[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; mRfF)
} {Ca#{LeLk
int i1=l; sKjg)3Sl
int i2=mid+1; nb'],({:9
for(int cur=l;cur<=r;cur++){ Qo)>i0
if(i1==mid+1) UX2`x9
data[cur]=temp[i2++]; sh}=#eb
else if(i2>r) Dw;L=4F |
data[cur]=temp[i1++]; }RG
else if(temp[i1] data[cur]=temp[i1++]; @?*26}qp
else D4n~2]
data[cur]=temp[i2++]; ]Rnr>_>x;
} <JYV G9s}
} :(A]Bm3
rN$_(%m_N
} $CHri|
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改进后的归并排序: bbiDY
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package org.rut.util.algorithm.support; ;% !'K~
nd_d tsp#
import org.rut.util.algorithm.SortUtil; GRO[&;d`
OMO.-p
/** u Dm=W36
* @author treeroot SMqJMirR
* @since 2006-2-2 .0.Ha}{6b
* @version 1.0 +Medu?K `
*/ |nz,srr~
public class ImprovedMergeSort implements SortUtil.Sort { Gnj|y?'
gjL>FOe8u
private static final int THRESHOLD = 10; lXW.G
(Pc:A!}
/* *"O7ml]
* (non-Javadoc) ./[%%"
* O)`R)MQ)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2@:Go`mg
*/ 5"^$3&)
public void sort(int[] data) { l5D8DvJCj
int[] temp=new int[data.length]; #Cvjv; QwY
mergeSort(data,temp,0,data.length-1); vy1:>N?#5
} JL`n12$m
gAgzM?A1(
private void mergeSort(int[] data, int[] temp, int l, int r) { ,V.X-`Y
int i, j, k; :s$ rD
int mid = (l + r) / 2; 0z_e3H{P27
if (l == r) =4m?RPb~b
return; JQi)6A?J
if ((mid - l) >= THRESHOLD) ggJn oL
mergeSort(data, temp, l, mid); O|?>rK
else jUI'F4.5x-
insertSort(data, l, mid - l + 1); wb.47S8
if ((r - mid) > THRESHOLD) !m'lOz
mergeSort(data, temp, mid + 1, r); MY4cMMjp~
else zg0)9br
insertSort(data, mid + 1, r - mid); P8).Qn
Kt;h'?
for (i = l; i <= mid; i++) { _CciU.1k&,
temp = data; 536H*HdN
} x<~ pqq8]
for (j = 1; j <= r - mid; j++) { j2=jD G
temp[r - j + 1] = data[j + mid]; b,]hX
} ^4_.5~(
int a = temp[l]; j1Q G-Rs&
int b = temp[r]; o.keM4OQ
for (i = l, j = r, k = l; k <= r; k++) { +/-#yfn!TR
if (a < b) { NK$k9,
data[k] = temp[i++]; : JD%=w_
a = temp; k)1K6ug
} else { j0Kj>
data[k] = temp[j--]; m/Q@-
b = temp[j]; [- a2<E
} %'%ej^s-R
} /al(=zf
} GTeFDm;T^
pD eqBO
/** bezT\F/\
* @param data @F+4 NL-'P
* @param l QDF1$,s4i
* @param i .`)\GjDv
*/ &Op, ?\
private void insertSort(int[] data, int start, int len) { 6 GO7[?U<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }'b3'/MJ
} -shS?kV
} 6p1\#6#@
} (I IPrW;>
} mawomna
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堆排序： |ITp$_S
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package org.rut.util.algorithm.support; <IC=x(T
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import org.rut.util.algorithm.SortUtil; 1y2D]h/'
lF2im5nZ?
/** |h\e(_G\
* @author treeroot 'nz;|6uC
* @since 2006-2-2 0~iC#lHO
* @version 1.0 hq6B pE
*/ r`qMif'
public class HeapSort implements SortUtil.Sort{ .0:BgM
-icOg6%
/* (non-Javadoc) Kyt.[" p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yM}}mypS
*/ <Bn^+u\
public void sort(int[] data) { *p`0dvXG2
MaxHeap h=new MaxHeap(); AjKP -[
h.init(data); J*o:RnB
for(int i=0;i h.remove(); y>Zvose
System.arraycopy(h.queue,1,data,0,data.length); e6z;;C@'G
} lM86 *g 'l
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private static class MaxHeap{ m4bfW
h$F;=YS
void init(int[] data){ o@>{kzCx
this.queue=new int[data.length+1]; 9f+|m9~2
for(int i=0;i queue[++size]=data; w<3}(1
fixUp(size); ZM K"3c9
} ^1s!OT Is
} Zf68EB
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private int size=0; }__g\?Yf
bE#=\kf|
private int[] queue; (~:k70V5
*%l&'+
public int get() { zpV@{%VSj
return queue[1]; x%23oPM
} `zGK$,[%
3$ cDC8
public void remove() { %Koc^ pb)
SortUtil.swap(queue,1,size--); J]UlCg
fixDown(1); %_0,z`f
} bj\v0NKN4
file://fixdown {_0Efc=7
private void fixDown(int k) { WMnR+?q
int j; JZQkr
while ((j = k << 1) <= size) { ] e!CH <N
if (j < size %26amp;%26amp; queue[j] j++; c9-$td&
if (queue[k]>queue[j]) file://不用交换 f{xR s-u]
break; EAn}8#r'(8
SortUtil.swap(queue,j,k); >y mMQEX`
k = j; U_v{Vs
} )67_yHW
} `au(' xi<
private void fixUp(int k) { z`qBs
while (k > 1) { \kqa4{7U(
int j = k >> 1; !8yw!hA
if (queue[j]>queue[k]) CP_ ?DyWU
break; .281;] =
SortUtil.swap(queue,j,k); P*oKcq1R
k = j; j}uFp|df<
} ,B%M P<Rz1
} xB_F?d40T5
Zx,R6@l
} E{kh)-
AWHB^}!}
} e:hkWcV
m(>_C~rGN
SortUtil： gvvl3`S{
zvf:*Na")
package org.rut.util.algorithm; ;F9<Yv
b}S}OW2
import org.rut.util.algorithm.support.BubbleSort; |Ak>kQJ(1z
import org.rut.util.algorithm.support.HeapSort; eZWN9#p2
import org.rut.util.algorithm.support.ImprovedMergeSort; M[$(Pu
import org.rut.util.algorithm.support.ImprovedQuickSort; Qna ^Ry?6)
import org.rut.util.algorithm.support.InsertSort; !-b4@=f:
import org.rut.util.algorithm.support.MergeSort; ,cPNZ-%
import org.rut.util.algorithm.support.QuickSort; mt3j- Mw
import org.rut.util.algorithm.support.SelectionSort; La48M'u
import org.rut.util.algorithm.support.ShellSort; J;h4)w~9H3
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/** Gc>bli<-
* @author treeroot LWHP31{R
* @since 2006-2-2 5%"${ywI
* @version 1.0 ?z%@;&
*/ 9 P_`IsVK
public class SortUtil { hO(8v&ns3
public final static int INSERT = 1; lA {
public final static int BUBBLE = 2; s:lar4>kM
public final static int SELECTION = 3; ]2(vO0~
public final static int SHELL = 4; _ vVw2HH
public final static int QUICK = 5; rGuhYYvK
public final static int IMPROVED_QUICK = 6; []:;8fY
public final static int MERGE = 7; h^^zR)EVb
public final static int IMPROVED_MERGE = 8; 4[a?..X
public final static int HEAP = 9; e`k6YO
fL.;-
public static void sort(int[] data) { =MDir$1Z
sort(data, IMPROVED_QUICK); zIt-mU
} U^vQr%ha
private static String[] name={ s^ rO I~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Nv "R'Pps
}; *vv<@+gA
aSd$;t~
private static Sort[] impl=new Sort[]{ 1MHP#X;|
new InsertSort(), m6^Ua
new BubbleSort(), I"Y d6M% ;
new SelectionSort(), 4*MjDb
new ShellSort(), _a@&$NEox
new QuickSort(), (rO_Vfaa
new ImprovedQuickSort(), @;kw6f:{d
new MergeSort(), pg~vteq5
new ImprovedMergeSort(), ?g%5 d
new HeapSort() E]w1!Ah M
}; >JwdVy^
r@FdxsCnGM
public static String toString(int algorithm){ H`q" _p:
return name[algorithm-1]; BT;hW7){9
} rHPda?&H
E@TX>M-&
public static void sort(int[] data, int algorithm) { WRU/^g3O@'
impl[algorithm-1].sort(data); I\DmVc\l
} T:o!H Xdj^
'EU{%\qM
public static interface Sort { 0fA42*s;
public void sort(int[] data); ]#R'hL%f
} ?g|K"P<1
v{`Z
public static void swap(int[] data, int i, int j) { K y~ 9's
int temp = data; 6l&m+!i
data = data[j]; &i"33.#]
data[j] = temp; jm&?;~>O
} I2kqA5>)j
} JbpKstc;