[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; ;hA>?o_i(
} ^&am]W;T
int i1=l; R9f*&lj
int i2=mid+1; J [J,
for(int cur=l;cur<=r;cur++){ (Gf1#,/3~
if(i1==mid+1) :/c=."z.
data[cur]=temp[i2++]; PaP47>(
else if(i2>r) \|BtgT*$b
data[cur]=temp[i1++]; 'b]GcAL
else if(temp[i1] data[cur]=temp[i1++]; '*MNRduE6
else ]hpocr
data[cur]=temp[i2++]; tu#VZAPW@
} ),v[.9!}:
} +v2Fr}
dy-m9fc6%
} &, hhH_W
5&D)W>{d
改进后的归并排序: q+.DZ @
a)^f`s^aa
package org.rut.util.algorithm.support; cx_FtD
3+@p
import org.rut.util.algorithm.SortUtil; /B.\6
):; &~
/** c}kZx1
* @author treeroot A1Ia9@=Mf
* @since 2006-2-2 biKom|<nm
* @version 1.0 9F845M
*/ ^s\(2lB\F
public class ImprovedMergeSort implements SortUtil.Sort { aFjcyD
Ki(qA(r
private static final int THRESHOLD = 10; @(Wx(3JR?}
@G+Hrd6
/* r"d/9
* (non-Javadoc) [wWip1OR
* P95U{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2>Hl=bX
*/ =hxj B*")
public void sort(int[] data) { .xS3,O_[
int[] temp=new int[data.length]; 0%+S@_|
mergeSort(data,temp,0,data.length-1); dnTB$8&
} *&9_+F8ly
5+].$
private void mergeSort(int[] data, int[] temp, int l, int r) { 3?iRf6;n
int i, j, k; .0kltnB
int mid = (l + r) / 2; tsVQXvo
if (l == r) /kqW
return; GGo)k1T|)
if ((mid - l) >= THRESHOLD) /)sA{q 4
mergeSort(data, temp, l, mid); mnZ/rb
else ~B;kFdcVXn
insertSort(data, l, mid - l + 1); 3[B*l@}j
if ((r - mid) > THRESHOLD) C&YJvMu
mergeSort(data, temp, mid + 1, r); |Wd]:ijJ
else `9E:V=
insertSort(data, mid + 1, r - mid); @GDe{GG+
)8VrGg?
for (i = l; i <= mid; i++) { 9\ZlRYnc=
temp = data; CG*eo!Nw
} 3B!lE(r%J
for (j = 1; j <= r - mid; j++) { Cx2s5vJX4p
temp[r - j + 1] = data[j + mid]; Kmc*z (Q
} ~Mbo`:>(4v
int a = temp[l]; =)5O(h
int b = temp[r]; ((&_m9a
for (i = l, j = r, k = l; k <= r; k++) { h}r*
if (a < b) { rCU f,)
data[k] = temp[i++]; k,wr6>'Vt
a = temp; !`"@!
} else { OFJ49X
data[k] = temp[j--]; Kq#\P
b = temp[j]; (jd)sf6Tj[
} by!1L1[JTt
} j oDY
} *z I@Htp
KI)jP((
/** ATl.Qku@
* @param data 9Jd{HI=
* @param l dZcRLLR
* @param i Q%)da)0:c
*/ #$7d1bx
private void insertSort(int[] data, int start, int len) { tkX7yg>`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Y5?*=eM
} is}6cR
} T9w;4XF
} uJ<nW%}
} lVF}G[B
"#1KO1@G
堆排序： V'?bZcRr~
*`$Y!uzG:\
package org.rut.util.algorithm.support; q-gp;Fm
*W,tq(%tQ
import org.rut.util.algorithm.SortUtil; k+#6
;D.a |(Q
/** le60b@2G0
* @author treeroot S.&=>
* @since 2006-2-2 =j#1HI=Fe
* @version 1.0 NwPGH=V
*/ j#L"fW^GM
public class HeapSort implements SortUtil.Sort{ s|B
eGcc'LBr;
/* (non-Javadoc) F]o&m::/K
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SNqw2f5
*/ }dcXuX4{r
public void sort(int[] data) { Age
MaxHeap h=new MaxHeap(); XTboFrf
h.init(data); E_sKDybj
for(int i=0;i h.remove(); 7|Z=#3INw
System.arraycopy(h.queue,1,data,0,data.length); !bs{/?
} V&nTf100
.m%/JquMFM
private static class MaxHeap{ E57:ap)/
6r
void init(int[] data){ );EW(7KeL
this.queue=new int[data.length+1]; KFQ4vavNh
for(int i=0;i queue[++size]=data; ^w]N#%k\H
fixUp(size); yKupPp);
} pFE&`T@ <
} r\nKJdh;ka
}nh!dVA8lh
private int size=0; 6zv-nMZc
Mn$w_Z?
private int[] queue; tFlLKziU
u /PaXQ
public int get() { cHqT1EY
return queue[1]; >f)/z$ qn
} DD 8uG`<
Cg{V"B:
public void remove() { mL\_C9k,n
SortUtil.swap(queue,1,size--); i,#j@R@.C7
fixDown(1); 2XoFmV),F
} E|R^tETb
file://fixdown 8{DZew /
private void fixDown(int k) { ;rwjqUDBz
int j; <X>lA
while ((j = k << 1) <= size) { Iw@ou
if (j < size %26amp;%26amp; queue[j] j++; \3nu &8d
if (queue[k]>queue[j]) file://不用交换 Kf=6l#J7
break; ^n! j"
SortUtil.swap(queue,j,k); R`M>w MLH
k = j; z}Y23W&sX
} 3B*b d
} 4)- ?1?)
private void fixUp(int k) { Vyy;mEBg
while (k > 1) { KmF"Ccc
int j = k >> 1; ,q9nHZG^
if (queue[j]>queue[k]) )9F o
break; u7PtGN0r%
SortUtil.swap(queue,j,k); 4I"%GN[tA
k = j; z"7I5N
} BhAWIH8@C
} &8=wkG%
JSXJlau
} %@C(H%obWd
V2Iqk]V%y
} FKYPkFB
+Cs[]~
SortUtil： u.\FNa
;4(ULJ*
package org.rut.util.algorithm; *[VO03
QuB`}rfLf
import org.rut.util.algorithm.support.BubbleSort; ~rnbuIh
import org.rut.util.algorithm.support.HeapSort; T"h@-UcTl
import org.rut.util.algorithm.support.ImprovedMergeSort; pr~%%fCh
import org.rut.util.algorithm.support.ImprovedQuickSort; )I~U&sT\/
import org.rut.util.algorithm.support.InsertSort; o )\\(^ld
import org.rut.util.algorithm.support.MergeSort; [p&n]T
import org.rut.util.algorithm.support.QuickSort; g5",jTn#
import org.rut.util.algorithm.support.SelectionSort; Z<_"Tk;!',
import org.rut.util.algorithm.support.ShellSort; ,K/l;M5I
&#[w*t(A
/** s&Bk@a8
* @author treeroot ^nO0/nqz]
* @since 2006-2-2 xi+bBqg<.K
* @version 1.0 ;)nkY6-
*/ qu8!fFQjYL
public class SortUtil { R_DstpsT
public final static int INSERT = 1; 1w`]2
public final static int BUBBLE = 2; /z=xEnU#
public final static int SELECTION = 3; ,Yp+&&p.
public final static int SHELL = 4; cWp5' e]A
public final static int QUICK = 5; &*Sgyk o`
public final static int IMPROVED_QUICK = 6; ;+-@AYl
public final static int MERGE = 7; Fx@ovI- 5
public final static int IMPROVED_MERGE = 8; g?7I7W~?`
public final static int HEAP = 9; 7LFJi@*8
TTYM!+T
public static void sort(int[] data) { Xmmb^2I
sort(data, IMPROVED_QUICK); ,(&p"O":
} >Bw<THx
private static String[] name={ x]6-r`O7r
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |\}&mBR
}; w"PnN
f6of8BOg
private static Sort[] impl=new Sort[]{ pA%}CmrMq
new InsertSort(), v[7iWBqJ
new BubbleSort(), l1M %
new SelectionSort(), AfAlDM'
new ShellSort(), h0cdRi
new QuickSort(), LL0Y$pHV
new ImprovedQuickSort(), Ri
new MergeSort(), #oYPe:8|m
new ImprovedMergeSort(), 6D\$K
new HeapSort() B5A/Iv)2
}; w$)NW57[|
C{*' p+f
public static String toString(int algorithm){ 3BZa}Q_
return name[algorithm-1]; 7I$~E
} '!hA!eo>J
yjF;%A/0
public static void sort(int[] data, int algorithm) { "^froQ{"T
impl[algorithm-1].sort(data); ia9=&Hy])
} z [|:HS&
)X2/_3
public static interface Sort { jW8,}Xs
public void sort(int[] data); ?lPn{oB9"
} `MLOf
]Pp}=hcD
public static void swap(int[] data, int i, int j) { p{vGc-zP.
int temp = data; _Xqa_6+/
data = data[j]; '5)PYjMnH
data[j] = temp; /g`!Zn8a
} &FpoMW
} /Kd9UQU