[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; FZ>*<&
} vc2xAAQ
int i1=l; yT&bS\
int i2=mid+1; ?E2k]y6<
for(int cur=l;cur<=r;cur++){ ^BM/K&7^
if(i1==mid+1) %:o@IRTRU
data[cur]=temp[i2++]; ](0Vm_es
else if(i2>r) x#0C+cU
data[cur]=temp[i1++]; Jb-wvNJu
else if(temp[i1] data[cur]=temp[i1++]; x=B+FIJ
else =] 5;=>(
data[cur]=temp[i2++]; <nsl`C~6g0
} l1cBY{3QD
} "|DR"rr'j
eq/5$b(
} )C2d)(baEJ
1|w,Z+/
改进后的归并排序: =zA=D.D2
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package org.rut.util.algorithm.support; UKK}$B
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import org.rut.util.algorithm.SortUtil; (P#2Am$
o33{tUp'
/** ,:\2Lf
* @author treeroot l3MbCBX2
* @since 2006-2-2 qd|*vE
* @version 1.0 `A <yDy
*/ GP1>h.J
public class ImprovedMergeSort implements SortUtil.Sort { eZHzo
G^mk<pH
private static final int THRESHOLD = 10; 'v|2}T*
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/* P'9aZd
* (non-Javadoc) om_&|9B)
* h.=B!wKK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J|FyY)_
*/ &<Gq-IN
public void sort(int[] data) { 1]>KuXd r
int[] temp=new int[data.length]; j|G-9E
mergeSort(data,temp,0,data.length-1); oZCi_g 5i
} g41Lh3dj
T4!]^_t^
private void mergeSort(int[] data, int[] temp, int l, int r) { @I"Aet'XV
int i, j, k; ,O~2 R
int mid = (l + r) / 2; C-Fp)Zs{0
if (l == r) '*,4F'
return; j[U0,]
if ((mid - l) >= THRESHOLD) c?R.SBr,'
mergeSort(data, temp, l, mid); UiZ61lw
else Gm2rjpZeq
insertSort(data, l, mid - l + 1); UdI>x 4bI
if ((r - mid) > THRESHOLD) DpS6>$v8t
mergeSort(data, temp, mid + 1, r); omjLQp[%
else rFy9K4D
insertSort(data, mid + 1, r - mid); Na~_=3+a
wO!hVm,Ta
for (i = l; i <= mid; i++) { Y!7P>?)`,X
temp = data; k(qQvn
} g?$9~/h :;
for (j = 1; j <= r - mid; j++) { }"&(sYQ*`
temp[r - j + 1] = data[j + mid]; Ro1' L1:
} ^,KR0
int a = temp[l]; FoG<$9
int b = temp[r]; 5nj~RUK
for (i = l, j = r, k = l; k <= r; k++) { b<( W}$x
if (a < b) { &vF"I'V
data[k] = temp[i++]; )(L&+DDy
a = temp; <@vE3v;
} else { ;ZqFrHI M`
data[k] = temp[j--]; AX,Db%`l,
b = temp[j]; :9h8q"T
} Gj^bz'2
} |wb7`6g
} |fI%L9
9bNIaC*M
/** cY"^3Ot%^
* @param data *tO<wp&
* @param l B)Q'a3d#
* @param i (;j7{(
*/ @iP6N
private void insertSort(int[] data, int start, int len) { hrL<jcv|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _N:h&uw
} 4By-+C*
} _[phs06A
} eLYFd,?9
} jF;4 8g@^
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堆排序： 8 KkpXaz
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package org.rut.util.algorithm.support; \;6F-0
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import org.rut.util.algorithm.SortUtil; @ubz?5
1wgu%$|d
/** Yq^y"rw
* @author treeroot Zb}PP;O
* @since 2006-2-2 g7P1]CZ}
* @version 1.0 |:#mw1
*/ i`SF<)M(
public class HeapSort implements SortUtil.Sort{ 31*6 ;(
JJ~?ON.H
/* (non-Javadoc) _)l %-*Z7p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) biG9?
*/ 84[^#ke
public void sort(int[] data) { r9Z/y*q
MaxHeap h=new MaxHeap(); u7=[~l&L
h.init(data); 'JMa2/7CG
for(int i=0;i h.remove(); kUUq9me&o
System.arraycopy(h.queue,1,data,0,data.length); #~x5}8
} *[5
tAA7
private static class MaxHeap{ 5q ,
]2(c$R
void init(int[] data){ %8L<KJd
this.queue=new int[data.length+1]; ffM(il/2
for(int i=0;i queue[++size]=data; 5G<CDgl^!
fixUp(size); 4cQ5E9
} mvgm o
} RF)B4D-W
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private int size=0; *jK))|%
vs. uq
private int[] queue; HUC2RM?FN
+I<Sq_-
public int get() { faq K D:
return queue[1]; #FB>}:L{h*
} [!&k?.*;<
A,{D9-%
public void remove() { FZnHG;af
SortUtil.swap(queue,1,size--); .NT&>X~.V
fixDown(1); zcKC5vqb
} ElXe=5L\#
file://fixdown i'wF>EBz
private void fixDown(int k) { V@S/!h+
int j; !7)ID7d
while ((j = k << 1) <= size) { #'x?)AS
if (j < size %26amp;%26amp; queue[j] j++; 5Mr;6 ]I<
if (queue[k]>queue[j]) file://不用交换 {_Qxe1^g
break; / D ]B
SortUtil.swap(queue,j,k); 2]9<%-=S
k = j; U_- K6:tr
} kkBU<L2
} IBkH+j
private void fixUp(int k) { HzV+g/8>A
while (k > 1) { y.:-
int j = k >> 1; $-]setdY
if (queue[j]>queue[k]) winJ@IYW
break; C/waH[Yzan
SortUtil.swap(queue,j,k); UWp8I)p!\O
k = j; l _O~v?
} RuNH (>Eb
} ennz/'
t4_K>Mj+d
} (u&yb!`
0NtsFPO
} ]&U|d
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SortUtil： &t/<yq}{
9yo[T(8
package org.rut.util.algorithm; %`QsX {?,
iwJ-<v_:h
import org.rut.util.algorithm.support.BubbleSort; eH
import org.rut.util.algorithm.support.HeapSort; T(UYlLe
import org.rut.util.algorithm.support.ImprovedMergeSort; mzxvfXSF
import org.rut.util.algorithm.support.ImprovedQuickSort; 2U'JzE^Do
import org.rut.util.algorithm.support.InsertSort; :5M}Iz7
import org.rut.util.algorithm.support.MergeSort; M5kHD]b
import org.rut.util.algorithm.support.QuickSort; ^3|$wB=
import org.rut.util.algorithm.support.SelectionSort; bM^A9BxD
import org.rut.util.algorithm.support.ShellSort; \a2oM$PX
GFdJFQio
/** }8M`2HMFR
* @author treeroot kQd[E-b7
* @since 2006-2-2 S1juAV=
* @version 1.0 0a6@HwO
*/ 0^.4eX:E_
public class SortUtil { +N$7=oGC
public final static int INSERT = 1; UT<bv}(J
public final static int BUBBLE = 2; Qz)8eIO:
public final static int SELECTION = 3; 0D3+R1>_D
public final static int SHELL = 4; k*3_) S -
public final static int QUICK = 5; %4|}&,%%r
public final static int IMPROVED_QUICK = 6; ^Pg YP
public final static int MERGE = 7; ,XG|oo-
public final static int IMPROVED_MERGE = 8; M(zY[O
public final static int HEAP = 9; qb>r\bc
T0v@mXBQ
public static void sort(int[] data) { ilp;@O6
sort(data, IMPROVED_QUICK); 60%~+oHi~
} Usf"K*A
private static String[] name={ dh;MpE
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0 ,Qj:
}; y?z_^ppj
gVA}?t;
private static Sort[] impl=new Sort[]{ tD7C7m
new InsertSort(), "8iiRzt#
new BubbleSort(), O"qa&3t%
new SelectionSort(), VgsCwJ9w
new ShellSort(), 2<o[@w
new QuickSort(), [G[{l$Eit
new ImprovedQuickSort(), O|OSE
new MergeSort(), a^\- }4yR
new ImprovedMergeSort(), PtQ#
new HeapSort() @~#79B"9&
}; .cT$h?+jyl
*CY6 a
public static String toString(int algorithm){ CDwIq>0j
return name[algorithm-1]; aQ&8fteFR
} lDPRn~[#\
hW!@$Ph
public static void sort(int[] data, int algorithm) { #D LT-G0
impl[algorithm-1].sort(data); 2}`Vc{\
} aU.0dsq
zNr_W[
public static interface Sort { <aSLm=
public void sort(int[] data); _h=<_Z
} AV[PQI
JIbzh?$aD
public static void swap(int[] data, int i, int j) { XJlDiBs9=Q
int temp = data; [+MH[1Vr={
data = data[j]; U~#^ ^
data[j] = temp; >RL6Jbo|
} `k{ff
} w[YkTv