[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; Ro}7ERA
} ~]sj.>P
int i1=l; nt 9LBea
int i2=mid+1; zd%n)jlwR
for(int cur=l;cur<=r;cur++){ :B^YK].
if(i1==mid+1) X;e=d+pw
data[cur]=temp[i2++]; A-n@:` n~
else if(i2>r) Mi>!
data[cur]=temp[i1++]; ZmLA4<
else if(temp[i1] data[cur]=temp[i1++]; pZE}<EX
else QN4{xf:}S
data[cur]=temp[i2++]; BlLK6"gJT
} /9SEW!E
} Y ~TR`y
Z\YCjs%
} B$=oU
/)%$xi
改进后的归并排序: PO*;V<^
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package org.rut.util.algorithm.support; _4#Mdnh}[
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import org.rut.util.algorithm.SortUtil; (DLk+N4UHA
?-Qq\D^+
/** `EXo=Dqc
* @author treeroot f|v5itO2
* @since 2006-2-2 COc,
* @version 1.0 $_cO7d
*/ *VUD!`F
public class ImprovedMergeSort implements SortUtil.Sort { H=/;
J-UqH3({Z,
private static final int THRESHOLD = 10; 0~a9gBG
009[`Z
/* XRl!~Y|
* (non-Javadoc) 9QXBz=Fnf
* +YJpVxYmZ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) HXeX!
*/ +g9CklJ
public void sort(int[] data) { Exb?eHO
int[] temp=new int[data.length]; q`Rc \aWB%
mergeSort(data,temp,0,data.length-1); .](~dVp%~
} @u>:(9bp
(DIMt-wz
private void mergeSort(int[] data, int[] temp, int l, int r) { whW%c8
int i, j, k; ts:YJAu+F
int mid = (l + r) / 2; Jkx_5kk/\
if (l == r) r"_U-w
return; ^g'P H{68
if ((mid - l) >= THRESHOLD) 5i0vli/L
mergeSort(data, temp, l, mid); ]/#3 P
else yI{4h $c
insertSort(data, l, mid - l + 1); `o4%UkBpM
if ((r - mid) > THRESHOLD) ykS-5E`
mergeSort(data, temp, mid + 1, r); .A Dik}o
else *^3&Y@
insertSort(data, mid + 1, r - mid); JBI>D1`"
)MWbZAI
for (i = l; i <= mid; i++) { Fv} Uq\v[
temp = data; 8{- *Q(=/
} V;LV),R?
for (j = 1; j <= r - mid; j++) { &*Z"r*
temp[r - j + 1] = data[j + mid]; 8C=8Wjm
} u|+Dqe`
int a = temp[l]; 9dO. ,U*`
int b = temp[r]; Xk(p:^ R
for (i = l, j = r, k = l; k <= r; k++) { uPVO!`N3
if (a < b) { &SW~4{n:
data[k] = temp[i++]; ]<BT+6L
a = temp; c }7gHud
} else { 8U)*kmq
data[k] = temp[j--]; 1>=]lMW
b = temp[j]; zq'KX/o
} mhgvN-? "h
} WkMB
} Ew )1O9f
GUps\:ss
/** j a'_syn
* @param data 3kavzB[
* @param l `D? &)Y
* @param i Oj>;[O"
*/ cB6LJ}R
private void insertSort(int[] data, int start, int len) { A~@x8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ?$6(@>`f&t
} `hDH7u!U.
} w\1K.j=>|N
} \gGTkH
} )@],0yL
f2?01PM,Q
堆排序： UE-1p
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package org.rut.util.algorithm.support; }_oQg_-7e
'd]t@[#
import org.rut.util.algorithm.SortUtil; ,0@QBr5P
eWr2UXv$
/** pwVaSnre`
* @author treeroot l^2m7 7)
* @since 2006-2-2 =J`M}BBx
* @version 1.0 g*;zVi
*/ - WQ)rz
public class HeapSort implements SortUtil.Sort{ bh+m_$X~
XZ:6A]62I
/* (non-Javadoc) y9~:[jB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9vBW CCf
*/ };g<|v*o
public void sort(int[] data) { L=gG23U&
MaxHeap h=new MaxHeap(); lv#L+}T
h.init(data); "}2I0tM
for(int i=0;i h.remove(); *-&+;|mM
System.arraycopy(h.queue,1,data,0,data.length); _q}^#-
} Q[9W{l+
_~ 3r*j
private static class MaxHeap{ p2hPLq
zFr#j~L"
void init(int[] data){ v}.~m)
this.queue=new int[data.length+1]; Lb~' I=9D
for(int i=0;i queue[++size]=data; %GGSd0 g
fixUp(size); ]]T,;|B
} |<JBoE]3B
} MaZVGrcC
hVNT
private int size=0; ,MUgww!.
!`dMTW
private int[] queue; I7+yu>
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public int get() { Pk&$#J_
return queue[1]; jEm=A8q
} juQ?k xOB
yJdkDVxYr
public void remove() { h7PIF*7m e
SortUtil.swap(queue,1,size--); >$7{H]
fixDown(1); Hq|{Nt%Q
} }?*$AVs2q
file://fixdown 'VV"$`Fu"
private void fixDown(int k) { <CWOx&hr
int j; 2p~G][
while ((j = k << 1) <= size) { @2sr/gX^
if (j < size %26amp;%26amp; queue[j] j++; 71Y3.1+
if (queue[k]>queue[j]) file://不用交换 _ Gkb[H&RZ
break; U.1&'U*
SortUtil.swap(queue,j,k); v!#koqd1y.
k = j; _$yS4=.
} @v/ 8}n
} |`d-;pk!%
private void fixUp(int k) { 'M fVZho{
while (k > 1) { 8peK[sz
int j = k >> 1; 9O\yIL
if (queue[j]>queue[k]) /d>Jkv
break; *JO%.QNg
SortUtil.swap(queue,j,k); '`&b1Rc
k = j; G@U}4'V9
} 91UC>]}H
} $\L=RU!c}
j07b!j:"\}
} } a!HbH
cHJ4[x=
} L$?YbQo7
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SortUtil： 2>)::9e4
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package org.rut.util.algorithm; Ki(0s
IO"q4(&;P4
import org.rut.util.algorithm.support.BubbleSort; yY!@FGsA
import org.rut.util.algorithm.support.HeapSort; o4,9jk$
import org.rut.util.algorithm.support.ImprovedMergeSort; &(NW_<(
import org.rut.util.algorithm.support.ImprovedQuickSort; 'JJ :
import org.rut.util.algorithm.support.InsertSort; of>H&G)@
import org.rut.util.algorithm.support.MergeSort; B-wF1!Jv
import org.rut.util.algorithm.support.QuickSort; V=E5pB`Pr
import org.rut.util.algorithm.support.SelectionSort; Vg7BK%
import org.rut.util.algorithm.support.ShellSort; {*X|)nr
< fYcON
/** fz rH}^
* @author treeroot :MGIp%3
* @since 2006-2-2 oTveY
* @version 1.0 0+k=gO
*/ ~sTn?~
public class SortUtil { ootkf=
public final static int INSERT = 1; 1$ENNq#0
public final static int BUBBLE = 2; -Zqw[2Q4
public final static int SELECTION = 3; c@$W]o"A
public final static int SHELL = 4; L"}2Y3
public final static int QUICK = 5; S^r[%l<'n
public final static int IMPROVED_QUICK = 6; .]/k#Hv
public final static int MERGE = 7; ?}No'E1!I
public final static int IMPROVED_MERGE = 8; ygxaT"3"=
public final static int HEAP = 9; RggO|s+0;
|&~);>Cq2
public static void sort(int[] data) { wvH*<,8Vq
sort(data, IMPROVED_QUICK); '&Tz8.jp~
} nM`pnR_
private static String[] name={ 7lAnGP.;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" q5.5%W
}; ^geY Ay
FZN}T{<
private static Sort[] impl=new Sort[]{ 5G=fJAG
new InsertSort(), ZBjb f_M:
new BubbleSort(), O*9d[jw[
new SelectionSort(), IW=%2n(<1
new ShellSort(), &7KX`%K"D
new QuickSort(), rji<g>GQ
new ImprovedQuickSort(), j#9n.i %h
new MergeSort(), z=TuUl@
new ImprovedMergeSort(), v&xhS yZ
new HeapSort() zI_pP?4;.q
}; SA~oGgk=P
]C>h_,EZc
public static String toString(int algorithm){ nzKlue
return name[algorithm-1]; j^D/,SW
} 7 ;x to =
QPW+L*2
public static void sort(int[] data, int algorithm) { sbV_h;<
impl[algorithm-1].sort(data); g8]$BhRIfr
} 4qyPjAG
L]=LY
public static interface Sort { Z )X(
public void sort(int[] data); >n5Kz]]%
} l'?(4N
q ;e/gP2
public static void swap(int[] data, int i, int j) { @Dd3mWKq
int temp = data; 1+Bj` ACP
data = data[j]; YGZa##i
data[j] = temp; !uhh_3RH
} &izk$~
} p9eTrFDy?