[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; :.;pRz
} 4<`Qyul-
int i1=l; t(<^of:
int i2=mid+1; K})=&<M0
for(int cur=l;cur<=r;cur++){ c!,&]*h"k
if(i1==mid+1) R^_7B(
data[cur]=temp[i2++]; q> ;u'3}
else if(i2>r) PvmmyF
data[cur]=temp[i1++]; WCa>~dF>
else if(temp[i1] data[cur]=temp[i1++]; j$2rU'
else }>)e~\Tdzb
data[cur]=temp[i2++]; _e2=BE`W)
} OR{<)L
} qG=?+em
608}-J=3#
} c~_nOd
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改进后的归并排序: pKSn 3-A
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package org.rut.util.algorithm.support; /O,>s
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import org.rut.util.algorithm.SortUtil; G9`;Z^<L
G~$.Af!9W
/** ejr9e@D^
* @author treeroot CV9o,rL
* @since 2006-2-2 bfjC:"!H
* @version 1.0 0F"W~OQ6
*/ ~&zrDj~FI
public class ImprovedMergeSort implements SortUtil.Sort { 7(ni_|$|
[w0@7p"7
private static final int THRESHOLD = 10; ,r=9$i_
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/* hW^*b:v{
* (non-Javadoc) YY!Lv:.7>
* VnZRsFY<^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ].=~C"s,a
*/ #3b_#+,
public void sort(int[] data) { U9?fUS
int[] temp=new int[data.length]; *=sMJY9#jE
mergeSort(data,temp,0,data.length-1); -?jI{].:8
} I:~KF/q
D=B$ Pv9%
private void mergeSort(int[] data, int[] temp, int l, int r) { $)HD`E
int i, j, k; %l4;-x<e
int mid = (l + r) / 2; ^M:Y$9r_s
if (l == r) 3q$[r_
return; &.m.ruab
if ((mid - l) >= THRESHOLD) {;z{U;j
mergeSort(data, temp, l, mid); JJIlR{WY_
else -<g&U*/E
insertSort(data, l, mid - l + 1); i6S5 4&^!
if ((r - mid) > THRESHOLD) n!Dr:$
mergeSort(data, temp, mid + 1, r); \wJ2>Q
else iMT[sb
insertSort(data, mid + 1, r - mid); "aU) [
q=EHB5!q
for (i = l; i <= mid; i++) { A`'k5uG
temp = data; G_vcuCHm
} )S:,q3gxJ
for (j = 1; j <= r - mid; j++) { PRdyc+bf
temp[r - j + 1] = data[j + mid]; 65%WjO
} cEdf&*_-'I
int a = temp[l]; wZ(H[be
int b = temp[r]; (G>S`B
for (i = l, j = r, k = l; k <= r; k++) { s6U$]9 `
if (a < b) { -qbx:Kk(
data[k] = temp[i++]; [NxC7p:Lo
a = temp; v>XAzA
} else { 4# L}&
data[k] = temp[j--]; d@0p<at>~
b = temp[j]; L:.z FW,
} Bf21u9
} 8Q{"W"]O7
} ; ,vGw<|o
;u(#-C2^{l
/** *]7$/%.D
* @param data -ho%9LW%|
* @param l 8[k:FGp>
* @param i OV"uIY[%8V
*/ <UEta>jj
private void insertSort(int[] data, int start, int len) { Daw;6f:
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @QN(ouqQ
} A_y]6~Mu?~
} Nf]h8d~
} $_ BoG
} ~6Xr^An/Z
V 6*ohC:
堆排序： (u{?aG~
tk5zq-/d
package org.rut.util.algorithm.support; n@JZ2K4
'^{:HR#i
import org.rut.util.algorithm.SortUtil; +55+%oGl
f@j)t%mh
/** _.{I1*6Y2
* @author treeroot >1$vG
* @since 2006-2-2 :Rroz]*
* @version 1.0 2Y7u M;8
*/ N|rB~
public class HeapSort implements SortUtil.Sort{ baO'FyCs9&
ppP0W`p
/* (non-Javadoc) R<L<kChg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x 8/I"!gI
*/ LmZ"_
public void sort(int[] data) { Y'{F^VxA/
MaxHeap h=new MaxHeap(); W"v"mjYud
h.init(data); z@8W
for(int i=0;i h.remove(); +_T`tmQ
System.arraycopy(h.queue,1,data,0,data.length); lz [s
} @2`$ XWD
}eK.\_t=
private static class MaxHeap{ +T/T\[
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void init(int[] data){ &)$}Nk
this.queue=new int[data.length+1]; /Xm4%~b_gj
for(int i=0;i queue[++size]=data; MS~+P'
fixUp(size); JW}O`H9
} S]x\Asj;w
} X{u\|e{
-z~;f<+I`
private int size=0; fEB&)mM
"g%=FH3e
private int[] queue; ED;rp9(
YApm)O={
public int get() { 69?wZfj'
return queue[1]; y2o~~te
} A-&XgOL
^2a63_
public void remove() { 2X,`t%o
SortUtil.swap(queue,1,size--); KNG7$icG
fixDown(1); NVX@1}
} 'JRYf;9c
file://fixdown >X_5o^s2s
private void fixDown(int k) { ]ft}fU5C1
int j; _*.ImD
while ((j = k << 1) <= size) { )gHfbUYS
if (j < size %26amp;%26amp; queue[j] j++; )?MUUI:
if (queue[k]>queue[j]) file://不用交换 0a}a
break; @~CXnc0
SortUtil.swap(queue,j,k); ^1-Vd5g
k = j; iF*L-
} J|aU}Z8m
} *hIjVKTu79
private void fixUp(int k) { V%Ww;Ca]I
while (k > 1) { :[J'B4>9
int j = k >> 1; mv{bX|.
if (queue[j]>queue[k]) G -V~6
break; va[r~
SortUtil.swap(queue,j,k); ~zYk,;m
k = j; D$U`u[qjtS
} Pk{%2\%&2
} d#CAP9n;'
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} X.GK5Phd
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} phi9/tO\u
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SortUtil： +`f3_Xd
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package org.rut.util.algorithm; yi;pn Z
*6aIDFNl
import org.rut.util.algorithm.support.BubbleSort; \P;2s<6i\
import org.rut.util.algorithm.support.HeapSort; jdX*
import org.rut.util.algorithm.support.ImprovedMergeSort; )wNcz~ Y
import org.rut.util.algorithm.support.ImprovedQuickSort; [?55vYt
import org.rut.util.algorithm.support.InsertSort; )m$MC25
import org.rut.util.algorithm.support.MergeSort; ;-^8lWt
import org.rut.util.algorithm.support.QuickSort; ~0Z.,p_
import org.rut.util.algorithm.support.SelectionSort; KA? J:
import org.rut.util.algorithm.support.ShellSort; FEA t6
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/** -BC`p 8
* @author treeroot kfgkZ"9
* @since 2006-2-2 {u[_^
* @version 1.0 PJL [En*
*/ D@)L?AB1f
public class SortUtil { 57Bxx__S4`
public final static int INSERT = 1; JqV}>"WMV
public final static int BUBBLE = 2; lx<!*2 -^
public final static int SELECTION = 3; Om(Ir&0
public final static int SHELL = 4; Ez / W$U
public final static int QUICK = 5; MNf^ml[
public final static int IMPROVED_QUICK = 6; 1G8,Eah
public final static int MERGE = 7; %J8uVD.2
public final static int IMPROVED_MERGE = 8; Ip|=NQL>
public final static int HEAP = 9; k_`h (R
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public static void sort(int[] data) { snYyxi
sort(data, IMPROVED_QUICK); [nf5<
} L:\>)6]Ls
private static String[] name={ oFKTBH:I
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" xEg@Y"NQ
}; NwN3T]W
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private static Sort[] impl=new Sort[]{ cAq5vAqmg
new InsertSort(), & zv!cf
new BubbleSort(), ?4#UW7I
new SelectionSort(), srhI%Zj
new ShellSort(), dVSQG947i:
new QuickSort(), Pq,iR J
new ImprovedQuickSort(), {dYz|O<
new MergeSort(), =~TPrO^
new ImprovedMergeSort(), ?&=JGk^eJ
new HeapSort() "?^#+@LV
}; s6k(K>Pl
S1#5oy2
public static String toString(int algorithm){ c8Nl$|B
return name[algorithm-1]; Nw '$r
} owx0J,,G
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public static void sort(int[] data, int algorithm) { tL M@o|:
impl[algorithm-1].sort(data); gwbV$[.X
} B'I_i$g4w
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public static interface Sort { kqjj&{vPFJ
public void sort(int[] data); 3Ww 37V>h
} -<:w{cV
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public static void swap(int[] data, int i, int j) { KQ^|prN?y
int temp = data; .hJcK/m
data = data[j]; ]xGpN ]u
data[j] = temp; niyI$OC
} Za]~[F
} tn;{r