[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; AXyuXB
} SG~R!kN}Q
int i1=l; fKfi
int i2=mid+1; ,O2F}5|;
for(int cur=l;cur<=r;cur++){ ;23F8M%wH
if(i1==mid+1) /mb| %U]~
data[cur]=temp[i2++]; B 5?(gb"
else if(i2>r) 4&\m!s
data[cur]=temp[i1++]; R:E`
else if(temp[i1] data[cur]=temp[i1++]; 8wBns)wy@
else |^1eL I
data[cur]=temp[i2++]; jkbz8.K
} 6jn<YR E-
} [\!S-:
{E9Y)Z9
} |89`O^
u!Z&c7kPI
改进后的归并排序: 7 MfpZgC
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package org.rut.util.algorithm.support; 8S0)_L#S
w4OVfTlN
import org.rut.util.algorithm.SortUtil; K46\Rm_:B;
g$<@!
/** R}0cO^V
* @author treeroot S^_na]M"4
* @since 2006-2-2 ?0.+DB $
* @version 1.0 `);`E_'U k
*/ D@2Tx
public class ImprovedMergeSort implements SortUtil.Sort { xzy9~))o
kxKBI{L
private static final int THRESHOLD = 10; cv^^NgQ
`:8&m
/* W>"i0p
* (non-Javadoc) RGiA>Z:W
* Nk7Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eC1cE
*/ ?0%lB=qQ
public void sort(int[] data) { 39OZZaWL
int[] temp=new int[data.length]; *P_TG"^{W
mergeSort(data,temp,0,data.length-1); -X |G
} <'/+E4m
f[.]JC+,
private void mergeSort(int[] data, int[] temp, int l, int r) { ;a68>5Lm*
int i, j, k; 4Q$\hO3b
int mid = (l + r) / 2; F Hv|6zUX
if (l == r) `T-(g1:9
return; ?J>^X-z
if ((mid - l) >= THRESHOLD) 5!?><{k=%
mergeSort(data, temp, l, mid); 6Up,B=sX0
else w_9:gprf
insertSort(data, l, mid - l + 1); 5SDHZ?h
if ((r - mid) > THRESHOLD) j"c"sF\q
mergeSort(data, temp, mid + 1, r); r`" ?K]rI
else xbIxtZm
insertSort(data, mid + 1, r - mid); 2lGq6Au:
}C)
for (i = l; i <= mid; i++) { s|qB;
temp = data; N&=,)d~M
} 1{DHlyA6g
for (j = 1; j <= r - mid; j++) { )9Jt550(
temp[r - j + 1] = data[j + mid]; md<%Z4+
} 8zr)oQ:
int a = temp[l]; LaLA}1!
int b = temp[r]; G $?VYC8;
for (i = l, j = r, k = l; k <= r; k++) { d(h`bOjI
if (a < b) { ]e+S~me
data[k] = temp[i++]; ; LTc4t
a = temp; [u~#F,_ow
} else { 6N]v9uXZ
data[k] = temp[j--]; ^oA^z1>3
b = temp[j]; Ij#?r2Z%
} lT*Hj.
} %GAEZH,2sG
} n2$*Z6.G
*F&C`]
/** pTcm2-J
* @param data wJ+"JQY.J+
* @param l TVKuvKH8U
* @param i 5J 0
*/ [ h%ci3
private void insertSort(int[] data, int start, int len) { kRG-~'f%`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 37{mhU
} \p.ku%{
} $NqT={!
} MvObx'+
} lB,.TK
M@ mCBcbN
堆排序： KO:o GUR
h4ZrD:D0\
package org.rut.util.algorithm.support; BjJ+~R
cp[k[7XGD
import org.rut.util.algorithm.SortUtil; _t3n<
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/** w${=]h*2
* @author treeroot /f_lWr:9l
* @since 2006-2-2 kIM* K%L}
* @version 1.0 7j{SCE;
*/ J}lBKP:-*
public class HeapSort implements SortUtil.Sort{ Z5\u9E"]
Zs)HzOP)9
/* (non-Javadoc) kyz_r6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4K:p
*/ d&t|Y:,8
public void sort(int[] data) { AOhsat;O`
MaxHeap h=new MaxHeap(); p.&FK'&[0
h.init(data); 8L.Y0_x
for(int i=0;i h.remove(); ]M>mwnt+
System.arraycopy(h.queue,1,data,0,data.length); N3i}>Q)B
} 9V("K
{B uh5U,
private static class MaxHeap{ )9J&M6LX
'Aai.PE:
void init(int[] data){ t<x0?vfD
this.queue=new int[data.length+1]; d:Wh0y}
for(int i=0;i queue[++size]=data; @ScH"I];uA
fixUp(size); Id|38
} 1+v)#Wj
} ;L++H5Kz6
Kp8!^os
private int size=0; ;E(%s=i
<SbW QbN
private int[] queue; vfm|?\
pzHN:9r
public int get() { U!TFFkX[
return queue[1]; ma vc$!y
} 4Rp2
h@t&n@8O?
public void remove() { }n oI2.-#
SortUtil.swap(queue,1,size--); UC3?XoT\
fixDown(1); WTZP}p1
} j;)U5X
file://fixdown do C8!
private void fixDown(int k) { >kd&>)9v
int j; O8r9&Nv
while ((j = k << 1) <= size) { *EvnN:
if (j < size %26amp;%26amp; queue[j] j++; c{7!:hi`x
if (queue[k]>queue[j]) file://不用交换 %5NfF65'
break; TnCN2#BO
SortUtil.swap(queue,j,k); CFkM}`v0
k = j; *dL!)+:d
} E_MGejm@
} G(EiDo&
private void fixUp(int k) { SZea[~&
while (k > 1) { 1|Us"GQ(n
int j = k >> 1; &AG,]#
if (queue[j]>queue[k]) ?`3`azfM
break; *O+G}_}
SortUtil.swap(queue,j,k); ,?P@ :S<8
k = j; %70sS].@
} inBBU[Sl
} D}r,t_]Eb
bT2b)nf
} 2r^|
hqmKUlo
} V \,Z (
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SortUtil： mvyqCOp0
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package org.rut.util.algorithm; 4jfkCU
!Y8us"
import org.rut.util.algorithm.support.BubbleSort; d;daYjOm
import org.rut.util.algorithm.support.HeapSort; T&
import org.rut.util.algorithm.support.ImprovedMergeSort; 51u8.%{4
import org.rut.util.algorithm.support.ImprovedQuickSort; !U/iY%NE
import org.rut.util.algorithm.support.InsertSort; 6Xu8~%i
import org.rut.util.algorithm.support.MergeSort; N=YRYUo
import org.rut.util.algorithm.support.QuickSort; s+8 v7ZJ
import org.rut.util.algorithm.support.SelectionSort; q["CT&0
import org.rut.util.algorithm.support.ShellSort; $*tq$DZ4&
3M=ym.
/** R_e{H^pY^
* @author treeroot PMebn$(
* @since 2006-2-2 ^F"Q~?D)
* @version 1.0 u_[s+J/
*/ {L$]NQdz
public class SortUtil { Kz:g9
public final static int INSERT = 1; 5zWxI]4d\
public final static int BUBBLE = 2; }SR}ET&z
public final static int SELECTION = 3; u[$ \ az7
public final static int SHELL = 4; N{U``LV
public final static int QUICK = 5; Xt %;]1n
public final static int IMPROVED_QUICK = 6; \BOZhXfl'
public final static int MERGE = 7; '8R5?9"
public final static int IMPROVED_MERGE = 8; wuSp+?{5k
public final static int HEAP = 9; u=JI 1
.H {
public static void sort(int[] data) { Sp3?I2 o
sort(data, IMPROVED_QUICK); Av:5v3%
} {{7%z4l
private static String[] name={ a;jXMR
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /B73|KB+
}; vtM!?#
@-|{qP=Dy
private static Sort[] impl=new Sort[]{ +YVnA?r?
new InsertSort(), }J"}5O2,b
new BubbleSort(), ua#sW
new SelectionSort(), cLj@+?/
new ShellSort(), 484lB}H
new QuickSort(), TO7%TW{L
new ImprovedQuickSort(), @.T(\Dq^
new MergeSort(), `OO=^.-u
new ImprovedMergeSort(), @5+ JXD
new HeapSort() ]:m>pI*z.
}; eY^;L_7}p
MQ>.^]B]o
public static String toString(int algorithm){ {_ti*#
return name[algorithm-1]; ;$gZ?&
} 0vbiq
u;rK.3o
public static void sort(int[] data, int algorithm) { uKHkC.g
impl[algorithm-1].sort(data); }<6xZy
} m22M[L(q
a"uO0LOb
public static interface Sort { gmkD'CX*A
public void sort(int[] data); )y&}c7xW
} &"]Uh
!4cO]wh5
public static void swap(int[] data, int i, int j) { Ta^l1]9.*
int temp = data; chv0\k"'
data = data[j]; Z".mEF-b
data[j] = temp; !mLQdkTE
} o7Ms]AblT
} [zmx