[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; G2Qjoe`Uc
} DZ`k[Z.VZ
int i1=l; :F(9"L
int i2=mid+1; LJuW${Y
for(int cur=l;cur<=r;cur++){ 8C&x MA^
if(i1==mid+1) 9C}qVoNu
data[cur]=temp[i2++]; &"S/Lt
else if(i2>r) ?S`>>^
data[cur]=temp[i1++]; \9m*(_Qf
else if(temp[i1] data[cur]=temp[i1++]; /=T"=bP#/
else L]-w;ll-
data[cur]=temp[i2++]; ;iX<`re~
} x mo&![P
} 3)E(RyQA3
*g7DPN$aQ
} gY5l.&
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改进后的归并排序: ;sQbn|=e"
@EZ>f5IO+
package org.rut.util.algorithm.support; C3"&sdLb$
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import org.rut.util.algorithm.SortUtil; gA:TL{X0
bx;f`8SN
/** tbur$00
* @author treeroot {*xBm#
* @since 2006-2-2 ejcwg*i
* @version 1.0 3wt
*/ (2txM"Dja
public class ImprovedMergeSort implements SortUtil.Sort { PZOORjF8A
~"7J}[i5
private static final int THRESHOLD = 10; fPQ|e"?
F=Y S^
/* )/Y~6A9>
* (non-Javadoc) f%Ke8'&
* UxqWnHH.`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q1V2pP+=@
*/ /~hbOs/ L
public void sort(int[] data) { 2VYvO=KA
int[] temp=new int[data.length]; UKs$W`
mergeSort(data,temp,0,data.length-1); g [L
} htHv&
TA;,>f*
private void mergeSort(int[] data, int[] temp, int l, int r) { ]N}]d +^6
int i, j, k; Q_}n%P:u
int mid = (l + r) / 2; j jY{Uq
if (l == r) 9q|7<raS
return; P\(30
if ((mid - l) >= THRESHOLD) LknVqZ|k
mergeSort(data, temp, l, mid); iZTa>@
else yYX :huw
insertSort(data, l, mid - l + 1); <Cq"| A
if ((r - mid) > THRESHOLD) Z<]VTo
mergeSort(data, temp, mid + 1, r); ua#K>sur.
else `]>on`n?
insertSort(data, mid + 1, r - mid); VO-784I
qZsnd7o{l.
for (i = l; i <= mid; i++) { VkXn8J
temp = data; w%u5<
} n-OWwev)
for (j = 1; j <= r - mid; j++) { .<w)Bmh
temp[r - j + 1] = data[j + mid]; !sK#zAR2
} DQ_ 2fX~)
int a = temp[l]; !R{em48D
int b = temp[r]; r$DZkMue
for (i = l, j = r, k = l; k <= r; k++) { BE4\U_]a3
if (a < b) { NbDda/7ki
data[k] = temp[i++]; ZNy9_a:dX
a = temp; I9/KM4&
} else { %UG/ak%z
data[k] = temp[j--]; )E~mJln
b = temp[j]; taV|YP$
} F@^N|;_2
} PP4d?+;V
} 5"2@NL
=1Sy@MbH3
/** MBO,\t.
* @param data ;tr)=)q&
* @param l Rp4FXR jC
* @param i gMay
*/ 9:\A7 =
private void insertSort(int[] data, int start, int len) { DpNX66O
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); O3xz|&xY&
} m)k-uWc$C
} I}%mfojC
} }K;iJ~kD1
} %&1$~m0
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堆排序： hg&u0AQ2
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package org.rut.util.algorithm.support; gix>DHq$k
pXNtN5@FQ
import org.rut.util.algorithm.SortUtil; Cz[5Ug'V
~Jxlj(" 0(
/** B3.X}ys#
* @author treeroot `&,_xUA
* @since 2006-2-2 /J.0s0@
* @version 1.0 (zEYpTp
*/ |rFJ*.nD
public class HeapSort implements SortUtil.Sort{ i&pMF O
Ej5^Y ?-6
/* (non-Javadoc) #:I^&~:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !p"Kd ~
*/ (xQI($Wq*M
public void sort(int[] data) { fv/v|
MaxHeap h=new MaxHeap(); -s33m]a;
h.init(data); <>?^4NC<M
for(int i=0;i h.remove(); L:^Y@[f
System.arraycopy(h.queue,1,data,0,data.length); QU%N*bFW%P
} Ks51:M
'Ye]eL,I\
private static class MaxHeap{ F]0Jwm{
WS5"!vz
void init(int[] data){ -BjEL;
this.queue=new int[data.length+1]; /rOnm=P+Q
for(int i=0;i queue[++size]=data; Y`q!V=
fixUp(size); w&9F>`VET
} d(\1 }l
} m]e0X*Kg
vj(@.uU)
private int size=0; sgD@}":m
@21u I{
private int[] queue; L*IU0Jy>
+Bn?-{h=
public int get() { nE^wxtY
return queue[1]; k=FcPF"
} pBvo M={2!
W*3o|x
public void remove() { DWdLA~'t
SortUtil.swap(queue,1,size--); JqQ3C}z
fixDown(1); a0)vvo=bz
} &'NQ)Dn
file://fixdown %qONJP
private void fixDown(int k) { )v};C<
int j; "wF*O"WQo
while ((j = k << 1) <= size) { L2k;f]
if (j < size %26amp;%26amp; queue[j] j++; {.cB>L
if (queue[k]>queue[j]) file://不用交换 >*Sv0#
break; )'w]YIv9
SortUtil.swap(queue,j,k); @ljZw(
k = j; U:J /\-
} ]m RF[b$
} }@3$)L%n_u
private void fixUp(int k) { :^K~t!@
while (k > 1) { %odw+PhO
int j = k >> 1; xL|?(pQ/BK
if (queue[j]>queue[k]) Mi<*6j0
break; i4 P$wlO
SortUtil.swap(queue,j,k); =SA 4\/
k = j; Bk@bN~B4
} |%n|[LP'
} 3SmqXPOw
7Zhli Y1
} |_!PD$i-
{6ajsy5=
} 9'D8[p%
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SortUtil： zj%cd;
9]"\"ka3>
package org.rut.util.algorithm; bx1G CD
pVdhj^n
import org.rut.util.algorithm.support.BubbleSort; kWI]fZ_n
import org.rut.util.algorithm.support.HeapSort; U9bFUK/z
import org.rut.util.algorithm.support.ImprovedMergeSort; kVy"+ZebK
import org.rut.util.algorithm.support.ImprovedQuickSort; >>/nuWdpO
import org.rut.util.algorithm.support.InsertSort; "sC$%D<oc
import org.rut.util.algorithm.support.MergeSort; \?J=mE@;1
import org.rut.util.algorithm.support.QuickSort; _CHKh*KHML
import org.rut.util.algorithm.support.SelectionSort; t!NrB X
import org.rut.util.algorithm.support.ShellSort; (q055y
k&n\ =tKN
/** 4U_rB9K$
* @author treeroot o-~-F+mj#
* @since 2006-2-2 gGF$M `
* @version 1.0 ^.nwc#
*/ ?SBh^/zf
public class SortUtil { Kw)C{L5a
public final static int INSERT = 1; w;@`Yi.WQ
public final static int BUBBLE = 2; goG]WGVr
public final static int SELECTION = 3; bDxPgb7N=
public final static int SHELL = 4; 1OuSH+
public final static int QUICK = 5; ^Z#<tN;
public final static int IMPROVED_QUICK = 6; ]%b0[7[
public final static int MERGE = 7; ?U7&R%Lh`
public final static int IMPROVED_MERGE = 8; n\~"Wim<b
public final static int HEAP = 9; }S Y`KoC1
ag|9$
public static void sort(int[] data) { BF@m)w.v
sort(data, IMPROVED_QUICK); F^4*|g
} KB$ vQ@N
private static String[] name={ ;""-[4C
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" fJ,8g/f8
}; F[Qsv54
C6Um6X9/i
private static Sort[] impl=new Sort[]{ ZS07_6.~
new InsertSort(), g`y/_
new BubbleSort(), b#bO=T$e-
new SelectionSort(), 89 _&X[X
new ShellSort(), #MmmwPB_
new QuickSort(), J$o[$G_Z
new ImprovedQuickSort(), 1',+&2)oj
new MergeSort(), k i~Raa/e
new ImprovedMergeSort(), ":5~L9&G
new HeapSort() VKl~oFKXJ
}; HJ2O@e
h5h-}qBA
public static String toString(int algorithm){ 1"87EP
return name[algorithm-1]; _Eet2;9
} C`=`Ce~|d
3/]f4D{MMY
public static void sort(int[] data, int algorithm) { -K{\S2
impl[algorithm-1].sort(data); #$9U=^Z[
} 2nOe^X!*
9&?tQ"@x
public static interface Sort { ^v()iF !
public void sort(int[] data); \J#I}-a&j
} ^/4{\3
?,A8 fR
public static void swap(int[] data, int i, int j) { n=<q3}1Jej
int temp = data; ,58kjTM
data = data[j]; 'dd<<E
data[j] = temp; XmE_F
} ]}*G[[ ^p
} +LvZ87O^~