[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; %y`7);.q
} yy2I2Bv
int i1=l; ` %?9=h%
int i2=mid+1; >^_ bD
for(int cur=l;cur<=r;cur++){ 2WBq
if(i1==mid+1) H7g< p"
data[cur]=temp[i2++]; !u;>Wyd W
else if(i2>r) i+vsp@d
data[cur]=temp[i1++]; u<tk G B
else if(temp[i1] data[cur]=temp[i1++]; ; y.E!
else \gO,hST
data[cur]=temp[i2++]; TH1B#Y#<J
} {rH9grb
} GG6%bF
edC4BHE
} kODK@w V-
n \G Ry'
改进后的归并排序: $1Nd_pD=
w!3>N"em
package org.rut.util.algorithm.support; (Xxn\*S
n&XGBwgW
import org.rut.util.algorithm.SortUtil; {1lO
0t.p1
/** -8Ti*:
* @author treeroot NucM+r1P
* @since 2006-2-2 +|RB0}hFS-
* @version 1.0 9s$U%F6}
*/ &eZfQ27$
public class ImprovedMergeSort implements SortUtil.Sort { 1cJsj
i u]&;
private static final int THRESHOLD = 10; tpf7_YP_!-
+C{p%`<
/* A}VYb:u/
* (non-Javadoc) 8HErE<_(
* Qo0H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r0dDHj~F
*/ 6L4$vJ
public void sort(int[] data) { M:SO2Czz
int[] temp=new int[data.length]; vA%^`5
mergeSort(data,temp,0,data.length-1); \F6LZZ2Lv
} j|_E$L A\
NYB[Zyp
private void mergeSort(int[] data, int[] temp, int l, int r) { 12`_;[37
int i, j, k; v> z@
int mid = (l + r) / 2; P&A|PY,P
if (l == r) pxINw>\Qv
return; 30cd| S?
if ((mid - l) >= THRESHOLD) &XLD S=j
mergeSort(data, temp, l, mid); ?w&SW{ I
else /X8<C=}
insertSort(data, l, mid - l + 1); Cpl;vQ
if ((r - mid) > THRESHOLD) ]`=X'fED
mergeSort(data, temp, mid + 1, r); ]Uc`J8p,
else 83ipf"]*
insertSort(data, mid + 1, r - mid); !fkep=
dj9?t
for (i = l; i <= mid; i++) { :Ao!ls'=
temp = data; @1RP/y%
} g[z.*y/
for (j = 1; j <= r - mid; j++) { -7]Xjb5
temp[r - j + 1] = data[j + mid]; )9nElb2
} YE+$H%Jl!
int a = temp[l]; OyG"1F
int b = temp[r]; \l#>dq"Y
for (i = l, j = r, k = l; k <= r; k++) { 0lk;F
if (a < b) { b!>\2DlyJ
data[k] = temp[i++]; D^F{uDlb
a = temp; 3TuC+'`G
} else { \k8rxW
data[k] = temp[j--]; keAcKhj
b = temp[j]; }E^S]hdvz
} X=X\F@V:u
} $ItF])Bj5N
} adEJk
q 2?X"!
/** 6vzk\n
* @param data \>/M .2
* @param l HRa@
* @param i rp34?/Nz
*/ &lc8G
private void insertSort(int[] data, int start, int len) { L):qu
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); LxN*)[Wb
} CZ{k@z`r
} `(4pu6uT
} XR+3j/zEQ
} +FFG#6e
4jmK].
堆排序： S5=Udd"
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package org.rut.util.algorithm.support; dWRrG-'
``Q2P%
import org.rut.util.algorithm.SortUtil; 7YIK9edP
D@YP7
/** p#8W#t$
* @author treeroot 3NK ^AaTK
* @since 2006-2-2 q`|CrOzO
* @version 1.0 < a rZbM
*/ &x:JD1T}
public class HeapSort implements SortUtil.Sort{ ztM<J+
l0]d
/* (non-Javadoc) ;."<m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) WT3gNNx|
*/ uYO|5a<f~
public void sort(int[] data) { rjA@U<o
MaxHeap h=new MaxHeap(); e,1u
h.init(data); @)YY\l#
for(int i=0;i h.remove(); &R-H"kK?
System.arraycopy(h.queue,1,data,0,data.length); h5%|meZQb
} .5HQ
<!^ [~`
private static class MaxHeap{ '{?C{MK3Q
YhKZ|@
void init(int[] data){ NY
this.queue=new int[data.length+1]; Ps[$.h
for(int i=0;i queue[++size]=data; eH>#6R1-
fixUp(size); "AueLl)
} c$E)P$<j
} `i!wq&1g7
P<dy3;
private int size=0; VkmRh,T
`\$8`Zb;
private int[] queue; H3/caN:
1cN')"
public int get() { VAQ)Hc]
return queue[1]; [.yJV`
} =5]n\"/
?^!,vh
public void remove() { nY-* i!H
SortUtil.swap(queue,1,size--); JyBp-ii
fixDown(1); FVWfDQ$&v
} [`fI:ao|
file://fixdown &vUq}r%P
private void fixDown(int k) { 'JmBh@A
int j; qojXrSb"y
while ((j = k << 1) <= size) { RNJFSD.
if (j < size %26amp;%26amp; queue[j] j++; Va<HU:<
if (queue[k]>queue[j]) file://不用交换 jRZ%}KX
break; 0NE{8O0;Fr
SortUtil.swap(queue,j,k); c-]fKj7
k = j; _ *(bmJM
} gvavs+H%
} cA`4:gp
private void fixUp(int k) { ~4#B'Gy[
while (k > 1) { z5cYyx r>
int j = k >> 1; &k>aP0k"
if (queue[j]>queue[k]) `$;+g ,
break; nL`9l1
SortUtil.swap(queue,j,k); I`B'1"{
k = j; iDb;_?
} xp \S2@<
} u</8w&!
%|Qw9sbd
} Y>6.t"?Q^
$n=lsDnhQ
} {")\0|2\x
|^n3{m
SortUtil： !>.vh]8g
nS.G~c|
package org.rut.util.algorithm; /MTf0^9
Fe=8O ^\
import org.rut.util.algorithm.support.BubbleSort; qt?*MyfV
import org.rut.util.algorithm.support.HeapSort; ?Hz2-Cn
import org.rut.util.algorithm.support.ImprovedMergeSort; &_-](w`
import org.rut.util.algorithm.support.ImprovedQuickSort; LK7Xw3
import org.rut.util.algorithm.support.InsertSort; , |E$'
import org.rut.util.algorithm.support.MergeSort; HxwlYx,4
import org.rut.util.algorithm.support.QuickSort; $xW**&
import org.rut.util.algorithm.support.SelectionSort; V^fV7hw<
import org.rut.util.algorithm.support.ShellSort; >l1r,/\\
x"B'zP
/** kToOIx
* @author treeroot bY8GA
* @since 2006-2-2 M?&zY "c
* @version 1.0 xF8S*,#,*
*/ I}0_nge
public class SortUtil { J1F{v)T'?
public final static int INSERT = 1; NP t(MFK\
public final static int BUBBLE = 2; b{[*N
public final static int SELECTION = 3; 4SVW/Zl.?
public final static int SHELL = 4; Di(9]:+
public final static int QUICK = 5; :b#%C pR
public final static int IMPROVED_QUICK = 6; QTJu7^O9
public final static int MERGE = 7; JJk#,AP
public final static int IMPROVED_MERGE = 8; a:!uORQby
public final static int HEAP = 9; pa/9F[
#gZ|T M/h
public static void sort(int[] data) { ~9M!)\~
sort(data, IMPROVED_QUICK); MiGcA EF;
} n'w,n1z7
private static String[] name={ @'jfKW
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -;c
}; 6SEltm(
yY=<'{!
private static Sort[] impl=new Sort[]{ c[(Pg%
new InsertSort(), n~r 9!m$<
new BubbleSort(), !vqC+o>@
new SelectionSort(), Jbw!:x [
new ShellSort(), HkjEiU
new QuickSort(), 'p}`i/
new ImprovedQuickSort(), dk5|@?pe
new MergeSort(), ]|oJ)5P
new ImprovedMergeSort(), .[pUuVq]
new HeapSort() F'W> 8
}; Hcv u7uD
4br6$
public static String toString(int algorithm){ U6j/BJT"
return name[algorithm-1]; ^X1wI9V
} &d^=siL
+<(a}6dt
public static void sort(int[] data, int algorithm) { &^QPkX@p
impl[algorithm-1].sort(data); AlX3Wv}
} :=!Mh}i
DdjCn`jqlf
public static interface Sort { 2<6j1D^jM
public void sort(int[] data); Z7#7N wy4
} Os&1..$Nb
H!eh J$[
public static void swap(int[] data, int i, int j) { ,x#ztdvr
int temp = data; McP.9v}H0_
data = data[j]; "sbBe73 m
data[j] = temp; Lo`F
} 4M`Xrfwm'[
} `iYc<N`