[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; /t< &
} O_7}H)
int i1=l; 0j;ZPqEf3
int i2=mid+1; Z'>UR.g
for(int cur=l;cur<=r;cur++){ ;HH%OfQq
if(i1==mid+1) `^,E4Qy
data[cur]=temp[i2++]; t0jE\6r
else if(i2>r) IG# wY
data[cur]=temp[i1++]; t$%<eF@w
else if(temp[i1] data[cur]=temp[i1++]; h=,hYz?]
else :o~'\:/
data[cur]=temp[i2++]; FZn1$_Svr
} jL8A_'3B
} ]hS<"=oj
>zDQt7+g;
} CuH4~6
< K!r\^
改进后的归并排序: $~G5s<r
Xz^k.4 Y{4
package org.rut.util.algorithm.support; iN. GC^l
B1J,4
import org.rut.util.algorithm.SortUtil; "acI:cl?,
bL`\l!qQx;
/** Exqz$'(W9
* @author treeroot 7%EIn9P
* @since 2006-2-2 0 K#|11r
* @version 1.0 gm2|`^Xq$
*/ ?gUraSFU
public class ImprovedMergeSort implements SortUtil.Sort { @2L^?*n=
R;pW,]}g,
private static final int THRESHOLD = 10; xjiV9{w
LdH1sHy*d`
/* \1gAWUt('
* (non-Javadoc) :e=7=|@7
* =oIt.`rf
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?g{[U0)
*/ T)sIV5bk
public void sort(int[] data) { yNXYS
int[] temp=new int[data.length]; O5vfcX4>
mergeSort(data,temp,0,data.length-1); krFp q;
} V\x'w*FP
C5-u86F
private void mergeSort(int[] data, int[] temp, int l, int r) { yQUrHxm
int i, j, k; jvsSP?]n
int mid = (l + r) / 2; Zs79,*o+0M
if (l == r) ~dEo^vJD
return; -k7b# +T
if ((mid - l) >= THRESHOLD) .pWRV<25
mergeSort(data, temp, l, mid); b#p0s?*
else '%t$mf!nV
insertSort(data, l, mid - l + 1); %;ED}X
if ((r - mid) > THRESHOLD) NZv8#
mergeSort(data, temp, mid + 1, r); BHAFO E
else WN{8gL&y
insertSort(data, mid + 1, r - mid); EBW*v '
rhQ+ylt8I
for (i = l; i <= mid; i++) { gh*k\0
temp = data; ]gVA6B?&9
} B=K<k+{6"
for (j = 1; j <= r - mid; j++) { -e(<Jd_=
temp[r - j + 1] = data[j + mid]; -s2)!Iko&
} *Vq'%b9
int a = temp[l]; )cRHt:
int b = temp[r]; Zf}2c8Vc4
for (i = l, j = r, k = l; k <= r; k++) { zeQ~'ao<
if (a < b) { XrTc5V
data[k] = temp[i++]; h ChO
a = temp; ]}].Aq
} else { o g9|}E>
data[k] = temp[j--]; ?>*d82yO
b = temp[j]; %A~. NNbS
} (*\&xRY|C
} @H$am
} 5)S;R,
nbP}a?XC
/** c^1JSGv
* @param data fgtwVji
* @param l d7b`X<=@s
* @param i NiVLx_<Pr'
*/ !gLJBp
private void insertSort(int[] data, int start, int len) { }0E@eL
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); D[@-`F
} U&B(uk(2
} cwaR#-#
} W`_Wi*z4
} 1_LKqBgo
{`2 0'
堆排序： Ja*,ht(5
[7DU0Xg7
package org.rut.util.algorithm.support; gM1:*YK
~oSA&v4V
import org.rut.util.algorithm.SortUtil; e[T3,2C
teDRX13=;
/** '!Va9m*w7
* @author treeroot B &Z0ZWx
* @since 2006-2-2 =r]_$r%gR
* @version 1.0 !K*3bY`#
*/ otjT?R2g'
public class HeapSort implements SortUtil.Sort{ Uhh[le2 %
N|>MqH,Bt
/* (non-Javadoc) ;MYK TE>m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aRWj+[[7y
*/ ?cz7s28a
public void sort(int[] data) { =u9e5n
MaxHeap h=new MaxHeap(); U/q"F<?.c
h.init(data); $?kTS1I(
for(int i=0;i h.remove(); -6F\=
System.arraycopy(h.queue,1,data,0,data.length); u{WI 4n?
} JK^%V\m
nrpbQ(zI*
private static class MaxHeap{ *yI((G/
DP*V|)
void init(int[] data){ Sb?v5
this.queue=new int[data.length+1]; K~UT@,CS60
for(int i=0;i queue[++size]=data; ?j!/Hc/b4
fixUp(size); '2|mg<Ft
} uh)f/)6
} 96F+I!qC
cru&nH*O^
private int size=0; 'g)5vI~'
@&G %cW(
private int[] queue; {|zQ .sA
q}JP;p(#
public int get() { 9~f RYA*
return queue[1]; }236{)DuN
} Pa\yp?({q
G7-.d/8|^
public void remove() { O'k<4'TC
SortUtil.swap(queue,1,size--); )u!}`UJ
fixDown(1); ]Ah<kq2sk
} =snJ+yn!
file://fixdown bb/A}< zD
private void fixDown(int k) { czo*_q%
int j; /4*>.Nmb,f
while ((j = k << 1) <= size) { S^e e<%-
if (j < size %26amp;%26amp; queue[j] j++; #{bT=:3a
if (queue[k]>queue[j]) file://不用交换 +>mU4Fwp
break; Z79Y$d>G<E
SortUtil.swap(queue,j,k); ir)~T0
k = j; Vc|QW
} .#e?[xxk
} NTM.Vj -_h
private void fixUp(int k) { uhmSp+%
while (k > 1) { Dm;aTe
int j = k >> 1; Bb5RZ#oa
if (queue[j]>queue[k]) ^j_t{h)W(0
break; PTA_erU
SortUtil.swap(queue,j,k); vN)l3
k = j; Kzfy0LWM
} &ujq6~#
} 60p*4>^v
l(tMo7iPa
} G`jJKiC
.)=j~}\
} r$d'[ZcX
6CWm;%B#G
SortUtil： {1wjIo"ptg
g>f_'7F&
package org.rut.util.algorithm; H]f8W]"c[
M059"X="
import org.rut.util.algorithm.support.BubbleSort; CM%;r5
import org.rut.util.algorithm.support.HeapSort; +u7nx
import org.rut.util.algorithm.support.ImprovedMergeSort; za4:Jdr
import org.rut.util.algorithm.support.ImprovedQuickSort; ]:]w+N%7
import org.rut.util.algorithm.support.InsertSort; ,?!4P+ob
import org.rut.util.algorithm.support.MergeSort; ];}7 %3
import org.rut.util.algorithm.support.QuickSort; #J c)v0_
import org.rut.util.algorithm.support.SelectionSort; ?m.Ry
import org.rut.util.algorithm.support.ShellSort; Xu5^ly8p9q
?[Qxq34
/** RZKczZGZg
* @author treeroot L)Ru]X`
* @since 2006-2-2 gtb,}T=1
* @version 1.0 bcprhb
*/ o{ \r1<D
public class SortUtil { ?pF uV`Zm
public final static int INSERT = 1; _"";SqVB
public final static int BUBBLE = 2; IY9##&c3>
public final static int SELECTION = 3; ZNbb8v
public final static int SHELL = 4; Q pbzx/2h
public final static int QUICK = 5; Wp$'#HhB
public final static int IMPROVED_QUICK = 6; '^6x-aeq[D
public final static int MERGE = 7; #v4q:&yKf
public final static int IMPROVED_MERGE = 8; lWYgIpw
public final static int HEAP = 9; -jsk-,
{f)"F;]V
public static void sort(int[] data) { j%s:d(H`
sort(data, IMPROVED_QUICK); Kkds^v6
} ob.=QQQs
private static String[] name={ w!^{Q'/,Q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Gl>_C@n0h
}; !tofO|E5
.Cf`D tK
private static Sort[] impl=new Sort[]{ nqyB,vv0
new InsertSort(), .EoLJHL }
new BubbleSort(), 8klu*
new SelectionSort(), )y}W=Q>T
new ShellSort(), 4~/3MG
new QuickSort(), T]Eg9Y:+v
new ImprovedQuickSort(), }xM >F%
new MergeSort(), p8MPn>h<
new ImprovedMergeSort(), R~DZY{u+/$
new HeapSort() 7vs>PV
}; R k).D6
-gKo@I
public static String toString(int algorithm){ mC(q8%/;
return name[algorithm-1]; [8Zvs=1
} f"G?#dW/1
aC2\C=ru_
public static void sort(int[] data, int algorithm) { N-Nq*
impl[algorithm-1].sort(data); $]yHk
} 'hi.$G_R
=m?x|Zc_v
public static interface Sort { ${F]N }
public void sort(int[] data); /!Ng"^.e
} %7~~*_G
H#;-(`F
public static void swap(int[] data, int i, int j) { RK`C31Ws
int temp = data; mxV0"$'Fm
data = data[j]; KoNJ;YiKtN
data[j] = temp; -NyfW+T={
} }[OOkYF#r
} zLiFk<G@Xi