[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; m})EYs1
} @D3|Ak1
int i1=l; 0|L%)'F
int i2=mid+1; Jh6 z5xUV
for(int cur=l;cur<=r;cur++){ 1>"Yw|F-|3
if(i1==mid+1) aj\ zc I
data[cur]=temp[i2++]; Wh7}G
else if(i2>r) U6sPJc<
data[cur]=temp[i1++]; bS2)L4MQY
else if(temp[i1] data[cur]=temp[i1++]; $I$ B8
else V`,tu `6
data[cur]=temp[i2++]; 9Q.}jV
} ww^!|VVa
} &>KZ4%&?
0Xe?{!@a
} :tTP3t5
wq6.:8Or-]
改进后的归并排序: ;q;}2
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package org.rut.util.algorithm.support; ;bh[TmQTJ
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import org.rut.util.algorithm.SortUtil; [\|p~Qb)s
P&2/J%@zG
/** (vXes.|+t
* @author treeroot H\[:uUK5\
* @since 2006-2-2 ^j)0&}fB
* @version 1.0 6.0/asN}
*/ !=t.AgmL
public class ImprovedMergeSort implements SortUtil.Sort { kH9fK80
hp<NVST
private static final int THRESHOLD = 10; K[G=J
rO;Vr},3\%
/* +j">Ju6Q;.
* (non-Javadoc) Lfj]Y~*z
* Ic,V,#my
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O>~ozW&
*/ V+yyy-/
public void sort(int[] data) { \y\@=j
int[] temp=new int[data.length]; u,f$cR
mergeSort(data,temp,0,data.length-1); 9-6E(D-ux
} rf[w&~R
YYzl"<)c
private void mergeSort(int[] data, int[] temp, int l, int r) { 9yA? 82)E
int i, j, k; "A0J~YvYWJ
int mid = (l + r) / 2; gbclk~kX
if (l == r) ]u(EEsG/
return; >i:hdcxe
if ((mid - l) >= THRESHOLD) 7z@Jw
mergeSort(data, temp, l, mid); E#I^D/0
else <lxE^M
insertSort(data, l, mid - l + 1); c7[+gc5}
if ((r - mid) > THRESHOLD) ]>%M%B
mergeSort(data, temp, mid + 1, r); X7~AqG
else _+?v'#
insertSort(data, mid + 1, r - mid); Qjl.O HO
]DV=/RpJ9B
for (i = l; i <= mid; i++) { +:#x!i;W8[
temp = data; v_s(
} Gi9s*v,s
for (j = 1; j <= r - mid; j++) { QaAWO
temp[r - j + 1] = data[j + mid]; 'nR'o /!
} "7RnT3
int a = temp[l]; .V.x0
int b = temp[r]; 8G6[\P3fQ
for (i = l, j = r, k = l; k <= r; k++) { 2TxHY|4
if (a < b) { dEuts*@Q
data[k] = temp[i++]; #y4+O;{
a = temp; Ki_8g
} else { cf7UV6D g
data[k] = temp[j--]; hCX_^%
b = temp[j]; <`/22S"
} 'A}@XGE:p
} Sph:OX8
} $^XCI%DH
{G^f/%
/** 3%'Y):
* @param data &|8R4l C|
* @param l )?zlhsu}1;
* @param i <Jwx|
*/ >I^_kBa
private void insertSort(int[] data, int start, int len) { =SEgv;#KZ~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); mO1r~-~AJ
} {;T7Kg.C
} ~$FgiW
} UOwEA9q%
} E2Jmo5yJR
S~+er{,ht4
堆排序： |[lmW%
BA 9c-Ay
package org.rut.util.algorithm.support; ?-HLP%C('
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import org.rut.util.algorithm.SortUtil; `[=3_
]3/_?n-"`
/** {0t-Q k
* @author treeroot d2!A32m
* @since 2006-2-2 B{^ojV;]m
* @version 1.0 G7yR&x^
*/ m[t4XK
public class HeapSort implements SortUtil.Sort{ btV Tt5
E#L"*vh
/* (non-Javadoc) $ZEwz;HNo
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &0='z
*/ Pgp`g.$<
public void sort(int[] data) { HLYTt)f}
MaxHeap h=new MaxHeap(); 3tZC&!x?
h.init(data); \ O#6H5F
for(int i=0;i h.remove(); #F~^m
System.arraycopy(h.queue,1,data,0,data.length); ~g_]Sskf7
} &~SPDiu.t
!9/1_Bjv
private static class MaxHeap{ \j$q';9p
p!wx10b
void init(int[] data){ C72!::o
this.queue=new int[data.length+1]; EG|fGkv"
for(int i=0;i queue[++size]=data; `BA,_N|6
fixUp(size); N;A#K7A[@
} 5,,b>Z<
} F^mMyK
*t-Wol
private int size=0; 2Kg+SLU[~
[!k#au+#c
private int[] queue; 4-wCk=I
{}W9m)I
public int get() { PI5a'k0F
return queue[1]; Y4 <
} XC D&Im
-hpJL\ng
public void remove() { P`$"B0B)
SortUtil.swap(queue,1,size--); yL#bZ9W }
fixDown(1); JTw3uM, e
} uoIvFcb^
file://fixdown _?+gfi+
private void fixDown(int k) { 4 )U,A~!
int j; 0bt"U=x4
while ((j = k << 1) <= size) { 7P!Hryy
if (j < size %26amp;%26amp; queue[j] j++; %v_w"2x;
if (queue[k]>queue[j]) file://不用交换 !&ly :v!
break; =DT7]fU
SortUtil.swap(queue,j,k); ,vnHEY&
k = j; 4%]wd}'#Un
} bc{ {a
} EC]b]'._
private void fixUp(int k) { #:5vN-9?
while (k > 1) { lg(*:To3B
int j = k >> 1; .YT&V
if (queue[j]>queue[k]) =y>g:}G7
break; 0CTUcVM#9
SortUtil.swap(queue,j,k); E[Rd=/P6
k = j; E`DsRR <
} g20,et
} h)MU^aP
,hV}wK!
} heAbxs
te 0a6
} _,U`Iq+X
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SortUtil： ~`<(T)rs
6;:s N8M+1
package org.rut.util.algorithm; xjplJ'jB
m-M.F9R
import org.rut.util.algorithm.support.BubbleSort; nisW<Q`uB
import org.rut.util.algorithm.support.HeapSort; %pR:.u|
import org.rut.util.algorithm.support.ImprovedMergeSort; :+G1=TuXw~
import org.rut.util.algorithm.support.ImprovedQuickSort; BfcpB)N&.K
import org.rut.util.algorithm.support.InsertSort; *A>I)a<:
import org.rut.util.algorithm.support.MergeSort; QNk\y@yKw
import org.rut.util.algorithm.support.QuickSort; .BWCGb2bH
import org.rut.util.algorithm.support.SelectionSort; Do3g^RD#
import org.rut.util.algorithm.support.ShellSort; ZP]l%6\.
}qa8o
/** .sO.Y<-fl
* @author treeroot %B,>6 `[
* @since 2006-2-2 h^tU*"
* @version 1.0 xw)$).yc
*/ ex-0@
public class SortUtil { bw@"MF{
public final static int INSERT = 1; [xTu29X.
public final static int BUBBLE = 2; mihR *8p
public final static int SELECTION = 3; +~E;x1&'
public final static int SHELL = 4; p\7(`0?8VN
public final static int QUICK = 5; *G<K@k
public final static int IMPROVED_QUICK = 6; S:*.,zC
public final static int MERGE = 7; AWY#t&
public final static int IMPROVED_MERGE = 8; 1236W+
public final static int HEAP = 9; [+q':T1W-
TT'sO[N[
public static void sort(int[] data) { @Yv.HhO9
sort(data, IMPROVED_QUICK); 7({"dW
} ;{zgp
private static String[] name={ O e-FI+7
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7B|ddi7Q>
}; OMi_')J
(4hCT*
private static Sort[] impl=new Sort[]{ W!R}eLf@
new InsertSort(), ,<pk&54.@'
new BubbleSort(), 'T8(md299
new SelectionSort(), D9cpw0{nc
new ShellSort(), .+;;-]})
new QuickSort(), Y"x9B%e
new ImprovedQuickSort(), gCVgL]jj(
new MergeSort(), C6$F.v
new ImprovedMergeSort(), aCq ) hR
new HeapSort() |6M:JI8
}; u@;6r"8q
7_HJ|QB
public static String toString(int algorithm){ Y5 BWg
return name[algorithm-1]; N3_rqRd^
} ]dx6E6A,
OwdA6it^f
public static void sort(int[] data, int algorithm) { B.e3IM0
impl[algorithm-1].sort(data); 3C+!Y#F
} 3X0"</G6
cTU%=/gbc<
public static interface Sort { }.nHT0l
public void sort(int[] data); IQ${2Dpg[
} f.Uvf^T}2
mHm"QBa!
public static void swap(int[] data, int i, int j) { q0Hor
int temp = data; yX^/Oc@j
data = data[j]; _y,?Cj=u|
data[j] = temp; Nq$Xe~,*
} q_h=O1W
} deRnP$u0