[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; |lcp (u*u
} ="5D}%
int i1=l; ,/%'""`w
int i2=mid+1; <=V{tl
for(int cur=l;cur<=r;cur++){ ^vPsp?
if(i1==mid+1) d]Y;rqjue
data[cur]=temp[i2++]; MI'"Xzp{s
else if(i2>r) Lg~C:BNF
data[cur]=temp[i1++]; C[}UQod0
else if(temp[i1] data[cur]=temp[i1++]; Fuzb4Df
else \+#EO%sN1%
data[cur]=temp[i2++]; /`l;u7RD
} }W'4(V;:
} 2lO(f+
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} zPc"r$'0U
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改进后的归并排序: P%)r4+at
6Iqy"MQuq
package org.rut.util.algorithm.support; pr,,E[
hPUAm6b;
import org.rut.util.algorithm.SortUtil; ^Fh*9[Zf$
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/** k#zDY*kj
* @author treeroot |?#JCG
* @since 2006-2-2 A[8m3L#k
* @version 1.0 E]rXp~AZm
*/ u5Vgi0}A
public class ImprovedMergeSort implements SortUtil.Sort { ZMb+sUK
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private static final int THRESHOLD = 10; Q"ZpT
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/* YR*gOTD
* (non-Javadoc) rD~/]y)t
* .wD $Bsm`t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `!/[9Y#Hp
*/ }L)[>
public void sort(int[] data) { GTM0Qvf?
int[] temp=new int[data.length]; ;aV3j/
mergeSort(data,temp,0,data.length-1); L FkDb}
} 5h&sdzfG
aZ4?!JW.
private void mergeSort(int[] data, int[] temp, int l, int r) { ZX` \so,&,
int i, j, k; DH yv^
int mid = (l + r) / 2; 2t9UJu4
if (l == r) $Yt|XT+!&
return; 0M"n
if ((mid - l) >= THRESHOLD) 7;o:r$08&}
mergeSort(data, temp, l, mid); S)rr
else 60vmjmXl
insertSort(data, l, mid - l + 1); \1jThJn
if ((r - mid) > THRESHOLD) yAryw{(
mergeSort(data, temp, mid + 1, r); jel:oy|_
else fwv^dEe
insertSort(data, mid + 1, r - mid); Vf&U`K
D9[19,2r`
for (i = l; i <= mid; i++) { 7%i'F=LzT
temp = data; o 2Nu@^+
} V!+iq*Z|=
for (j = 1; j <= r - mid; j++) { 3"7Q[9Oj
temp[r - j + 1] = data[j + mid]; ?!P0UTe~
} G;}WZy
int a = temp[l]; hHN[K
int b = temp[r]; m2\\!C]f
for (i = l, j = r, k = l; k <= r; k++) { 'RV96lX<
if (a < b) { =S`h/fru
data[k] = temp[i++]; Ohk\P;}
a = temp; ?"mZb#%
} else { lc[6Mpi7s[
data[k] = temp[j--]; nsRCDUCi
b = temp[j]; dGYR 'x
} M; wKTTQy
} l.o/H|
} 1~c\J0h)d
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/** bRxI7 '
* @param data Ze~P6
* @param l Uv(R^50>
* @param i 0[l}@K?
*/ ZPmqoR[
private void insertSort(int[] data, int start, int len) { J:N(U0U
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <"5l<E
} 94+^K=lAX
} q*UHzE:LI
} bW6| &P}X
} ~i"=:D
F<,pAxl~@
堆排序： lH4Nbluc^
x(TF4W=j
package org.rut.util.algorithm.support; ks0Q+YW
?Fl}@EA#M
import org.rut.util.algorithm.SortUtil; %=UD~5!G0
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/** KMj\A d
* @author treeroot }#FV{C]
* @since 2006-2-2 wuH*a3(
* @version 1.0 wHj1+W
*/ $&as5z8
public class HeapSort implements SortUtil.Sort{ ._G,uP$
-`PziGl@<
/* (non-Javadoc) ^YLC{V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) o99ExQ.
*/ <{kPa_`'
public void sort(int[] data) { _u[tv,
MaxHeap h=new MaxHeap(); 1?Y>Xz
h.init(data); <-v zS;
for(int i=0;i h.remove(); =HCEUB9Fs
System.arraycopy(h.queue,1,data,0,data.length); \#HW.5
} JD$g%hcVZa
rkjnw@x\
private static class MaxHeap{ Wk0E7Pr
!i;6!w
void init(int[] data){ ']1n?K=A
this.queue=new int[data.length+1]; IE`3I#v
for(int i=0;i queue[++size]=data; r%.k,FzGZY
fixUp(size); 0V1GX~2
} r@4A%ql<
} t(#9.b`W)
2t\0vV2)/O
private int size=0; a<<4gXx
]@#9B>v=
private int[] queue; |fgUW.
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public int get() { \jiE:Qt
return queue[1]; |SkQe[t
} OT 0c5x
I_r@Y:5{
public void remove() { Me.I>7c
SortUtil.swap(queue,1,size--); s(=wG|
fixDown(1); $X#y9<bW
} <N vw*yA
file://fixdown Vgm'&YT
private void fixDown(int k) { IEhD5?
int j; |8k1Bap`z
while ((j = k << 1) <= size) { Kv| x -_7
if (j < size %26amp;%26amp; queue[j] j++; 0SI@`C*1o
if (queue[k]>queue[j]) file://不用交换 1B4Qj`:+0
break; PR@6=[|d
SortUtil.swap(queue,j,k); KR>)Ek
k = j; Iq+N0G<j
} Pf[E..HF*d
} XRV]u|w=g
private void fixUp(int k) { KW .4 9
while (k > 1) { cqG6di7#
int j = k >> 1; pp@ Owpb
if (queue[j]>queue[k]) V'i-pn2gyu
break; '#+&?6p
SortUtil.swap(queue,j,k); 0vv~G\yM
k = j; 0nb%+],pX
} TF8#I28AD
} ^p3GT6
"W7|Xp
} `WayR^9
ab6I*DbF
} ''nOXl
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SortUtil： )=5&Q
Pu3oQDldV
package org.rut.util.algorithm; [~9UsHfH
O52/fGt
import org.rut.util.algorithm.support.BubbleSort; x"b'Pmw
import org.rut.util.algorithm.support.HeapSort; VhO%4[Jl
import org.rut.util.algorithm.support.ImprovedMergeSort; l!tR<$|
import org.rut.util.algorithm.support.ImprovedQuickSort; IbI0".o
import org.rut.util.algorithm.support.InsertSort; GKt."[seV
import org.rut.util.algorithm.support.MergeSort; 36=aahXd\
import org.rut.util.algorithm.support.QuickSort; (uC8M,I\
import org.rut.util.algorithm.support.SelectionSort; fu5L)P^T
import org.rut.util.algorithm.support.ShellSort; q/ljH_-
]}v]j`9m%
/** b}K,wAx
* @author treeroot pl]|yIZ
* @since 2006-2-2 KqFI2@v
* @version 1.0 {:1j>4m2
*/ BP3Ha8/X
public class SortUtil { 1wR[nBg*|
public final static int INSERT = 1; oXm !
public final static int BUBBLE = 2; IXy6Yn9l
public final static int SELECTION = 3; KwL_ae6fV
public final static int SHELL = 4; :F:1(FDP
public final static int QUICK = 5; ?h}NL5a
public final static int IMPROVED_QUICK = 6; hN3FH#YO
public final static int MERGE = 7; r)^sHpK:`
public final static int IMPROVED_MERGE = 8; XFS~
public final static int HEAP = 9; (tg.]q_=u
0-Mzb{n5
public static void sort(int[] data) { '9}&@;-_
sort(data, IMPROVED_QUICK); i7#4&r
} &e^;;<*w
private static String[] name={ zZ%[SW&vC
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" tj13!Cc}e`
}; ,:t,$A
vJ&_-CX
private static Sort[] impl=new Sort[]{ 4}H+hk8-
new InsertSort(), 8US#SI'x
new BubbleSort(), GLf!i1Z
new SelectionSort(), -EiTP:A
new ShellSort(), J p?XV<3Z
new QuickSort(), h.EI(Ev"GN
new ImprovedQuickSort(), H,(vTthd
new MergeSort(), #~ x7G
new ImprovedMergeSort(), gC1LQ!:;Oi
new HeapSort() k6bct@7
}; >$D!mraih
/yI4;:/
public static String toString(int algorithm){ OFtaOjsyUa
return name[algorithm-1]; jqaX|)8|$
} m'"r<]pB*4
Skt-5S#
public static void sort(int[] data, int algorithm) { wMVUTm
impl[algorithm-1].sort(data); $?56 i4
} n4{%M
+9Tc.3vQ
public static interface Sort { EVPQe-
public void sort(int[] data); pCE GZV,d@
} B7f<XBU6>
O)q4^AE$
public static void swap(int[] data, int i, int j) { g#$ C8k
int temp = data; oP,*H6)i
data = data[j]; n6oOknCna
data[j] = temp; PBn7{( x
} v5M4Rs&t
} h*fN]k6