeroot fM^<+o@
* @since 2006-2-2 '5rUe\k
* @version 1.0 9o_-=>(
*/ yL&/m~{s
public class SortUtil { ] .5OX84
public final static int INSERT = 1; - _t&+5]
public final static int BUBBLE = 2; RL&lKHA
public final static int SELECTION = 3; }0{B
public final static int SHELL = 4; +)gB9DoK
public final static int QUICK = 5; O-!,Jm
public final static int IMPROVED_QUICK = 6; `{}@@]
public final static int MERGE = 7; &J(!8y*QyE
public final static int IMPROVED_MERGE = 8; v3-?CQb(
public final static int HEAP = 9; I%xn,u
Xw^X&Pp
public static void sort(int[] data) { "&-C$J5 Id
sort(data, IMPROVED_QUICK); uvv.WbZ
} ,Rz}=j
private static String[] name={ o;QZe&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" SdI1}&
}; P4 6,o
~ 5"J(
private static Sort[] impl=new Sort[]{ L_?$ayZ;
new InsertSort(), a5V=!OoMk
new BubbleSort(), o5 WW{)Q
new SelectionSort(), _9kIRmT{
new ShellSort(), Tl3"PIb
new QuickSort(), 6K 4+0xXv
new ImprovedQuickSort(), YoAg
new MergeSort(), f:vD`Fz1
new ImprovedMergeSort(), 5\S&)ZA@
new HeapSort() 98UlNP
}; h=[-Er'B
xa#gWIP*
public static String toString(int algorithm){ F$yeF^\g
return name[algorithm-1]; [Vp\$;\nT
} Le&;g4%
T2|:nC)@
public static void sort(int[] data, int algorithm) { ML=z<u+
impl[algorithm-1].sort(data); ^:z7E1~
} f3&/r
|!Ists
public static interface Sort { A.U'Q|
public void sort(int[] data); fU ={a2
} IG|\:Xz
)U5u" ]9~
public static void swap(int[] data, int i, int j) { v{koKQ'Y()
int temp = data; CZ tiWZ
data = data[j]; M/B/b<['
data[j] = temp; 5i9Ub|!P
} w-FHhf
} ]^'ZiyJX