[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; MRg\FR2>1
} |8qK%n f}
int i1=l; u~- fK'/!|
int i2=mid+1; QB3d7e)8>
for(int cur=l;cur<=r;cur++){ }d3N`TT
if(i1==mid+1) t#pqXY/;D
data[cur]=temp[i2++]; eIUuq&(
else if(i2>r) i=X*
data[cur]=temp[i1++]; A6UdWK
else if(temp[i1] data[cur]=temp[i1++]; a}qse5Fr
else M`+e'vdw
data[cur]=temp[i2++]; k CW!m
} _E1]cbIo
} Hdbnb[e
UK~B[=b9
} Fwx~ ~"I
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改进后的归并排序: F'>GN}n
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package org.rut.util.algorithm.support; Q_]!an(
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import org.rut.util.algorithm.SortUtil; 5}MlZp
w{e3U7;
/** jQxPOl$-
* @author treeroot <qq'h
* @since 2006-2-2 UC+7-y,
* @version 1.0 VU`z|nBW@
*/ mzV"G>,o
public class ImprovedMergeSort implements SortUtil.Sort { aEEz4,x_
uVq5fT`B
private static final int THRESHOLD = 10; V3 _b!
Q3Z%a|3W
/* 9oje`Ay
* (non-Javadoc) #7~tL23}]
* I*:qGr+ WJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J|"nwY}a9
*/ :,%J6Zh?
public void sort(int[] data) { pqH( Tbjq
int[] temp=new int[data.length]; (o*e<y,}W
mergeSort(data,temp,0,data.length-1); vTMP&a'5L
} E)80S.V
RQo$iISwy
private void mergeSort(int[] data, int[] temp, int l, int r) { $d2kHT
int i, j, k; {8{t]LK<
int mid = (l + r) / 2; 8_<&f%/
if (l == r) esh$*)1
return; u 5Eo
if ((mid - l) >= THRESHOLD) ^x_ >r6
mergeSort(data, temp, l, mid); ;zZ,3pl-E
else ovQS ET18b
insertSort(data, l, mid - l + 1); LZUA+x(
if ((r - mid) > THRESHOLD) d DIQ+/mmg
mergeSort(data, temp, mid + 1, r); !v-w6WG"
else ?z5ne??
insertSort(data, mid + 1, r - mid); !c4)pMd
sP6 ):h
for (i = l; i <= mid; i++) { ZTh?^}/
temp = data; 1Nl&4YLO
} Q/QQ:t<XUi
for (j = 1; j <= r - mid; j++) { |{7e#ww]
temp[r - j + 1] = data[j + mid]; cyGN3t9`.
} Tsm1C#6 Y*
int a = temp[l]; Mt[Bq6}ZD
int b = temp[r]; !cN?SGafZI
for (i = l, j = r, k = l; k <= r; k++) { ;Na8_}
if (a < b) { nW$A^
data[k] = temp[i++]; Z]x5!
a = temp; } g3HoFC
} else { QmH/yy3.%
data[k] = temp[j--]; qE#&)
b = temp[j]; FX|0R#4vm
} J0?$v6S
} Jw:Fj{D
} *=$[}!YG
/'&.aGW4%
/** G *mO&:q
* @param data _&; ZmNNhc
* @param l b?Cmc
* @param i Y]+e Df
*/ < -Hs<T|tW
private void insertSort(int[] data, int start, int len) { :b<-[8d&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); mD D4_E2*
} Yl)eh(\&J
} ERp:EZ'
} 0(Y%,q
} wUru1_zjO
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堆排序： ee&nU(pK
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package org.rut.util.algorithm.support; ov\Ct%]
F-$Z,Q]S
import org.rut.util.algorithm.SortUtil; 0M#N=%31
K[Yc<Q
/** z3^RUoGU
* @author treeroot ; @7
* @since 2006-2-2 eZ!yPdgy|
* @version 1.0 ^H5w41
*/ V.K70)]
public class HeapSort implements SortUtil.Sort{ /{fZH,!L
F3r S6_
/* (non-Javadoc) W$z#ssr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =gW"#ZjL){
*/ <KHv|)ak
public void sort(int[] data) { #'J~Xk
MaxHeap h=new MaxHeap(); Qy{NS.T
h.init(data); wD<vg3e[H
for(int i=0;i h.remove(); ]~?S~l%
System.arraycopy(h.queue,1,data,0,data.length); {[Uti^)m%
} %:" RzHN
-/M9 vS
private static class MaxHeap{ 9Tzc(yCY
a<f;\$h]
void init(int[] data){ zo_k\K`{@
this.queue=new int[data.length+1]; 5c<b|
for(int i=0;i queue[++size]=data; <8iYL`3
fixUp(size); g/OI|1a
} ISpeV
} eZynF<i
!?BW_vY
private int size=0; AGh~8[
f|X[gL,B
private int[] queue; 8'3"uv
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public int get() { )2)Zz +<
return queue[1]; D8k*0ei&
} =Ml|l$
a;56k
public void remove() { C@ FxB[
SortUtil.swap(queue,1,size--); x HY+q;
fixDown(1); M{*kB2jr
} &@=u+)^-{
file://fixdown TRSOO}
private void fixDown(int k) { h^['rmd
int j; 9TqnzD
while ((j = k << 1) <= size) { W=~id"XtJ
if (j < size %26amp;%26amp; queue[j] j++; HMF8;,<_w?
if (queue[k]>queue[j]) file://不用交换 =8O}t+U
break; zXQVUhL6
SortUtil.swap(queue,j,k); 3|q2rA
k = j; /r>IV`n{
} e-~hS6p(
} =ZG<BG_
private void fixUp(int k) { Er`TryN|}
while (k > 1) { *]FgfttES
int j = k >> 1; ~af8p {
if (queue[j]>queue[k]) 1lbwJVY[
break; qO7fbql_
SortUtil.swap(queue,j,k); +<gg
k = j; l<$rqz3D
} D`V6&_.p
} =nLO?qoe
W5pn;u- sz
} b([:,T7
y^9bfMA
} I9;xzES
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SortUtil： TKK,Y{{
1d`cTaQ-
package org.rut.util.algorithm; K-Re"zsz
8098y,mQe
import org.rut.util.algorithm.support.BubbleSort; bi+9R-=&
import org.rut.util.algorithm.support.HeapSort; HB%K|&!+
import org.rut.util.algorithm.support.ImprovedMergeSort; uG4$2
import org.rut.util.algorithm.support.ImprovedQuickSort; O97VdNT8
import org.rut.util.algorithm.support.InsertSort; bk.*k~_
import org.rut.util.algorithm.support.MergeSort; w_\nB}_
import org.rut.util.algorithm.support.QuickSort; c2/"KT
import org.rut.util.algorithm.support.SelectionSort; j]AekI4I
import org.rut.util.algorithm.support.ShellSort; 64SW
H4W1\u
/** Ih; aBS
* @author treeroot aUAcRW
* @since 2006-2-2 D2{L=
* @version 1.0 2v4W6R
*/ SBC~QD>L+
public class SortUtil { ?fB5t;~E
public final static int INSERT = 1; Xj%,xm>}!u
public final static int BUBBLE = 2; 5Wo5n7o
public final static int SELECTION = 3; YDW|-HIF
public final static int SHELL = 4; NJk)z&M
public final static int QUICK = 5; &i)helXs]
public final static int IMPROVED_QUICK = 6; -=5EbNPwG
public final static int MERGE = 7; TM)u?t+[
public final static int IMPROVED_MERGE = 8; X2LV&oi
public final static int HEAP = 9; >$Fp}?xX
UnP|]]o:I
public static void sort(int[] data) { uN8/Q2
sort(data, IMPROVED_QUICK); { E^U6@
} oI*d/*
private static String[] name={ DjY8nePyE
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" P`tyBe#=
}; \Fq1^ 8qa
hv3;irK]&
private static Sort[] impl=new Sort[]{ p:Oz<P
new InsertSort(), -'j7SOGk
new BubbleSort(), eap8*ONl
new SelectionSort(), (nq^\ZdF
new ShellSort(), _p0)vT
new QuickSort(), f$vwuW
new ImprovedQuickSort(), ?HV}mS[t
new MergeSort(), t-x[:i
new ImprovedMergeSort(), zOL;"/R
new HeapSort() ;uK";we
}; 4oV {=~V
Q<1L`_.>
public static String toString(int algorithm){ Gy9 $Wj
return name[algorithm-1]; F.68iN}
} ZvH?3Jy
^,`M0g\$
public static void sort(int[] data, int algorithm) { S#mK Pi+3
impl[algorithm-1].sort(data); H$Kw=kMw
} mzz$`M1
f9a$$nb3`
public static interface Sort { >otJF3zw
public void sort(int[] data); ?.Q3 pUT
} )(lJT&e
<1K7@Tu
public static void swap(int[] data, int i, int j) { 3-iD.IAUm@
int temp = data; Od-Ax+Hp
data = data[j]; WtVf wC_
data[j] = temp; /9Z!p
} M1EOnq4-
} #~S>K3(