[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; hZ2PP ^
} 7MoO2
int i1=l; 'kH#QO\(e"
int i2=mid+1; {H])Fob
for(int cur=l;cur<=r;cur++){ PDD` eK}Fj
if(i1==mid+1) *k+QX
data[cur]=temp[i2++]; A: 0] n
else if(i2>r) AQQj]7Y
data[cur]=temp[i1++]; JSGUl4N
else if(temp[i1] data[cur]=temp[i1++]; De>pIN;B>
else RK rBHqh@
data[cur]=temp[i2++]; cLR8U1k'
} Ae ue:u>
} M\`6H8aLn
6bHj<6>MX
} .*Hv^_
A]H+rxg
改进后的归并排序: ^<y$+HcH
'O{hr0q}
package org.rut.util.algorithm.support; Jc:G7}j6
PU-~7h+$
import org.rut.util.algorithm.SortUtil; l_,8_u7G
4?%0z) g
/** 3>L1}zyM]
* @author treeroot $<ZX};/D
* @since 2006-2-2 ~gBqkZ# y?
* @version 1.0 fcw\`.
*/ A=XM(2{aN
public class ImprovedMergeSort implements SortUtil.Sort { QQ!,W':
kQ'G+Kw~F
private static final int THRESHOLD = 10; YmF`7W
vm4]KEyrX
/* {<kl)}
* (non-Javadoc) .-WCB
* 8V}c(2m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |ZZ3Qr+%S
*/ &Q&$J )0
public void sort(int[] data) { )9<)mV*EB(
int[] temp=new int[data.length]; "UAW
mergeSort(data,temp,0,data.length-1); X0!48fL*
} %H}+'.8
IL>g-
private void mergeSort(int[] data, int[] temp, int l, int r) { Wq,UxMz
int i, j, k; *-P@|eg
int mid = (l + r) / 2; NEGpf[$
if (l == r) 4tu2%Og)?
return; >Zr/U!W*?
if ((mid - l) >= THRESHOLD) Pc4sReo'
mergeSort(data, temp, l, mid); )L#I#%
else 97Q!Rot
insertSort(data, l, mid - l + 1); 4e%SF|(Y'h
if ((r - mid) > THRESHOLD) %"KBX~3+Kj
mergeSort(data, temp, mid + 1, r); =%]dk=n?TN
else :$}67b)MO
insertSort(data, mid + 1, r - mid); _FVIN;!
*{-XN
for (i = l; i <= mid; i++) { ~V./*CQ\c
temp = data; .5I1wRN49
} a\%g_Q){
for (j = 1; j <= r - mid; j++) { 0e}LZ,9e
temp[r - j + 1] = data[j + mid]; kXOlZC
} SQz>e
int a = temp[l]; ]I}' [D
int b = temp[r]; L3kms6ch
for (i = l, j = r, k = l; k <= r; k++) { [e*8hbS
if (a < b) { |UlScUI,
data[k] = temp[i++]; E4{^[=}
a = temp; W0nRUAo[
} else { BRW
data[k] = temp[j--]; QTLOP~^
b = temp[j]; =j}00,WH
} Ur@'X-
} FD`V39##
} IzL yn
TnKe"TA|9
/** Zd5frc$
* @param data |H |ewVUY
* @param l sXfx[)T<
* @param i k*n5+[U^tP
*/ =XWi+')
private void insertSort(int[] data, int start, int len) { =nY*,Xu<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @0)bY*njj
} 2smLv1w@
} : 0%V:B
} ( E0be.
} k@wxN!w;
~5JXY5*o
堆排序： E8V,".!+E
g!K(xhEO
package org.rut.util.algorithm.support; Y]Xal
)9PQj
import org.rut.util.algorithm.SortUtil; VvPTL8Z
\.*aC)
/** lJKU^?4S8
* @author treeroot 7d9%L}+q
* @since 2006-2-2 G,$jU9 f
* @version 1.0 4K4?Q+?
*/ .IG(Y!cB
public class HeapSort implements SortUtil.Sort{ mk0rAN
e<IT2tv>u
/* (non-Javadoc) J[<:-$E
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \Mi y+<8$
*/ 9 s>JdAw?
public void sort(int[] data) { XLzHm&;
MaxHeap h=new MaxHeap(); ~A6QX8a
h.init(data); M~wJe@bc
for(int i=0;i h.remove(); o,X ?
System.arraycopy(h.queue,1,data,0,data.length); FfP Ce5)
} 8-po|
PR.?"$!D{
private static class MaxHeap{ %+`$Lb?{
8Y&(o-R0
void init(int[] data){ %*Y:Rm'>
this.queue=new int[data.length+1]; NB>fr#pb
for(int i=0;i queue[++size]=data; )TP7gLv=b
fixUp(size); +=:CW'B5
} a|66[
} 9?]4s-~
n32BHOVE
private int size=0; L.erP* w
'GNT'y_
private int[] queue; [S*bN!t
d7l0;yR&+
public int get() { jMZ{>l.v
return queue[1]; 4Kx;F 9!%~
} wLNO\JP'
!v94FkS>
public void remove() { b^FB[tZ\x
SortUtil.swap(queue,1,size--); :~g=n&x
fixDown(1); 0h$23.
} mNs&*h}
file://fixdown 7zy6`OP
private void fixDown(int k) { bl:.D~@
int j; jYuH zf
while ((j = k << 1) <= size) { &grT}
if (j < size %26amp;%26amp; queue[j] j++; H{9di\xnEm
if (queue[k]>queue[j]) file://不用交换 ^TnBtIU-B
break; p"Fj6T2
SortUtil.swap(queue,j,k); LL.YkYu
k = j; q(_pk&/
} 4WDh8U
} nV GrW#'E
private void fixUp(int k) { 3C2L _ K3
while (k > 1) { RV7l=G9tq
int j = k >> 1; 8g&uCv/Uk
if (queue[j]>queue[k]) NCd_h<}|6F
break; mVW:]|!s
SortUtil.swap(queue,j,k); ] S]F&B M|
k = j; 7pmhH%Dn$
} %?R}sUo
} sy#CR4X
@/XA*9]l
} 91e&-acA
3fM~R+p
} AEhh 6v
>STWt>s
SortUtil： @)|62Dv /
|%we@ E
package org.rut.util.algorithm; r#3(;N{=
;#cb%e3
import org.rut.util.algorithm.support.BubbleSort; ZB<goEg
import org.rut.util.algorithm.support.HeapSort; A2g+m
import org.rut.util.algorithm.support.ImprovedMergeSort; g!cTG-bh>J
import org.rut.util.algorithm.support.ImprovedQuickSort; TDk'
import org.rut.util.algorithm.support.InsertSort; iIA&\'|;i
import org.rut.util.algorithm.support.MergeSort; '$;S?6$eW
import org.rut.util.algorithm.support.QuickSort; 5c!~WckbJ
import org.rut.util.algorithm.support.SelectionSort; 9SXFiZA(r
import org.rut.util.algorithm.support.ShellSort; vG69z&
pjWqI6,
/** LZ}C{M{=5A
* @author treeroot tLJ"] D1w
* @since 2006-2-2 V-Oy<
* @version 1.0 Z$~Wr3/
*/ +|KnO
public class SortUtil { tJ i#bg%
public final static int INSERT = 1; b_:]Y<{> f
public final static int BUBBLE = 2; (%YFcE)SRS
public final static int SELECTION = 3; M)#aX|%Mh
public final static int SHELL = 4; -]\UFR
public final static int QUICK = 5; v:nm#P%P
public final static int IMPROVED_QUICK = 6; ;1A4p`)
public final static int MERGE = 7; yk,o*g
public final static int IMPROVED_MERGE = 8; ehV`@ss
public final static int HEAP = 9; V31<~&O~%
kR3g,P{L
public static void sort(int[] data) { VkZrb2]v
sort(data, IMPROVED_QUICK); >/Gz*.
} 8lg$]
private static String[] name={ bO8g#rO
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" g VplBF7{
}; m?V4r#t
bF0y`
private static Sort[] impl=new Sort[]{ %l(qyH)*
new InsertSort(), [?Wt ZM^q
new BubbleSort(), GBFYa6\4sT
new SelectionSort(), mADq_`j
new ShellSort(), odD^xg"L
new QuickSort(), kG^DHEne
new ImprovedQuickSort(), /Q8E12
new MergeSort(), ?YOH9%_cs
new ImprovedMergeSort(), FO&U{(Q
new HeapSort() K?8{y
}; rzsb(
[kM)K'-
public static String toString(int algorithm){ @7e h/|Y,
return name[algorithm-1]; ?suNA
} g[!t@K
w$MFCJ:p&
public static void sort(int[] data, int algorithm) { NTkGLD1e.
impl[algorithm-1].sort(data); 4p\<b8(9>
} *Fi`o_d9[`
/'ccFm2
public static interface Sort { O KVIl
public void sort(int[] data); KuL2X@)}
} ^2rNty,nH
M_<O'Ii3
public static void swap(int[] data, int i, int j) { !`LaX!bmp
int temp = data; ouL/tt_~
data = data[j]; L}T:Y).
data[j] = temp; f 0A0uU8y
} mEyJ o|
} ]3uErnI