[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; !4t`Hv?'
} :k~dj C
int i1=l; ?eV_ACpZ8
int i2=mid+1; /g@^H/DO
for(int cur=l;cur<=r;cur++){ X'x3esw w
if(i1==mid+1) V.8%|-d
data[cur]=temp[i2++]; ]v\^&7pW
else if(i2>r) T`\]!>eb
data[cur]=temp[i1++]; mw4JQ\
else if(temp[i1] data[cur]=temp[i1++]; I^G^J M!
else BqB|Fo
data[cur]=temp[i2++]; |n`PESf_
} zb:kanb-
} Efx=T$%^&
{E51Kv&_
} KQ{Lt?S
u]M\3V.
改进后的归并排序: d)tiO2W
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package org.rut.util.algorithm.support; ^"x<)@X
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import org.rut.util.algorithm.SortUtil; SE)nD@:
?Vc0)
/** % 5z gd>
* @author treeroot a9l8{3
* @since 2006-2-2 m5*[t7@%
* @version 1.0 NYB "jKMk
*/ I9&lO/c0
public class ImprovedMergeSort implements SortUtil.Sort { c-B/~&
n@ [
private static final int THRESHOLD = 10; o=_c2m
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/* rF] +,4
* (non-Javadoc) 9S>g6}[E#0
* 68e[:wf
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H0>yi[2f
*/ wL3,g2-L
public void sort(int[] data) { 89HsPB1"t
int[] temp=new int[data.length]; |m;L?)F<
mergeSort(data,temp,0,data.length-1); }mk>!B}=
} `}fw1X5L
"9XfQ"P
private void mergeSort(int[] data, int[] temp, int l, int r) { N3%*7{X 9
int i, j, k; ] fwZAU
int mid = (l + r) / 2; V.=lGhi
if (l == r) .L EY=j!-s
return; uMmXs%9T
if ((mid - l) >= THRESHOLD) .=c<>/ 0
mergeSort(data, temp, l, mid); wCCV2tk
else :]WqfR)#
insertSort(data, l, mid - l + 1); 4kl Ao$
if ((r - mid) > THRESHOLD) )9L/sKz
mergeSort(data, temp, mid + 1, r); }6]0hWsN[
else }]6f+
insertSort(data, mid + 1, r - mid); p&Ed\aQ%z;
m3.sVI0I
for (i = l; i <= mid; i++) { }dYBces
temp = data; GF$`BGW
} A''pS
for (j = 1; j <= r - mid; j++) { M.[rLJZ4
temp[r - j + 1] = data[j + mid]; P_Hv%g
} t ^SzqB
int a = temp[l]; >:1P/U
int b = temp[r]; UE"GJt`I
for (i = l, j = r, k = l; k <= r; k++) { ,wAz^cK|
if (a < b) { o{WyQ&2N
data[k] = temp[i++]; 1AD]v<M
a = temp; SA"8!soY3
} else { q3P+9/6
data[k] = temp[j--]; (u1m]WYL
b = temp[j]; #,NvO!j<4
} 6'-As=iw
} 3V<&|
} 19UN*g3(
I5ZqBB
/** kHK0(bYK
* @param data Zjh2{ :
* @param l +&=?BC}L9^
* @param i aSutM
*/ 8|^CK|m6*
private void insertSort(int[] data, int start, int len) { R[B?C;+(O
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); SU.ythU2,c
} gABr@>Vv
} }^kL|qmjR
} s>n(`?@L
} ~@W*r5/
BMyzjteS+
堆排序： 3L5r*fa
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package org.rut.util.algorithm.support; p *w$:L
1GCzyBSbb
import org.rut.util.algorithm.SortUtil; IH*s8tPc
?Bi*1V<R
/** J @IS\9O
* @author treeroot Xd `vDgD
* @since 2006-2-2 l@Z6do
* @version 1.0 }28=
*/ ?/hZb"6W
public class HeapSort implements SortUtil.Sort{ ne}+E
BqK(DH^9N
/* (non-Javadoc) l`9t}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4'1m4Ugg
*/ OX]V)QHVZ
public void sort(int[] data) { e.d #wyeX
MaxHeap h=new MaxHeap(); xGk6n4Gg
h.init(data); 7r#ymQ
for(int i=0;i h.remove(); y[};J vk
System.arraycopy(h.queue,1,data,0,data.length); _f0C Y"
} KL,/2(
hB;VCg8
private static class MaxHeap{ bBcp9C)iY
<6TT)t<h
void init(int[] data){ VSX@e|Nj
this.queue=new int[data.length+1]; T=f|,sK +7
for(int i=0;i queue[++size]=data; Z4K+ /<I
fixUp(size); w8Q<r.
} ?4H#G)F
} k*rZ*sSp
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private int size=0; UB`ToE|Ii
wBj-m
private int[] queue; `$LWmm#
Xr63?N
public int get() { 4LcX<BU9
return queue[1]; +ECDD'^!
} e1myH6$W
S{]7C?4`
public void remove() { ZIR0PQh\
SortUtil.swap(queue,1,size--); N{SQ(%V
fixDown(1); WO5O?jo'
} Qp,DL@mp>8
file://fixdown \`V$ 'B{.
private void fixDown(int k) { U6ZR->:
int j; ]M>9ULQ
while ((j = k << 1) <= size) { J&/lx${
if (j < size %26amp;%26amp; queue[j] j++; gJiK+&8I
if (queue[k]>queue[j]) file://不用交换 _mvxsG
break; 5<pftTcZ
SortUtil.swap(queue,j,k); ?<&O0'Q
k = j; AE`We$!
} 3ya1'qUC
} lE8&..~l$+
private void fixUp(int k) { >7`<!YJkK
while (k > 1) { X=JmF97
int j = k >> 1; /v|"0
if (queue[j]>queue[k]) 9//+Bh
break; p9U?!L!y
SortUtil.swap(queue,j,k); XY.5Rno4
k = j; AsS$C&^
} TC~Q G$NW
} 87%*+n:?*
G&xo1K]
} E9|eu\
aV o;~h~
} <e]Oa$
etT +
SortUtil： e~ aqaY~}
[ xOzzp4
package org.rut.util.algorithm; zl-2$}<a
^_t%kmL`
import org.rut.util.algorithm.support.BubbleSort; RCTQhTy=
import org.rut.util.algorithm.support.HeapSort; &mj6rIz
import org.rut.util.algorithm.support.ImprovedMergeSort; )b<k#(i@#
import org.rut.util.algorithm.support.ImprovedQuickSort; YSJy`
import org.rut.util.algorithm.support.InsertSort; ]q-g[e'
import org.rut.util.algorithm.support.MergeSort; PkE5|d*,
import org.rut.util.algorithm.support.QuickSort; cYx4~V^
import org.rut.util.algorithm.support.SelectionSort; 4Wy<?O2
import org.rut.util.algorithm.support.ShellSort; Q9d`zR]
lf>*Y.!@me
/** FJ*i\Q/D
* @author treeroot RT93Mt%P
* @since 2006-2-2 ,\ 2a=Fp
* @version 1.0 6Ao%>;e*
*/ H/M Au7
public class SortUtil { V._6=ZJ
public final static int INSERT = 1; !3mA0-!+
public final static int BUBBLE = 2; qQpnLV4
public final static int SELECTION = 3; AC O)Dt(Y
public final static int SHELL = 4; N=:5eAza
public final static int QUICK = 5; {T"0DSV
public final static int IMPROVED_QUICK = 6; G*S|KH
public final static int MERGE = 7; -~eJn'W
public final static int IMPROVED_MERGE = 8; U.AjYez
public final static int HEAP = 9; 7NC=*A~
OmM=o*d
public static void sort(int[] data) { w;Q;[:y
sort(data, IMPROVED_QUICK); S$f6a'
} k5kdCC0FCk
private static String[] name={ *A}cL
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Qn ^bVhG+
}; Oz|K8p
|AlR^N
private static Sort[] impl=new Sort[]{ 6"c1;P!4
new InsertSort(), /h v4x9
new BubbleSort(), eI1GXQ%
new SelectionSort(), tb:L\A^:
new ShellSort(), axHK_1N{
new QuickSort(), ,>t69 Ad
new ImprovedQuickSort(), e*+FpW@
new MergeSort(), %/>xO3"T
new ImprovedMergeSort(), K1V#cB WO
new HeapSort() L< zD<M
}; h^ -.]Y
|QV!-LK
public static String toString(int algorithm){ %>gW9}kB
return name[algorithm-1]; .(J?a"
} b':|uu*/
Z):n c% S
public static void sort(int[] data, int algorithm) { a[lY S{
impl[algorithm-1].sort(data); AxxJk"v'y
} !v]b(z`Y
v/*Y#(X
public static interface Sort { %4\OPw&
public void sort(int[] data); =8gHS[
} ++L?+^h
M MzGd:0b
public static void swap(int[] data, int i, int j) { i(?,6)9
int temp = data; 1<ro7A4hK
data = data[j]; U/lM\3v/e
data[j] = temp; ;n\= R 5.
} fw oQ'&
} '8Phxx|