[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; <dNOd0e
} 3`?7<YJ
int i1=l; T<>,lQs(a
int i2=mid+1; E=Bf1/c\
for(int cur=l;cur<=r;cur++){ Oszj$C(jF
if(i1==mid+1) :,7hWs
data[cur]=temp[i2++]; ttQGoUkj
else if(i2>r) {fM'6;ak
data[cur]=temp[i1++]; ~=LE0.3[
else if(temp[i1] data[cur]=temp[i1++]; W i.&e
else VGN5<?PrN
data[cur]=temp[i2++]; !|uWH
} `RW HN/U
} Uc>lGo1j
Z\rwO>3
} 4"ZP 'I;
YP<ms
改进后的归并排序: _61gF[r4!Y
gJ+'W1$/
package org.rut.util.algorithm.support; VQ@
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import org.rut.util.algorithm.SortUtil; =XQ%t @z0
RP|`HkP-2
/** ?$pCsBDo
* @author treeroot yPp9\[+^j
* @since 2006-2-2 cVpp-Z|s8
* @version 1.0 IPpN@
*/ y.k~Y0
public class ImprovedMergeSort implements SortUtil.Sort { 8Fh)eha9f
U/M>?G~
private static final int THRESHOLD = 10; q?:dCFw$x5
&-w Cvp7
/* /nsX]V6i
* (non-Javadoc) M_f:A
* 6@!`]tSCK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T>Z<]s
*/ :-Z2:/P
public void sort(int[] data) { qR{=pR
int[] temp=new int[data.length]; cjY-y-vO
mergeSort(data,temp,0,data.length-1); 6MW{,N
} ,`Z1m o>n
(CL%>5V
private void mergeSort(int[] data, int[] temp, int l, int r) { Y=KTeYW`
int i, j, k; UkC!1Jy
int mid = (l + r) / 2; -2[a2^a'
if (l == r) dT8S~-d%
return; X?',n 1
if ((mid - l) >= THRESHOLD) j$:~Rek
mergeSort(data, temp, l, mid); 00y!K m_D
else uzPVTo|=
insertSort(data, l, mid - l + 1); q`-N7 ,$T
if ((r - mid) > THRESHOLD) 33q}CzK
mergeSort(data, temp, mid + 1, r); <lPG=Xt
else JQI: sj
insertSort(data, mid + 1, r - mid); q;CiV
HC8e>kP9b
for (i = l; i <= mid; i++) { '<<t]kK[N
temp = data; L*+@>3mu)
} ITBE|b
for (j = 1; j <= r - mid; j++) { (ZizuHC
temp[r - j + 1] = data[j + mid]; F>l] 9!P|m
} ?l )[7LR4
int a = temp[l]; Avc%2+
int b = temp[r]; \\qZl)P_
for (i = l, j = r, k = l; k <= r; k++) { 59A}}.@?m
if (a < b) { O/Crd/
data[k] = temp[i++]; t:Q*gWRh
a = temp; Kc-W&?~y#1
} else { =T@1@w
data[k] = temp[j--]; SnfYT)Ph
b = temp[j]; ]ieeP4*
} ;^*W+,4WB
} *)Zdz9E'1(
} ~0$&3a<n1
FZlWsp=
/** oc`H}Wvn
* @param data F41=b4/
* @param l n>YKa)|W`
* @param i NLqzi%s
*/ a=2%4Wmz
private void insertSort(int[] data, int start, int len) { CdQ!GS<'y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); t{96p77)=
} +<C!U'
} 6_Y,eL]"
} ~?BXti<!
} ?tbrbkx
wHy!CP%
堆排序： :I#V.
&QgR*,5eo
package org.rut.util.algorithm.support; SJ,v?=S!
}7Q%6&IR
import org.rut.util.algorithm.SortUtil; 5b*C1HS@X
8ib:FF(= u
/** a~w$#fo"`f
* @author treeroot !|(NgzDP/
* @since 2006-2-2 N6:`/f+A>T
* @version 1.0 1+s;FJ2}
*/ sgFEK[w.y
public class HeapSort implements SortUtil.Sort{ k,*XG$2h
mzgfFNm^G)
/* (non-Javadoc) Zy/_ E@C}u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;=z:F<Y
*/ 0=YI@@n)
public void sort(int[] data) { qE"OB
MaxHeap h=new MaxHeap(); zDG b7S{
h.init(data); z03K=aZ
for(int i=0;i h.remove(); <P_-s*b
System.arraycopy(h.queue,1,data,0,data.length); WyiQoN'q
} |6-nbj
9*M,R,y
private static class MaxHeap{ @yYkti;4-
F^:3?JA_
void init(int[] data){ t6c4+D'{].
this.queue=new int[data.length+1]; gbA_DZ
for(int i=0;i queue[++size]=data; B+`g>h
fixUp(size); CU0YIL
} uY To9A
} h*\%vr
RRJ%:5&
private int size=0; ~n_HP_Kf?
He@KV=
private int[] queue; ^\m![T\bX
TWTb?HP
public int get() { f o3}W^0
return queue[1]; ;uGv:$([g
} :3 mh@[V
+}AI@+
public void remove() { pb,d'z\S
SortUtil.swap(queue,1,size--); ;^L(^Hx
fixDown(1); -~w'Xo#
} $??I/6
file://fixdown HPVEnVn
private void fixDown(int k) { 2=}FBA,2
int j; x8|J-8A(
while ((j = k << 1) <= size) { Hl=xW/%6y
if (j < size %26amp;%26amp; queue[j] j++; .xkM.g4{~
if (queue[k]>queue[j]) file://不用交换 i|kRK7[6B
break; ?Bmb' 3
SortUtil.swap(queue,j,k); !4!~Lk=
k = j; ;tf=gdX;
} DY*N|OnqJ
} EU#^7
private void fixUp(int k) { %C]>9."
while (k > 1) { !G|@6W`
int j = k >> 1; dO\"?aiD
if (queue[j]>queue[k]) p#tI;"\y
break; 4,ag(^}=
SortUtil.swap(queue,j,k); zt%Mx>V@
k = j; WIGi51yC.x
} rJB}qYD
} Z_NCD`i;
=_^X3z0
} * y,v}-
*^`Vz?g<
} Gc7=
'3;b@g,
SortUtil： q^nVN#
W,u:gzmhw
package org.rut.util.algorithm; wd6owr
&^nGtW%a 9
import org.rut.util.algorithm.support.BubbleSort; vDvFL<`vmD
import org.rut.util.algorithm.support.HeapSort; %iB,IEw
import org.rut.util.algorithm.support.ImprovedMergeSort; `D9$v(Ztr
import org.rut.util.algorithm.support.ImprovedQuickSort; j<$2hiI/?&
import org.rut.util.algorithm.support.InsertSort; I-)4YQI
import org.rut.util.algorithm.support.MergeSort; HaYo!.(Fv
import org.rut.util.algorithm.support.QuickSort; ssL\g`xe
import org.rut.util.algorithm.support.SelectionSort; xSu >
import org.rut.util.algorithm.support.ShellSort; F0# 'WfM#
*zLMpL_
/** AQ Ojit6p
* @author treeroot qQa}wcU'9p
* @since 2006-2-2 :6dxtl/{b:
* @version 1.0 Y);=TM6s
*/ I1J-)R+
public class SortUtil { *1"+%Z^
public final static int INSERT = 1; =~gvZV-<
public final static int BUBBLE = 2; a'T;x`b8U,
public final static int SELECTION = 3; dr"1s-D4IQ
public final static int SHELL = 4; x1a:u
public final static int QUICK = 5; fQFk+C
public final static int IMPROVED_QUICK = 6; XPPdwTOr
public final static int MERGE = 7; X3& Jb2c2
public final static int IMPROVED_MERGE = 8; 1~gCtBRM
public final static int HEAP = 9; PY'2h4IL
2<6UwF
public static void sort(int[] data) { p7~!z.)o
sort(data, IMPROVED_QUICK); !x)R=Z/C
} k7^5Bp8=
private static String[] name={ {8etv:y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" HZOMlOZ
}; ?]5qr?W%
OrW
private static Sort[] impl=new Sort[]{ u?EN
new InsertSort(), F"kAkX>3}
new BubbleSort(), rM SZ"
new SelectionSort(), iow"n$/
new ShellSort(), 4Tc~b3\!Y
new QuickSort(), )%]J>&/0J
new ImprovedQuickSort(), 3' 'me
new MergeSort(), IGgL7^MF
new ImprovedMergeSort(), ,: ^u-b|
new HeapSort() {{1G`;|v9
}; =MWHJ'3-/
}B^tL$k
public static String toString(int algorithm){ E`J@hl$N
return name[algorithm-1]; $Kd>:f=A
} 7$#u
UZ";a453r
public static void sort(int[] data, int algorithm) { ; @X<lCk
impl[algorithm-1].sort(data); Bp{Ri_&A
} ^?|"L>y
bd`P0f?
public static interface Sort { F[MFx^sT{
public void sort(int[] data); MfkZ
} {)Xy%QV
&j6erwaT
public static void swap(int[] data, int i, int j) { 62u4-}JzF
int temp = data; ?4uL-z](V
data = data[j]; )gi9f1n`
data[j] = temp; d5-qZ{W
} <naz+QK'
} [B3RfCV{