[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; JwN}Jm
} #d}0}7ue
int i1=l; 4o1Q7
int i2=mid+1; Q `e~MD
for(int cur=l;cur<=r;cur++){ >:w?qEaE
if(i1==mid+1) c8^+^.=pX
data[cur]=temp[i2++]; tyc8{t#Z
else if(i2>r) WW@JVZxK
data[cur]=temp[i1++]; (w5u*hx
else if(temp[i1] data[cur]=temp[i1++]; |Hx%f
else =8$|_
data[cur]=temp[i2++]; m.1LxM$8
} gIV3n#-{L
} D+| K%_Qq
x2 w8zT6M
} R'*<A3^
jo 7Hyw!g
改进后的归并排序: aqcFY8b '
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package org.rut.util.algorithm.support; u/z,92mmS
8ku? W
import org.rut.util.algorithm.SortUtil; ??|d=4g\
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/** ((Vj]I% ;
* @author treeroot Hfh@<'NL]
* @since 2006-2-2 x1|Da$2
* @version 1.0 ;V|M3
*/ l%^h2 o
public class ImprovedMergeSort implements SortUtil.Sort { $cRcap
[Z#+gh
private static final int THRESHOLD = 10; GLo\q:5A
0L!er%GM
/* 4fu'QZ(}
* (non-Javadoc) $a`J(I
* z[WC7hvU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fm3(70F\
*/ J)-T:.i|0
public void sort(int[] data) { ?F!EB4E\y}
int[] temp=new int[data.length]; ^dFhg_GhF
mergeSort(data,temp,0,data.length-1); s9uL<$,'
} C}n'>],p
hmc\|IF`
private void mergeSort(int[] data, int[] temp, int l, int r) { 9uuta4&uI
int i, j, k; 5gO/-Zj
int mid = (l + r) / 2; %l Q[dXp
if (l == r) J$1j-\KS
return; CkRyzF
if ((mid - l) >= THRESHOLD) [?;`x&y~y
mergeSort(data, temp, l, mid); ^Ku\l #B
else ~RcNZ\2y
insertSort(data, l, mid - l + 1); VT'0DQ!NIq
if ((r - mid) > THRESHOLD) o^6jyb!j
mergeSort(data, temp, mid + 1, r); 4uFIpS|rq
else 3Z_t%J5QZ$
insertSort(data, mid + 1, r - mid); $8jaapNm@
j%#?m2J}
for (i = l; i <= mid; i++) { P;j&kuW|zL
temp = data; :lgHL3yl
} EC<5M5Lc
for (j = 1; j <= r - mid; j++) { $kD7y5
temp[r - j + 1] = data[j + mid]; EY So=
} ]PeLcB
int a = temp[l]; ^&C&~}Zv
int b = temp[r]; uK"^*NEC';
for (i = l, j = r, k = l; k <= r; k++) { 3.(.*>
if (a < b) { Hr(6TLNw
data[k] = temp[i++]; | @uq()
a = temp; DYc.to-
} else { 9~=gwP
data[k] = temp[j--]; 4S'[\ZJO
b = temp[j]; E3y6c)<
} U?^OD
} lco~X DI
} -&@]M>r@
IDj_l+?c
/** p`\3if'
* @param data cvhlRI%6
* @param l _8al
* @param i A_@I_V$
*/ FH4u$g+
private void insertSort(int[] data, int start, int len) { a|U}Ammr
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); I=U+GY:
} ]y.Rg{iv
} VF\{ra;
} l`DtiJ?$$0
} Y=9qJ`q
]Qd{ '}+
堆排序： dl:-k r8
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package org.rut.util.algorithm.support; 5bXHz5i
r)Or\HL
import org.rut.util.algorithm.SortUtil; `Uv)Sf{
DTPay1]6
/** 8}bZ[
* @author treeroot -H`\? R
* @since 2006-2-2 ]\7lbLv
* @version 1.0 9MT? .q
*/ [$^A@bqk
public class HeapSort implements SortUtil.Sort{ s\_l=v3
`{DG;J03[
/* (non-Javadoc) yji>*XG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?<! nm&~
*/ =9^Q"t4
public void sort(int[] data) { F,Q?s9s
MaxHeap h=new MaxHeap(); R'L?Xn}3
h.init(data); {H+?z<BF<
for(int i=0;i h.remove(); J,RDTXqn
System.arraycopy(h.queue,1,data,0,data.length); !I~C0u
} n3'dLJH|
Ey'J]KVW
private static class MaxHeap{ Vd21,~^>g
sllzno2bU
void init(int[] data){ ]dq5hkjpU
this.queue=new int[data.length+1]; 8-ZUS|7B
for(int i=0;i queue[++size]=data; @^'$r&M
fixUp(size); wDMjk2YN
} Ssw&'B|o
} +tIz[+u
Nl {7
private int size=0; V'j@K!)~xR
9_GokU P_
private int[] queue; yQ'eu;+]
-3` "E%9
public int get() { N};t<Xev
return queue[1]; qJ 95
} BMpF02Y|4
M'DWu|dIBA
public void remove() { sXiv,
SortUtil.swap(queue,1,size--); * MEe,4
fixDown(1); e{0L%%2K
} x~EKGoz3
file://fixdown Rjq a_hxrS
private void fixDown(int k) { %J _ymJ'pd
int j; i|S:s
while ((j = k << 1) <= size) { g,=^'D
if (j < size %26amp;%26amp; queue[j] j++; b~*i91)\
if (queue[k]>queue[j]) file://不用交换 F?cq'd
break; 5/ * >v
SortUtil.swap(queue,j,k); VRF6g|0;
k = j; L%XXf3;c
} ` 5#hjLe
} ~p\n&{P0
private void fixUp(int k) { rGQ5l1</
while (k > 1) { @;;G88=
int j = k >> 1; )&,K94
if (queue[j]>queue[k]) doM?8C#`
break; 1A^1@^{m'
SortUtil.swap(queue,j,k); [zQWyDu
k = j; T9?54r
} 3 z=\.R
} =JW[pRI5a
AWT"Y4Ie
} U<[jT=L
Oc~aW3*A(
} B6MkF"J<
M&f#wQ
SortUtil： w12}Rn8
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package org.rut.util.algorithm; W$'0Dc
8+>\3j
import org.rut.util.algorithm.support.BubbleSort; hVM2/j
import org.rut.util.algorithm.support.HeapSort; r|fO7PD
import org.rut.util.algorithm.support.ImprovedMergeSort; 5)`h0TK
import org.rut.util.algorithm.support.ImprovedQuickSort; ('4wXD]C
import org.rut.util.algorithm.support.InsertSort; ,9\Snn
import org.rut.util.algorithm.support.MergeSort; K6B4sE
import org.rut.util.algorithm.support.QuickSort; 8teJ*sz
import org.rut.util.algorithm.support.SelectionSort; .YR8v1Cp
import org.rut.util.algorithm.support.ShellSort; 'I v_mig
6,+nRiZ
/** B |&F%P0:
* @author treeroot a$$ Wt<&Y
* @since 2006-2-2 QPs:RhV7
* @version 1.0 [7.agI@=
*/ CTp!di|
public class SortUtil { 7$7n71o
public final static int INSERT = 1; H\#:,s{1
public final static int BUBBLE = 2; ")%r}:0
public final static int SELECTION = 3; [!~}S
public final static int SHELL = 4; ){ gAj
public final static int QUICK = 5; M{E{NK
public final static int IMPROVED_QUICK = 6; NXI[q'y
public final static int MERGE = 7; hcyO97@r
public final static int IMPROVED_MERGE = 8; S-!=NX&C
public final static int HEAP = 9; "SR5wr
[PWL<t::c
public static void sort(int[] data) { 6/1$<!WH
sort(data, IMPROVED_QUICK); V`bs&5#Sx
} si(cOCj/
private static String[] name={ 7ZsA5%s=,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -DCa
}; 4pPI'd&/7
e_rzA
private static Sort[] impl=new Sort[]{ S4bBafj[I
new InsertSort(), %4,?kh``D
new BubbleSort(), m|F:b}0Hb
new SelectionSort(), wz=z?AZW
new ShellSort(), P1V1as
new QuickSort(), ;#/0b{XFj
new ImprovedQuickSort(), S GM!#K
new MergeSort(), 78]gtJ
new ImprovedMergeSort(), &{z<kmc$6
new HeapSort() P^i.La,
}; E\$C/}T
S_\ F
public static String toString(int algorithm){ Cj^{9'0
return name[algorithm-1]; iM5vrz`n
} 9Cvn6{
X+l'bp]Ry
public static void sort(int[] data, int algorithm) { c1%rV`)]
impl[algorithm-1].sort(data); _|zBUrN
} 62\&RRB i
XYfv(y
public static interface Sort { %|+E48
public void sort(int[] data); @cv{rr
} ST;t, D:
&&7r+.Y
public static void swap(int[] data, int i, int j) { Oy_c
int temp = data; j@| `f((4
data = data[j]; Eju~}:Lo
data[j] = temp; WG5W0T_
} M_|> kp
} !w2gGy:I>