[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; BQs~>}(V
} isdEs k#A.
int i1=l; Z[(V0/[]
int i2=mid+1; kpe7\nd=>
for(int cur=l;cur<=r;cur++){ $IuN(#
if(i1==mid+1) EB/.M+~a
data[cur]=temp[i2++]; ?=UIx24W
else if(i2>r) CdTyUl
data[cur]=temp[i1++]; v Ft]n
else if(temp[i1] data[cur]=temp[i1++]; uSAb
else z3RlD"F1
data[cur]=temp[i2++]; #^\qFj
} Ws+Zmpk%
} SS4'yaQ
v}$s,j3NO
} *\UxdL 22
c|kQ3(
改进后的归并排序: ;[)t*yAh
rm-6Az V
package org.rut.util.algorithm.support; ^G(/;c*=
Kn#3^>D
import org.rut.util.algorithm.SortUtil; ?q68{!{bi
L5"|RI}
/** 2EHeQ|#
* @author treeroot oic}Go
* @since 2006-2-2 p|W <xFk
* @version 1.0 dIOj]5H3F
*/ 5]Wkk~a
public class ImprovedMergeSort implements SortUtil.Sort { !kPZuU`T
m&'z|eN
private static final int THRESHOLD = 10; Qx_K)
o9tvf|+z
/* U 0$?:C+?
* (non-Javadoc) K?y!zy
* wbC'SOM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %cWy0:F5VY
*/ qJ;T$W=NG
public void sort(int[] data) { M5SAlj
int[] temp=new int[data.length]; ~MvLrg"i
mergeSort(data,temp,0,data.length-1); _` %z
} ,oW8im
oEqt7l[I{
private void mergeSort(int[] data, int[] temp, int l, int r) { g@&@]63
int i, j, k; $ }u,uI
int mid = (l + r) / 2; (Ea)`'/
if (l == r) =5JTVF
return; bdn{Y
if ((mid - l) >= THRESHOLD) u6~|].j R
mergeSort(data, temp, l, mid); nUZ+N)*
else aB`x5vg7ho
insertSort(data, l, mid - l + 1); =uZOpeviQ
if ((r - mid) > THRESHOLD) Z/z(P8#U\
mergeSort(data, temp, mid + 1, r); S?Y,sl+A:
else </K"\EU
insertSort(data, mid + 1, r - mid); |JpLMUG
^JDiI7
for (i = l; i <= mid; i++) { ;rSpM
temp = data; DqLZc01>
} ar0y8>]3
for (j = 1; j <= r - mid; j++) { #j_<iy
temp[r - j + 1] = data[j + mid]; G<1awi
} P'prp=JD
int a = temp[l]; =H'7g6
int b = temp[r]; ^ fo2sN"
for (i = l, j = r, k = l; k <= r; k++) { 49o5"M(
if (a < b) { `-l,`7e'
data[k] = temp[i++]; ^&o38=70*
a = temp; (6C%w)8'
} else { UB3b
data[k] = temp[j--]; }gE?ms4$
b = temp[j]; {+V1>6
} N'L3Oa\%
} _,hhO
} B!vI^W
~E2xIhV
/** giy4<
* @param data Pg3O )D9
* @param l fP41B
* @param i ZJotg*I
*/ 8ODrW!o
private void insertSort(int[] data, int start, int len) { Qrt[MJ+#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +L4_]
} I'URPj:t
} -[kbHrl&
} b"+J8W
} M1Jnn4w*d
;cBFft}D
堆排序： w5I +5/I
8oI)q4V
package org.rut.util.algorithm.support; ^O cM)Z6h
W/O&(t
import org.rut.util.algorithm.SortUtil; Z8\c'xN
YuWsE4$
/** C7ZU)MEUd/
* @author treeroot Xa._
* @since 2006-2-2 RlU=
* @version 1.0 l\W[WQPh
*/ V$Y5EX
public class HeapSort implements SortUtil.Sort{ Vi~9[&.E\!
em@\S
/* (non-Javadoc) j HT2|VGb*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) neGCMKtzlJ
*/ I!y[7^R
public void sort(int[] data) { }.<%46_Z-
MaxHeap h=new MaxHeap(); ]KMOLe6(
h.init(data); hSmu"a,S
for(int i=0;i h.remove(); D.2HM
System.arraycopy(h.queue,1,data,0,data.length); C LhD[/Fo
} UE4zmIq
h' OLj#H
private static class MaxHeap{ X0X!:gX
F=C8U$'S
void init(int[] data){ gt3;Xi
this.queue=new int[data.length+1]; >pKu G#
for(int i=0;i queue[++size]=data; =N-,.{`
fixUp(size); oWVlHAPj
} fu/v1Nhm
} 0zg\thL
'|r('CIBN/
private int size=0; 4 |$|]E
]XEkQ
private int[] queue; &Y2mLPB
~%9ofXy
public int get() { pPcn F`A
return queue[1]; <!h&h
} bdiyS.a-
C[$uf
public void remove() { 1MdVWFKXV
SortUtil.swap(queue,1,size--); 6g@@V=mf
fixDown(1); jP6;~[rl
} CtwMMZXX3
file://fixdown |[x) %5F
private void fixDown(int k) { W! FmC$Kc
int j; }Y(yDg;"
while ((j = k << 1) <= size) { 3Q^@!hu
if (j < size %26amp;%26amp; queue[j] j++; ?^9TtxM
if (queue[k]>queue[j]) file://不用交换 ``o:N`
break; {5U;9: sO6
SortUtil.swap(queue,j,k); dq?q(_9
k = j; 3\6UH
} c?L_n=B
} 2RDos#
private void fixUp(int k) { IAbK]kA
while (k > 1) { #`5 M( o
int j = k >> 1; \[&~.B
if (queue[j]>queue[k]) >a98H4
break; P)~PrTa%
SortUtil.swap(queue,j,k); 8o~<\eF%
k = j; 94L P )n
} {\G4YQ
} `Nnqdc2
Pg%OFhA
} $l}MB7
%p?u ^rq
} ='=\!md
2~+Iu+
SortUtil： ?6@Y"5 z3g
e[}R1/!L
package org.rut.util.algorithm; ,R$n I*mf_
F|X-|Co
import org.rut.util.algorithm.support.BubbleSort; }5^j08
import org.rut.util.algorithm.support.HeapSort; j'i-XIs
import org.rut.util.algorithm.support.ImprovedMergeSort; sbOa] 5]
import org.rut.util.algorithm.support.ImprovedQuickSort; [#H$@g|CT
import org.rut.util.algorithm.support.InsertSort; +x$;T*0
import org.rut.util.algorithm.support.MergeSort; xKz^J SF
import org.rut.util.algorithm.support.QuickSort; ;pdW7
import org.rut.util.algorithm.support.SelectionSort; emb~l{K$
import org.rut.util.algorithm.support.ShellSort; 2E/#fX9!4
fRJSo%
/** s%`o
* @author treeroot b w5|gmO
* @since 2006-2-2 6Gjr8
* @version 1.0 NS"hdyA
*/ 0V*L",9M
public class SortUtil { zw^jIg$
public final static int INSERT = 1; ^1U2&S
public final static int BUBBLE = 2; V0R;q
public final static int SELECTION = 3; 6sl*Ko[
public final static int SHELL = 4; Kx6_Vp
public final static int QUICK = 5; 67 >*AL
public final static int IMPROVED_QUICK = 6; D!TL~3d 1
public final static int MERGE = 7; M")v ph^
public final static int IMPROVED_MERGE = 8; @#ih;F
public final static int HEAP = 9; Y;S+2])R2
PL<q|y
public static void sort(int[] data) { '.oEyZA;o
sort(data, IMPROVED_QUICK); f+Nq?GvwBQ
} CDei+ q
private static String[] name={ iUqL /
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >:5/V0;,
}; !<}<HR^)
N. 3 x[%:
private static Sort[] impl=new Sort[]{ j2"jCv
new InsertSort(), nm66U4.@
new BubbleSort(), }NDw3{zn
new SelectionSort(), ~^=QBwDW8N
new ShellSort(), 4`)B@<
new QuickSort(), XbYW,a@w2
new ImprovedQuickSort(), gPY2Bnw;l
new MergeSort(), D52ELr7
new ImprovedMergeSort(), swuW6p
new HeapSort() OUn,URI
}; R@t?!`f!+
UO8#8
public static String toString(int algorithm){ Z2`(UbG}
return name[algorithm-1]; o <8L,u(U
} $zq`hI!1
9)s=%dL
public static void sort(int[] data, int algorithm) { MsCY5g
impl[algorithm-1].sort(data); IX;u+B
} d_Ll,*J9
30g-J(Zg
public static interface Sort { )Z0pU\
public void sort(int[] data); V3K
} Ab -uK|<
om$)8'A,l
public static void swap(int[] data, int i, int j) { v"6q!
int temp = data; ^,'!j/w5
data = data[j]; L~SM#?z:ue
data[j] = temp; HS]|s':
} "zR+}
} f$9V_j-K+