[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; G7 1U7
} sa_R$ /H
int i1=l; u FMIY(vB
int i2=mid+1; DC&A1I&
for(int cur=l;cur<=r;cur++){ /@Ez" ?V2
if(i1==mid+1) >Z *iE"9"
data[cur]=temp[i2++]; b& V`<'{
else if(i2>r) yc*<:(p
data[cur]=temp[i1++]; >B0D/:R9
else if(temp[i1] data[cur]=temp[i1++]; |Dg;(i?
else {T&v2u#S
data[cur]=temp[i2++]; Y5HfN[u^7
} 5d+<EF+N
} 4_tR9w"
Yy]T J
} :v`o6x8
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改进后的归并排序: _WKJ<dB<
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package org.rut.util.algorithm.support; DMB"Y,
xS"$g9o0
import org.rut.util.algorithm.SortUtil; 5|{)Z]M%9
!L77y^oV
/** z/S,+!|z
* @author treeroot O7v]p
* @since 2006-2-2 R8tF/dx>7
* @version 1.0 .Y!:x=e
*/ oAY_sg+
public class ImprovedMergeSort implements SortUtil.Sort { _().t5<
r:-WzH(Ms
private static final int THRESHOLD = 10; NH'iR!iGo
mG_BM/$
/* GJX4KA8J
* (non-Javadoc) Y&s2C%jT
* `|]e6Pb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }'lNi^"XL
*/ Q!K`e)R
public void sort(int[] data) { [G a~%m
int[] temp=new int[data.length]; &eIGF1ws
mergeSort(data,temp,0,data.length-1); m=QCG)s
} ,>u=gA&}
J^fm~P>.
private void mergeSort(int[] data, int[] temp, int l, int r) { H>?F8R_iq
int i, j, k; >\ZR*CS
int mid = (l + r) / 2; k5@d! }#c
if (l == r) E:FO_R(Xq
return; 8Y#bN*!
if ((mid - l) >= THRESHOLD) {rC~P
mergeSort(data, temp, l, mid); S8%n.<OB
else kg3ppt
insertSort(data, l, mid - l + 1); h~w4, T
if ((r - mid) > THRESHOLD) |z~LzSJv
mergeSort(data, temp, mid + 1, r); &3Tx@XhO
else RlsVC_H\
insertSort(data, mid + 1, r - mid); 6 mO"
|) Pi6Y
for (i = l; i <= mid; i++) { t8&q9$
temp = data; Jf)3< ~G
} :tM?%=Q
for (j = 1; j <= r - mid; j++) { TFy7HX\Oq
temp[r - j + 1] = data[j + mid]; F6W}mMZH/N
} Pd~MiyO;K
int a = temp[l]; 2J<&rKCF
int b = temp[r]; hmZvIy(
for (i = l, j = r, k = l; k <= r; k++) { yG&2UqX
if (a < b) { S$eDnw~$
data[k] = temp[i++]; u g\w\b
a = temp; Kd3QqVJBz1
} else { :Q_x/+-
data[k] = temp[j--]; {B0h+. C
b = temp[j]; JRO$<
} pUCK-rL
} (KTnJZ
} ioV_oR9I
<C<`J{X0
/** iq6a|XGi
* @param data EA|k5W*b
* @param l (R'+jWH
* @param i Fk1.iRVzi
*/ |;u}sX1t9
private void insertSort(int[] data, int start, int len) { s-k_d<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); z<pJYpxH
} \cQ .|S
} R#(G%66
} 4DLq}v
} zX kx7d8
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堆排序： ++8_fgM
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package org.rut.util.algorithm.support; +;q.Y?
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import org.rut.util.algorithm.SortUtil; xd8 *<,Wj
)ofm_R'q*
/** #tjmWGo,
* @author treeroot t`G)b&3_O
* @since 2006-2-2 :eOR-}p'
* @version 1.0 nrpI5t.b
*/ M3pjXc<O
public class HeapSort implements SortUtil.Sort{ f vLC_'M
*Msr15
/* (non-Javadoc) Dag`>|my
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6T+
*/ GK{{7B
public void sort(int[] data) { RY=1H
MaxHeap h=new MaxHeap(); b2kWjg.4
h.init(data); 1f4bt6[
for(int i=0;i h.remove(); ;/LD)$_
System.arraycopy(h.queue,1,data,0,data.length); u+D[_yd^
} x*}bo))hb
}!)F9r@\
private static class MaxHeap{ =Q(vni83<
DjHp+TyT
void init(int[] data){ 8)xt(~qF
this.queue=new int[data.length+1]; ~rv})4h
for(int i=0;i queue[++size]=data; $/_qE
fixUp(size); 0a2@b"l
} cDV^8 R
} $h28(K%
"0&N}
private int size=0; op7FZHs
UG2w 1xqHw
private int[] queue; lBA+zZ
NY.k.
public int get() { <]G${y*;
return queue[1]; t FgX\4
} n56;m`IU
I*\^,ow
public void remove() { mlu 3K
SortUtil.swap(queue,1,size--); ~ 3T,&?r
fixDown(1); &L4 q10-N
} .px:e)iW
file://fixdown ULBg{e?l8
private void fixDown(int k) { UQT'6* !
int j; .q;ED`G
while ((j = k << 1) <= size) { Hl7:*]l7b
if (j < size %26amp;%26amp; queue[j] j++; 0ys~2Y!eH
if (queue[k]>queue[j]) file://不用交换 1 W'F3
break; >V;,#5F_
SortUtil.swap(queue,j,k); qv+R:YYOq
k = j; Bjj<\8^M
} UUtbD&\
} NZXjE$<Vr
private void fixUp(int k) { Lz4ehWntO
while (k > 1) { Bw<rp-
int j = k >> 1; Z1,gtl ?
if (queue[j]>queue[k]) Hs0pW5oZ
break; >q7 %UK]&
SortUtil.swap(queue,j,k); 68t}w^=
k = j; j+^L~, S
} )\0F7Z
} c[cAUsk i
:q+N&j'3
} uS5o?fg\e
j9y3hQ+q
} ?IYY'fS"
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SortUtil： G'#41>q+
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package org.rut.util.algorithm; l]#!+@
c^.l2Q!
import org.rut.util.algorithm.support.BubbleSort; 8i0
import org.rut.util.algorithm.support.HeapSort; Y=B3q8l5
import org.rut.util.algorithm.support.ImprovedMergeSort; yA7)Y})>
import org.rut.util.algorithm.support.ImprovedQuickSort; 5lmO:G1
import org.rut.util.algorithm.support.InsertSort; g-)mav
import org.rut.util.algorithm.support.MergeSort; cT'w=
import org.rut.util.algorithm.support.QuickSort; fCUT[d+H
import org.rut.util.algorithm.support.SelectionSort; [Ot,q/hBJ
import org.rut.util.algorithm.support.ShellSort; 3]LN;s]ac
JW+*d`8Z[
/** (> "QVxr
* @author treeroot ^toAw8A=@0
* @since 2006-2-2 JMyTwj[7
* @version 1.0 f3PMVf:<
*/ z&+ zl6
public class SortUtil { d;G~hVu
public final static int INSERT = 1; m(47s
public final static int BUBBLE = 2; 3h=8"lRc
public final static int SELECTION = 3; "pvZ,l>8f
public final static int SHELL = 4; mLwY]2T"
public final static int QUICK = 5; $H2GbZ-I
public final static int IMPROVED_QUICK = 6; @}LZ! y
public final static int MERGE = 7; KL3<Iz]
public final static int IMPROVED_MERGE = 8; ]]uHM}l
public final static int HEAP = 9; l";'6;g
L-h$Z0]_F
public static void sort(int[] data) { &Cro2|KZhG
sort(data, IMPROVED_QUICK); zg}YGu|J
} 1'KishHK=
private static String[] name={ YUkud2,j
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?y7w}W
}; 3<(q }
>Hwc,j q
private static Sort[] impl=new Sort[]{ LtKB v4
new InsertSort(), @h?crJ6$
new BubbleSort(), &a)vdlZSE=
new SelectionSort(), kU*{4G|6
new ShellSort(), 0Xl%uF+w
new QuickSort(), \cySWP[
new ImprovedQuickSort(), 'fW#7W
new MergeSort(), Ka-p& Uv1<
new ImprovedMergeSort(), `~F5wh~
new HeapSort() lF4u{B9DM
}; i g71/'D
X>l*v\F9
public static String toString(int algorithm){ G*n2Ii
return name[algorithm-1]; j$@tK0P
} `rFAZcEj%
mP}#Ccji?
public static void sort(int[] data, int algorithm) { ;5S}~+j
impl[algorithm-1].sort(data); %%}A|,
} ^gR+S
]qktj=p
public static interface Sort { l\Ftr_Dk
public void sort(int[] data); =!.mGW-Q}
} (Wj2?k/]
-G`.y?
public static void swap(int[] data, int i, int j) { n9UKcN-
int temp = data; $&{IKP)u
data = data[j]; X"*^l_9-v
data[j] = temp; 8<&EvOk
} 2[R$RpA_
} 3#GqmhqKDk